diff options
Diffstat (limited to 'hw/thefreeman/lin16dac/hwdef.h')
| -rw-r--r-- | hw/thefreeman/lin16dac/hwdef.h | 33 |
1 files changed, 11 insertions, 22 deletions
diff --git a/hw/thefreeman/lin16dac/hwdef.h b/hw/thefreeman/lin16dac/hwdef.h index dc4377a..a68d9c2 100644 --- a/hw/thefreeman/lin16dac/hwdef.h +++ b/hw/thefreeman/lin16dac/hwdef.h @@ -32,24 +32,16 @@ enum CHANNEL_MODES { #define CHANNEL_MODES_ENABLED 0b0000000000000001 -#define PWM_CHANNELS 1 // old, remove this - #define PWM_BITS 8 // 8-bit DAC -#define PWM_GET PWM_GET8 #define PWM_DATATYPE uint8_t #define PWM_DATATYPE2 uint16_t // only needs 32-bit if ramp values go over 255 #define PWM1_DATATYPE uint8_t // main LED ramp +#define PWM1_GET(l) PWM_GET8(pwm1_levels, l) +#define PWM2_DATATYPE uint8_t // DAC Vref table +#define PWM2_GET(l) PWM_GET8(pwm2_levels, l) // main LED outputs -#define DAC_LVL DAC0.DATA // 0 to 255, for 0V to Vref -#define DAC_VREF VREF.CTRLA // 0.55V or 2.5V -#define PWM_TOP_INIT 255 // highest value used in top half of ramp (unused?) -// Vref values -#define V055 16 -#define V11 17 -#define V25 18 -#define V43 19 -#define V15 20 +// (DAC_LVL + DAC_VREF + Vref values are defined in arch/*.h) // Opamp enable // For turning on and off the op-amp @@ -84,11 +76,9 @@ enum CHANNEL_MODES { inline void hwdef_setup() { - // set up the system clock to run at 10 MHz instead of the default 3.33 MHz - // (it'll get underclocked to 2.5 MHz later) - // TODO: maybe run even slower? - _PROTECTED_WRITE( CLKCTRL.MCLKCTRLB, - CLKCTRL_PDIV_2X_gc | CLKCTRL_PEN_bm ); + // TODO: for this DAC controlled-light, try to decrease the clock speed + // to reduce overall system power + mcu_clock_speed(); VPORTA.DIR = PIN6_bm // DAC | PIN7_bm; // Opamp @@ -121,11 +111,10 @@ inline void hwdef_setup() { // set up the DAC // https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny1614-16-17-DataSheet-DS40002204A.pdf // DAC ranges from 0V to (255 * Vref) / 256 - // also VREF_DAC0REFSEL_0V55_gc and VREF_DAC0REFSEL_1V1_gc and VREF_DAC0REFSEL_2V5_gc - VREF.CTRLA |= VREF_DAC0REFSEL_2V5_gc; - VREF.CTRLB |= VREF_DAC0REFEN_bm; - DAC0.CTRLA = DAC_ENABLE_bm | DAC_OUTEN_bm; - DAC0.DATA = 255; // set the output voltage + mcu_set_dac_vref(V05); // boot at lowest Vref setting + VREF.CTRLB |= VREF_DAC0REFEN_bm; // enable DAC Vref + DAC0.CTRLA = DAC_ENABLE_bm | DAC_OUTEN_bm; // enable DAC + DAC_LVL = 0; // turn off output at boot } |