wdt_utils.c
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/*
* Copyright (C) 2020-2021 Université Grenoble Alpes
*/
#define ENABLE_DEBUG (1)
#include "debug.h"
#include "xtimer.h"
#include <string.h>
#include "periph/wdt.h"
#ifndef WDT_UTILS_KICK_PERIOD
#define WDT_UTILS_KICK_PERIOD 4 // sec
#endif
#ifndef WDT_UTILS_TIMEOUT
#define WDT_UTILS_TIMEOUT 10000 // msec
#endif
#ifndef THREAD_STACKSIZE_WDT
#define THREAD_STACKSIZE_WDT THREAD_STACKSIZE_DEFAULT
#endif
// TODO mutex for started
static bool started = false;
static char wdt_thread_stack[THREAD_STACKSIZE_WDT]; // (THREAD_STACKSIZE_DEFAULT + THREAD_EXTRA_STACKSIZE_PRINTF)
static void *wdt_thread_func(void *arg){
(void)(arg);
puts("WDT started");
started = true;
wdt_setup_reboot(0, WDT_UTILS_TIMEOUT);
wdt_start();
while(started) {
//puts("WDT kicked");
wdt_kick();
xtimer_sleep(WDT_UTILS_KICK_PERIOD);
}
#if WDT_HAS_STOP
puts("WDT stopped");
wdt_stop();
#endif
// for preventing several "wdt stop"
started = false;
return NULL;
}
/*
* @brief wdt command
*
* @param argc
* @param argv
*/
int wdt_cmd(int argc, char *argv[]) {
if (argc == 2) {
if (strstr(argv[1], "start") != NULL) {
if(started) {
puts("WDT already started");
return -1;
} else {
/* start the wdt thread */
thread_create(wdt_thread_stack, sizeof(wdt_thread_stack),
THREAD_PRIORITY_MAIN - 1, 0, wdt_thread_func, NULL, "WDT");
return 0;
}
}
#if WDT_HAS_STOP
if (strstr(argv[1], "stop") != NULL) {
if(!started) {
puts("WDT already stopped");
return -1;
} else {
puts("WDT stopping");
started = false;
return 0;
}
}
#endif
}
#if WDT_HAS_STOP
puts("usage: wdt <start|stop>");
#else
puts("usage: wdt <start>");
#endif
return -1;
}