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#include "Adafruit_AMG88xx.h"
bool Adafruit_AMG88xx::begin(uint8_t addr)
{
_i2caddr = addr;
_i2c_init();
//enter normal mode
_pctl.PCTL = AMG88xx_NORMAL_MODE;
write8(AMG88xx_PCTL, _pctl.get());
//software reset
_rst.RST = AMG88xx_INITIAL_RESET;
write8(AMG88xx_RST, _rst.get());
//disable interrupts by default
disableInterrupt();
//set to 10 FPS
_fpsc.FPS = AMG88xx_FPS_10;
write8(AMG88xx_FPSC, _fpsc.get());
return true;
}
void Adafruit_AMG88xx::setMovingAverageMode(bool mode)
{
_ave.MAMOD = mode;
write8(AMG88xx_AVE, _ave.get());
}
void Adafruit_AMG88xx::setInterruptLevels(float high, float low)
{
setInterruptLevels(high, low, high * .95);
}
void Adafruit_AMG88xx::setInterruptLevels(float high, float low, float hysteresis)
{
int highConv = high / AMG88xx_PIXEL_TEMP_CONVERSION;
highConv = constrain(highConv, -4095, 4095);
_inthl.INT_LVL_H = highConv & 0xFF;
_inthh.INT_LVL_H = (highConv & 0xF) >> 4;
this->write8(AMG88xx_INTHL, _inthl.get());
this->write8(AMG88xx_INTHH, _inthh.get());
int lowConv = low / AMG88xx_PIXEL_TEMP_CONVERSION;
lowConv = constrain(lowConv, -4095, 4095);
_intll.INT_LVL_L = lowConv & 0xFF;
_intlh.INT_LVL_L = (lowConv & 0xF) >> 4;
this->write8(AMG88xx_INTLL, _intll.get());
this->write8(AMG88xx_INTLH, _intlh.get());
int hysConv = hysteresis / AMG88xx_PIXEL_TEMP_CONVERSION;
hysConv = constrain(hysConv, -4095, 4095);
_ihysl.INT_HYS = hysConv & 0xFF;
_ihysh.INT_HYS = (hysConv & 0xF) >> 4;
this->write8(AMG88xx_IHYSL, _ihysl.get());
this->write8(AMG88xx_IHYSH, _ihysh.get());
}
void Adafruit_AMG88xx::enableInterrupt()
{
_intc.INTEN = 1;
this->write8(AMG88xx_INTC, _intc.get());
}
void Adafruit_AMG88xx::disableInterrupt()
{
_intc.INTEN = 0;
this->write8(AMG88xx_INTC, _intc.get());
}
void Adafruit_AMG88xx::setInterruptMode(uint8_t mode)
{
_intc.INTMOD = mode;
this->write8(AMG88xx_INTC, _intc.get());
}
void Adafruit_AMG88xx::getInterrupt(uint8_t *buf, uint8_t size)
{
uint8_t bytesToRead = min(size, 8);
this->read(AMG88xx_INT_OFFSET, buf, bytesToRead);
}
void Adafruit_AMG88xx::clearInterrupt()
{
_rst.RST = AMG88xx_FLAG_RESET;
write8(AMG88xx_RST, _rst.get());
}
float Adafruit_AMG88xx::readThermistor()
{
uint8_t raw[2];
this->read(AMG88xx_TTHL, raw, 2);
uint16_t recast = ((uint16_t)raw[1] << 8) | ((uint16_t)raw[0]);
return signedMag12ToFloat(recast) * AMG88xx_THERMISTOR_CONVERSION;
}
void Adafruit_AMG88xx::readPixels(float *buf, uint8_t size)
{
uint16_t recast;
float converted;
uint8_t bytesToRead = min(size << 1, AMG88xx_PIXEL_ARRAY_SIZE << 1);
uint8_t rawArray[bytesToRead];
this->read(AMG88xx_PIXEL_OFFSET, rawArray, bytesToRead);
for(int i=0; i<size; i++){
uint8_t pos = i << 1;
recast = ((uint16_t)rawArray[pos + 1] << 8) | ((uint16_t)rawArray[pos]);
converted = signedMag12ToFloat(recast) * AMG88xx_PIXEL_TEMP_CONVERSION;
buf[i] = converted;
}
}
void Adafruit_AMG88xx::write8(byte reg, byte value)
{
this->write(reg, &value, 1);
}
uint8_t Adafruit_AMG88xx::read8(byte reg)
{
uint8_t ret;
this->read(reg, &ret, 1);
return ret;
}
void Adafruit_AMG88xx::_i2c_init()
{
Wire.begin();
}
void Adafruit_AMG88xx::read(uint8_t reg, uint8_t *buf, uint8_t num)
{
uint8_t value;
uint8_t pos = 0;
//on arduino we need to read in 32 byte chunks
while(pos < num){
uint8_t read_now = min(32, num - pos);
Wire.beginTransmission((uint8_t)_i2caddr);
Wire.write((uint8_t)reg + pos);
Wire.endTransmission();
Wire.requestFrom((uint8_t)_i2caddr, read_now);
for(int i=0; i<read_now; i++){
buf[pos] = Wire.read();
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