245 lines
8.5 KiB
C
245 lines
8.5 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* Development of the code in this file was sponsored by Microbric Pty Ltd
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2015 Damien P. George
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* Copyright (c) 2016 Paul Sokolovsky
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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 <stdint.h>
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#include <stdio.h>
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#include "driver/timer.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "modmachine.h"
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#include "mphalport.h"
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#define TIMER_INTR_SEL TIMER_INTR_LEVEL
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#define TIMER_DIVIDER 8
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// TIMER_BASE_CLK is normally 80MHz. TIMER_DIVIDER ought to divide this exactly
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#define TIMER_SCALE (TIMER_BASE_CLK / TIMER_DIVIDER)
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#define TIMER_FLAGS 0
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typedef struct _machine_timer_obj_t {
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mp_obj_base_t base;
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mp_uint_t group;
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mp_uint_t index;
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mp_uint_t repeat;
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// ESP32 timers are 64-bit
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uint64_t period;
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mp_obj_t callback;
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intr_handle_t handle;
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struct _machine_timer_obj_t *next;
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} machine_timer_obj_t;
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const mp_obj_type_t machine_timer_type;
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STATIC void machine_timer_disable(machine_timer_obj_t *self);
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void machine_timer_deinit_all(void) {
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// Disable, deallocate and remove all timers from list
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machine_timer_obj_t **t = &MP_STATE_PORT(machine_timer_obj_head);
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while (*t != NULL) {
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machine_timer_disable(*t);
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machine_timer_obj_t *next = (*t)->next;
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m_del_obj(machine_timer_obj_t, *t);
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*t = next;
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}
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}
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STATIC void machine_timer_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_timer_obj_t *self = self_in;
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timer_config_t config;
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mp_printf(print, "Timer(%p; ", self);
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timer_get_config(self->group, self->index, &config);
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mp_printf(print, "alarm_en=%d, ", config.alarm_en);
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mp_printf(print, "auto_reload=%d, ", config.auto_reload);
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mp_printf(print, "counter_en=%d)", config.counter_en);
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}
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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 *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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mp_uint_t group = (mp_obj_get_int(args[0]) >> 1) & 1;
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mp_uint_t index = mp_obj_get_int(args[0]) & 1;
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// Check whether the timer is already initialized, if so return it
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for (machine_timer_obj_t *t = MP_STATE_PORT(machine_timer_obj_head); t; t = t->next) {
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if (t->group == group && t->index == index) {
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return t;
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}
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}
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machine_timer_obj_t *self = m_new_obj(machine_timer_obj_t);
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self->base.type = &machine_timer_type;
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self->group = group;
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self->index = index;
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// Add the timer to the linked-list of timers
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self->next = MP_STATE_PORT(machine_timer_obj_head);
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MP_STATE_PORT(machine_timer_obj_head) = self;
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return self;
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}
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STATIC void machine_timer_disable(machine_timer_obj_t *self) {
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if (self->handle) {
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timer_pause(self->group, self->index);
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esp_intr_free(self->handle);
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self->handle = NULL;
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}
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// We let the disabled timer stay in the list, as it might be
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// referenced elsewhere
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}
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STATIC void machine_timer_isr(void *self_in) {
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machine_timer_obj_t *self = self_in;
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timg_dev_t *device = self->group ? &(TIMERG1) : &(TIMERG0);
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device->hw_timer[self->index].update = 1;
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if (self->index) {
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device->int_clr_timers.t1 = 1;
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} else {
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device->int_clr_timers.t0 = 1;
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}
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device->hw_timer[self->index].config.alarm_en = self->repeat;
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mp_sched_schedule(self->callback, self);
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mp_hal_wake_main_task_from_isr();
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}
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STATIC void machine_timer_enable(machine_timer_obj_t *self) {
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timer_config_t config;
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config.alarm_en = TIMER_ALARM_EN;
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config.auto_reload = self->repeat;
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config.counter_dir = TIMER_COUNT_UP;
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config.divider = TIMER_DIVIDER;
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config.intr_type = TIMER_INTR_LEVEL;
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config.counter_en = TIMER_PAUSE;
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check_esp_err(timer_init(self->group, self->index, &config));
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check_esp_err(timer_set_counter_value(self->group, self->index, 0x00000000));
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check_esp_err(timer_set_alarm_value(self->group, self->index, self->period));
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check_esp_err(timer_enable_intr(self->group, self->index));
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check_esp_err(timer_isr_register(self->group, self->index, machine_timer_isr, (void *)self, TIMER_FLAGS, &self->handle));
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check_esp_err(timer_start(self->group, self->index));
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}
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STATIC mp_obj_t machine_timer_init_helper(machine_timer_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum {
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ARG_mode,
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ARG_callback,
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ARG_period,
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ARG_tick_hz,
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ARG_freq,
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};
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_mode, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
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{ MP_QSTR_callback, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_period, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
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{ MP_QSTR_tick_hz, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1000} },
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#if MICROPY_PY_BUILTINS_FLOAT
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{ MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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#else
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{ MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
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#endif
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};
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machine_timer_disable(self);
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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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#if MICROPY_PY_BUILTINS_FLOAT
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if (args[ARG_freq].u_obj != mp_const_none) {
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self->period = (uint64_t)(TIMER_SCALE / mp_obj_get_float(args[ARG_freq].u_obj));
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}
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#else
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if (args[ARG_freq].u_int != 0xffffffff) {
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self->period = TIMER_SCALE / ((uint64_t)args[ARG_freq].u_int);
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}
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#endif
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else {
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self->period = (((uint64_t)args[ARG_period].u_int) * TIMER_SCALE) / args[ARG_tick_hz].u_int;
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}
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self->repeat = args[ARG_mode].u_int;
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self->callback = args[ARG_callback].u_obj;
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self->handle = NULL;
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machine_timer_enable(self);
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return mp_const_none;
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}
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STATIC mp_obj_t machine_timer_deinit(mp_obj_t self_in) {
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machine_timer_disable(self_in);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_timer_deinit_obj, machine_timer_deinit);
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STATIC mp_obj_t machine_timer_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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return machine_timer_init_helper(args[0], n_args - 1, args + 1, kw_args);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_timer_init_obj, 1, machine_timer_init);
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STATIC mp_obj_t machine_timer_value(mp_obj_t self_in) {
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machine_timer_obj_t *self = self_in;
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double result;
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timer_get_counter_time_sec(self->group, self->index, &result);
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return MP_OBJ_NEW_SMALL_INT((mp_uint_t)(result * 1000)); // value in ms
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_timer_value_obj, machine_timer_value);
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STATIC const mp_rom_map_elem_t machine_timer_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&machine_timer_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_timer_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_timer_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&machine_timer_value_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ONE_SHOT), MP_ROM_INT(false) },
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{ MP_ROM_QSTR(MP_QSTR_PERIODIC), MP_ROM_INT(true) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_timer_locals_dict, machine_timer_locals_dict_table);
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const mp_obj_type_t machine_timer_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Timer,
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.print = machine_timer_print,
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.make_new = machine_timer_make_new,
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.locals_dict = (mp_obj_t)&machine_timer_locals_dict,
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};
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