457 lines
16 KiB
C
457 lines
16 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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* 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 "py/obj.h"
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#include "py/runtime.h"
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#include "shared/runtime/pyexec.h"
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// This needs to be set before we include the RTOS headers
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#define USE_US_TIMER 1
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#include "extmod/machine_bitstream.h"
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#include "extmod/machine_mem.h"
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#include "extmod/machine_signal.h"
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#include "extmod/machine_pulse.h"
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#include "extmod/machine_i2c.h"
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#include "extmod/machine_spi.h"
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#include "modmachine.h"
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#include "xtirq.h"
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#include "os_type.h"
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#include "osapi.h"
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#include "etshal.h"
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#include "ets_alt_task.h"
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#include "user_interface.h"
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#if MICROPY_PY_MACHINE
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// #define MACHINE_WAKE_IDLE (0x01)
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// #define MACHINE_WAKE_SLEEP (0x02)
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#define MACHINE_WAKE_DEEPSLEEP (0x04)
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extern const mp_obj_type_t esp_wdt_type;
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STATIC mp_obj_t machine_freq(size_t n_args, const mp_obj_t *args) {
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if (n_args == 0) {
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// get
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return mp_obj_new_int(system_get_cpu_freq() * 1000000);
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} else {
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// set
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mp_int_t freq = mp_obj_get_int(args[0]) / 1000000;
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if (freq != 80 && freq != 160) {
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mp_raise_ValueError(MP_ERROR_TEXT("frequency can only be either 80Mhz or 160MHz"));
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}
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system_update_cpu_freq(freq);
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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(machine_freq_obj, 0, 1, machine_freq);
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STATIC mp_obj_t machine_reset(void) {
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system_restart();
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);
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STATIC mp_obj_t machine_soft_reset(void) {
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pyexec_system_exit = PYEXEC_FORCED_EXIT;
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mp_raise_type(&mp_type_SystemExit);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_soft_reset_obj, machine_soft_reset);
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STATIC mp_obj_t machine_reset_cause(void) {
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return MP_OBJ_NEW_SMALL_INT(system_get_rst_info()->reason);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_cause_obj, machine_reset_cause);
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STATIC mp_obj_t machine_unique_id(void) {
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uint32_t id = system_get_chip_id();
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return mp_obj_new_bytes((byte *)&id, sizeof(id));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
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STATIC mp_obj_t machine_idle(void) {
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uint32_t t = mp_hal_ticks_cpu();
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asm ("waiti 0");
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t = mp_hal_ticks_cpu() - t;
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ets_event_poll(); // handle any events after possibly a long wait (eg feed WDT)
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return MP_OBJ_NEW_SMALL_INT(t);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
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STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args) {
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uint32_t max_us = 0xffffffff;
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if (n_args == 1) {
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mp_int_t max_ms = mp_obj_get_int(args[0]);
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if (max_ms < 0) {
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max_ms = 0;
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}
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max_us = max_ms * 1000;
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}
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uint32_t wifi_mode = wifi_get_opmode();
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uint32_t start = system_get_time();
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while (system_get_time() - start <= max_us) {
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ets_event_poll();
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if (wifi_mode == NULL_MODE) {
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// Can only idle if the wifi is off
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asm ("waiti 0");
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}
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_lightsleep_obj, 0, 1, machine_lightsleep);
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STATIC mp_obj_t machine_deepsleep(size_t n_args, const mp_obj_t *args) {
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// default to sleep forever
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uint32_t sleep_us = 0;
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// see if RTC.ALARM0 should wake the device
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if (pyb_rtc_alarm0_wake & MACHINE_WAKE_DEEPSLEEP) {
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uint64_t t = pyb_rtc_get_us_since_epoch();
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if (pyb_rtc_alarm0_expiry <= t) {
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sleep_us = 1; // alarm already expired so wake immediately
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} else {
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uint64_t delta = pyb_rtc_alarm0_expiry - t;
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if (delta <= 0xffffffff) {
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// sleep for the desired time
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sleep_us = delta;
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} else {
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// overflow, just set to maximum sleep time
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sleep_us = 0xffffffff;
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}
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}
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}
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// if an argument is given then that's the maximum time to sleep for
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if (n_args == 1) {
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mp_int_t max_ms = mp_obj_get_int(args[0]);
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if (max_ms <= 0) {
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max_ms = 1;
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}
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uint32_t max_us = max_ms * 1000;
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if (sleep_us == 0 || max_us < sleep_us) {
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sleep_us = max_us;
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}
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}
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// prepare for RTC reset at wake up
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rtc_prepare_deepsleep(sleep_us);
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// put the device in a deep-sleep state
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system_deep_sleep_set_option(0); // default power down mode; TODO check this
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system_deep_sleep(sleep_us);
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for (;;) {
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// we must not return
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ets_loop_iter();
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_deepsleep_obj, 0, 1, machine_deepsleep);
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// These values are from the datasheet
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#define ESP_TIMER_US_MIN (100)
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#define ESP_TIMER_US_MAX (0xfffffff)
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#define ESP_TIMER_MS_MAX (0x689d0)
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typedef struct _esp_timer_obj_t {
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mp_obj_base_t base;
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os_timer_t timer;
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uint32_t remain_ms; // if non-zero, remaining time to handle large periods
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uint32_t period_ms; // if non-zero, periodic timer with a large period
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mp_obj_t callback;
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} esp_timer_obj_t;
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STATIC void esp_timer_arm_ms(esp_timer_obj_t *self, uint32_t ms, bool repeat) {
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if (ms <= ESP_TIMER_MS_MAX) {
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self->remain_ms = 0;
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self->period_ms = 0;
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} else {
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self->remain_ms = ms - ESP_TIMER_MS_MAX;
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if (repeat) {
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repeat = false;
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self->period_ms = ms;
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} else {
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self->period_ms = 0;
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}
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ms = ESP_TIMER_MS_MAX;
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}
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os_timer_arm(&self->timer, ms, repeat);
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}
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STATIC void esp_timer_arm_us(esp_timer_obj_t *self, uint32_t us, bool repeat) {
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if (us < ESP_TIMER_US_MIN) {
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us = ESP_TIMER_US_MIN;
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}
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if (us <= ESP_TIMER_US_MAX) {
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self->remain_ms = 0;
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self->period_ms = 0;
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os_timer_arm_us(&self->timer, us, repeat);
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} else {
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esp_timer_arm_ms(self, us / 1000, repeat);
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}
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}
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const mp_obj_type_t esp_timer_type;
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STATIC void esp_timer_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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esp_timer_obj_t *self = self_in;
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mp_printf(print, "Timer(%p)", &self->timer);
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}
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STATIC mp_obj_t esp_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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esp_timer_obj_t *tim = m_new_obj(esp_timer_obj_t);
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tim->base.type = &esp_timer_type;
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return tim;
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}
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STATIC void esp_timer_cb(void *arg) {
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esp_timer_obj_t *self = arg;
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if (self->remain_ms != 0) {
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// Handle periods larger than the maximum system period
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uint32_t next_period_ms = self->remain_ms;
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if (next_period_ms > ESP_TIMER_MS_MAX) {
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next_period_ms = ESP_TIMER_MS_MAX;
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}
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self->remain_ms -= next_period_ms;
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os_timer_arm(&self->timer, next_period_ms, false);
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} else {
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mp_sched_schedule(self->callback, self);
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if (self->period_ms != 0) {
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// A periodic timer with a larger period: reschedule it
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esp_timer_arm_ms(self, self->period_ms, true);
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}
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}
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}
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STATIC mp_obj_t esp_timer_init_helper(esp_timer_obj_t *self, size_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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// 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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self->callback = args[ARG_callback].u_obj;
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// Be sure to disarm timer before making any changes
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os_timer_disarm(&self->timer);
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os_timer_setfn(&self->timer, esp_timer_cb, self);
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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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mp_float_t freq = mp_obj_get_float(args[ARG_freq].u_obj);
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if (freq < 0.001) {
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esp_timer_arm_ms(self, (mp_int_t)(1000 / freq), args[ARG_mode].u_int);
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} else {
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esp_timer_arm_us(self, (mp_int_t)(1000000 / freq), args[ARG_mode].u_int);
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}
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}
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#else
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if (args[ARG_freq].u_int != 0xffffffff) {
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esp_timer_arm_us(self, 1000000 / args[ARG_freq].u_int, args[ARG_mode].u_int);
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}
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#endif
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else {
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mp_int_t period = args[ARG_period].u_int;
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mp_int_t hz = args[ARG_tick_hz].u_int;
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if (hz == 1000) {
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esp_timer_arm_ms(self, period, args[ARG_mode].u_int);
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} else if (hz == 1000000) {
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esp_timer_arm_us(self, period, args[ARG_mode].u_int);
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} else {
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// Use a long long to ensure that we don't either overflow or loose accuracy
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uint64_t period_us = (((uint64_t)period) * 1000000) / hz;
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if (period_us < 0x80000000ull) {
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esp_timer_arm_us(self, (mp_int_t)period_us, args[ARG_mode].u_int);
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} else {
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esp_timer_arm_ms(self, (mp_int_t)(period_us / 1000), args[ARG_mode].u_int);
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}
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}
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}
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return mp_const_none;
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}
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STATIC mp_obj_t esp_timer_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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return esp_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(esp_timer_init_obj, 1, esp_timer_init);
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STATIC mp_obj_t esp_timer_deinit(mp_obj_t self_in) {
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esp_timer_obj_t *self = self_in;
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os_timer_disarm(&self->timer);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp_timer_deinit_obj, esp_timer_deinit);
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STATIC const mp_rom_map_elem_t esp_timer_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&esp_timer_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&esp_timer_init_obj) },
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// { MP_ROM_QSTR(MP_QSTR_callback), MP_ROM_PTR(&esp_timer_callback_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(esp_timer_locals_dict, esp_timer_locals_dict_table);
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const mp_obj_type_t esp_timer_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Timer,
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.print = esp_timer_print,
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.make_new = esp_timer_make_new,
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.locals_dict = (mp_obj_dict_t *)&esp_timer_locals_dict,
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};
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// this bit is unused in the Xtensa PS register
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#define ETS_LOOP_ITER_BIT (12)
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STATIC mp_obj_t machine_disable_irq(void) {
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uint32_t state = disable_irq();
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state = (state & ~(1 << ETS_LOOP_ITER_BIT)) | (ets_loop_iter_disable << ETS_LOOP_ITER_BIT);
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ets_loop_iter_disable = 1;
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return mp_obj_new_int(state);
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}
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MP_DEFINE_CONST_FUN_OBJ_0(machine_disable_irq_obj, machine_disable_irq);
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STATIC mp_obj_t machine_enable_irq(mp_obj_t state_in) {
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uint32_t state = mp_obj_get_int(state_in);
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ets_loop_iter_disable = (state >> ETS_LOOP_ITER_BIT) & 1;
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enable_irq(state & ~(1 << ETS_LOOP_ITER_BIT));
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(machine_enable_irq_obj, machine_enable_irq);
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// Custom version of this function that feeds system WDT if necessary
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mp_uint_t machine_time_pulse_us(mp_hal_pin_obj_t pin, int pulse_level, mp_uint_t timeout_us) {
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int nchanges = 2;
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uint32_t start = system_get_time(); // in microseconds
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for (;;) {
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uint32_t dt = system_get_time() - start;
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// Check if pin changed to wanted value
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if (mp_hal_pin_read(pin) == pulse_level) {
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if (--nchanges == 0) {
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return dt;
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}
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pulse_level = 1 - pulse_level;
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start = system_get_time();
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continue;
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}
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// Check for timeout
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if (dt >= timeout_us) {
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return (mp_uint_t)-nchanges;
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}
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// Only feed WDT every now and then, to make sure edge timing is accurate
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if ((dt & 0xffff) == 0xffff && !ets_loop_dont_feed_sw_wdt) {
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system_soft_wdt_feed();
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}
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}
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}
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STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_umachine) },
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{ MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },
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{ MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&machine_freq_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&machine_reset_obj) },
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{ MP_ROM_QSTR(MP_QSTR_soft_reset), MP_ROM_PTR(&machine_soft_reset_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset_cause), MP_ROM_PTR(&machine_reset_cause_obj) },
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{ MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) },
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{ MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
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{ MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&machine_lightsleep_obj) },
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{ MP_ROM_QSTR(MP_QSTR_lightsleep), MP_ROM_PTR(&machine_lightsleep_obj) },
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{ MP_ROM_QSTR(MP_QSTR_deepsleep), MP_ROM_PTR(&machine_deepsleep_obj) },
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{ MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },
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{ MP_ROM_QSTR(MP_QSTR_enable_irq), MP_ROM_PTR(&machine_enable_irq_obj) },
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#if MICROPY_PY_MACHINE_BITSTREAM
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{ MP_ROM_QSTR(MP_QSTR_bitstream), MP_ROM_PTR(&machine_bitstream_obj) },
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#endif
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{ MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
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{ MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&pyb_rtc_type) },
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{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&esp_timer_type) },
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{ MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&esp_wdt_type) },
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{ MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&pyb_pin_type) },
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{ MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
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{ MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&pyb_pwm_type) },
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{ MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&machine_adc_type) },
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{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&pyb_uart_type) },
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#if MICROPY_PY_MACHINE_I2C
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{ MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
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{ MP_ROM_QSTR(MP_QSTR_SoftI2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
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#endif
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#if MICROPY_PY_MACHINE_SPI
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{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_hspi_type) },
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{ MP_ROM_QSTR(MP_QSTR_SoftSPI), MP_ROM_PTR(&mp_machine_soft_spi_type) },
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#endif
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// wake abilities
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{ MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) },
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// reset causes
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{ MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(REASON_DEFAULT_RST) },
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{ MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(REASON_EXT_SYS_RST) },
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{ MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(REASON_DEEP_SLEEP_AWAKE) },
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{ MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(REASON_WDT_RST) },
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{ MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(REASON_SOFT_RESTART) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
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const mp_obj_module_t mp_module_machine = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&machine_module_globals,
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};
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#endif // MICROPY_PY_MACHINE
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