r4/arduino-spybug
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rename U8 amplify option and comment out by default

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r4 2022-04-17 10:47:48 +02:00
parent bfa80a629e
commit fe6734dcba
1 changed files with 3 additions and 3 deletions
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6
spybug/spybug.ino
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@ -50,7 +50,7 @@
//#define ADC_PRESCALE_32 /* Up to ~27kHz. */
#define ADC_PRESCALE_64 /* Up to ~18kHz. */
#define U8_EXTRA_PRECISION /* (U8 sampling mode only) use 9th ADC reading bit and chop off 1st bit for more precision (sacrificing half of the bandwidth) */
//#define U8_AMPLIFY_X2 /* (U8 sampling mode only) amplify audio by factor 2. */
#define RECORDING_DELAY_IN_MINUTES 0 /* Wait n minutes before starting to record. */
#define ADC_CHANNEL AdcChannel0
@ -197,7 +197,7 @@ ISR(TIMER1_COMPA_vect) {
ISR(TIMER1_COMPB_vect) {
// Retrieve ADC Value and Write to Buffer
#if defined(SAMPLE_MODE_U8)
#ifdef U8_EXTRA_PRECISION
#ifdef U8_AMPLIFY_X2
uint8_t l = ADCL; /* Read ADC registers. (Order matters!) */
uint8_t h = ADCH;
uint8_t adcval = (h << 7) | (l >> 1);
@ -323,7 +323,7 @@ void setup() {
#endif
ADCSRB = _BV(ADTS2) | _BV(ADTS0); /* Auto-trigger source select: "Timer/Counter1 Compare Match B". */
ADMUX = _BV(REFS0) /* Use AREF pin (VCC by default) as reference voltage. */
#if defined(SAMPLE_MODE_U8) && !defined(U8_EXTRA_PRECISION)
#if defined(SAMPLE_MODE_U8) && !defined(U8_AMPLIFY_X2)
| _BV(ADLAR) /* Left adjust ADC output so we only need to read ADCH. */
#endif
| (0xF & ADC_CHANNEL); /* Select our ADC input channel. */