diff options
Diffstat (limited to 'spaghetti-monster/fsm-adc.c')
| -rw-r--r-- | spaghetti-monster/fsm-adc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/spaghetti-monster/fsm-adc.c b/spaghetti-monster/fsm-adc.c index 0b79767..a196b7b 100644 --- a/spaghetti-monster/fsm-adc.c +++ b/spaghetti-monster/fsm-adc.c @@ -12,6 +12,8 @@ #define ADMUX_THERM ADMUX_THERM_EXTERNAL_SENSOR #endif +#include <avr/sleep.h> + static inline void set_admux_therm() { #if (ATTINY == 1634) @@ -70,6 +72,29 @@ inline void set_admux_voltage() { ADC_start_measurement(); } + +#ifdef TICK_DURING_STANDBY +inline void adc_sleep_mode() { + // needs a special sleep mode to get accurate measurements quickly + // ... full power-down ends up using more power overall, and causes + // some weird issues when the MCU doesn't stay awake enough cycles + // to complete a reading + #ifdef SLEEP_MODE_ADC + // attiny1634 + set_sleep_mode(SLEEP_MODE_ADC); + #elif defined(AVRXMEGA3) // ATTINY816, 817, etc + // set the RUNSTDBY bit so ADC will run in standby mode + ADC0.CTRLA |= 1; + // set a INITDLY value because the AVR manual says so + // (section 30.3.5) + ADC0.CTRLD |= (1 << 5); + set_sleep_mode(SLEEP_MODE_STANDBY); + #else + #error No ADC sleep mode defined for this hardware. + #endif +} +#endif + inline void ADC_start_measurement() { #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85) || (ATTINY == 841) || (ATTINY == 1634) ADCSRA |= (1 << ADSC) | (1 << ADIE); |