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- /*
- * The MySensors Arduino library handles the wireless radio link and protocol
- * between your home built sensors/actuators and HA controller of choice.
- * The sensors forms a self healing radio network with optional repeaters. Each
- * repeater and gateway builds a routing tables in EEPROM which keeps track of the
- * network topology allowing messages to be routed to nodes.
- *
- * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
- * Copyright (C) 2013-2018 Sensnology AB
- * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
- *
- * Documentation: http://www.mysensors.org
- * Support Forum: http://forum.mysensors.org
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- */
-
- //This may be used to change user task stack size:
- //#define CONT_STACKSIZE 4096
- #include <Arduino.h>
- #include "Schedule.h"
- extern "C" {
- #include "ets_sys.h"
- #include "os_type.h"
- #include "osapi.h"
- #include "mem.h"
- #include "user_interface.h"
- #include "cont.h"
- }
- #include <core_version.h>
- #include "gdb_hooks.h"
-
- #define LOOP_TASK_PRIORITY 1
- #define LOOP_QUEUE_SIZE 1
- #define OPTIMISTIC_YIELD_TIME_US 16000
-
- extern "C" void call_user_start();
- extern void loop();
- extern void setup();
- extern void(*__init_array_start)(void);
- extern void(*__init_array_end)(void);
-
- /* Not static, used in Esp.cpp */
- struct rst_info resetInfo;
-
- /* Not static, used in core_esp8266_postmortem.c.
- * Placed into noinit section because we assign value to this variable
- * before .bss is zero-filled, and need to preserve the value.
- */
- cont_t* g_pcont __attribute__((section(".noinit")));
-
- /* Event queue used by the main (arduino) task */
- static os_event_t s_loop_queue[LOOP_QUEUE_SIZE];
-
- /* Used to implement optimistic_yield */
- static uint32_t s_micros_at_task_start;
-
-
- extern "C" {
- extern const uint32_t __attribute__((section(".ver_number"))) core_version =
- ARDUINO_ESP8266_GIT_VER;
- const char* core_release =
- #ifdef ARDUINO_ESP8266_RELEASE
- ARDUINO_ESP8266_RELEASE;
- #else
- NULL;
- #endif
- } // extern "C"
-
- void initVariant() __attribute__((weak));
- void initVariant()
- {
- }
-
- void preloop_update_frequency() __attribute__((weak));
- void preloop_update_frequency()
- {
- #if defined(F_CPU) && (F_CPU == 160000000L)
- REG_SET_BIT(0x3ff00014, BIT(0));
- ets_update_cpu_frequency(160);
- #endif
- }
-
-
- extern "C" void esp_yield()
- {
- if (cont_can_yield(g_pcont)) {
- cont_yield(g_pcont);
- }
- }
-
- extern "C" void esp_schedule()
- {
- ets_post(LOOP_TASK_PRIORITY, 0, 0);
- }
-
- extern "C" void __yield()
- {
- if (cont_can_yield(g_pcont)) {
- esp_schedule();
- esp_yield();
- } else {
- panic();
- }
- }
-
- extern "C" void yield(void) __attribute__((weak, alias("__yield")));
-
- extern "C" void optimistic_yield(uint32_t interval_us)
- {
- if (cont_can_yield(g_pcont) &&
- (system_get_time() - s_micros_at_task_start) > interval_us) {
- yield();
- }
- }
-
- static void loop_wrapper()
- {
- static bool setup_done = false;
- preloop_update_frequency();
- if (!setup_done) {
- _begin(); // Startup MySensors library
- setup_done = true;
- }
- _process(); // Process incoming data
- loop();
- run_scheduled_functions();
- esp_schedule();
- }
-
- static void loop_task(os_event_t *events)
- {
- (void)events;
- s_micros_at_task_start = system_get_time();
- cont_run(g_pcont, &loop_wrapper);
- if (cont_check(g_pcont) != 0) {
- panic();
- }
- }
-
- static void do_global_ctors(void)
- {
- void(**p)(void) = &__init_array_end;
- while (p != &__init_array_start) {
- (*--p)();
- }
- }
-
- void init_done()
- {
- system_set_os_print(1);
- gdb_init();
- do_global_ctors();
- esp_schedule();
- }
-
- /* This is the entry point of the application.
- * It gets called on the default stack, which grows down from the top
- * of DRAM area.
- * .bss has not been zeroed out yet, but .data and .rodata are in place.
- * Cache is not enabled, so only ROM and IRAM functions can be called.
- * Peripherals (except for SPI0 and UART0) are not initialized.
- * This function does not return.
- */
- /*
- A bit of explanation for this entry point:
-
- SYS is the SDK task/context used by the upperlying system to run its
- administrative tasks (at least WLAN and lwip's receive callbacks and
- Ticker). NONOS-SDK is designed to run user's non-threaded code in
- another specific task/context with its own stack in BSS.
-
- Some clever fellows found that the SYS stack was a large and quite unused
- piece of ram that we could use for the user's stack instead of using user's
- main memory, thus saving around 4KB on ram/heap.
-
- A problem arose later, which is that this stack can heavily be used by
- the SDK for some features. One of these features is WPS. We still don't
- know if other features are using this, or if this memory is going to be
- used in future SDK releases.
-
- WPS beeing flawed by its poor security, or not beeing used by lots of
- users, it has been decided that we are still going to use that memory for
- user's stack and disable the use of WPS, with an option to revert that
- back at the user's discretion. This selection can be done with the
- global define NO_EXTRA_4K_HEAP. An option has been added to the board
- generator script.
-
- References:
- https://github.com/esp8266/Arduino/pull/4553
- https://github.com/esp8266/Arduino/pull/4622
- https://github.com/esp8266/Arduino/issues/4779
- https://github.com/esp8266/Arduino/pull/4889
-
- */
-
- #ifdef NO_EXTRA_4K_HEAP
- /* this is the default NONOS-SDK user's heap location */
- cont_t g_cont __attribute__((aligned(16)));
- #endif
-
- extern "C" void ICACHE_RAM_ATTR app_entry(void)
- {
- #ifdef NO_EXTRA_4K_HEAP
-
- /* this is the default NONOS-SDK user's heap location */
- g_pcont = &g_cont;
-
- #else
-
- /* Allocate continuation context on this SYS stack,
- and save pointer to it. */
- cont_t s_cont __attribute__((aligned(16)));
- g_pcont = &s_cont;
-
- #endif
-
- /* Call the entry point of the SDK code. */
- call_user_start();
- }
-
- extern "C" void user_init(void)
- {
- struct rst_info *rtc_info_ptr = system_get_rst_info();
- memcpy((void *)&resetInfo, (void *)rtc_info_ptr, sizeof(resetInfo));
-
- uart_div_modify(0, UART_CLK_FREQ / (115200));
-
- init();
-
- initVariant();
-
- cont_init(g_pcont);
-
- ets_task(loop_task,
- LOOP_TASK_PRIORITY, s_loop_queue,
- LOOP_QUEUE_SIZE);
-
- system_init_done_cb(&init_done);
- }
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