diff options
Diffstat (limited to 'zephyr/machine_pin.c')
| -rw-r--r-- | zephyr/machine_pin.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/zephyr/machine_pin.c b/zephyr/machine_pin.c new file mode 100644 index 0000000000..049255e9f6 --- /dev/null +++ b/zephyr/machine_pin.c @@ -0,0 +1,180 @@ +/* + * This file is part of the Micro Python 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, ...) +STATIC mp_obj_t machine_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) { + uint32_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); + +// pin.low() +STATIC mp_obj_t machine_pin_low(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_low_obj, machine_pin_low); + +// pin.high() +STATIC mp_obj_t machine_pin_high(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_high_obj, machine_pin_high); + +STATIC const mp_map_elem_t machine_pin_locals_dict_table[] = { + // instance methods + { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&machine_pin_init_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&machine_pin_value_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_low), (mp_obj_t)&machine_pin_low_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_high), (mp_obj_t)&machine_pin_high_obj }, + + // class constants + { MP_OBJ_NEW_QSTR(MP_QSTR_IN), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_IN) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_OUT), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_OUT) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP), MP_OBJ_NEW_SMALL_INT(GPIO_PUD_PULL_UP) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(GPIO_PUD_PULL_DOWN) }, +}; + +STATIC MP_DEFINE_CONST_DICT(machine_pin_locals_dict, machine_pin_locals_dict_table); + +const mp_obj_type_t machine_pin_type = { + { &mp_type_type }, + .name = MP_QSTR_Pin, + .print = machine_pin_print, + .make_new = machine_pin_make_new, + .call = machine_pin_call, + .locals_dict = (mp_obj_t)&machine_pin_locals_dict, +}; |