diff options
Diffstat (limited to 'arch/attiny1616.h')
| -rw-r--r-- | arch/attiny1616.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/attiny1616.h b/arch/attiny1616.h index 57b0023..940973e 100644 --- a/arch/attiny1616.h +++ b/arch/attiny1616.h @@ -18,6 +18,8 @@ inline void mcu_clock_speed(); // this should work, but needs further validation inline void clock_prescale_set(uint8_t n); +// TODO: allow hwdef to define a base clock speed, +// and adjust these values accordingly typedef enum { // Actual clock is 20 MHz, but assume that 10 MHz is the top speed and work from there @@ -34,8 +36,30 @@ typedef enum } clock_div_t; +////////// DAC controls ////////// + +#define DAC_LVL DAC0.DATA // 0 to 255, for 0V to Vref +#define DAC_VREF VREF.CTRLA // 0.55V, 1.1V, 1.5V, 2.5V, or 4.3V + +// set only the relevant bits of the Vref register +#define mcu_set_dac_vref(x) \ + VREF.CTRLA = x | (VREF.CTRLA & (~VREF_DAC0REFSEL_gm)); + +// Vref values +// (for the DAC bits, not the ADC bits) +#define V05 V055 +#define V055 VREF_DAC0REFSEL_0V55_gc +#define V11 VREF_DAC0REFSEL_1V1_gc +#define V25 VREF_DAC0REFSEL_2V5_gc +#define V43 VREF_DAC0REFSEL_4V34_gc +#define V15 VREF_DAC0REFSEL_1V5_gc + ////////// ADC voltage / temperature ////////// +// set only the relevant bits of the Vref register +#define mcu_set_adc0_vref(x) \ + VREF.CTRLA = x | (VREF.CTRLA & (~VREF_ADC0REFSEL_gm)); + #define hwdef_set_admux_therm mcu_set_admux_therm inline void mcu_set_admux_therm(); |