mirror of
https://github.com/esp8266/Arduino.git
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137 lines
3.1 KiB
C++
137 lines
3.1 KiB
C++
/*
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main.cpp - platform initialization and context switching
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emulation
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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//This may be used to change user task stack size:
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//#define CONT_STACKSIZE 4096
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#include <Arduino.h>
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extern "C" {
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#include "ets_sys.h"
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#include "os_type.h"
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#include "osapi.h"
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#include "mem.h"
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#include "user_interface.h"
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#include "cont.h"
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}
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#define LOOP_TASK_PRIORITY 0
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#define LOOP_QUEUE_SIZE 1
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int atexit(void (*func)()) {
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return 0;
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}
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extern "C" void ets_update_cpu_frequency(int freqmhz);
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void initVariant() __attribute__((weak));
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void initVariant() {
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}
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extern void loop();
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extern void setup();
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void preloop_update_frequency() __attribute__((weak));
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void preloop_update_frequency() {
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#if defined(F_CPU) && (F_CPU == 160000000L)
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REG_SET_BIT(0x3ff00014, BIT(0));
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ets_update_cpu_frequency(160);
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#endif
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}
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extern void (*__init_array_start)(void);
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extern void (*__init_array_end)(void);
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static cont_t g_cont;
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static os_event_t g_loop_queue[LOOP_QUEUE_SIZE];
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static uint32_t g_micros_at_task_start;
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extern "C" uint32_t esp_micros_at_task_start() {
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return g_micros_at_task_start;
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}
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extern "C" void abort() {
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while(1) {
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}
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}
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extern "C" void esp_yield() {
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cont_yield(&g_cont);
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}
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extern "C" void esp_schedule() {
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system_os_post(LOOP_TASK_PRIORITY, 0, 0);
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}
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extern "C" void __yield() {
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esp_schedule();
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esp_yield();
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}
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extern "C" void yield(void) __attribute__ ((weak, alias("__yield")));
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static void loop_wrapper() {
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static bool setup_done = false;
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if(!setup_done) {
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setup();
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setup_done = true;
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}
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preloop_update_frequency();
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loop();
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esp_schedule();
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}
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static void loop_task(os_event_t *events) {
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g_micros_at_task_start = system_get_time();
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cont_run(&g_cont, &loop_wrapper);
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if(cont_check(&g_cont) != 0) {
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ets_printf("\r\nheap collided with sketch stack\r\n");
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abort();
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}
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}
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static void do_global_ctors(void) {
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void (**p)(void);
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for(p = &__init_array_start; p != &__init_array_end; ++p)
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(*p)();
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}
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void init_done() {
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do_global_ctors();
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esp_schedule();
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}
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extern "C" {
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void user_init(void) {
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uart_div_modify(0, UART_CLK_FREQ / (115200));
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init();
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initVariant();
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cont_init(&g_cont);
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system_os_task(loop_task,
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LOOP_TASK_PRIORITY, g_loop_queue,
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LOOP_QUEUE_SIZE);
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system_init_done_cb(&init_done);
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}
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}
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