diff options
| -rw-r--r-- | ports/samd/Makefile | 2 | ||||
| -rw-r--r-- | ports/samd/machine_dac.c | 162 | ||||
| -rw-r--r-- | ports/samd/modmachine.c | 1 | ||||
| -rw-r--r-- | ports/samd/modmachine.h | 1 | ||||
| -rw-r--r-- | ports/samd/pin_af.h | 1 |
5 files changed, 167 insertions, 0 deletions
diff --git a/ports/samd/Makefile b/ports/samd/Makefile index 71a902a0a..43b6a1adc 100644 --- a/ports/samd/Makefile +++ b/ports/samd/Makefile @@ -91,6 +91,7 @@ SRC_C = \ clock_config.c \ help.c \ machine_adc.c \ + machine_dac.c \ machine_i2c.c \ machine_led.c \ machine_pin.c \ @@ -149,6 +150,7 @@ endif # List of sources for qstr extraction SRC_QSTR += \ machine_adc.c \ + machine_dac.c \ machine_i2c.c \ machine_led.c \ machine_pin.c \ diff --git a/ports/samd/machine_dac.c b/ports/samd/machine_dac.c new file mode 100644 index 000000000..41c6784cc --- /dev/null +++ b/ports/samd/machine_dac.c @@ -0,0 +1,162 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2017 Nick Moore + * Copyright (c) 2022 Robert Hammelrath + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <stdint.h> +#include "py/obj.h" +#include "py/runtime.h" +#include "py/mphal.h" + +#include "sam.h" +#include "pin_af.h" +#include "modmachine.h" + +typedef struct _dac_obj_t { + mp_obj_base_t base; + uint8_t id; + mp_hal_pin_obj_t gpio_id; +} dac_obj_t; + +STATIC const dac_obj_t dac_obj[] = { + #if defined(MCU_SAMD21) + {{&machine_dac_type}, 0, PIN_PA02}, + #elif defined(MCU_SAMD51) + {{&machine_dac_type}, 0, PIN_PA02}, + {{&machine_dac_type}, 1, PIN_PA05}, + #endif +}; +Dac *const dac_bases[] = DAC_INSTS; + +#if defined(MCU_SAMD21) +#define MAX_DAC_VALUE (1023) +#elif defined(MCU_SAMD51) +#define MAX_DAC_VALUE (4095) +static bool dac_init = false; +#endif + + +STATIC mp_obj_t dac_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, + const mp_obj_t *args) { + + mp_arg_check_num(n_args, n_kw, 1, 1, true); + uint8_t id = mp_obj_get_int(args[0]); + const dac_obj_t *self = NULL; + if (0 <= id && id <= MP_ARRAY_SIZE(dac_obj)) { + self = &dac_obj[id]; + } else { + mp_raise_ValueError(MP_ERROR_TEXT("invalid Pin for DAC")); + } + + Dac *dac = dac_bases[0]; // Just one DAC + + // Init DAC + #if defined(MCU_SAMD21) + + // Configuration SAMD21 + // Enable APBC clocks and PCHCTRL clocks; GCLK3 at 1 MHz + PM->APBCMASK.reg |= PM_APBCMASK_DAC; + GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK3 | GCLK_CLKCTRL_ID_DAC; + while (GCLK->STATUS.bit.SYNCBUSY) { + } + // Reset DAC registers + dac->CTRLA.bit.SWRST = 1; + while (dac->CTRLA.bit.SWRST) { + } + dac->CTRLB.reg = DAC_CTRLB_EOEN | DAC_CTRLB_REFSEL(DAC_CTRLB_REFSEL_AVCC_Val); + // Enable DAC and wait to be ready + dac->CTRLA.bit.ENABLE = 1; + while (dac->STATUS.bit.SYNCBUSY) { + } + + #elif defined(MCU_SAMD51) + + // Configuration SAMD51 + // Enable APBD clocks and PCHCTRL clocks; GCLK3 at 8 MHz + if (!dac_init) { + dac_init = true; + MCLK->APBDMASK.reg |= MCLK_APBDMASK_DAC; + GCLK->PCHCTRL[DAC_GCLK_ID].reg = GCLK_PCHCTRL_GEN_GCLK3 | GCLK_PCHCTRL_CHEN; + + // Reset DAC registers + dac->CTRLA.bit.SWRST = 1; + while (dac->CTRLA.bit.SWRST) { + } + dac->CTRLB.reg = DAC_CTRLB_REFSEL(DAC_CTRLB_REFSEL_VDDANA_Val); + } else { + dac->CTRLA.bit.ENABLE = 0; + while (dac->SYNCBUSY.bit.ENABLE) { + } + } + dac->DACCTRL[self->id].reg = DAC_DACCTRL_ENABLE | DAC_DACCTRL_REFRESH(2) | DAC_DACCTRL_CCTRL_CC12M; + + // Enable DAC and wait to be ready + dac->CTRLA.bit.ENABLE = 1; + while (dac->SYNCBUSY.bit.ENABLE) { + } + #endif + + // Set the port as given in self->gpio_id as DAC + mp_hal_set_pin_mux(self->gpio_id, ALT_FCT_DAC); + + return MP_OBJ_FROM_PTR(self); +} + +STATIC void dac_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { + dac_obj_t *self = self_in; + mp_printf(print, "DAC(%u) PIN_PA%02u", self->id, self->gpio_id); +} + +STATIC mp_obj_t dac_write(mp_obj_t self_in, mp_obj_t value_in) { + Dac *dac = dac_bases[0]; // Just one DAC + int value = mp_obj_get_int(value_in); + if (value < 0 || value > MAX_DAC_VALUE) { + mp_raise_ValueError(MP_ERROR_TEXT("value out of range")); + } + #if defined(MCU_SAMD21) + dac->DATA.reg = value; + #elif defined(MCU_SAMD51) + dac_obj_t *self = self_in; + dac->DATA[self->id].reg = value; + #endif + + return mp_const_none; +} +MP_DEFINE_CONST_FUN_OBJ_2(dac_write_obj, dac_write); + +STATIC const mp_rom_map_elem_t dac_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&dac_write_obj) }, +}; + +STATIC MP_DEFINE_CONST_DICT(dac_locals_dict, dac_locals_dict_table); + +MP_DEFINE_CONST_OBJ_TYPE( + machine_dac_type, + MP_QSTR_DAC, + MP_TYPE_FLAG_NONE, + make_new, dac_make_new, + print, dac_print, + locals_dict, &dac_locals_dict + ); diff --git a/ports/samd/modmachine.c b/ports/samd/modmachine.c index cabd6b9c5..f7ad47b3c 100644 --- a/ports/samd/modmachine.c +++ b/ports/samd/modmachine.c @@ -150,6 +150,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = { { MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) }, { MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&machine_adc_type) }, + { MP_ROM_QSTR(MP_QSTR_DAC), MP_ROM_PTR(&machine_dac_type) }, { MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&machine_led_type) }, { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) }, { MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&machine_pwm_type) }, diff --git a/ports/samd/modmachine.h b/ports/samd/modmachine.h index 61b26a1fa..6a745da06 100644 --- a/ports/samd/modmachine.h +++ b/ports/samd/modmachine.h @@ -29,6 +29,7 @@ #include "py/obj.h" extern const mp_obj_type_t machine_adc_type; +extern const mp_obj_type_t machine_dac_type; extern const mp_obj_type_t machine_hw_i2c_type; extern const mp_obj_type_t machine_led_type; extern const mp_obj_type_t machine_pin_type; diff --git a/ports/samd/pin_af.h b/ports/samd/pin_af.h index f9dec6b7d..b75f4ddd0 100644 --- a/ports/samd/pin_af.h +++ b/ports/samd/pin_af.h @@ -81,6 +81,7 @@ typedef struct _pwm_config_t { #define ALT_FCT_EIC 0 #define ALT_FCT_ADC 1 +#define ALT_FCT_DAC 1 #define ALT_FCT_SERCOM1 2 #define ALT_FCT_SERCOM2 3 |