[参考译文] TM4C1294KCPDT：看门狗计时器-TM4C1294KCPDT

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1108599/tm4c1294kcpdt-watchdog-timer--tm4c1294kcpdt

您好！

  在使用 TM4C1294KCPDT 控制器的库房板中，我需要为应用启用看门狗计时器。 我遵循 TI 示例看门狗计时器代码，中断每秒生成一次。 问题是当我将变量 g_bFeedWatchdog 用作"Zero" 控制器时，不会 复位，而是显示 “Device is locked up in Hardware fault"(设备锁定在硬件故障中)。 下面我附上了故障屏幕截图以及您的参考代码。 请告诉我编码是否有错误？

此致、

Rani  

volatile bool g_bFeedWatchdog = true;


void
WatchdogIntHandler(void)
{
    //
    // If we have been told to stop feeding the watchdog, return immediately
    // without clearing the interrupt.  This will cause the system to reset
    // next time the watchdog interrupt fires.
    //
    if(!g_bFeedWatchdog)
    {
        return;
    }

    //
    // Clear the watchdog interrupt.
    //
    MAP_WatchdogIntClear(WATCHDOG0_BASE);

    //
    // Invert the GPIO PN0 value.
    //
}

void watch_dog()
{
    //
       // Enable the peripherals used by this example.
       //
       MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_WDOG0);
       MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);

       //
       // Enable processor interrupts.
       //
       MAP_IntMasterEnable();

       //
       // Set GPIO PN0 as an output.  This drives an LED on the board that will
       // toggle when a watchdog interrupt is processed.
       //
       MAP_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0);
       MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, 0);

       //
       // Enable the watchdog interrupt.
       //
       MAP_IntEnable(INT_WATCHDOG);

       //
       // Set the period of the watchdog timer to 1 second.
       //
       MAP_WatchdogReloadSet(WATCHDOG0_BASE, (g_ui32SysClock));

       //
       // Enable reset generation from the watchdog timer.
       //
       MAP_WatchdogResetEnable(WATCHDOG0_BASE);

       //
       // Enable the watchdog timer.
       //
       MAP_WatchdogEnable(WATCHDOG0_BASE);
}