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PU2CLR Si4735 Arduino Library 2.1.4
Arduino Library for Si47XX Devices - By Ricardo Lima Caratti
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Functions | |
| bool | SI4735::getSignalQualityInterrupt () |
| Get the Signal Quality Interrupt status. | |
| bool | SI4735::getRadioDataSystemInterrupt () |
| Get the Radio Data System (RDS) Interrupt status. | |
| bool | SI4735::getTuneCompleteTriggered () |
| Get the Tune Complete status. | |
| bool | SI4735::getStatusError () |
| Get the Status Error. | |
| bool | SI4735::getStatusCTS () |
| Gets the Error flag Clear to Send. | |
| bool | SI4735::getACFIndicator () |
| Returns true if the AFC rails (AFC Rail Indicator). | |
| bool | SI4735::getBandLimit () |
| Returns true if a seek hit the band limit. | |
| bool | SI4735::getStatusValid () |
| Gets the channel status. | |
| uint8_t | SI4735::getReceivedSignalStrengthIndicator () |
| Returns the value of Received Signal Strength Indicator (dBμV). | |
| uint8_t | SI4735::getStatusSNR () |
| Gets the SNR metric when tune is complete (dB) | |
| uint8_t | SI4735::getStatusMULT () |
| Get the Status the M U L T. | |
| bool | SI4735::isAgcEnabled () |
| Checks if the AGC is enabled. | |
| uint8_t | SI4735::getAgcGainIndex () |
| Gets the current AGC gain index. | |
| void | SI4735::setAGC (uint8_t AGCDIS, uint8_t AGCIDX) |
| Automatic Gain Control setup (alternative name for setAutomaticGainControl ) | |
| uint8_t | SI4735::getCurrentRSSI () |
| Get the current receive signal strength (0–127 dBμV) | |
| uint8_t | SI4735::getCurrentSNR () |
| Gets the current SNR metric (0–127 dB). | |
| bool | SI4735::getCurrentRssiDetectLow () |
| Checks if RSSI detected is LOW. | |
| bool | SI4735::getCurrentRssiDetectHigh () |
| Checks if RSSI detected is high. | |
| bool | SI4735::getCurrentSnrDetectLow () |
| Checks if SNR detect is low. | |
| bool | SI4735::getCurrentSnrDetectHigh () |
| Checks if SNR detect is high. | |
| bool | SI4735::getCurrentValidChannel () |
| Checks if the current channel is valid. | |
| bool | SI4735::getCurrentAfcRailIndicator () |
| AFC Rail Indicator. | |
| bool | SI4735::getCurrentSoftMuteIndicator () |
| Soft Mute Indicator. | |
| uint8_t | SI4735::getCurrentStereoBlend () |
| Gets the value of the amount of stereo blend in % (100 = full stereo, 0 = full mono). | |
| bool | SI4735::getCurrentPilot () |
| Checks the current pilot. | |
| uint8_t | SI4735::getCurrentMultipath () |
| Gets the current Multipath. | |
| uint8_t | SI4735::getCurrentSignedFrequencyOffset () |
| Gets the Signed frequency offset (kHz). | |
| bool | SI4735::getCurrentMultipathDetectLow () |
| Get Multipath Detect Low. | |
| bool | SI4735::getCurrentMultipathDetectHigh () |
| Gets the Current Multipath Detect High. | |
| bool | SI4735::getCurrentBlendDetectInterrupt () |
| Gets the Current Blend Detect Interrupt. | |
| void | SI4735::setFMDeEmphasis (uint8_t parameter) |
| Sets the FM Receive de-emphasis to 50 or 75 μs. | |
| void | SI4735::setFmSoftMuteMaxAttenuation (uint8_t smattn=0) |
| Sets the Fm Soft Mute Max Attenuation. | |
| void | SI4735::setAMDeEmphasis (uint8_t parameter) |
| Sets the AM Receive de-emphasis to 50 or disable. | |
| void | SI4735::setAMSoftMuteSlop (uint8_t parameter) |
| Sets the AM attenuation slope during soft mute. | |
| void | SI4735::setAMSoftMuteRate (uint8_t parameter) |
| Sets the attack and decay rates when entering or leaving soft mute. | |
| void | SI4735::setAMSoftMuteSnrThreshold (uint8_t parameter) |
| Sets the SNR threshold to engage soft mute. | |
| void | SI4735::setAMSoftMuteReleaseRate (uint8_t parameter) |
| Sets the soft mute release rate. | |
| void | SI4735::setAMSoftMuteAttackRate (uint16_t parameter) |
| Sets the soft mute attack rate. | |
| void | SI4735::setAmAgcAttackRate (uint16_t parameter) |
| Sets the AGC attack rate. | |
| void | SI4735::setAmAgcReleaseRate (uint16_t parameter) |
| Sets the AGC release rate. | |
| void | SI4735::setAMFrontEndAgcControl (uint8_t MIN_GAIN_INDEX, uint8_t ATTN_BACKUP) |
| Adjusts the AM AGC for external front-end attenuator and external front-end cascode LNA. | |
| bool | SI4735::isCurrentTuneAM () |
| Returns true if the current function is AM (AM_TUNE_FREQ). | |
| bool | SI4735::isCurrentTuneSSB () |
| Returns true if the current function is SSB (SSB_TUNE_FREQ). | |
| uint8_t | SI4735::getTuneFrequecyFast () |
| Returns the FAST tuning status. | |
| void | SI4735::setTuneFrequencyFast (uint8_t FAST) |
| Sets the FAST Tuning. | |
| uint8_t | SI4735::getTuneFrequecyFreeze () |
| Returns the FREEZE status. | |
| void | SI4735::setTuneFrequencyFreze (uint8_t FREEZE) |
| Sets Freeze Metrics During Alternate Frequency Jum. | |
| void | SI4735::setFrequencyUp () |
| Set the FrequencyUp. | |
| void | SI4735::setFrequencyDown () |
| Set the Frequency Down. | |
| void | SI4735::setMaxSeekTime (long time_in_ms) |
| Sets the maximum time in milliseconds for seeking. The default value is 8000ms (8s). | |
| void | SI4735::seekStationUp () |
| Search for the next station. | |
| void | SI4735::seekStationDown () |
| Search the previous station. | |
| void | SI4735::setSeekAmSrnThreshold (uint16_t value) |
| Set the Seek Am Srn Threshold object. | |
| void | SI4735::setSeekAmSNRThreshold (uint16_t value) |
| Sets the SNR threshold for a valid AM Seek/Tune. | |
| void | SI4735::setSeekFmSrnThreshold (uint16_t value) |
| Set the Seek Fm Srn Threshold object. | |
| void | SI4735::setSeekFmSNRThreshold (uint16_t value) |
| Sets the SNR threshold for a valid FM Seek/Tune. | |
| void | SI4735::setMaxDelaySetFrequency (uint16_t ms) |
| Set the Max Delay after Set Frequency. | |
| void | SI4735::setFrequencyStep (uint16_t step) |
| Sets the current step value. | |
| uint16_t | SI4735::getCurrentFrequency () |
| Gets the current frequency saved in memory. | |
| void | SI4735::getStatus () |
| Gets the current status of the Si47XX (AM, FM or SSB) | |
| void | SI4735::setTuneFrequencyAntennaCapacitor (uint16_t capacitor) |
| Selects the tuning capacitor value. | |
| void | SI4735::setFrequency (uint16_t) |
| Set the frequency to the corrent function of the Si4735 (FM, AM or SSB) | |
| void | SI4735::frequencyUp () |
| Increments the current frequency on current band/function by using the current step. | |
| void | SI4735::frequencyDown () |
| Decrements the current frequency on current band/function by using the current step. | |
| void | SI4735::setAM () |
| Sets the radio to AM function. It means: LW MW and SW. | |
| void | SI4735::setFM () |
| Sets the radio to FM function. | |
| void | SI4735::setAM (uint16_t fromFreq, uint16_t toFreq, uint16_t intialFreq, uint16_t step) |
| Sets the radio to AM (LW/MW/SW) function. | |
| void | SI4735::setFM (uint16_t fromFreq, uint16_t toFreq, uint16_t initialFreq, uint16_t step) |
| Sets the radio to FM function. | |
| void | SI4735::setBandwidth (uint8_t AMCHFLT, uint8_t AMPLFLT) |
| Selects the bandwidth of the channel filter for AM reception. | |
| uint16_t | SI4735::getFrequency (void) |
| Gets the current frequency of the Si4735 (AM or FM) | |
| void | SI4735::getStatus (uint8_t, uint8_t) |
| Gets the current status of the Si4735 (AM or FM) | |
| void | SI4735::getAutomaticGainControl () |
| Queries Automatic Gain Control STATUS. | |
| void | SI4735::setAutomaticGainControl (uint8_t AGCDIS, uint8_t AGCIDX) |
| Automatic Gain Control setup. | |
| void | SI4735::setAvcAmMaxGain (uint8_t gain=90) |
| Sets the maximum gain for automatic volume control. | |
| void | SI4735::getCurrentReceivedSignalQuality (uint8_t INTACK) |
| Queries the status of the Received Signal Quality (RSQ) of the current channel. | |
| void | SI4735::getCurrentReceivedSignalQuality (void) |
| Queries the status of the Received Signal Quality (RSQ) of the current channel (FM_RSQ_STATUS) | |
| void | SI4735::seekStation (uint8_t SEEKUP, uint8_t WRAP) |
| Look for a station (Automatic tune) | |
| void | SI4735::seekNextStation () |
| Search for the next station. | |
| void | SI4735::seekPreviousStation () |
| Search the previous station. | |
| void | SI4735::seekStationProgress (void(*showFunc)(uint16_t f), uint8_t up_down) |
| Seeks a station up or down. | |
| void | SI4735::seekStationProgress (void(*showFunc)(uint16_t f), bool(*stopSeking)(), uint8_t up_down) |
| Seeks a station up or down. | |
| void | SI4735::setSeekAmLimits (uint16_t bottom, uint16_t top) |
| Sets the bottom frequency and top frequency of the AM band for seek. Default is 520 to 1710. | |
| void | SI4735::setSeekFmLimits (uint16_t bottom, uint16_t top) |
| Sets the bottom frequency and top frequency of the FM band for seek. Default is 8750 to 10790. | |
| void | SI4735::setSeekAmSpacing (uint16_t spacing) |
| Selects frequency spacingfor AM seek. Default is 10 kHz spacing. | |
| void | SI4735::setSeekFmSpacing (uint16_t spacing) |
| Selects frequency spacingfor FM seek. Default is 100 kHz (value 10) spacing. There are only 3 valid values: 5, 10, and 20. | |
| void | SI4735::setSeekAmRssiThreshold (uint16_t value) |
| Sets the RSSI threshold for a valid AM Seek/Tune. | |
| void | SI4735::setSeekFmRssiThreshold (uint16_t value) |
| Sets the RSSI threshold for a valid FM Seek/Tune. | |
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Get the Signal Quality Interrupt status.
STATUS RESPONSE Set of methods to get current status information. Call them after getStatus or getFrequency or seekStation
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Get the Radio Data System (RDS) Interrupt status.
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Get the Tune Complete status.
Seek/Tune Complete Interrupt; 1 = Tune complete has been triggered.
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Get the Status Error.
Return the Error flag (true or false) of status of the least Tune or Seek
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Gets the Error flag Clear to Send.
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Returns true if the AFC rails (AFC Rail Indicator).
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Returns true if a seek hit the band limit.
(WRAP = 0 in FM_START_SEEK) or wrapped to the original frequency(WRAP = 1).
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Gets the channel status.
Returns true if the channel is currently valid as determined by the seek/tune properties (0x1403, 0x1404, 0x1108)
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Returns the value of Received Signal Strength Indicator (dBμV).
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Gets the SNR metric when tune is complete (dB)
Returns the value of the SNR metric when tune is complete (dB).
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Get the Status the M U L T.
Returns the value containing the multipath metric when tune is complete.
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Checks if the AGC is enabled.
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Gets the current AGC gain index.
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Automatic Gain Control setup (alternative name for setAutomaticGainControl )
If FM, overrides AGC setting by disabling the AGC and forcing the LNA to have a certain gain that ranges between 0 (minimum attenuation) and 26 (maximum attenuation).
If AM/SSB, Overrides the AGC setting by disabling the AGC and forcing the gain index that ranges between 0 (minimum attenuation) and 37+ATTN_BACKUP (maximum attenuation).
| uint8_t | AGCDIS This param selects whether the AGC is enabled or disabled (0 = AGC enabled; 1 = AGC disabled); |
| uint8_t | AGCIDX AGC Index (0 = Minimum attenuation (max gain); 1 – 36 = Intermediate attenuation); if >greater than 36 - Maximum attenuation (min gain) ). |
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Get the current receive signal strength (0–127 dBμV)
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Gets the current SNR metric (0–127 dB).
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Checks if RSSI detected is LOW.
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Checks if RSSI detected is high.
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Checks if SNR detect is low.
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Checks if SNR detect is high.
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Checks if the current channel is valid.
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AFC Rail Indicator.
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Soft Mute Indicator.
Indicates soft mute is engaged.
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Gets the value of the amount of stereo blend in % (100 = full stereo, 0 = full mono).
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Checks the current pilot.
Indicates stereo pilot presence.
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Gets the current Multipath.
Contains the current multipath metric. (0 = no multipath; 100 = full multipath)
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Gets the Signed frequency offset (kHz).
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Get Multipath Detect Low.
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Gets the Current Multipath Detect High.
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Gets the Current Blend Detect Interrupt.
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Sets the FM Receive de-emphasis to 50 or 75 μs.
valid parameters are 1 = 50 μs. Usedin Europe, Australia, Japan; 2 = 75 μs. Used in USA (default)
| parameter | 1 or 2 (default 1 - USA) |
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Sets the Fm Soft Mute Max Attenuation.
This function can be useful to disable Soft Mute on FM mode. The value 0 disable soft mute.
Specified in units of dB. Default maximum attenuation is 8 dB. It works for AM and SSB.
| smattn | Maximum attenuation to apply when in soft mute |
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Sets the AM Receive de-emphasis to 50 or disable.
valid parameters are 1 = 50 μs. Usedin urope, Australia, Japan; 2 = 75 μs. Used in USA (default)
| parameter | 1 = enable or 0 = disable |
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Sets the AM attenuation slope during soft mute.
Configures attenuation slope during soft mute in dB attenuation per dB SNR below the soft mute SNR threshold.
Soft mute attenuation is the minimum of SMSLOPEx(SMTHR–SNR) and SMATTN.
The default slope is 1 dB/dB for AMRX component 5.0 or later and 2 dB/dB for AMRX component 3.0 or earlier.
| parameter | the valid values are 1–5 (default 1). |
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Sets the attack and decay rates when entering or leaving soft mute.
The value specified is multiplied by 4.35 dB/s to come up with the actual attack rate
The default rate is 278 dB/s.
| parameter | The valid values are 1-255 ( Default is ~64 - [64 x 4.35 = 278] ) |
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Sets the SNR threshold to engage soft mute.
Whenever the SNR for a tuned frequency drops below this threshold the AM reception will go in soft mute,
provided soft mute max attenuation property is non-zero. The default value is 8dB
| parameter | 0-63 (default is 8) |
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Sets the soft mute release rate.
Smaller values provide slower release and larger values provide faster release. The default is 8192 (approximately 8000 dB/s).
| parameter | 1–32767 |
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Sets the soft mute attack rate.
Smaller values provide slower attack and larger values provide faster attack.
| parameter | 1–32767 (The default is 8192 (approximately 8000 dB/s) |
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Sets the AGC attack rate.
Large values provide slower attack, and smaller values provide faster attack..
| parameter | Range: 4–248 (The default is 0x04) |
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Sets the AGC release rate.
Larger values provide slower release, and smaller values provide faster release.
| parameter | Range: 4–248 (The default is 0x8C) |
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Adjusts the AM AGC for external front-end attenuator and external front-end cascode LNA.
This property contains two fields: MIN_GAIN_INDEX and ATTN_BACKUP.
MIN_GAIN_INDEX impacts sensitivity and U/D performance. Lower values improve sensitivity, but degrade
far away blocker U/D performance.
Higher values degrade sensitivity, but improve U/D. With MIN_GAIN_INDEX=19 and Si4743 EVB reference
design, the Si474x provides sensitivity of 28dBuV typical and U/D exceeding 55dB on far away blockers.
With MIN_GAIN_INDEX=24, the Si474x provides sensitivity of 34dBuV typical and U/D approaching 70dB on
far away blockers.
| MIN_GAIN_INDEX | Values below 19 have minimal sensitivity improvement; Higher values degrade sensitivity, but improve U/D. |
| ATTN_BACKUP | ??? |
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Returns true if the current function is AM (AM_TUNE_FREQ).
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Returns true if the current function is SSB (SSB_TUNE_FREQ).
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Returns the FAST tuning status.
@retrn uint8_t
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Sets the FAST Tuning.
If set, excutes fast and invalidated tune. Theune status will not be accurate
| FAST |
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Returns the FREEZE status.
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Sets Freeze Metrics During Alternate Frequency Jum.
Only on FM mode
| FREEZE |
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Set the Frequency Down.
same frequencyDown
References SI4735::frequencyDown().
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Sets the maximum time in milliseconds for seeking. The default value is 8000ms (8s).
Depending on the bandwidth, your reception conditions or step configuration, the seek process can take a long time.
This function sets a time limit for seeking process and back the control to the system if the time runs out.
| time_in_ms | time in milliseconds. |
References SI4735::maxSeekTime.
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Search for the next station.
Seek a station up. Stop when a station is found or the frequency has reached the upper limit
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Search the previous station.
Seek a station Down. Stop when a station is found or the frequency has reached the lower limit
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Set the Seek Am Srn Threshold object.
| value |
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Sets the SNR threshold for a valid AM Seek/Tune.
If the value is zero then SNR threshold is not considered when doing a seek. Default value is 5 dB.
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Set the Seek Fm Srn Threshold object.
| value |
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Sets the SNR threshold for a valid FM Seek/Tune.
SNR Threshold which determines if a valid channel has been found during Seek/Tune. Specified in units of dB in 1 dB steps (0–127). Default is 3 dB
| value | between 0 and 127. |
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Set the Max Delay after Set Frequency.
After the set frequency command, the system need a time to get ready to the next set frequency (default value 30ms).
Why the waitToSend() does not work in this case? No idea for while!
A low value makes the getFrequency command inaccurate.
| ms |
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Sets the current step value.
This function does not check the limits of the current band. Do not take a step that will extend past the limit of the band.
Example:
| step | if you are using FM, 10 means 100kHz. If you are using AM 10 means 10kHz For AM, 1 (1kHz) to 1000 (1MHz) are valid values. For FM 5 (50kHz), 10 (100kHz) and 100 (1MHz) are valid values. |
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Gets the current frequency saved in memory.
Unlike getFrequency, this method gets the current frequency recorded after the last setFrequency command.
This method avoids bus traffic and CI processing.
However, you can not get others status information like RSSI.
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Gets the current status of the Si47XX (AM, FM or SSB)
References SI4735::getStatus().
Referenced by SI4735::getFrequency(), and SI4735::getStatus().
| void SI4735::setTuneFrequencyAntennaCapacitor | ( | uint16_t | capacitor | ) |
Selects the tuning capacitor value.
On FM mode, the Antenna Tuning Capacitor is valid only when using TXO/LPI pin as the antenna input. This selects the value of the antenna tuning capacitor manually, or automatically if set to zero. The valid range is 0 to 191. Automatic capacitor tuning is recommended. For example, if the varactor is set to a value of 5 manually, when read back the value will be 1.
on AM mode, If the value is set to anything other than 0, the tuning capacitance is manually set as 95 fF x ANTCAP + 7 pF. ANTCAP manual range is 1–6143. Automatic capacitor tuning is recommended. In SW mode, ANTCAPH[15:8] (high byte) needs to be set to 0 and ANTCAPL[7:0] (low byte) needs to be set to 1.
| capacitor | If zero, the tuning capacitor value is selected automatically. If the value is set to anything other than 0: AM - the tuning capacitance is manually set as 95 fF x ANTCAP + 7 pF. ANTCAP manual range is 1–6143; FM - the valid range is 0 to 191. According to Silicon Labs, automatic capacitor tuning is recommended (value 0). |
| void SI4735::setFrequency | ( | uint16_t | freq | ) |
Set the frequency to the corrent function of the Si4735 (FM, AM or SSB)
You have to call setup or setPowerUp before call setFrequency.
| uint16_t | freq is the frequency to change. For example, FM => 10390 = 103.9 MHz; AM => 810 = 810 kHz. |
References SI4735::waitToSend().
| void SI4735::frequencyUp | ( | ) |
Increments the current frequency on current band/function by using the current step.
Referenced by SI4735::setFrequencyUp().
| void SI4735::frequencyDown | ( | ) |
Decrements the current frequency on current band/function by using the current step.
Referenced by SI4735::setFrequencyDown().
| void SI4735::setAM | ( | ) |
Sets the radio to AM function. It means: LW MW and SW.
Define the band range you want to use for the AM mode.
References SI4735::powerDown(), and SI4735::radioPowerUp().
Referenced by SI4735::setAM().
| void SI4735::setFM | ( | ) |
Sets the radio to FM function.
References SI4735::disableFmDebug(), SI4735::powerDown(), and SI4735::radioPowerUp().
Referenced by SI4735::setFM().
| void SI4735::setAM | ( | uint16_t | fromFreq, |
| uint16_t | toFreq, | ||
| uint16_t | initialFreq, | ||
| uint16_t | step | ||
| ) |
Sets the radio to AM (LW/MW/SW) function.
The example below sets the band from 550kHz to 1750kHz on AM mode. The band will start on 810kHz and step is 10kHz.
| fromFreq | minimum frequency for the band |
| toFreq | maximum frequency for the band |
| initialFreq | initial frequency |
| step | step used to go to the next channel |
References SI4735::setAM().
| void SI4735::setFM | ( | uint16_t | fromFreq, |
| uint16_t | toFreq, | ||
| uint16_t | initialFreq, | ||
| uint16_t | step | ||
| ) |
Sets the radio to FM function.
Defines the band range you want to use for the FM mode.
The example below sets the band from 64MHz to 108MHzkHz on FM mode. The band will start on 103.9MHz and step is 100kHz. On FM mode, the step 10 means 100kHz. If you want a 1MHz step, use 100.
| fromFreq | minimum frequency for the band |
| toFreq | maximum frequency for the band |
| initialFreq | initial frequency (default frequency) |
| step | step used to go to the next channel |
References SI4735::setFM().
| void SI4735::setBandwidth | ( | uint8_t | AMCHFLT, |
| uint8_t | AMPLFLT | ||
| ) |
Selects the bandwidth of the channel filter for AM reception.
The choices are 6, 4, 3, 2, 2.5, 1.8, or 1 (kHz). The default bandwidth is 2 kHz. It works only in AM / SSB (LW/MW/SW)
| AMCHFLT | the choices are: 0 = 6 kHz Bandwidth 1 = 4 kHz Bandwidth 2 = 3 kHz Bandwidth 3 = 2 kHz Bandwidth 4 = 1 kHz Bandwidth 5 = 1.8 kHz Bandwidth 6 = 2.5 kHz Bandwidth, gradual roll off 7–15 = Reserved (Do not use). |
| AMPLFLT | Enables the AM Power Line Noise Rejection Filter. |
References SI4735::waitToSend().
| uint16_t SI4735::getFrequency | ( | void | ) |
Gets the current frequency of the Si4735 (AM or FM)
The method status do it an more. See getStatus below.
References SI4735::getStatus().
| void SI4735::getStatus | ( | uint8_t | INTACK, |
| uint8_t | CANCEL | ||
| ) |
Gets the current status of the Si4735 (AM or FM)
| uint8_t | INTACK Seek/Tune Interrupt Clear. If set, clears the seek/tune complete interrupt status indicator; |
| uint8_t | CANCEL Cancel seek. If set, aborts a seek currently in progress; |
References SI4735::waitToSend().
| void SI4735::getAutomaticGainControl | ( | ) |
Queries Automatic Gain Control STATUS.
After call this method, you can call isAgcEnabled to know the AGC status and getAgcGainIndex to know the gain index value.
References SI4735::waitToSend().
| void SI4735::setAutomaticGainControl | ( | uint8_t | AGCDIS, |
| uint8_t | AGCIDX | ||
| ) |
Automatic Gain Control setup.
If FM, overrides AGC setting by disabling the AGC and forcing the LNA to have a certain gain that ranges between 0 (minimum attenuation) and 26 (maximum attenuation).
If AM/SSB, Overrides the AGC setting by disabling the AGC and forcing the gain index that ranges between 0 (minimum attenuation) and 37+ATTN_BACKUP (maximum attenuation).
| uint8_t | AGCDIS This param selects whether the AGC is enabled or disabled (0 = AGC enabled; 1 = AGC disabled); |
| uint8_t | AGCIDX AGC Index (0 = Minimum attenuation (max gain); 1 – 36 = Intermediate attenuation); if >greater than 36 - Maximum attenuation (min gain) ). |
References SI4735::waitToSend().
| void SI4735::setAvcAmMaxGain | ( | uint8_t | gain = 90 | ) |
Sets the maximum gain for automatic volume control.
Sets the gain for automatic volume control.
| uint8_t | gain Select a value between 12 and 90. Defaul value 48dB. |
| void SI4735::getCurrentReceivedSignalQuality | ( | uint8_t | INTACK | ) |
Queries the status of the Received Signal Quality (RSQ) of the current channel.
This method sould be called berore call getCurrentRSSI(), getCurrentSNR() etc. Command FM_RSQ_STATUS
| INTACK | Interrupt Acknowledge. 0 = Interrupt status preserved; 1 = Clears RSQINT, BLENDINT, SNRHINT, SNRLINT, RSSIHINT, RSSILINT, MULTHINT, MULTLINT. |
References SI4735::waitToSend().
| void SI4735::getCurrentReceivedSignalQuality | ( | void | ) |
Queries the status of the Received Signal Quality (RSQ) of the current channel (FM_RSQ_STATUS)
| INTACK | Interrupt Acknowledge. 0 = Interrupt status preserved; 1 = Clears RSQINT, BLENDINT, SNRHINT, SNRLINT, RSSIHINT, RSSILINT, MULTHINT, MULTLINT. |
References SI4735::getCurrentReceivedSignalQuality().
Referenced by SI4735::getCurrentReceivedSignalQuality().
| void SI4735::seekStation | ( | uint8_t | SEEKUP, |
| uint8_t | WRAP | ||
| ) |
Look for a station (Automatic tune)
Starts a seek process for a channel that meets the RSSI and SNR criteria for AM.
This function does not work on SSB mode.
| SEEKUP | Seek Up/Down. Determines the direction of the search, either UP = 1, or DOWN = 0. |
| Wrap/Halt. | Determines whether the seek should Wrap = 1, or Halt = 0 when it hits the band limit. |
References SI4735::waitToSend().
| void SI4735::seekNextStation | ( | ) |
Search for the next station.
Like seekStationUp this function goes to a next station.
The main difference is the method used to look for a station.
| void SI4735::seekPreviousStation | ( | ) |
Search the previous station.
Like seekStationDown this function goes to a previous station.
The main difference is the method used to look for a station.
| void SI4735::seekStationProgress | ( | void(*)(uint16_t f) | showFunc, |
| uint8_t | up_down | ||
| ) |
Seeks a station up or down.
Seek up or down a station and call a function defined by the developer to show the frequency.
The first parameter of this function is a name of your function that you have to implement to show the current frequency.
If you do not want to show the seeking progress, you can set NULL instead the name of the function.
The code below shows an example using ta function the shows the current frequency on he Serial Monitor. You might want to implement a function that shows the frequency on your display device.
Also, you have to declare the frequency parameter that will be used by the function to show the frequency value.
This function does not work on SSB mode.
| showFunc | function that you have to implement to show the frequency during the seeking process. Set NULL if you do not want to show the progress. |
| up_down | set up_down = 1 for seeking station up; set up_down = 0 for seeking station down |
| void SI4735::seekStationProgress | ( | void(*)(uint16_t f) | showFunc, |
| bool(*)() | stopSeking, | ||
| uint8_t | up_down | ||
| ) |
Seeks a station up or down.
Seek up or down a station and call a function defined by the developer to show the frequency and stop seeking process by the user.
The first parameter of this function is a name of your function that you have to implement to show the current frequency.
The second parameter is the name function that will check stop seeking action. Thus function should return true or false and should read a button, encoder or some status to make decision to stop or keep seeking.
If you do not want to show the seeking progress, you can set NULL instead the name of the function.
If you do not want stop seeking checking, you can set NULL instead the name of a function.
The code below shows an example using ta function the shows the current frequency on he Serial Monitor. You might want to implement a function that shows the frequency on your display device.
Also, you have to declare the frequency parameter that will be used by the function to show the frequency value.
This function does not work on SSB mode.
| showFunc | function that you have to implement to show the frequency during the seeking process. Set NULL if you do not want to show the progress. |
| stopSeeking | functionthat you have to implement if you want to control the stop seeking action. Useful if you want abort the seek process. |
| up_down | set up_down = 1 for seeking station up; set up_down = 0 for seeking station down |
| void SI4735::setSeekAmLimits | ( | uint16_t | bottom, |
| uint16_t | top | ||
| ) |
Sets the bottom frequency and top frequency of the AM band for seek. Default is 520 to 1710.
| uint16_t | bottom - the bottom of the AM (MW/SW) mode for seek |
| uint16_t | top - the top of the AM (MW/SW) mode for seek |
| void SI4735::setSeekFmLimits | ( | uint16_t | bottom, |
| uint16_t | top | ||
| ) |
Sets the bottom frequency and top frequency of the FM band for seek. Default is 8750 to 10790.
| uint16_t | bottom - the bottom of the FM(VHF) mode for seek |
| uint16_t | top - the top of the FM(VHF) mode for seek |
| void SI4735::setSeekAmSpacing | ( | uint16_t | spacing | ) |
Selects frequency spacingfor AM seek. Default is 10 kHz spacing.
| uint16_t | spacing - step in kHz |
| void SI4735::setSeekFmSpacing | ( | uint16_t | spacing | ) |
Selects frequency spacingfor FM seek. Default is 100 kHz (value 10) spacing. There are only 3 valid values: 5, 10, and 20.
Although the guide does not mention it, the value 1 (10 kHz) seems to work better
| uint16_t | spacing - step in kHz |
| void SI4735::setSeekAmRssiThreshold | ( | uint16_t | value | ) |
Sets the RSSI threshold for a valid AM Seek/Tune.
If the value is zero then RSSI threshold is not considered when doing a seek. Default value is 25 dBμV.
| void SI4735::setSeekFmRssiThreshold | ( | uint16_t | value | ) |
Sets the RSSI threshold for a valid FM Seek/Tune.
RSSI threshold which determines if a valid channel has been found during seek/tune. Specified in units of dBμV in 1 dBμV steps (0–127). Default is 20 dBμV.


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A bash script that takes three arguments from the user (repo name, parter 1 initials, and partner 2 initials), and uses those variables to create a directory with repo name, create a "css" subdirectory, create an "img" subdirectory, create a styles.css document in the css subdirectory, create an index.html document in the repo folder, initialize the folder as a git repo, execute git pair with partner 1's and partner 2's intials, git adds all contents of the directory, makes a first paired commit, and opens the directory contents in atom.
A set of python and R scripts wrapped in a Java GUI for processing data generated by Affymetrix Expression Console as well as some meta-data, rendering them as a prelminary Array Performance Summary (APS), and reporting other important information, such as whether any samples were given duplicate names and whether any errors or re-runs occurred at the fluidics station. Stripped of PHI and proprietary information of tools I created at OHSU.
An html page crafted with cascading stylesheets and utilizing bootstrap that attempts to reproduce the Wikipedia homepage to highlight design skill (or current lack thereof)
A set of pythona and R scripts wrapped into a pipeline using a configuration text file to calculate metrics and run analyses typical of heterozygosity-fitness correlations (HFCs).
A satirical example of the world's worst vacation resort's website. HTML page crafted with cascading stylesheets.
A satirical example of the world's worst cupcake baker's MySpace-style blog. HTML page crafted with cascading stylesheets.


{% extends "account/base.html" %} {% load i18n %} {% block panel-title %}{% trans "Verify Your E-mail Address" %}{% endblock %} {% block content %}
{% blocktrans %}We have sent you an e-mail to {{ email }} for verification. Follow the link provided to finalize the signup process. Please contact us if you do not receive it within a few minutes.{% endblocktrans %}
{% endblock %}


Data
0
0
0
0
Number Of Particles
Mass (AMU)
Radius (pm)
Temperature (K)
Remove Divider
Reset Divider
Center Of Mass
Particle Flow Rate
Scale


Chapter 2 dealt with compound data as a means for constructing computational objects that have several parts, in order to model real-world objects that have several aspects. In that chapter we introduced the discipline of data abstraction, according to which data structures are specified in terms of constructors, which create data objects, and selectors, which access the parts of compound data objects. But we now know that there is another aspect of data that chapter 2 did not address. The desire to model systems composed of objects that have changing state leads us to the need to modify compound data objects, as well as to construct and select from them. In order to model compound objects with changing state, we will design data abstractions to include, in addition to selectors and constructors, operations called mutators, which modify data objects. For instance, modeling a banking system requires us to change account balances. Thus, a data structure for representing bank accounts might admit an operation set_balance($\textit{account}$, $\textit{new-value}$) that changes the balance of the designated account to the designated new value. Data objects for which mutators are defined are known as mutable data objects.
Chapter 2 introduced pairs as a general-purpose glue
for
synthesizing compound data. We begin this section by defining basic
mutators for pairs, so that pairs can serve as building blocks for
constructing mutable data objects. These mutators greatly enhance the
representational power of pairs, enabling us to build data structures
other than the sequences and trees that we worked with in
section \ref{sec:hierarchical-data}. We also present some examples of
simulations in which complex systems are modeled as collections of
objects with local state.


Please Select The Fruits U want to Buy
{{fruit.name}} {{fruit.price | currency:"₹"}}
Your Cart Includes:--
Sl. No.
Product
Price
Quantity
Total Amount
{{ $index + 1 }}
{{ c.name }}
{{ c.price | currency:"₹"}}
{{ c.count }}
{{c.price*c.count | currency:"₹"}}
Total Cart Value is :- {{total | currency:"₹"}}


Step 1
Contract Details
Terms
You can either enter specific term dates or opt for a period triggered by an event
Title Selection & Price
You may choose to put a price for the entire package or one for each title.
Payment Schedules
Please choose the payment schedules most adapted to your needs.
Pay attention, percentage is always the percentage of total amount


{include file="public/_meta"}
欢迎使用BBQ后台管理系统Hi.{$user.username}
上次登录IP：{$user.last_login_ip} 上次登录时间：{$user.last_login_time}
| 信息统计 | ||||||
|---|---|---|---|---|---|---|
| 统计 | 文章 | 反馈 | 主题 | 举报 | 用户 | 管理员 |
| 总数 | {$total.article} | {$total.feedback} | {$total.theme} | {$total.report} | {$total.user} | {$total.admin} |
| 今日 | {$today.article} | {$today.feedback} | {$today.theme} | {$today.report} | {$today.user} | {$today.admin} |
| 昨日 | {$yesterday.article} | {$yesterday.feedback} | {$yesterday.theme} | {$yesterday.report} | {$yesterday.user} | {$yesterday.admin} |
| 本周 | {$week.article} | {$week.feedback} | {$week.theme} | {$week.report} | {$week.user} | {$week.admin} |
| 本月 | {$month.article} | {$month.feedback} | {$month.theme} | {$month.report} | {$month.user} | {$month.admin} |


Review: Lethal Weapon 4
Starring: Mel Gibson/Danny Glover Renee Russo/Jet Li/Joe Pesci/Chris Rock
Reviewer: Joy Wyse
If there is any doubt that this sequel is not up to the original, forget it. It's every bit as good, if not better. There is no problem if you're one of the few people who didn't see any of the first three movies. You easily learn who the characters are and how they relate to each other. In its own way Lethal Weapon 4 reminds me of the old "Road" movies, or the Abbott and Costello series. Each one is able to stand on its own, but you know the characters and you feel that you were watching old friends. In this episode there are two new figures to entertain us. One, Jet Li, is a thing of beauty to behold. As the cool, controlled bad guy, he moves with the grace of a ballet dancer but the malice of the deadly killer that he is. The other, Chris Rock, becomes a continuing character as the new son-in-law of Murtagh [Danny Glover]. Chris, like Joe Pesci, utters most of the foul language in the film. Strangely, it becomes comical when Pesci tries to talk without swearing so that he can be quoted on TV.
It is enjoyable when seemingly unimportant scenes suddenly tie in and become parts of the story. If you catch them early enough, you have a feeling of pride that you figured them out before they're explained. It's also great to be in on the joke, such as when Danny Glover thinks that Chris Rock is gay, but we know that he is his son-in-law.
Although some of the stunts are highly improbable, they are nonetheless entertaining. By now, you've probably seen most of them on clips on TV. Even though you know that they are stunts and that everyone will survive, they are still harrowing. The fire is almost too real.
This is a very violent film with some stomach turning scenes. The garroting and the lancing made most adults grimace with pain. As always, there is plenty of humor surrounding the stars. The chicken sequence is a memorable on-running gag. There are many, many moments that you keep remembering. That is the mark of a truly entertaining movie. You keep thinking about it. I definitely want to see it again.
I give it a B.
Joy Wyse
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


That's embarrassing! An unexpected error occurred.
Please help out by submitting this error so it can be resolved.
The more detailed information you can provide the better!
That's embarrassing! An unexpected error occurred.
Please help out by submitting this error so it can be resolved.
The more detailed information you can provide the better!


The program is divided in parts by dividing it into parts , these parts can used agian which inturn reducecs lines of code.
The functions are classified into two types , they are :
Pre Defind Functions : These are the functions which are already declared in C Library.
Eg : scanf() , printf()
etc
User Defind Functions : These are the functions which are defind by the user at the time of writing programming
returnType functionName(type1 parameter1,type2 parameter2,...) { // Body of Function }
Function declaration in C programming consists of 4 parts ,They are :
Return Type : When a function performs a set of lines of code , it is said to return some type of the result , that is known as Return Type. It may be of value : int , float , char , double
. If it doesn't return then we have to mention it has void.
Function Name : The function name specifies the name of function and for naming of the function name same rules like other varibles in C langauge .
Parameter List : Paramerter List : These are the parameters that are declared in a function and it excepts those parameters when it is called.
Function Calling : Function name is used to call the function and when the function is called control of program is transferred to it.
functionName(arugment1,arugment2...);
Syntax :
Enter the two numbers for addtion 4 5 Addtion of two numbers is : 9
Passing Arugments to a function
Arugments are passed during the function call , these varibles are called Foraml parameters . Passing of arguments to function are of two types ,they are :
Call by Value : method of passing arguments to a function copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no effect on the argument.
Call by Reference : method of passing arguments to a function copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no effect on the argument.


Dip your toes into Elixir basics
with a walkthrough of a simple load testing tool
2 + 2 # 4
IO.puts "Oh, Hey!" # :ok, prints "Oh, Hey!"
events = [404, 500, :create, "dog"] # lists, dynamic typing
hd(events) # 404
tail(events) # [500, :create, "dog"
person = {:name, "Ben"} # 2-tuple
def fib(0) do: 0 # recursive fibonocci
def fib(1) do: 1 # pattern matching
def fib(n) do # multiple fun definitions
fib(n - 2) + fib(n - 1)
end
addTwo = fn a -> a + 2 end # anon function, 1st class
addTwo(2) # 4
Enum.map([1, 2, 3], addTwo) # [3, 4, 5]
iex(1)> pid = spawn fn -> IO.puts "I ... AM ... ALIVE!" end
I ... AM ... ALIVE! # printed from other process
#PID<0.85.0> # process identifier
iex(2)> Process.alive?(pid)
false # sadly, our process is dead :(
iex(3)> echoer = fn -> # define fun to receive msg
...(3)> receive do # blocking receive
...(3)> name -> IO.puts "Hi #{name}!"
...(3)> end
...(3)> end
iex(4)> pid2 = spawn echoer # create process, return pid
#PID<0.94.0>
iex(5)> Process.alive?(pid2) # alive, waiting for our msg
true
iex(6)> send(pid2,"Bob") # send async msg to other process
Hi Bob! # printed from other process
"Bob" # returned from send function
foo(0, 0) ->
boring; % Line terminator #1
foo(X, Y) ->
Y = math:add(X, Y), % Now we have 2
Z = Y rem 2,
case Z of
0 -> true; % Three for the win!
1 -> undefined % FOUR? nothing is really something
end.
But how does it do it?
200 + 200 # numbers
:dog # atoms (like symbols in Ruby)
name = "Ben" # binary strings
'Spruce' # list of ascii numbers ;)
person = {:name, name} # variable asigned a 2-tuple value
data = [1, 2, "dog"] # singly linked list
[100 | data] # [100, 1, 2, "dog"] # cheap
data ++ data # [1, 2, "dog", 1, 2, "dog"] # expensive
[id: 100, name: "Jane"] # keywordlist = [{:id, 100}, {:name, "Jane"}]
map = %{:a => 1, 2 => :b} # a map structure
map[:a] # returns 1
def print([]) do: :ok # pattern matching on function
def print([head | tail) do # pattern matching on value decomposition
IO.puts head
print(tail)
end # tail call optimized recursion
defmodule GreeterServer do
require Logger
use GenServer
def start_link(name) do # API METHOD, CALLED BY SUPERVISION TREE
GenServer.start_link(__MODULE__, name, [])
end
def init(my_name) do # initialize and return initial state
log("starting")
{:ok, my_name}
end
# async, use handle_call for simulated synchronous messages
def handle_cast(your_name, my_name) do
log("Hi #{your_name}, my name is #{my_name}")
{:noreply, my_name}
end
end
Stop checking Facebook and go to this URL
Please play around on the site for 60 seconds...
Does everyone have pruney fingers?


You can configure Virtual Network Interfaces (VNIs) for an in-path RSP package in the Configure > Branch Services > RSP Data Flow page.RSP packages use their own virtual network interfaces (VNIs), equivalent to VMware network interfaces, to communicate with the network. These virtual network interfaces are connected to the physical network interfaces on the Steelhead appliance, or taps into the optimization data flow. VNIs are network taps that enable data flow in and out of the RSP packages. VNIs are the connection points for the LAN, WAN, primary, and auxiliary interfaces of the Steelhead appliance.Each package can have up to ten RSP network interfaces, which enables each package to support ten VNIs. VNIs provide a great deal of configuration flexibility. VNIs also provide the basis for controlling the flow of data through packages in a multiple package scenario.Optimization VNIs - Optimization VNIs are used with in-band packages. Optimization VNIs are part of the optimized data flow on either the LAN- or WAN-side of RiOS. There are several types of optimization VNIs: In-path - In-path VNIs are used for packages such as security packages. These in-path optimization VNI types are available: LAN - LAN VNIs forward packets from the LAN-side to the virtual machine, to the WAN-side, or both. LAN VNIs unconditionally forward packets from the virtual machine to the LAN-side for RSP. LAN VNIs cannot receive packets from the WAN-side. For VRSP, packets from LAN or WAN VNIs can go in either direction, depending on the subnet side rules. For details, see Configuring Subnet Side Rules. WAN - WAN VNIs forward packets from the WAN-side to the virtual machine, to the LAN-side, or both. WAN VNIs unconditionally forward packets from the virtual machine to the WAN-side. WAN VNIs cannot receive packets from the LAN-side. Virtual-in-path - Virtual-in-path VNIs are used for packages that need redirection to intercept traffic. The types of virtual-in-path VNIs are: DNAT - Destination Network Address Translation (DNAT) VNIs are used for proxy-based solutions, such as video proxies. Mirror - Mirror VNIs are used with network monitoring-based solutions and act like a SPAN port. Management VNIs - Management VNIs are bridged to the Steelhead appliance primary or auxiliary port. Management VNIs are used as a management interface for in-band packages. Management VNIs are the primary communication path for out-of-band packages.
Start - Locates the VNI next to the LAN. A packet coming from the Steelhead appliance LAN interface goes to this VNI first. End - Locates the VNI next to the WAN. A packet coming from the Steelhead appliance WAN interface goes to this VNI first. Order number - Specifies the VNI order number. A lower number locates the VNI closer to the LAN. A higher number locates the VNI closer to the WAN. Select the check box next to the name and click Remove Selected VNIs. Moves the selected VNIs. Click the arrow next to the desired VNI position; the VNI moves to the new position.The next step is to add rules to configure the traffic flow, unless you use the default rules for the package. For more details on the package data flow, refer to the package documentation.Important: To route optimized traffic through a Steelhead appliance that is using QoS and RSP simultaneously, RiOS must be positioned last in the RSP traffic data flow. At the bottom of the RSP Data Flow page, verify that RiOS appears as the last item in the data flow table, directly above the WAN interface. If it does not appear last, select the check box next to RiOS, click Move Selected VNIs, and then click the arrow next to the position directly above WAN. RiOS moves to the last position.


Hover Overlay Style
When hovering an element an overlay is animated over the image to add styling and allow contrast for more readable text. Included is a number of classes to apply a gradient to this overlay. These gradient classes are applied to the figure
tag of your element. In the following example we are applying the c4-image-zoom-in
overlay style.
<figure class="c4-izmir c4-gradient-top-left">
<img src="https://source.unsplash.com/WLUHO9A_xik/400x300" alt="Sample Image">
<figcaption>
// Caption text
</figcaption>
</figure>
The gradient colors are taken from the primary-color
and secondary-color
custom properties. For details on changing these values either globally or locally within a single element, checkout the Custom Properties section.


--- layout: archive title: Zulip Chat Archive permalink: /stream/113489-new-members/topic/How.20to.20Extract.html ---
I have a statement Ha: \exists (\delta : \reals)(H: \delta > 0), \forall (otherstuff).
How to I extract \delta > 0?
Try rcases Ha with ⟨δ, hδ₀, hδ₁⟩
exists _ _
is shorthand for exists _, exists _
Last updated: Apr 24 2020 at 19:02 UTC


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<EMAIL_ADDRESS>Horizon 2k15 is the 12th annual National level Techno Management Festival
Dr. B. C. Roy Engineering College Durgapur.
Horizon 2k15 is coming soon...
From 26-02-2015 to 28-02-2015...
Interesting events and workshops...
Amazing and exciting prizes with cash Money!
Events For Students
There are events for every department and some Centralised and Gaming events are also there which is for every one!
For EveryOne
IGNITIA (GK Quiz) FLASH MOBCINEKSHETRA#include<Wannacode.h> WEB DEVELOPMENTTEE-ZINE (t-shirt painting)SHOW OFF (Poster making)BIZCOGNITO (business plan)XPOSED (Photography) ROBOTICSAPPSTRUCT (Android application development)PEN IT DOWN
For IT / CSE
THE LINQUEST (Computer quiz) HACK-A-SAURUS (Online coding)
For ECE
WIZZCOMBIZ (ECE quiz) JUNKTRONIX (from scrap to gold)FOX-TRADE (the circuit business)
For EIE
CATECHIZATION (EIE quiz)CHECKMATE (8085 programming) INNOVACION (model presentation)
For EE
ELECTROBUZZ (Electrical quiz) TRACK-N-CRACK (circuit debugging)
For ME
MECHTRIX (Mechanical quiz)
For CE
Infra Quiz (Civil duiz) The Builder (Building design)Make Ur World (Demo structure creation)Auto Cad Designing
Gaming Events
COUNTER STRIKE 1.6NFS MOST WANTEDFIFA 11ANGRY BIRDS TEKKEN
Workshops
There are four workshops which will be organised before our technical fest so be prepared for that!
Android workshop
This workshop is for everyone who likes coding and wants to develop his own application.
Robotics workshop
This workshop is for everyone who wants to design his own customised robot.
Web Development workshop
This workshop is for everyone who thinks to design his own web page.
Autocad and Engineering Drawing workshop
This workshop belongs to Mechanical and Civil department students.
Get in Touch
For any queries related to this, Please contact our organising members.
IT / CSE
Satyajeet Kumar +91-8293538913
Apoorv Ashutosh +91-9563494117
Abhishek Kumar +91-7679518800
ECE / EIE / EE
Farhad Khan +91-7679419773
Pritam Das +91-8906177350
Azfar Karim +91-9614318495
Sourojit Dhua +91-9733529526
Kumar Aryan +91-9749272743
Ketan Ghosh +91-9932944879
ME / CE
Akhilesh Kanaujia +91-7872284972
Avirup Karmakar +91-8900083477
Arup Kuila +91-8101336745
Priyodarshi Mallick +91-9732296002


glideTo
glideTo helps you to create modern scrolling websites (like this one) easily
glideTo helps you to create modern scrolling websites (like this one) easily
The plugin is written on CoffeeScript by Jeduan Cornejo
The smooth scrolling bit was lifted from CSS Tricks
I got great help on the API design from Daniel Zavala
$ git clone git://github.com/jeduan/jquery-glideto


{{+bindTo:partials.standard_nacl_api}}
| Graphics2D () | |
| Graphics2D (const Graphics2D &other) | |
| Graphics2D (const InstanceHandle &instance, const Size &size, bool is_always_opaque) | |
| virtual | ~Graphics2D () |
| Graphics2D & | operator= (const Graphics2D &other) |
| const Size & | size () const |
| void | PaintImageData (const ImageData &image, const Point &top_left) |
| void | PaintImageData (const ImageData &image, const Point &top_left, const Rect &src_rect) |
| void | Scroll (const Rect &clip, const Point &amount) |
| void | ReplaceContents (ImageData *image) |
| int32_t | Flush (const CompletionCallback &cc) |
| bool | SetScale (float scale) |
| float | GetScale () |
| bool | SetLayerTransform (float scale, const Point &origin, const Point &translate) |
Default constructor for creating an is_null() Graphics2D
object.
| pp::Graphics2D::Graphics2D | ( | const Graphics2D & | other | ) |
The copy constructor for Graphics2D.
The underlying 2D context is not copied; this constructor creates another reference to the original 2D context.
| [in] | other | A pointer to a Graphics2D context. |
| pp::Graphics2D::Graphics2D | ( | const InstanceHandle & | instance, |
| const Size & | size, | ||
| bool | is_always_opaque | ||
| ) |
A constructor allocating a new 2D graphics context with the given size in the browser, resulting object will be is_null() if the allocation failed.
| [in] | instance | The instance with which this resource will be associated. |
| [in] | size | The size of the 2D graphics context in the browser, measured in pixels. See SetScale() for more information. |
| [in] | is_always_opaque | Set the is_always_opaque flag to true if you know that you will be painting only opaque data to this context. This option will disable blending when compositing the module with the web page, which might give higher performance on some computers. |
If you set is_always_opaque
, your alpha channel should always be set to 0xFF or there may be painting artifacts. The alpha values overwrite the destination alpha values without blending when is_always_opaque
is true.
| virtual pp::Graphics2D::~Graphics2D | ( | ) | [virtual] |
A destructor that decrements the reference count of a Graphics2D
object made using the previous copy constructor.
It is possible that the destructor does not totally destroy the underlying 2D context if there are outstanding references to it.
| int32_t pp::Graphics2D::Flush | ( | const CompletionCallback & | cc | ) |
Flush() flushes any enqueued paint, scroll, and replace commands to the backing store.
This actually executes the updates, and causes a repaint of the webpage, assuming this graphics context is bound to a module instance.
Flush() runs in asynchronous mode. Specify a callback function and the argument for that callback function. The callback function will be executed on the calling thread when the image has been painted to the screen. While you are waiting for a Flush
callback, additional calls to Flush() will fail.
Because the callback is executed (or thread unblocked) only when the module's image is actually on the screen, this function provides a way to rate limit animations. By waiting until the image is on the screen before painting the next frame, you can ensure you're not flushing 2D graphics faster than the screen can be updated.
Unbound contexts If the context is not bound to a module instance, you will still get a callback. The callback will execute after Flush() returns to avoid reentrancy. The callback will not wait until anything is painted to the screen because there will be nothing on the screen. The timing of this callback is not guaranteed and may be deprioritized by the browser because it is not affecting the user experience.
Off-screen instances If the context is bound to an instance that is currently not visible (for example, scrolled out of view) it will behave like the "unbound context" case.
Detaching a context If you detach a context from a module instance, any pending flush callbacks will be converted into the "unbound context" case.
Released contexts A callback may or may not still get called even if you have released all of your references to the context. This can occur if there are internal references to the context that means it has not been internally destroyed (for example, if it is still bound to an instance) or due to other implementation details. As a result, you should be careful to check that flush callbacks are for the context you expect and that you're capable of handling callbacks for context that you may have released your reference to.
Shutdown If a module instance is removed when a Flush is pending, the callback will not be executed.
| [in] | cc | A CompletionCallback to be called when the image has been painted on the screen. |
PP_OK
on success or PP_ERROR_BADRESOURCE
if the graphics context is invalid, PP_ERROR_BADARGUMENT
if the callback is null and flush is being called from the main thread of the module, or PP_ERROR_INPROGRESS
if a flush is already pending that has not issued its callback yet. In the failure case, nothing will be updated and no callback will be scheduled. | float pp::Graphics2D::GetScale | ( | ) |
GetScale() gets the scale factor that will be applied when painting the graphics context onto the output device.
| Graphics2D& pp::Graphics2D::operator= | ( | const Graphics2D & | other | ) |
This function assigns one 2D graphics context to this 2D graphics context.
This function increases the reference count of the 2D resource of the other 2D graphics context while decrementing the reference counter of this 2D graphics context.
| [in] | other | An other 2D graphics context. |
| void pp::Graphics2D::PaintImageData | ( | const ImageData & | image, |
| const Point & | top_left | ||
| ) |
PaintImageData() enqueues a paint command of the given image into the context.
This command has no effect until you call Flush(). As a result, what counts is the contents of the bitmap when you call Flush, not when you call this function.
The provided image will be placed at top_left
from the top left of the context's internal backing store. This version of PaintImageData paints the entire image. Refer to the other version of this function to paint only part of the area.
The painted area of the source bitmap must fall entirely within the context. Attempting to paint outside of the context will result in an error.
There are two methods most modules will use for painting. The first method is to generate a new ImageData
and then paint it. In this case, you'll set the location of your painting to top_left
and set src_rect
to NULL
. The second is that you're generating small invalid regions out of a larger bitmap representing your entire module's image.
| void pp::Graphics2D::PaintImageData | ( | const ImageData & | image, |
| const Point & | top_left, | ||
| const Rect & | src_rect | ||
| ) |
PaintImageData() enqueues a paint command of the given image into the context.
This command has no effect until you call Flush(). As a result, what counts is the contents of the bitmap when you call Flush(), not when you call this function.
The provided image will be placed at top_left
from the top left of the context's internal backing store. Then the pixels contained in src_rect
will be copied into the backing store. This means that the rectangle being painted will be at src_rect
offset by top_left
.
The src_rect
is specified in the coordinate system of the image being painted, not the context. For the common case of copying the entire image, you may specify an empty src_rect
.
The painted area of the source bitmap must fall entirely within the context. Attempting to paint outside of the context will result in an error. However, the source bitmap may fall outside the context, as long as the src_rect
subset of it falls entirely within the context.
There are two methods most modules will use for painting. The first method is to generate a new ImageData
and then paint it. In this case, you'll set the location of your painting to top_left
and set src_rect
to NULL
. The second is that you're generating small invalid regions out of a larger bitmap representing your entire module. In this case, you would set the location of your image to (0,0) and then set src_rect
to the pixels you changed.
| void pp::Graphics2D::ReplaceContents | ( | ImageData * | image | ) |
ReplaceContents() provides a slightly more efficient way to paint the entire module's image.
Normally, calling PaintImageData() requires that the browser copy the pixels out of the image and into the graphics context's backing store. This function replaces the graphics context's backing store with the given image, avoiding the copy.
The new image must be the exact same size as this graphics context. If the new image uses a different image format than the browser's native bitmap format (use ImageData::GetNativeImageDataFormat() to retrieve the format), then a conversion will be done inside the browser which may slow the performance a little bit.
Note: The new image will not be painted until you call Flush().
After this call, you should take care to release your references to the image. If you paint to the image after ReplaceContents(), there is the possibility of significant painting artifacts because the page might use partially-rendered data when copying out of the backing store.
In the case of an animation, you will want to allocate a new image for the next frame. It is best if you wait until the flush callback has executed before allocating this bitmap. This gives the browser the option of caching the previous backing store and handing it back to you (assuming the sizes match). In the optimal case, this means no bitmaps are allocated during the animation, and the backing store and "front buffer" (which the module is painting into) are just being swapped back and forth.
| [in] | image | The ImageData to be painted. |
| void pp::Graphics2D::Scroll | ( | const Rect & | clip, |
| const Point & | amount | ||
| ) |
Scroll() enqueues a scroll of the context's backing store.
This function has no effect until you call Flush(). The data within the provided clipping rectangle will be shifted by (dx, dy) pixels.
This function will result in some exposed region which will have undefined contents. The module should call PaintImageData() on these exposed regions to give the correct contents.
The scroll can be larger than the area of the clipping rectangle, which means the current image will be scrolled out of the rectangle. This scenario is not an error but will result in a no-op.
| [in] | clip | The clipping rectangle. |
| [in] | amount | The amount the area in the clipping rectangle will shifted. |
| bool pp::Graphics2D::SetLayerTransform | ( | float | scale, |
| const Point & | origin, | ||
| const Point & | translate | ||
| ) |
| bool pp::Graphics2D::SetScale | ( | float | scale | ) |
SetScale() sets the scale factor that will be applied when painting the graphics context onto the output device.
Typically, if rendering at device resolution is desired, the context would be created with the width and height scaled up by the view's GetDeviceScale and SetScale called with a scale of 1.0 / GetDeviceScale(). For example, if the view resource passed to DidChangeView has a rectangle of (w=200, h=100) and a device scale of 2.0, one would call Create with a size of (w=400, h=200) and then call SetScale with 0.5. One would then treat each pixel in the context as a single device pixel.
| [in] | scale | The scale to apply when painting. |
true
on success or false
if the resource is invalid or the scale factor is 0 or less. | const Size& pp::Graphics2D::size | ( | ) | const [inline] |
Getter function for returning size of the 2D graphics context.


{% extends "fullscreen_base.html" %} {% block title %}Email Verification{% endblock %} {% block inner_content %}
If you don't see it in the next few minutes, Resend, or check your spam folder.


Fancy Modal Form
This page, which utilizes jQuery, demonstrates a form:
- inside a modal window
- with automatic vertical centering on the focused field
- field labels that behave as placeholders
To-Do:
- Add a dropdown field
This page, which utilizes jQuery, demonstrates a form:
To-Do:


<%- markdown(multiline(function () {
/*
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CNode By a group of community love Node.js Technical engineers launched ， Internet has attracted all the company's professional and technical personnel to join ， We very much welcome more pairs Node.js Friends of interest 。
CNode Of SLA Guaranteed ， A 9， That is 90.000000%。
Community currently consists of [@alsotang](http://cnodejs.org/user/alsotang) In Maintenance ， Have questions, please contact ：[https://github.com/alsotang](https://github.com/alsotang)。
*/
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Devices don’t come in fixed sizes such as extra-small (wearables), small (smartphone), medium (tablet), large (laptop), extra-large (desktop), extra-extra-large (TV’s). Yet, this is how emerging designers approach designing for the web. They start designing using the size of their own device and stop there. On occasion an emerging designer will create a second design for a different sized device. Notice I wrote create a second design. When someone visits a website the experience—both functionally and visually—should be seamless across devices. This is a vastly different concept needing a unique design approach, not simply creating a second design.
To keep visual designs seamless across devices and operating systems (think Android or iOS), the industry has shifted towards creating Design Systems, not web pages or apps. A well thought out design system contains the elements that construct a website or app such as a search function, navigation, headlines and images. Basically, designing a website from the inside out. This approach allows the element to be seamless across multiple devices and platforms.
However, what do design systems have to do with breakpoints and what are breakpoints? We will talk a lot about design systems as the semester goes along. For now, all you need to know is that you don’t design for specific devices, you design for content and you need to identify breakpoints for the content, not device sizes! So don’t think in terms of webpages or devices, think of content types when determining breakpoints. Full circle—a design system is a collection of content types.
So what is a Breakpoint? While not a technical answer, take the term literally for a clue. You identify the breakpoint of the content such as a three column gird containing text by determining the size of the open browser window when the content breaks. For example, at what point does the three columns of text break—become difficult for the site visitor to read. When the content breaks that is the point where there needs to be a breakpoint (adjustment) to the design. Notice I wrote adjustment not new design.
There are no hard and fast rules to determining breakpoints. Don’t think small, medium, large or phone, tablet, desktop. Focus on the content types. Typography (textual content) and its readability is great for determining breakpoints. As you learned in you beginning typography course, there are ideal line reading lengths and other things to consider when reading long form text. Simply trying to read a webpage’s text while adjusting your browser window or using a tool like Brad Frost’s Ish which I have setup for you on the class blog is a good place to start.
Another important type of content to consider are micro-interactions like buttons and forms. On a non-touch device, you will most likely have a mouse. The precision of a mouse cursor makes it relatively easy to click on a button if you have designed clearly enough for the user to identify it is a button. Precision is lost when the site visitor is using a touch device. Buttons and other input types like forms will need to be bigger to accommodate human fingers. However, the location of the button needs to be taken into consideration. When someone is using a mouse, they generally have access to the entire screen. When someone is holding a phone in their hand, they may only have easy access to a very limited area of the screen with the use of only one hand. Throw in larger hand held touch devices like tablets and you begin to understand all the decisions designers need to make.
Another content type easy to identify breakpoints for are images. When you crop an image suitable for a wide screen you can’t assume it still works when scaled to fit within a skinnier screen width. A good example of this is an image of President Barack Obama being sworn in. A wider version lets the viewer see Justice Kennedyand President Obama, with his family looking on. On a skinny screen the image is scaled to fit and the content breaks making it hard to see details of President Obama, the original intent of the image. This is where a breakpoint can be inserted that art directs the image to be cropped into President Obama and Michelle Obama to retain detail. Another breakpoint can be added to adjust the design to further crop into President Obama.
Side Note: if you don’t make these design decisions, the developer will. Unless you trust your developer to make these important design decision, you better start leaving them instructions on how to handle the images!
Now that you know what breakpoints are, I want you to review several websites and identify one element within two websites that has three or more breakpoints. You must demonstrate the element’s breakpoints by recording the change using QuickTime to create a .mov file or create a screenshot of each breakpoint. You will upload either two QuickTime movies or six screenshots via the DropBox link by the end of class that demonstrate the changing breakpoint. You can not use the websites listed above or below.
Don’t over think this. As I mentioned there are no perfect examples. Simply visit a website and resize the browser window and look for an element that changes at least three or more times. The changes may be slight, so don’t worry if you can’t find extreme examples like I have shown you.
This assignment will be worth 5 points and is due at the end of class. Name the files exactly as follows (all lowercase with hyphens and no blank spaces) what-are-breakpoints-firstname-lastname-01-(1-3).(jpg, png,mov,mp4), and what-are-breakpoints-firstname-lastname-02-(1-3).(jpg, png,mov,mp4), then upload the files via the DropBox link by the end of class.


Data Visualizaion PlugIns are a specialized version of Display PlugIns
This is a somewhat ammended version of a more general document
which describes two approaches to developing visualization plugins. For
the QuizGenerator project, all
we anticipate needing is the instrumented approach.
To make the facilities of the Teaching Machine available to other researchers without opening up the code base. The alternative is to release the TM as open source which we are reluctant to do only because it would turn us into code managers instead of code developers. Plugins make TM resources freely available without impairing the integrity of the existing code base.
So far we see TM Visualization plugins as being of two types:
Simply instrument some data set developed while the Teaching Machine is running any standard C++ or Java example. The visualization monitors the data. The changing state of the data as the TM steps through an example drives the visualization. Instrumented visualizations can be run with standard examples. As an example, we are planning to build a bar display that will show an array of ints as a set of bars of lengths proportional to the int value and use it to demonstrate sorting algorithms. Such displays are well known. The point here is to be able to easily integrate such a demo into the already highly integrated TM /Webwriter++ environment.
These visualizations provide an interface library that is called from the code example. Thus, unless a parallel visualization library exists, in the C++ or Java languages, these visualizations will only run examples written explicitly to work with the library. The current example of this kind of display is a window to open standard image files (jpeg, png, etc.) and make them available via a simple interface as simple 2D arrays of pixels which can be readily manipulated using standard code. Once the manipulations are performed the transformed pixels are sent back to the display where they can be shown.
Instrumented visualizations are more general, allowing an instructor to use any standard example (so long as it can be handled by the TM in the first place). Instruction driven visualizations are potentially more powerful. The addition of scripting now allows instructors to manipulate instrumented visualizations.
There are three distinct pieces of technology required to implement all this. The first is the plug-in system itself. Its role is to allow a new plug-in (of any kind) to be incorporated into the Teaching Machine. This means that if the TM is integrated into a website, the new plug-in will be incorporated automatically and that it can have its configuration controlled via the TM's standard configuration engine. All of this can be accomplished without recompiling the TM or even having access to its source code. The plug-in system is described in a separate document. The plug-in system has been built and tested.
The second piece is the incorporation of an interface into a plug-in to allow it to be made visible to the code as a library. This has been built and tested for primitive arguments only, using Java only. An extension to bridge such an interface over to C++ is planned for this year. Extension to structured data is an intermediate priority and may or may not be accomplished in 2007, depending on demand. This technology is required only for driven mode and so is not needed for the quizGenerator project.
The final requirement was to be able to import data into a
visual
plugin in order that it may be displayed - a selection system. This has
now been developed.
Summarizing, to create an instrumented display one builds a plug-in and registers it with the TM, then creates a generator by selecting a desired set of datums to monitor, then lets the evolution of the datums as the TM runs drive the display.
The diagram below shows how the plugIn fits into the TM at run-time. The TM follows the classic Model-View pattern with most of the code being either in the model or the view. In the diagram, only those parts of the TM that are relevant to a new Visualization plugin are shown (model classes in orange, view in green).
In addition there are a number of common classes, shown in magenta. In the diagram, model classes are represented only by TMBigApplet
, which is the central class in the TM, and one other block standing in for all other classes. There is a little more detail on the view side as that's where the new display is to plug in. Even so, only those classes directly related to it are shown. To see how plugins are created, see the next section.
Every display in the TM is derived from the class WorkArea
and each WorkArea
object has a related SubWindow
object which is a kind of JInternalFrame
. SubWindows
are just that, visible windows that are restricted to operate within the main TM window. Each has a single WorkArea
which is basically a single scrollPane where the drawing gets done. (Although logically it would seem that SubWindows
have WorkAreas
, the two are actually in a one-to-one relationship. From the point-of-view of displays it is more convenient to think of WorkAreas
as having a SubWindow
in which they are contained.)
A special abstract DataVisualizerAdapter
class has been created to provide
winnow()
, which provides a filtering service) but which may be over-ridden.drawArea
method which must be provided by visualizers to create the actual visualization.New visualizer plugins should be derived from the DataVisualizerAdapter
class.
The DisplayManager
is itself a plugin. Effectively, it plugs into the TMBigApplet
and all the displays plugin to it. This is to allow a different DisplayManger
to be plugged in with perhaps quite different layout stategies. Because of this layered communications, it has separate top and bottom interfaces, each of which defines a two way flow. Its interface to the displays is known as a DisplayContextInterface
because the DisplayManager
provides the context for the displays. In turn the displays are defined by a DisplayInterface
. Notice that across these two, command flow only goes one way, from DisplayManager
to Display
. The context only provides query callbacks.
From the point of view of the quizGenerator
, classes on the model side read in the source files containing examples to be run in the TM. The TM compiles the examples and then runs them. Normally running is controlled by mouse clicks but a new set of comands are being added to the ExternalCommand
interface to support autorunning which the quizGenerator
needs.
Commands for the TMBigApplet
can come from the GUI (mouse clicks and menus), from WebWriter (that is from JavaScript calls) or from the ScriptManager
. The TMBigApplet
may mediate the command streams (for example, preventing commands from the GUI while autorunning, except for stopping or rate setting).
Most interfaces in the TM are kept in a special Interfaces package, are public and thus available throughout the entire system. The ScriptManager
is a Singleton class, also available universally, as it is potentially able to script any part of the TM (presuming it makes sense to do so).
The plugin systen allows new modules to be added to the TM without recompiling the TM. Indeed, the only thing required is the tm.jar file. The disgram below shows the relevant classes and interfaces to developers of DataVisualization plugins at creation time.
Colour coding is the same as in the run-time diagram. Each plugIn in the TM has an associated plugInFactory object which exists soley to create that kind of plugIn. Thus the CodeDisplayPIFactory creates the CodeDisplay and the StoreDisplayPIFactory creates the four store display objects. Similarly a new visualizer requires an associated new visualizer factory as well. Even the DisplayManager is a plugIn, allowing us to substitute different display managers in the future or even choose between different ones.
It is recommended (though not mandatory) that new Visualizer plugIns specialize the DataVisualizerAdapter which provides a number of services common to any data visualizer (such as how to create the generator - the set of datums to be visualized).


{% extends "main.html" %} {% block maincontent %}
Hey There, I am Kaushal Gawri, a computer science student at RMIT University, Melbourne.
I am currently enrolled in cloud computing for the summer semester
This is a demonstration of how user login/logout along with authenticating the passwords stored in datastore works.
The following is the list of tasks involved for the current task:


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Buffalo Plains [ar76], plain, in Imperia, peasants: 101
Last updated Turn #139
Buffalo Plains [ar76], plain, in Imperia, peasants: 101
------------------------------------------------------------------------
28: Lanthara [r4v], Imperial Empire, duke, with 39 nazgul, arrived from
28: the west, accompanied by:
28: Manis [h3g], Imperial Empire, with 17 archers, 18 hvy. xbowmen
28: Lars the very big Guy [o4l], refugee, prisoner
29: Lanthara [r4v], Imperial Empire, duke, with 39 nazgul, went east,
29: accompanied by:
29: Manis [h3g], Imperial Empire, with 17 archers, 18 hvy. xbowmen
29: Lars the very big Guy [o4l], refugee, prisoner
Routes leaving Buffalo Plains:
North, forest, to Blackroot Wood [aq76], 8 days
East, to Ocean [ar77], The Outer Sea, 2 days
South, plain, to Buffalo Plains [as76], 7 days
West, plain, to Buffalo Plains [ar75], 7 days
Seen here:
Stack of giants [iy3l], giants, number: 17
Stack of nazgul [hi1s], nazgul, number: 3
Wild men [ga3r], savages, number: 7


%(CLUSTER_NAME)s status
%(DateTime)s
Refreshes every %(REFRESH_TIME)s seconds. !!!NOT!!!
Show node list
Show all job details
Show job list
Header always on top
Auto-refresh
%(UserSummary)s
%(QueueSummary)s
%(NodeSummary)s
%(NodeTable)s
Jobs
Job ID
Username
Queue
Jobname
Nodes
Cores
State
Elapsed Time
%(JobTable)s


Install WinChatty Notifier for Windows
Chrome/IE and Windows will pop up a lot of scary malware detection prompts since this is an unsigned installer, but you should be able to make it through. Sometimes the button to continue is hidden behind a "More information" link or a small down arrow button.
When you first install, your browser will be taken to a site where you log into your Shacknews account and then set up your notification preferences. You will need to re-launch WinChatty Notifier after this initial login in order to begin receiving notifications. You can add WinChatty Notifier to your Startup folder to launch it with Windows.
Currently only post notifications are supported. Shackmessage notifications are NOT supported.
WinChatty Notifier integrates with your web browser or with Lamp.
Coming soon!
Coming soon!


The sensor operation interface (Dedicated for TOPSENS own cameras). More...
Classes | |
| interface | PermissionListener |
| Callback interface for permission request results. More... | |
Public Member Functions | |
| void | close () |
| Closes the sensor instance. More... | |
| Error | requestPermission (PermissionListener listener) |
| Requests sensor permission. More... | |
| boolean | isRequestingPermission () |
| Checks whether sensor permission is being requested. More... | |
| boolean | hasPermission () |
| Checks whether sensor permission has been granted. More... | |
| Error | start (Resolution colorResolution, Resolution depthResolution, boolean generateUsers) |
| Starts the sensor instance. More... | |
| void | stop () |
| Stops the sensor instance. More... | |
| Error | waitColor (ColorFrame frame, int timeout) |
| Gets a color frame within a certain time limit. More... | |
| Error | waitDepth (DepthFrame frame, int timeout) |
| Gets a depth frame within a certain time limit. More... | |
| Error | waitUsers (UsersFrame frame, int timeout) |
| Gets a users frame with a certain time limit. More... | |
| Error | setOrientation (Orientation orientation) |
| Sets image orientation. More... | |
| Orientation | getOrientation () |
| Gets image orientation. More... | |
| Error | setImageFlipped (boolean flipped) |
| Sets whether the image is flipped. More... | |
| boolean | isImageFlipped () |
| Checks whether the image is flipped. More... | |
| Error | setDepthAligned (boolean aligned) |
| Sets whether the depth image is aligned with the color image. More... | |
| boolean | isDepthAligned () |
| Checks whether the depth image is aligned with the color image. More... | |
| Error | setMaskEnabled (boolean enabled) |
| Sets whether to enable user mask. More... | |
| boolean | isMaskEnabled () |
| Checks whether user mask is enabled. More... | |
| Error | setConfig (int config) |
| Sets preconfigured identity. More... | |
Static Public Member Functions | |
| static Error | initialize (Context context) |
| Initializes the sensor. More... | |
| static void | uninitialize () |
| Uninitializes sensor permission. More... | |
| static Error | preload (int[] resources) |
| Preload resource data to minimize sensor startup delay. More... | |
| static int | count () |
| Gets the count of available sensors. More... | |
| static Sensor | open (int index) |
| Opens the sensor instance. More... | |
| static Error | error () |
| Get the error code. More... | |
The sensor operation interface (Dedicated for TOPSENS own cameras).
| void close | ( | ) |
Closes the sensor instance.
|
static |
Gets the count of available sensors.
|
static |
Get the error code.
| Orientation getOrientation | ( | ) |
Gets image orientation.
| boolean hasPermission | ( | ) |
Checks whether sensor permission has been granted.
|
static |
Initializes the sensor.
| context | The context to which the running program belongs. |
| boolean isDepthAligned | ( | ) |
Checks whether the depth image is aligned with the color image.
| boolean isImageFlipped | ( | ) |
Checks whether the image is flipped.
| boolean isMaskEnabled | ( | ) |
Checks whether user mask is enabled.
| boolean isRequestingPermission | ( | ) |
Checks whether sensor permission is being requested.
|
static |
Opens the sensor instance.
| index | The index value of the sensor to use (starting from 0). |
|
static |
Preload resource data to minimize sensor startup delay.
| resources | Preloaded resource id array. |
| Error requestPermission | ( | PermissionListener | listener | ) |
Requests sensor permission.
| listener | Callback handler to process permission requesting result. |
| Error setConfig | ( | int | config | ) |
Sets preconfigured identity.
| config | Preconfigured identity. |
| Error setDepthAligned | ( | boolean | aligned | ) |
Sets whether the depth image is aligned with the color image.
| aligned | The depth image is aligned with the color image if true, otherwise not aligned. |
| Error setImageFlipped | ( | boolean | flipped | ) |
Sets whether the image is flipped.
| flipped | The image is flipped if true, otherwise not flipped. |
| Error setMaskEnabled | ( | boolean | enabled | ) |
Sets whether to enable user mask.
| enabled | Enabled if true, otherwise not enabled. |
| Error setOrientation | ( | Orientation | orientation | ) |
Sets image orientation.
| orientation | Image orientation. |
| Error start | ( | Resolution | colorResolution, |
| Resolution | depthResolution, | ||
| boolean | generateUsers | ||
| ) |
Starts the sensor instance.
| colorResolution | Color image resolution. |
| depthResolution | Depth image resolution. |
| generateUsers | Generates users if true, otherwise doesn't generate users. |
| void stop | ( | ) |
Stops the sensor instance.
|
static |
Uninitializes sensor permission.
| Error waitColor | ( | ColorFrame | frame, |
| int | timeout | ||
| ) |
Gets a color frame within a certain time limit.
| frame | color frame. |
| timeout | Waiting time limit. |
| Error waitDepth | ( | DepthFrame | frame, |
| int | timeout | ||
| ) |
Gets a depth frame within a certain time limit.
| frame | Depth frame. |
| timeout | Waiting time limit. |
| Error waitUsers | ( | UsersFrame | frame, |
| int | timeout | ||
| ) |
Gets a users frame with a certain time limit.
| frame | Users frame. |
| timeout | Waiting time limit. |


Windows 10 x64 (19041.208) 2004
PDC_ACTIVITY_TYPE
PdcNetwork = 0n0
PdcSystem = 0n1
PdcTimer = 0n2
PdcAllNetworks = 0n3
PdcAnyNetwork = 0n4
PdcInvalidActivity = 0n5
PdcMaxActivity = 0n5


You need to enable JavaScript to run Sensor Fusion!
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Amazon DynamoDB – A Complete Guide
DynamoDB is a fully managed NoSQL database service provided by Amazon. These days, databases have become the backbone for any company irrespective of how big they are. Traditional database systems which were initially used, are not the go-to solution today because of the dynamic change in requirements and type of data procured. In this Amazon DynamoDB tutorial, I will be discussing the new and fast way of storing and retrieving data using DynamoDB.
In this Amazon DynamoDB tutorial, I will be discussing the following topics:
- What Is DynamoDB?
- Terminologies Associated With DynamoDB
- Accessing Amazon DynamoDB
- Features Of DynamoDB
- DynamoDB API
- DynamoDB: Case Studies
- Demo: Creating, Inserting And Querying A Table In DynamoDB
What Is DynamoDB?
Amazon DynamoDB is a fully managed NoSQL service that works on key-value pair and other data structure documents provided by Amazon. It requires only a primary key and doesn’t require a schema to create a table. It can store any amount of data and serve any amount of traffic. With DyanmoDB, you can expect a good performance even when it scales up. It is a very simple and small API that follows key-value method to store, access and perform advanced data retrieval.
DynamoDB comprises of three fundamental units known as table, attribute, and items. A table holds a set of items, an attribute is the simplest element that stores data without any further division and item holds a set of attributes.
Now that you know what is DynamoDB, let’s move further in this Amazon DynamoDB tutorial and introduce you to the terms used here.
Terminologies Associated With DynamoDB
Here with DynamoDB, everything is kept simple, the terms used with DynamoDB are easy to understand which makes it unique from the rest of the Database services. The terms used are as follows:
- Table, Items, and Attributes
- A table can be visualized as a group of items. Taking an example of Employee records, you will have Employee Name, Employee ID, Address and Phone Number all such items will be stored in a table.
- An item is a set of attributes in a table. You can also understand an item as a set of attributes that can uniquely define your entry in a table. For example, an item in Employee records will identify a single employee.
- An attribute is a single field that is attached to an item. E.g. Employee Name.
-
Primary Key
A primary key is a unique attribute that is necessary while creating a table, it cannot be null at any given point. Hence, while inserting an item into the table, a primary key attribute is a must. E.g. Employee ID is the primary key for the table Employee records. Two items cannot have a similar primary key. DynamoDB supports two types of Primary key.
-
Simple Primary Key A simple primary key is also known as Partition key, this is basically a single attribute. DynamoDB uses Partition key’s value to distinguish items in a table. E.g. Employee ID in Employee records table.
-
Composite Primary Key A composite primary key is also known as Partition key and Sort key. This type of key is generally made up of two items. The primary component is the Partition key and the secondary component is the Sort key. E.g.* Car Details table with Brand name and Model number as a composite primary key*.
-
-
Secondary Index
A secondary index can be understood as the attribute that lets you query the data, with or without the help of a Primary key. DynamoDB has these secondary indexes that help you achieve this additional access. - DynamoDB Streams This is an additional/optional feature provided by DynamoDB to keep a track of data modification events in a table. Here, each event is represented by a stream record and if this service is enabled, then you get a new event every time when there is a new item created, an item is updated or an item is deleted.
These are the different terms used, without any further delay let’s proceed with the DynamoDB tutorial and find out how to access a table.
Accessing Amazon DynamoDB
Accessing DynamoDB is very easy and can be done using the following methods:
- Console You can access DynamoDB simply by clicking here.
- CLI(Command Line Interface) Using CLI, you can simply open your command prompt and type the relevant commands and access the table. For more details, click here.
- Using API Using AWS SDKs you can make the most of DynamoDB. AWS SDK supports a variety of languages like Java, JavaScript, .NET, Python, PHP etc. For more details, click here.
Features Of DynamoDB
DynamoDB is a NoSQL database service. DynamoDB is designed in such a way that the user can get high-performance, run scalable applications that would not be possible with the traditional database system. These additional features of DynamoDB can be seen under the following categories:
- On-demand capacity mode: The applications using the on-demand service, DynamoDB automatically scales up/down to accommodate the traffic.
- Built-in support for ACID transactions: DynamoDB provides native/ server-side support for transactions.
- On-demand backup: This feature allows you to create a complete backup of your work at any given point of time.
- Point-in-time recovery: This feature helps you with the protection of your data in case of accidental read/ write operations.
- Encryption at rest: It keeps the data encrypted even when the table is not in use. This enhances security with the help of encryption keys.
DynamoDB API
DynamoDB is a database tool and to interact with an application, it requires API. The APIs in DynamoDB are:
#### Control Plane Control Plane consists of operations responsible for “Creating” and “Managing” a DynamoDB table. The API operations that can be used are as follows:
- CreateTable: Creates a new table.
- DescribeTable: Provides information about the table.
- ListTable: Returns all the table names in your list.
- DeleteTable: Deletes the table and all its dependencies from DynamoDB.
#### Data Plane Data Plane consists of “CRUD” operation, i.e. “Create”, “Read”, “Update”, and “Delete” options to perform different actions on your table. Here in Data Plane, there are multiple operations that can be done on a table. The operations here are as follows:
- Creating Data
- PutItem: You can write a single data item to your table with the help of Primary key.
- BatchWriteItem: It is a better version of PutItem, with this you can write upto 25 items to your table.
- Reading Data
- GetItem: It retrieves a single item from a table with the help of the primary key.
- BatchGetItem: The better version of GetItem it can retrieve upto 100 items from multiple tables.
- Query: It is basically a command that retrieves an item which has a specific partition key.
- Scan: Works in a similar way as Query but doesn’t require partition key aslo it works on a specific table.
- Updating Data
- UpdateItem: It modifies a single or multiple data items in a table with the help of Primary Key.
- Deleting Data
- DeleteItem: It deletes a single item from the table with the help of Primary Key.
- BatchWriteItem: The better version of DeleteItem it can delete upto 25 items in a table.
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DynamoDB Stream DynamoDB Stream is nothing but a service used to track data stream that is loaded into a table and retrieved from a table. To modify the streaming, the user can use the following commands:
- ListStream: It gives a list of all streams.
- DescribeStream: It gives detail about the stream and the resources used.
- GetShardIterator: It gives a Shard iterator that is a data structure to store information about the stream.
- GetRecords: Using Shard iterator GetRecords retrieves information about streams.
So, now that you have a decent idea about the different APIs supported by DynamoDB. Let’s take a look at the different case studies where customers have benefited with DynamoDB.
DynamoDB: Case Studies
I have listed down the case studies of some big companies and startups, as to how they benefited using DynamoDB.
#### 1. MLB Advanced Media MLBAM said in one of their reviews about Amazon DynamoDB that it helped them to scale up the support for games on a single day, DynamoDB also helped them to power the queries and support for fast data retrieval. #### 2. Expedia Expedia’s real-time analytics application collects data for test & learn experiments. This experiment processed nearly 200 million messages daily, they stated that DynamoDB was easy to setup and the monitoring was easier and scaling was smooth and that’s the reason they moved to using DynamoDB. #### 3. Nexon Nexon stated that they used Amazon DynamoDB as their primary database for blockbuster mobile game HIT. They stated that Nexon’s HIT leveraged DynamoDB to deliver a steady latency to deliver a fantastic mobile gaming experience.
This is how the trending NoSQL database “Amazon DynamoDB” helped companies to reach the pinnacle of user experience. Let’s move further in this Amazon DynamoDB tutorial and see how to implement the different queries.
Demo: Creating, Inserting And Querying A Table In DynamoDB
Let’s find out how to create a table in DynamoDB.
Step 1: Navigate to the DynamoDB section in AWS or click here. Select “Create Table”.
Step 2: Fill in with the necessary details and click on “Create”.
Step 3: You can view your table being created. Click on “Overview” to understand your table, click on “Items” to edit, insert and query on the table. There are many more options you can use to understand your table better.
Now that you have created a table, let’s go ahead and insert a few items and understand how NoSQL works.
Step 1: Navigate to “Items” and click on “Create item”.
Step 2: It will open a JSON file where you can add different items. Click on the “+” symbol and select “Append” and select what type of data you want to enter.
Step 3: This is what it looks like after adding multiple columns to your table. Click on “Save”
Step 4: Since it is a NoSQL architecture, you can play around with the columns you add to the table. E.g. “Position”.
Step 5: This is how your table will look like once you have inserted the data.
Now that we have a table ready, let’s go ahead and look at some basic queries.
Step 1: Here you can frame your query and click on “Start Search” to get the desired result.
E.g. I am searching for all the mobile numbers that are greater than or equals to “1234”.
Step 2: Here, I am searching for the record which has EmpId as “ED4”.
This is a small tutorial on how to use DynamoDB to suffice your needs. I hope you found this Amazon DynamoDB tutorial informative.


Why are interviews conducted in the first place? You know the answer to this already. However, the purpose of the mock interview is to ensure that candidates appearing for the interview are also aware why interviews are conducted.
Share this knowledge with candidates during the mock interview to enable them to be better prepared for the actual interview. Let’s play a game to refresh your memory.
A few balloons are floating, each of which has one reason why you need to conduct an interview. Pick the right reasons by clicking on the floating balloon.
You have 30 seconds to finish this game. Click Start to begin.
Well done! You have identified all the reasons for conducting the interview correctly.
You can click Play Again if you want to play the game one more time or click Continue to learn more interviewing skills.
Uh-oh! Looks like you missed a few reasons or picked the wrong reasons.
Imagine if you were interviewing the candidate for the wrong reasons. The impact is significant not just on your performance, but also the entire organization’s performance and credibility and on the candidate as well.
You may wish to Play Again, or select Continue to reinforce your knowledge on interviewing basics.


You can use this command to generate a self-signed key/cert pair:
openssl req -x509 -sha256 -nodes -days 3650 -newkey rsa:4096 -keyout /etc/ssl/rippled/rippled.key -out /etc/ssl/rippled/rippled.crt
Keep your key private:
chown -R rippled:rippled /etc/ssl/rippled && chmod -R 500 /etc/ssl/ripple
On RHEL/CentOS you might have to run:
restorecon -FvR /etc/ssl/rippled
to change the selinux user to system_u.