OSStatus mico_wdg_initialize( uint32_t timeout_ms )
{
#ifndef MICO_DISABLE_WATCHDOG
OSStatus err = kNoErr;
uint32_t wdt_mode, timeout_value;
/* Get timeout value. */
timeout_value = wdt_get_timeout_value(timeout_ms* 1000,
BOARD_FREQ_SLCK_XTAL);
require_action( timeout_value != WDT_INVALID_ARGUMENT, exit, err = kParamErr );
/* Configure WDT to trigger an interrupt (or reset). */
wdt_mode = WDT_MR_WDFIEN | /* Enable WDT fault interrupt. */
WDT_MR_WDRPROC | /* WDT fault resets processor only. */
WDT_MR_WDDBGHLT | /* WDT stops in debug state. */
WDT_MR_WDIDLEHLT; /* WDT stops in idle state. */
/* Initialize WDT with the given parameters. */
wdt_init(WDT, wdt_mode, timeout_value, timeout_value);
printf("Enable watchdog with %d microseconds period\n\r",
(int)wdt_get_us_timeout_period(WDT, BOARD_FREQ_SLCK_XTAL));
/* Configure and enable WDT interrupt. */
NVIC_DisableIRQ(WDT_IRQn);
NVIC_ClearPendingIRQ(WDT_IRQn);
NVIC_SetPriority(WDT_IRQn, 5);
NVIC_EnableIRQ(WDT_IRQn);
exit:
return err;
#else
UNUSED_PARAMETER( timeout_ms );
return kUnsupportedErr;
#endif
}
/**
* \brief Application entry point for wdt_irq example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint32_t wdt_mode, timeout_value;
/* Initialize the system */
sysclk_init();
board_init();
/* Configure pins of console UART, LED and push button on board. */
configure_console();
configure_led();
/* Output example information. */
puts(STRING_HEADER);
/* Initialize reset counter */
ul_rst_counter = RST_MS_COUNTER;
/* Systick configuration. */
puts("Configure systick to get 1ms tick period.\r");
if (SysTick_Config(sysclk_get_cpu_hz() / 1000)) {
puts("-F- Systick configuration error\r");
}
/* Get timeout value. */
timeout_value = wdt_get_timeout_value(WDT_PERIOD * 1000,
BOARD_FREQ_SLCK_XTAL);
if (timeout_value == WDT_INVALID_ARGUMENT) {
while (1) {
/* Invalid timeout value, error. */
}
}
/* Configure WDT to trigger an interrupt (or reset). */
wdt_mode = WDT_MR_WDFIEN | /* Enable WDT fault interrupt. */
WDT_MR_WDRPROC | /* WDT fault resets processor only. */
WDT_MR_WDDBGHLT | /* WDT stops in debug state. */
WDT_MR_WDIDLEHLT; /* WDT stops in idle state. */
/* Initialize WDT with the given parameters. */
wdt_init(WDT, wdt_mode, timeout_value, timeout_value);
printf("Enable watchdog with %d microseconds period\n\r",
(int)wdt_get_us_timeout_period(WDT, BOARD_FREQ_SLCK_XTAL));
/* Configure and enable WDT interrupt. */
NVIC_DisableIRQ(WDT_IRQn);
NVIC_ClearPendingIRQ(WDT_IRQn);
NVIC_SetPriority(WDT_IRQn, 0);
NVIC_EnableIRQ(WDT_IRQn);
printf("After %u seconds the system enters in a deadlock loop.\n\r", (int)ul_rst_counter/1000);
while (1) {
if (g_b_systick_event == true) {
g_b_systick_event = false;
/* Toggle LED at the given period. */
if ((g_ul_ms_ticks % BLINK_PERIOD) == 0) {
#if (SAM4CM)
LED_Toggle(LED4);
#else
LED_Toggle(LED0);
#endif
}
/* Restart watchdog at the given period. */
if ((g_ul_ms_ticks % WDT_RESTART_PERIOD) == 0) {
wdt_restart(WDT);
}
}
/* Simulate deadlock when reset counter is reset. */
if (!ul_rst_counter) {
puts("Program enters infinite loop for triggering watchdog interrupt.\r");
while (1) {
}
}
}
}
