HCoop / jackhill / qmk / firmware.git / blame
| Commit | Line | Data |
|---|---|---|
| f7bca5c4 JH |
1 | #ifndef _analog_h_included__ |
| 2 | #define _analog_h_included__ | |
| 3 | ||
| 4 | #include <stdint.h> | |
| 5 | ||
| 6 | void analogReference(uint8_t mode); | |
| 7 | int16_t analogRead(uint8_t pin); | |
| 8 | int16_t adc_read(uint8_t mux); | |
| 9 | ||
| 10 | #define ADC_REF_POWER (1<<REFS0) | |
| 11 | #define ADC_REF_INTERNAL ((1<<REFS1) | (1<<REFS0)) | |
| 12 | #define ADC_REF_EXTERNAL (0) | |
| 13 | ||
| 14 | // These prescaler values are for high speed mode, ADHSM = 1 | |
| 15 | #if F_CPU == 16000000L | |
| 16 | #define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS1)) | |
| 17 | #elif F_CPU == 8000000L | |
| 18 | #define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS0)) | |
| 19 | #elif F_CPU == 4000000L | |
| 20 | #define ADC_PRESCALER ((1<<ADPS2)) | |
| 21 | #elif F_CPU == 2000000L | |
| 22 | #define ADC_PRESCALER ((1<<ADPS1) | (1<<ADPS0)) | |
| 23 | #elif F_CPU == 1000000L | |
| 24 | #define ADC_PRESCALER ((1<<ADPS1)) | |
| 25 | #else | |
| 26 | #define ADC_PRESCALER ((1<<ADPS0)) | |
| 27 | #endif | |
| 28 | ||
| 29 | // some avr-libc versions do not properly define ADHSM | |
| 30 | #if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) | |
| 31 | #if !defined(ADHSM) | |
| 32 | #define ADHSM (7) | |
| 33 | #endif | |
| 34 | #endif | |
| 35 | ||
| 36 | #endif |