void goSleep(void)
{
setSensorDevPwr(DEV_PWR_OFF);
setSysWakeUpLed(LED_OFF);
setSysStsLed(LED_OFF);
setTestPassLed(LED_OFF);
setTestFailLed(LED_OFF);
int adcVolBat = 0;
do
{
HAL_SuspendTick();
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFE);
HAL_ResumeTick();
adcVolBat = readAdcChannel(ADC_CHANNEL_7);
if (adcVolBat < (0x0400))
{
setSysStsLed(LED_ON);
HAL_Delay(10);
setSysStsLed(LED_OFF);
HAL_Delay(200);
setSysStsLed(LED_ON);
HAL_Delay(10);
setSysStsLed(LED_OFF);
}
} while (adcVolBat < (0x0400));
}
int dacOutAdcIn(int dacValue, uint32_t adcChannel)
{
HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, dacValue);
HAL_Delay(DAC_OUT_TO_ADC_IN_DELAY); // ms
int adcValue = readAdcChannel(adcChannel);
HAL_DAC_Stop(&hdac, DAC_CHANNEL_1);
return adcValue;
}
/*
* There are the two seperate channels on the sensor, that detect the light.
* Ch1 detects only the infrarated light spectrum and ch0 detects the visible and the infrarated light spectrum.
* To calibrate the sensor to the human seeable light spectrum, ch1 will be subtracted from ch0.
* */
unsigned long read_intensity() {
long ch0 = readAdcChannel(CHANNEL0_LOW_BYTE_ADDRESS,
CHANNEL0_HIGH_BYTE_ADDRESS);
long ch1 = readAdcChannel(CHANNEL1_LOW_BYTE_ADDRESS,
CHANNEL1_HIGH_BYTE_ADDRESS);
unsigned long ratio1 = 0;
data = 0;
// calculate ratio and scale to 512 (2^9)
if (ch0 != 0) {
ratio1 = (ch1 << (RATIO_SCALE + 1)) / ch0;
}
// round ratio value
unsigned long ratio = (ratio1 + 1) >> 1;
/* transform to LUX (p. 23) */
// FN package
unsigned int b, m;
if (ratio >= 0 && ratio <= K1T) {
b = B1T;
m = M1T;
} else if (ratio <= K2T) {
b = B2T;
m = M2T;
} else if (ratio <= K3T) {
b = B3T;
m = M3T;
} else if (ratio <= K4T) {
b = B4T;
m = M4T;
} else if (ratio <= K5T) {
b = B5T;
m = M5T;
} else if (ratio <= K6T) {
b = B6T;
m = M6T;
} else if (ratio <= K7T) {
b = B7T;
m = M7T;
} else if (ratio <= K8T) {
b = B8T;
m = M8T;
}
unsigned long temp = (ch0 * b) - (ch1 * m);
// avoid negativ LUX values
if(temp < 0){
temp = 0;
}
// round the LSB (2^LUX-SCALE-1)
temp += (1 << LUX_SCALE-1);
// cut the rest
unsigned long lux = temp >> LUX_SCALE;
return lux;
}
