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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014, 2015 Damien P. George
* Copyright (c) 2016 Linaro Limited
*
* 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 <stdio.h>
#include <stdint.h>
#include <string.h>
#include <zephyr.h>
#include <gpio.h>
#include "py/nlr.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/mphal.h"
#include "modmachine.h"
const mp_obj_base_t machine_pin_obj_template = {&machine_pin_type};
STATIC void machine_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
machine_pin_obj_t *self = self_in;
mp_printf(print, "<Pin %p %d>", self->port, self->pin);
}
// pin.init(mode, pull=None, *, value)
STATIC mp_obj_t machine_pin_obj_init_helper(machine_pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_mode, ARG_pull, ARG_value };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
{ MP_QSTR_pull, MP_ARG_OBJ, {.u_obj = mp_const_none}},
{ MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// get io mode
uint mode = args[ARG_mode].u_int;
// get pull mode
uint pull = GPIO_PUD_NORMAL;
if (args[ARG_pull].u_obj != mp_const_none) {
pull = mp_obj_get_int(args[ARG_pull].u_obj);
}
int ret = gpio_pin_configure(self->port, self->pin, mode | pull);
if (ret) {
mp_raise_ValueError("invalid pin");
}
// get initial value
if (args[ARG_value].u_obj != MP_OBJ_NULL) {
(void)gpio_pin_write(self->port, self->pin, mp_obj_is_true(args[ARG_value].u_obj));
}
return mp_const_none;
}
// constructor(drv_name, pin, ...)
mp_obj_t mp_pin_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, MP_OBJ_FUN_ARGS_MAX, true);
// get the wanted port
if (!MP_OBJ_IS_TYPE(args[0], &mp_type_tuple)) {
mp_raise_ValueError("Pin id must be tuple of (\"GPIO_x\", pin#)");
}
mp_obj_t *items;
mp_obj_get_array_fixed_n(args[0], 2, &items);
const char *drv_name = mp_obj_str_get_str(items[0]);
int wanted_pin = mp_obj_get_int(items[1]);
struct device *wanted_port = device_get_binding(drv_name);
if (!wanted_port) {
mp_raise_ValueError("invalid port");
}
machine_pin_obj_t *pin = m_new_obj(machine_pin_obj_t);
pin->base = machine_pin_obj_template;
pin->port = wanted_port;
pin->pin = wanted_pin;
if (n_args > 1 || n_kw > 0) {
// pin mode given, so configure this GPIO
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
machine_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
}
return (mp_obj_t)pin;
}
// fast method for getting/setting pin value
STATIC mp_obj_t machine_pin_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 1, false);
machine_pin_obj_t *self = self_in;
if (n_args == 0) {
u32_t pin_val;
(void)gpio_pin_read(self->port, self->pin, &pin_val);
return MP_OBJ_NEW_SMALL_INT(pin_val);
} else {
(void)gpio_pin_write(self->port, self->pin, mp_obj_is_true(args[0]));
return mp_const_none;
}
}
// pin.init(mode, pull)
STATIC mp_obj_t machine_pin_obj_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
return machine_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
}
MP_DEFINE_CONST_FUN_OBJ_KW(machine_pin_init_obj, 1, machine_pin_obj_init);
// pin.value([value])
STATIC mp_obj_t machine_pin_value(size_t n_args, const mp_obj_t *args) {
return machine_pin_call(args[0], n_args - 1, 0, args + 1);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_pin_value_obj, 1, 2, machine_pin_value);
STATIC mp_obj_t machine_pin_off(mp_obj_t self_in) {
machine_pin_obj_t *self = self_in;
(void)gpio_pin_write(self->port, self->pin, 0);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pin_off_obj, machine_pin_off);
STATIC mp_obj_t machine_pin_on(mp_obj_t self_in) {
machine_pin_obj_t *self = self_in;
(void)gpio_pin_write(self->port, self->pin, 1);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pin_on_obj, machine_pin_on);
STATIC mp_uint_t machine_pin_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
(void)errcode;
machine_pin_obj_t *self = self_in;
switch (request) {
case MP_PIN_READ: {
u32_t pin_val;
gpio_pin_read(self->port, self->pin, &pin_val);
return pin_val;
}
case MP_PIN_WRITE: {
gpio_pin_write(self->port, self->pin, arg);
return 0;
}
}
return -1;
}
STATIC const mp_rom_map_elem_t machine_pin_locals_dict_table[] = {
// instance methods
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_pin_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&machine_pin_value_obj) },
{ MP_ROM_QSTR(MP_QSTR_off), MP_ROM_PTR(&machine_pin_off_obj) },
{ MP_ROM_QSTR(MP_QSTR_on), MP_ROM_PTR(&machine_pin_on_obj) },
// class constants
{ MP_ROM_QSTR(MP_QSTR_IN), MP_ROM_INT(GPIO_DIR_IN) },
{ MP_ROM_QSTR(MP_QSTR_OUT), MP_ROM_INT(GPIO_DIR_OUT) },
{ MP_ROM_QSTR(MP_QSTR_PULL_UP), MP_ROM_INT(GPIO_PUD_PULL_UP) },
{ MP_ROM_QSTR(MP_QSTR_PULL_DOWN), MP_ROM_INT(GPIO_PUD_PULL_DOWN) },
};
STATIC MP_DEFINE_CONST_DICT(machine_pin_locals_dict, machine_pin_locals_dict_table);
STATIC const mp_pin_p_t machine_pin_pin_p = {
.ioctl = machine_pin_ioctl,
};
const mp_obj_type_t machine_pin_type = {
{ &mp_type_type },
.name = MP_QSTR_Pin,
.print = machine_pin_print,
.make_new = mp_pin_make_new,
.call = machine_pin_call,
.protocol = &machine_pin_pin_p,
.locals_dict = (mp_obj_t)&machine_pin_locals_dict,
};