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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Driver for MAX44006 RGB, IR, and Temperature Sensor.
* Does not support interrupts.
*/
#include "driver/max44006.h"
#if defined(CONFIG_meta_driver_hardware_i2c)
#include "driver/i2c.h"
#elif defined(CONFIG_driver_softi2c)
#include "driver/soft_i2c.h"
#endif
#include "arch.h"
uint8_t MAX44006::init()
{
txbuf[0] = interruptStatusReg;
if (i2c.xmit(address, 1, txbuf, 1, rxbuf) != 0) {
return 1;
}
if (rxbuf[0] & ~PWRON) {
// reset sensor
txbuf[1] = 0x10;
if (i2c.xmit(address, 2, txbuf, 0, rxbuf) != 0) {
return 1;
}
arch.delay_ms(200);
if (i2c.xmit(address, 1, txbuf, 1, rxbuf) != 0) {
return 1;
}
if (rxbuf[0] & ~PWRON) {
return 2;
}
}
txbuf[0] = ambientConfigReg;
txbuf[1] = ambientConfig;
if (i2c.xmit(address, 2, txbuf, 0, rxbuf) != 0) {
return 1;
}
txbuf[0] = mainConfigReg;
txbuf[1] = MODE_10; // MODE = 10 -> Clear + RGB + IR measurement
if (i2c.xmit(address, 2, txbuf, 0, rxbuf) != 0) {
return 1;
}
return 0;
}
uint16_t MAX44006::getTemperature()
{
txbuf[0] = 0x12;
if (i2c.xmit(address, 1, txbuf, 2, rxbuf) != 0) {
return 0;
}
/*
* 13543 counts @ ~21c
* 13660 counts @ ~30c
* 14280 counts @ ~48c
* -> approx 27 counts / degc
* -> approx 12970 counts @ 0c
*/
// independent of AMBPGA setting, depends on AMBTIM
return (((uint16_t)rxbuf[0] << 8) + rxbuf[1]);
}
bool MAX44006::getLight(float *red, float *green, float *blue, float *clear, float *ir)
{
txbuf[0] = 0x04;
if (i2c.xmit(address, 1, txbuf, 10, rxbuf) != 0) {
return false;
}
float multiplier = 0.002;
if ((ambientConfig & AMBPGA_MASK) == AMBPGA_01) {
multiplier = 0.008;
}
else if ((ambientConfig & AMBPGA_MASK) == AMBPGA_10) {
multiplier = 0.032;
}
else if ((ambientConfig & AMBPGA_MASK) == AMBPGA_11) {
multiplier = 0.512;
}
if ((ambientConfig & AMBTIM_MASK) == AMBTIM_001) {
multiplier *= 4;
}
else if ((ambientConfig & AMBTIM_MASK) == AMBTIM_010) {
multiplier *= 16;
}
else if ((ambientConfig & AMBTIM_MASK) == AMBTIM_011) {
multiplier *= 64;
}
else if ((ambientConfig & AMBTIM_MASK) == AMBTIM_100) {
multiplier *= 0.25;
}
*clear = (float)(((uint16_t)rxbuf[0] << 8) + rxbuf[1]) * multiplier;
*red = (float)(((uint16_t)rxbuf[2] << 8) + rxbuf[3]) * multiplier;
*green = (float)(((uint16_t)rxbuf[4] << 8) + rxbuf[5]) * multiplier;
*blue = (float)(((uint16_t)rxbuf[6] << 8) + rxbuf[7]) * multiplier * 2;
*ir = (float)(((uint16_t)rxbuf[8] << 8) + rxbuf[9]) * multiplier;
return true;
}
MAX44006 max44006(0x45);
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