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Merge pull request #16 from jhbruhn/feature/photo_fix_overflow

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Fix ADC Overflow with dark environment
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rbaron 2021-09-30 18:18:09 +02:00 • committed by GitHub
commit 16d1a21433
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1 changed files with 6 additions and 1 deletions
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7
code/b-parasite/src/prst/adc.c
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@ -134,6 +134,11 @@ prst_adc_soil_moisture_t prst_adc_soil_read(double battery_voltage) {
prst_adc_photo_sensor_t prst_adc_photo_read(double battery_voltage) {
nrf_saadc_value_t raw_photo_output =
sample_adc_channel(PRST_ADC_PHOTO_CHANNEL);
if (raw_photo_output < 0) {
raw_photo_output = 0;
}
prst_adc_photo_sensor_t ret;
ret.raw = raw_photo_output;
ret.voltage = (3.6 * raw_photo_output) / (1 << PRST_ADC_RESOLUTION);
@ -161,4 +166,4 @@ prst_adc_photo_sensor_t prst_adc_photo_read(double battery_voltage) {
ret.brightness);
#endif
return ret;
}
}