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/*
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* This file is part of the Micro Python 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, 2014, 2015 Damien P. George
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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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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include "c_types.h"
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#include "user_interface.h"
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#include "gpio.h"
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#include "py/nlr.h"
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#include "py/runtime.h"
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#include "modpyb.h"
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#define GPIO_MODE_INPUT (0)
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#define GPIO_MODE_OUTPUT (1)
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#define GPIO_PULL_NONE (0)
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#define GPIO_PULL_UP (1)
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#define GPIO_PULL_DOWN (2)
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typedef struct _pyb_pin_obj_t {
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mp_obj_base_t base;
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uint16_t pin_id;
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uint16_t phys_port;
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uint32_t periph;
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uint16_t func;
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} pyb_pin_obj_t;
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STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
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{{&pyb_pin_type}, 0, 0, PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0},
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{{&pyb_pin_type}, 1, 1, PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1},
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{{&pyb_pin_type}, 2, 2, PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2},
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{{&pyb_pin_type}, 3, 3, PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3},
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{{&pyb_pin_type}, 4, 4, PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4},
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{{&pyb_pin_type}, 5, 5, PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5},
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{{&pyb_pin_type}, 9, 9, PERIPHS_IO_MUX_SD_DATA2_U, FUNC_GPIO9},
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{{&pyb_pin_type}, 10, 10, PERIPHS_IO_MUX_SD_DATA3_U, FUNC_GPIO10},
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{{&pyb_pin_type}, 12, 12, PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12},
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{{&pyb_pin_type}, 13, 13, PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13},
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{{&pyb_pin_type}, 14, 14, PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14},
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{{&pyb_pin_type}, 15, 15, PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15},
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};
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STATIC void pyb_pin_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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pyb_pin_obj_t *self = self_in;
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// pin name
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print(env, "Pin(%u)", self->pin_id);
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}
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// pin.init(mode, pull=Pin.PULL_NONE, af=-1)
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STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
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{ MP_QSTR_pull, MP_ARG_INT, {.u_int = GPIO_PULL_NONE}},
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};
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// parse args
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// get io mode
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uint mode = args[0].u_int;
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// get pull mode
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uint pull = args[1].u_int;
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// configure the GPIO as requested
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PIN_FUNC_SELECT(self->periph, self->func);
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if ((pull & GPIO_PULL_DOWN) == 0) {
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PIN_PULLDWN_DIS(self->periph);
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}
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if ((pull & GPIO_PULL_UP) == 0) {
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PIN_PULLUP_DIS(self->periph);
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}
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if ((pull & GPIO_PULL_DOWN) != 0) {
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PIN_PULLDWN_EN(self->periph);
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}
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if ((pull & GPIO_PULL_UP) != 0) {
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PIN_PULLUP_EN(self->periph);
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}
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// TODO input mode is not working...
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if ((mode & GPIO_MODE_OUTPUT) == 0) {
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GPIO_DIS_OUTPUT(self->phys_port);
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}
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return mp_const_none;
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}
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// constructor(id, ...)
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STATIC mp_obj_t pyb_pin_make_new(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
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// Run an argument through the mapper and return the result.
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int wanted_pin = mp_obj_get_int(args[0]);
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pyb_pin_obj_t *pin = NULL;
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for (int i = 0; i < MP_ARRAY_SIZE(pyb_pin_obj); i++) {
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if (pyb_pin_obj[i].pin_id == wanted_pin) {
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pin = (pyb_pin_obj_t*)&pyb_pin_obj[i];
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break;
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}
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}
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if (pin == NULL) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid pin"));
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}
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if (n_args > 1 || n_kw > 0) {
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// pin mode given, so configure this GPIO
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
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pyb_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
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}
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return (mp_obj_t)pin;
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}
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// pin.init(mode, pull)
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STATIC mp_obj_t pyb_pin_obj_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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return pyb_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_init_obj, 1, pyb_pin_obj_init);
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// pin.value([value])
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STATIC mp_obj_t pyb_pin_value(mp_uint_t n_args, const mp_obj_t *args) {
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pyb_pin_obj_t *self = args[0];
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if (n_args == 1) {
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// get pin
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return MP_OBJ_NEW_SMALL_INT(GPIO_INPUT_GET(self->phys_port));
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} else {
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// set pin
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if (mp_obj_is_true(args[1])) {
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GPIO_OUTPUT_SET(self->phys_port, 1);
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} else {
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GPIO_OUTPUT_SET(self->phys_port, 0);
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}
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return mp_const_none;
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_pin_value_obj, 1, 2, pyb_pin_value);
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// pin.low()
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STATIC mp_obj_t pyb_pin_low(mp_obj_t self_in) {
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pyb_pin_obj_t *self = self_in;
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GPIO_OUTPUT_SET(self->phys_port, 0);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_low_obj, pyb_pin_low);
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// pin.high()
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STATIC mp_obj_t pyb_pin_high(mp_obj_t self_in) {
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pyb_pin_obj_t *self = self_in;
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GPIO_OUTPUT_SET(self->phys_port, 1);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_high_obj, pyb_pin_high);
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STATIC const mp_map_elem_t pyb_pin_locals_dict_table[] = {
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// instance methods
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{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_pin_init_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&pyb_pin_value_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_low), (mp_obj_t)&pyb_pin_low_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_high), (mp_obj_t)&pyb_pin_high_obj },
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// class constants
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{ MP_OBJ_NEW_QSTR(MP_QSTR_IN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_INPUT) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_OUT_PP), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OUTPUT) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_NONE), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_NONE) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_UP) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_DOWN) },
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_pin_locals_dict, pyb_pin_locals_dict_table);
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const mp_obj_type_t pyb_pin_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Pin,
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.print = pyb_pin_print,
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.make_new = pyb_pin_make_new,
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.locals_dict = (mp_obj_t)&pyb_pin_locals_dict,
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};
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Damien George