ambient light: make three measurements

[bike-lights.git] / firmware / adc.c

diff --git a/firmware/adc.c b/firmware/adc.c
index f5d846f2b21d0340bd8f3411a1d214db5ae04583..4213ef56bc01b5114ee2c76f6ef16dfce1e7158d 100644 (file)
--- a/firmware/adc.c
+++ b/firmware/adc.c
@@ -33,7 +33,7 @@ static void inline setup_mux(unsigned char n)
                break;
        case 3: // ambient light: 1.1V, ADC5 (PA6), single-ended
                ADMUX = _BV(REFS1) | _BV(MUX2) | _BV(MUX0);
-               sum_shift = 0; // 1 measurement
+               sum_shift = 3; // 3 measurements
                break;
        case 4: // batt voltage: 1.1V, ADC6 (PA7), single-ended
                ADMUX = _BV(REFS1) | _BV(MUX2) | _BV(MUX1);
@@ -146,7 +146,7 @@ ISR(ADC_vect) { // IRQ handler
        if (current_adc < N_PWMLEDS)
                pwmled_adc(current_adc, adc_sum);
        if (current_adc == AMBIENT_ADC)
-               ambient_adc(adcval);
+               ambient_adc(adc_sum);
        if (current_adc == BATTERY_ADC)
                battery_adc(adcval);