watchdog.c File Reference

#include <esp8266.h>
#include "driver/gpio16.h"
#include "watchdog.h"
#include "unix_time.h"
#include "wifi.h"
#include "config.h"
#include "led.h"
#include "debug.h"

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Data Structures
struct	watchdog_t

Functions
ICACHE_FLASH_ATTR static void	ext_watchdog_timer_func (void *arg)
ICACHE_FLASH_ATTR static void	wifi_reconnect_timer_func (void *arg)
ICACHE_FLASH_ATTR static void	watchdog_timer_func (void *arg)
ICACHE_FLASH_ATTR void	init_watchdog ()
ICACHE_FLASH_ATTR void	start_watchdog ()
ICACHE_FLASH_ATTR void	stop_watchdog ()
ICACHE_FLASH_ATTR bool	add_watchdog (uint32_t id, watchdog_type_t type, uint32_t timeout)
ICACHE_FLASH_ATTR bool	remove_watchdog (uint32_t id)
ICACHE_FLASH_ATTR void	reset_watchdog (uint32_t id)

Variables
static os_timer_t	watchdog_timer
static os_timer_t	ext_watchdog_timer
static os_timer_t	wifi_reconnect_timer
watchdog_t	watchdog_list [WATCHDOG_MAX]
volatile uint8_t	watchdog_list_len

Function Documentation

add_watchdog()

ICACHE_FLASH_ATTR bool add_watchdog	(	uint32_t	id,
		watchdog_type_t	type,
		uint32_t	timeout
	)

Definition at line 155 of file watchdog.c.

References get_uptime(), watchdog_t::id, watchdog_t::last_reset, os_printf, watchdog_t::timeout, watchdog_t::type, watchdog_list_len, and WATCHDOG_MAX.

                                                                                         {  
    if (watchdog_list_len < WATCHDOG_MAX) {
#ifdef DEBUG
        os_printf("add watchdog, id: %d\n", id);
#endif
        watchdog_list[watchdog_list_len].id = id;
        watchdog_list[watchdog_list_len].type = type;
        watchdog_list[watchdog_list_len].timeout = timeout;
        watchdog_list[watchdog_list_len].last_reset = get_uptime();
        watchdog_list_len++;
        return true;
    }
    else {
#ifdef DEBUG
        os_printf("watchdog error, cant add more\n");
#endif
        return false;
    }
}

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ext_watchdog_timer_func()

ICACHE_FLASH_ATTR static void ext_watchdog_timer_func ( void *  arg )

static

Definition at line 25 of file watchdog.c.

References gpio16_input_get(), and gpio16_output_set().

Referenced by start_watchdog().

                                                                 {
    if (gpio16_input_get()) {
        gpio16_output_set(0);
    }
    else {
        gpio16_output_set(1);
    }
}

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init_watchdog()

ICACHE_FLASH_ATTR void init_watchdog

(

)

Definition at line 125 of file watchdog.c.

References memset, and watchdog_list_len.

                                       {
    memset(watchdog_list, 0x00, sizeof(watchdog_list));
    watchdog_list_len = 0;
}

remove_watchdog()

ICACHE_FLASH_ATTR bool remove_watchdog

(

uint32_t

id

)

Definition at line 175 of file watchdog.c.

References watchdog_t::id, NOT_ENABLED, os_printf, watchdog_t::timeout, watchdog_t::type, and watchdog_list_len.

                                                    {
    if (watchdog_list_len > 0) {
#ifdef DEBUG
        os_printf("remove watchdog, id: %d\n", id);
#endif
        watchdog_list[watchdog_list_len].id = 0;
        watchdog_list[watchdog_list_len].type = NOT_ENABLED;
        watchdog_list[watchdog_list_len].timeout = 0;
        watchdog_list_len--;
        return true;
    }
    else {
#ifdef DEBUG
        os_printf("watchdog error, cant remove %d\n", id);
#endif
        return false;
    }
}

reset_watchdog()

ICACHE_FLASH_ATTR void reset_watchdog

(

uint32_t

id

)

Definition at line 194 of file watchdog.c.

References get_uptime(), watchdog_t::last_reset, os_printf, and WATCHDOG_MAX.

                                                   {
    uint32_t i;
    
#ifdef DEBUG
    os_printf("reset watchdog, id: %d\n", id);
#endif          
    for (i = 0; i < WATCHDOG_MAX; i++) {
        if (watchdog_list[i].id == id) {
            watchdog_list[i].last_reset = get_uptime();
        }
    }
}

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start_watchdog()

ICACHE_FLASH_ATTR void start_watchdog

(

)

Definition at line 130 of file watchdog.c.

References ext_watchdog_timer, ext_watchdog_timer_func(), gpio16_output_conf(), gpio16_output_set(), NULL, os_printf, os_timer_arm, os_timer_disarm, os_timer_func_t, os_timer_setfn, watchdog_timer, and watchdog_timer_func().

                                        {
#ifdef DEBUG
    os_printf("watchdog started\n");
#endif
    // start configurable software watchdog system
    os_timer_disarm(&watchdog_timer);
    os_timer_setfn(&watchdog_timer, (os_timer_func_t *)watchdog_timer_func, NULL);
    os_timer_arm(&watchdog_timer, 1000, 1);

    // start extern watchdog timer  (MCP1316)
    os_timer_disarm(&ext_watchdog_timer);
    os_timer_setfn(&ext_watchdog_timer, (os_timer_func_t *)ext_watchdog_timer_func, NULL);
    os_timer_arm(&ext_watchdog_timer, 1000, 1);
    //Set GPIO16 to output mode
    gpio16_output_conf();
    gpio16_output_set(1);   
}

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stop_watchdog()

ICACHE_FLASH_ATTR void stop_watchdog

(

)

Definition at line 148 of file watchdog.c.

References ext_watchdog_timer, os_printf, and os_timer_disarm.

                                       {
#ifdef DEBUG
    os_printf("watchdog stopped\n");
#endif
    os_timer_disarm(&ext_watchdog_timer);
}

watchdog_timer_func()

ICACHE_FLASH_ATTR static void watchdog_timer_func ( void *  arg )

static

Definition at line 72 of file watchdog.c.

References ext_watchdog_timer, get_uptime(), watchdog_t::last_reset, led_pattern_b(), NETWORK_RESTART, NETWORK_RESTART_DELAY, NOT_ENABLED, NULL, NULL_MODE, os_printf, os_timer_arm, os_timer_disarm, os_timer_func_t, os_timer_setfn, REBOOT, REBOOT_VIA_EXT_WD, set_my_auto_connect(), system_restart(), WATCHDOG_MAX, wifi_reconnect_timer, wifi_reconnect_timer_func(), wifi_set_opmode_current(), wifi_station_disconnect(), and wifi_stop_scan().

Referenced by start_watchdog().

                                                             {
    uint32_t i;
    uint32_t uptime;
    
    uptime = get_uptime();
//  if (uptime) {   // only run watchdog if we have unix time
    for (i = 0; i < WATCHDOG_MAX; i++) {
        if ((watchdog_list[i].type != NOT_ENABLED) && 
            (watchdog_list[i].last_reset) && 
            ((int32_t)watchdog_list[i].last_reset < (int32_t)(uptime - watchdog_list[i].timeout))) {
#ifdef DEBUG
            os_printf("watchdog timeout, id: %d\n", watchdog_list[i].id);
#endif          
            switch (watchdog_list[i].type) {
                case REBOOT:
                    system_restart();
#ifdef DEBUG
                    os_printf("reboot\n");
#endif  
                    break;
                    
                case NETWORK_RESTART:
                    // DEBUG: hack to get it to reconnect on weak wifi
                    // force reconnect to wireless
                    led_pattern_b();    // DEBUG to se if we ever try to restart network
                    wifi_stop_scan();
                    set_my_auto_connect(false);
                    wifi_station_disconnect();
                    wifi_set_opmode_current(NULL_MODE);
#ifdef DEBUG
                    os_printf("stopped wifi and wifi scanner\n");
#endif              
                    // and (re)-connect when last wifi scan is done - wait 6 second before starting
                    os_timer_disarm(&wifi_reconnect_timer);
                    os_timer_setfn(&wifi_reconnect_timer, (os_timer_func_t *)wifi_reconnect_timer_func, NULL);
                    os_timer_arm(&wifi_reconnect_timer, NETWORK_RESTART_DELAY, 0);
#ifdef DEBUG
                    os_printf("scheduled wifi for restart...\n");
#endif  
                    break;
                    
                case REBOOT_VIA_EXT_WD:
                    os_timer_disarm(&ext_watchdog_timer);
#ifdef DEBUG
                    os_printf("reboot via ext watchdog\n");
#endif  
                    break;
            }
            watchdog_list[i].last_reset = get_uptime();
        }
    }
}

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wifi_reconnect_timer_func()

ICACHE_FLASH_ATTR static void wifi_reconnect_timer_func ( void *  arg )

static

Definition at line 34 of file watchdog.c.

References syscfg_t::ap_enabled, led_stop_pattern(), NULL, os_printf, os_timer_arm, os_timer_disarm, os_timer_func_t, os_timer_setfn, set_my_auto_connect(), STATION_MODE, STATIONAP_MODE, sys_cfg, wifi_get_opmode(), wifi_reconnect_timer, wifi_scan_is_running(), wifi_set_opmode_current(), wifi_start_scan(), and wifi_station_connect().

Referenced by watchdog_timer_func().

                                                                   {
    if (wifi_scan_is_running()) {
        // reschedule if wifi scan is running
        os_timer_disarm(&wifi_reconnect_timer);
        os_timer_setfn(&wifi_reconnect_timer, (os_timer_func_t *)wifi_reconnect_timer_func, NULL);
        os_timer_arm(&wifi_reconnect_timer, 1000, 0);       
#ifdef DEBUG
        os_printf("scanner still running - rescheduling reccont\n");
#endif  
    }
    else {
        os_timer_disarm(&wifi_reconnect_timer);
#ifdef AP
        if (sys_cfg.ap_enabled) {
            if (wifi_get_opmode() != STATIONAP_MODE) {
                wifi_set_opmode_current(STATIONAP_MODE);
            }
        }
        else {
            if (wifi_get_opmode() != STATION_MODE) {
                wifi_set_opmode_current(STATION_MODE);
            }
        }
#else
        if (wifi_get_opmode() != STATION_MODE) {
            wifi_set_opmode_current(STATION_MODE);
        }
#endif  // AP
        led_stop_pattern(); // DEBUG
        set_my_auto_connect(true);
        wifi_station_connect();
        wifi_start_scan();
#ifdef DEBUG
        os_printf("watchdog restarted wifi and started wifi scanner\n");
#endif  
    }
}

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Variable Documentation

ext_watchdog_timer

os_timer_t ext_watchdog_timer

static

Definition at line 12 of file watchdog.c.

Referenced by start_watchdog(), stop_watchdog(), and watchdog_timer_func().

watchdog_list

watchdog_t watchdog_list[WATCHDOG_MAX]

Definition at line 22 of file watchdog.c.

watchdog_list_len

volatile uint8_t watchdog_list_len

Definition at line 23 of file watchdog.c.

Referenced by add_watchdog(), init_watchdog(), and remove_watchdog().

watchdog_timer

os_timer_t watchdog_timer

static

Definition at line 11 of file watchdog.c.

Referenced by start_watchdog().

wifi_reconnect_timer

os_timer_t wifi_reconnect_timer

static

Definition at line 13 of file watchdog.c.

Referenced by watchdog_timer_func(), and wifi_reconnect_timer_func().