unsigned int Complete(void)
{
unsigned int result = AdcCountsToBatteryVoltage(AdcConversion<input, channel>::ReadADC());
BATTERY_SENSE_DISABLE();
if (QueryCalibrationValid())
result += GetBatteryCalibrationValue();
Average.AddSample(result);
return result;
}
/* 80 us
*
* conversion time = 13 * ADC12DIV * 1/FreqAdcClock
* 13 * 8 * 1/5e6 = 20.8 us
*/
void BatterySenseCycle(void)
{
static unsigned char Index = 0;
xSemaphoreTake(AdcMutex, portMAX_DELAY);
BATTERY_SENSE_ENABLE();
ENABLE_REFERENCE();
/* low_bat_en assertion to bat_sense valid is ~100 ns */
/* Start battery sense conversion */
AdcCheck();
CLEAR_START_ADDR();
ADC12CTL1 |= ADC12CSTARTADD_1;
ENABLE_ADC();
WaitForAdcBusy();
/* Convert the ADC count for the battery input into a voltage
* ADC12MEM1: Counts Battery Voltage in ADC counts
* Result: Battery voltage in millivolts */
unsigned int Value = (unsigned int)(CONVERSION_FACTOR_BATTERY * (double)ADC12MEM1);
if (ValidCalibration()) Value += GetBatteryCalibrationValue();
/* smoothing algorithm: cut extreme values (gap > 20) */
unsigned char Prev = (Index == 0) ? MAX_SAMPLES - 1: Index - 1;
if (Sample[BATTERY][Prev])
{
int Gap = Value - Sample[BATTERY][Prev];
if (Charging())
{
if (Gap > GAP_BIG) Gap = GAP_BIG;
else if (Gap < GAP_SMALL_NEGATIVE) Gap = GAP_SMALL_NEGATIVE;
}
else
{
if (Gap > GAP_SMALL) Gap = GAP_SMALL;
else if (Gap < GAP_BIG_NEGATIVE) Gap = GAP_BIG_NEGATIVE;
}
Sample[BATTERY][Index] = Sample[BATTERY][Prev] + Gap;
}
else Sample[BATTERY][Index] = Value;
if (++Index >= MAX_SAMPLES) Index = 0;
BATTERY_SENSE_DISABLE();
EndAdcCycle(); //xSemaphoreGive()
}