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Audio AMP code updated for Photon
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| /*************************************************** | |
| This is a library for the Adafruit TPA2016D2 Class D Amplifier Breakout | |
| Pick one up today in the adafruit shop! | |
| ------> http://www.adafruit.com/products/1712 | |
| This amplifier uses I2C to communicate, 2 pins are required to interface | |
| Check out the links above for our tutorials and wiring diagrams | |
| Adafruit invests time and resources providing this open source code, | |
| please support Adafruit and open-source hardware by purchasing | |
| products from Adafruit! | |
| Written by Limor Fried/Ladyada for Adafruit Industries. | |
| BSD license, all text above must be included in any redistribution | |
| ****************************************************/ | |
| #include "application.h" | |
| #include <Adafruit_TPA2016.h> | |
| Adafruit_TPA2016::Adafruit_TPA2016(void) { | |
| } | |
| boolean Adafruit_TPA2016::begin() { | |
| Wire.begin(); | |
| return true; | |
| } | |
| // Set the gain in dB! | |
| void Adafruit_TPA2016::setGain(int8_t g) { | |
| if (g > 30) g = 30; | |
| if (g < -28) g = -28; | |
| write8(TPA2016_GAIN, g); | |
| } | |
| // for querying the gain, returns in dB | |
| int8_t Adafruit_TPA2016::getGain(void) { | |
| return read8(TPA2016_GAIN); | |
| } | |
| // Turn on/off right and left channels | |
| void Adafruit_TPA2016::enableChannel(boolean r, boolean l) { | |
| uint8_t setup = read8(TPA2016_SETUP); | |
| if (r) | |
| setup |= TPA2016_SETUP_R_EN; | |
| else | |
| setup &= ~TPA2016_SETUP_R_EN; | |
| if (l) | |
| setup |= TPA2016_SETUP_L_EN; | |
| else | |
| setup &= ~TPA2016_SETUP_L_EN; | |
| write8(TPA2016_SETUP, setup); | |
| } | |
| // Set to OFF, 1:2, 1:4 or 1:8 | |
| void Adafruit_TPA2016::setAGCCompression(uint8_t x) { | |
| if (x > 3) return; // only 2 bits! | |
| uint8_t agc = read8(TPA2016_AGC); | |
| agc &= ~(0x03); // mask off bottom 2 bits | |
| agc |= x; // set the compression ratio. | |
| write8(TPA2016_AGC, agc); | |
| } | |
| void Adafruit_TPA2016::setReleaseControl(uint8_t release) { | |
| if (release > 0x3F) return; // only 6 bits! | |
| write8(TPA2016_REL, release); | |
| } | |
| void Adafruit_TPA2016::setAttackControl(uint8_t attack) { | |
| if (attack > 0x3F) return; // only 6 bits! | |
| write8(TPA2016_ATK, attack); | |
| } | |
| void Adafruit_TPA2016::setHoldControl(uint8_t hold) { | |
| if (hold > 0x3F) return; // only 6 bits! | |
| write8(TPA2016_HOLD, hold); | |
| } | |
| // Turn on power limiter | |
| void Adafruit_TPA2016::setLimitLevelOn(void) { | |
| uint8_t agc = read8(TPA2016_AGCLIMIT); | |
| agc &= ~(0x80); // mask off top bit | |
| write8(TPA2016_AGCLIMIT, agc); | |
| } | |
| // Turn off power limiter | |
| void Adafruit_TPA2016::setLimitLevelOff(void) { | |
| uint8_t agc = read8(TPA2016_AGCLIMIT); | |
| agc |= 0x80; // turn on top bit | |
| write8(TPA2016_AGCLIMIT, agc); | |
| } | |
| // Set limit levels | |
| void Adafruit_TPA2016::setLimitLevel(uint8_t limit) { | |
| if (limit > 31) return; | |
| uint8_t agc = read8(TPA2016_AGCLIMIT); | |
| agc &= ~(0x1F); // mask off bottom 5 bits | |
| agc |= limit; // set the limit level. | |
| write8(TPA2016_AGCLIMIT, agc); | |
| } | |
| void Adafruit_TPA2016::setAGCMaxGain(uint8_t x) { | |
| if (x > 12) return; // max gain max is 12 (30dB) | |
| uint8_t agc = read8(TPA2016_AGC); | |
| agc &= ~(0xF0); // mask off top 4 bits | |
| agc |= (x << 4); // set the max gain | |
| write8(TPA2016_AGC, agc); | |
| } | |
| /************************************************************************/ | |
| // Read 1 byte from the i2c bus at 'address' | |
| uint8_t Adafruit_TPA2016::read8(uint8_t address) | |
| { | |
| Wire.beginTransmission(TPA2016_I2CADDR); | |
| Wire.write(address); | |
| Wire.endTransmission(); | |
| Wire.requestFrom(TPA2016_I2CADDR, 1); | |
| while(!Wire.available()); | |
| return Wire.read(); | |
| } | |
| // write 1 byte | |
| void Adafruit_TPA2016::write8(uint8_t address, uint8_t data) | |
| { | |
| Wire.beginTransmission(TPA2016_I2CADDR); | |
| Wire.write(address); | |
| Wire.write(data); | |
| Wire.endTransmission(); | |
| } |
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