kopia lustrzana https://github.com/micropython/micropython
108 wiersze
3.3 KiB
C
108 wiersze
3.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2017 Damien P. George
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* Copyright (c) 2024 NXP
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// This file is never compiled standalone, it's included directly from
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// extmod/machine_adc.c via MICROPY_PY_MACHINE_ADC_INCLUDEFILE.
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#include "py/mphal.h"
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#include "drv_adc.h"
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#define MICROPY_PY_MACHINE_ADC_CLASS_CONSTANTS
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typedef struct _machine_adc_obj_t {
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mp_obj_base_t base;
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uint8_t id;
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drv_adc_t drv;
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drv_adc_side_t side;
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uint8_t channel;
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} machine_adc_obj_t;
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static void mp_machine_adc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_adc_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "ADC(%u,", self->id);
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char side = 'A';
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if (self->side == DRV_ADCSideB) {
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side = 'B';
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}
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mp_printf(print, " side=%c, channel=%u)", side, self->channel);
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}
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static mp_obj_t mp_machine_adc_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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mp_obj_t pin_obj = args[0];
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if (!mp_obj_is_type(pin_obj, &machine_pin_type)) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("Object is not a Pin object."));
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}
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mp_hal_pin_obj_t pin = MP_OBJ_TO_PTR(pin_obj);
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const machine_pin_adc_t *adc = mp_hal_pin_find_adc(pin);
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if (adc == NULL) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("Pin does not have ADC capabilities."));
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}
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machine_adc_obj_t *self = mp_obj_malloc(machine_adc_obj_t, &machine_adc_type);
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mp_hal_pin_analog(pin);
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self->id = adc->adc_id;
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self->channel = adc->adc_channel;
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switch (adc->adc_side) {
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case 'A':
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default:
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self->side = DRV_ADCSideA;
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break;
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case 'B':
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self->side = DRV_ADCSideB;
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break;
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}
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if (drv_adc_init(&self->drv, self->id) < 0) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("failed to initialize ADC"));
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}
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return MP_OBJ_FROM_PTR(self);
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}
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static mp_int_t mp_machine_adc_read_u16(machine_adc_obj_t *self) {
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uint16_t ad_val;
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int ret = drv_adc_measure(&self->drv, self->side, self->channel, &ad_val);
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if (ret < 0) {
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return ret;
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}
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return ad_val;
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}
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