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Diffstat (limited to 'ports/nrf/modules/machine/timer.c')
| -rw-r--r-- | ports/nrf/modules/machine/timer.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/ports/nrf/modules/machine/timer.c b/ports/nrf/modules/machine/timer.c new file mode 100644 index 000000000..c8eb2ef30 --- /dev/null +++ b/ports/nrf/modules/machine/timer.c @@ -0,0 +1,194 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2016 Glenn Ruben Bakke + * + * 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 <string.h> + +#include "py/nlr.h" +#include "py/runtime.h" +#include "py/mphal.h" +#include "timer.h" +#include "hal_timer.h" + +#if MICROPY_PY_MACHINE_TIMER + +typedef struct _machine_timer_obj_t { + mp_obj_base_t base; + hal_timer_conf_t * p_config; + mp_obj_t callback; + mp_int_t period; + mp_int_t mode; +} machine_timer_obj_t; + +static hal_timer_conf_t timer_config0 = {.id = 0}; +static hal_timer_conf_t timer_config1 = {.id = 1}; +static hal_timer_conf_t timer_config2 = {.id = 2}; + +#if NRF52 +static hal_timer_conf_t timer_config3 = {.id = 3}; +static hal_timer_conf_t timer_config4 = {.id = 4}; +#endif + +STATIC machine_timer_obj_t machine_timer_obj[] = { + {{&machine_timer_type}, &timer_config0}, + {{&machine_timer_type}, &timer_config1}, + {{&machine_timer_type}, &timer_config2}, +#if NRF52 + {{&machine_timer_type}, &timer_config3}, + {{&machine_timer_type}, &timer_config4}, +#endif +}; + +STATIC void hal_interrupt_handle(uint8_t id) { + machine_timer_obj_t * self = &machine_timer_obj[id]; + + mp_call_function_1(self->callback, self); + + if (self != NULL) { + hal_timer_stop(id); + if (self->mode == 1) { + hal_timer_start(id); + } + } +} + +void timer_init0(void) { + hal_timer_callback_set(hal_interrupt_handle); +} + +STATIC int timer_find(mp_obj_t id) { + // given an integer id + int timer_id = mp_obj_get_int(id); + if (timer_id >= 0 && timer_id < MP_ARRAY_SIZE(machine_timer_obj) + && machine_timer_obj[timer_id].p_config != NULL) { + return timer_id; + } + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "Timer(%d) does not exist", timer_id)); +} + +STATIC void timer_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind) { + machine_timer_obj_t *self = o; + mp_printf(print, "Timer(%u)", self->p_config->id); +} + +/******************************************************************************/ +/* MicroPython bindings for machine API */ + +STATIC mp_obj_t machine_timer_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { + static const mp_arg_t allowed_args[] = { + { MP_QSTR_id, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} }, + { MP_QSTR_period, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1000} }, + { MP_QSTR_mode, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} }, + { MP_QSTR_callback, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} }, + }; + + // parse args + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + // get static peripheral object + int timer_id = timer_find(args[0].u_obj); + +#if BLUETOOTH_SD + if (timer_id == 0) { + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "Timer(%d) reserved by Bluetooth LE stack.", timer_id)); + } +#endif + +#if MICROPY_PY_MACHINE_SOFT_PWM + if (timer_id == 1) { + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "Timer(%d) reserved by ticker driver.", timer_id)); + } +#endif + + machine_timer_obj_t *self = &machine_timer_obj[timer_id]; + + self->p_config->period = args[1].u_int; + + self->mode = args[2].u_int; + + if (args[3].u_obj != mp_const_none) { + self->callback = args[3].u_obj; + } + +#ifdef NRF51 + self->p_config->irq_priority = 3; +#else + self->p_config->irq_priority = 6; +#endif + + hal_timer_init(self->p_config); + + return MP_OBJ_FROM_PTR(self); +} + +/// \method start(period) +/// Start the timer. +/// +STATIC mp_obj_t machine_timer_start(mp_obj_t self_in) { + machine_timer_obj_t * self = MP_OBJ_TO_PTR(self_in); + + hal_timer_start(self->p_config->id); + + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_timer_start_obj, machine_timer_start); + +/// \method stop() +/// Stop the timer. +/// +STATIC mp_obj_t machine_timer_stop(mp_obj_t self_in) { + machine_timer_obj_t * self = MP_OBJ_TO_PTR(self_in); + + hal_timer_stop(self->p_config->id); + + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_timer_stop_obj, machine_timer_stop); + +STATIC const mp_rom_map_elem_t machine_timer_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_start), MP_ROM_PTR(&machine_timer_start_obj) }, + { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&machine_timer_stop_obj) }, + + // constants + { MP_ROM_QSTR(MP_QSTR_ONESHOT), MP_ROM_INT(0) }, + { MP_ROM_QSTR(MP_QSTR_PERIODIC), MP_ROM_INT(1) }, +}; + +STATIC MP_DEFINE_CONST_DICT(machine_timer_locals_dict, machine_timer_locals_dict_table); + +const mp_obj_type_t machine_timer_type = { + { &mp_type_type }, + .name = MP_QSTR_Timer, + .print = timer_print, + .make_new = machine_timer_make_new, + .locals_dict = (mp_obj_dict_t*)&machine_timer_locals_dict +}; + +#endif // MICROPY_PY_MACHINE_TIMER |