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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Josef Gajdusek
*
* 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.
*/
// This file is never compiled standalone, it's included directly from
// extmod/machine_adc.c via MICROPY_PY_MACHINE_ADC_INCLUDEFILE.
#include "user_interface.h"
// The ADC class doesn't have any constants for this port.
#define MICROPY_PY_MACHINE_ADC_CLASS_CONSTANTS
typedef struct _machine_adc_obj_t {
mp_obj_base_t base;
bool isvdd;
} machine_adc_obj_t;
static machine_adc_obj_t machine_adc_vdd3 = {{&machine_adc_type}, true};
static machine_adc_obj_t machine_adc_adc = {{&machine_adc_type}, false};
static uint16_t adc_read(machine_adc_obj_t *self) {
if (self->isvdd) {
return system_get_vdd33();
} else {
return system_adc_read();
}
}
static void mp_machine_adc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
machine_adc_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "ADC(%u)", self->isvdd);
}
static mp_obj_t mp_machine_adc_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 1, false);
mp_int_t chn = mp_obj_get_int(args[0]);
switch (chn) {
case 0:
return &machine_adc_adc;
case 1:
return &machine_adc_vdd3;
default:
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("ADC(%d) doesn't exist"), chn);
}
}
// read_u16()
static mp_int_t mp_machine_adc_read_u16(machine_adc_obj_t *self) {
uint32_t value = adc_read(self);
return value * 65535 / 1024;
}
// Legacy method
static mp_int_t mp_machine_adc_read(machine_adc_obj_t *self) {
return adc_read(self);
}
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