[参考译文] TM4C129XNCZAD：我想在 tn4c129XNCZAD 中实现 RTC

您好、

 您是否能够在 C：\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\hiberate 或 C：\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\hiberate_calendar 中引用休眠示例。 这两个示例使用 RTC 从休眠模式唤醒。 以下是在五秒内设置 RTC 以进行唤醒的代码片段。  

int
main(void)
{
    uint32_t ui32Status;

    //
    // Run from the PLL at 120 MHz.
    // Note: SYSCTL_CFG_VCO_240 is a new setting provided in TivaWare 2.2.x and
    // later to better reflect the actual VCO speed due to SYSCTL#22.
    //
    g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                             SYSCTL_OSC_MAIN |
                                             SYSCTL_USE_PLL |
                                             SYSCTL_CFG_VCO_240), 120000000);

    //
    // Enable the hibernate module.
    //
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);

    //
    // Read and clear any status bits that might have been set since
    // last clearing them.
    //
    if(MAP_HibernateIsActive())
    {
        //
        // Read the status bits to see what caused the wake.
        //
        ui32Status = MAP_HibernateIntStatus(0);
        MAP_HibernateIntClear(ui32Status);
    }

    //
    // Set up the serial console to use for displaying messages.
    //
    ConfigureUART();
    UARTprintf("Hibernation with RTC Wake Example.\n");

    //
    // Enable the GPIO peripheral for on-board LEDs.
    //
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);

    //
    // Configure the GPIOs for LEDs D1 and D2.
    //
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_1 | GPIO_PIN_0);

    //
    // Enable the Hibernation module for operation.
    //
    MAP_HibernateEnableExpClk(0);

    //
    // Wait for 32.768kHz clock to stabilize.
    //
    while(!(HWREG(HIB_RIS) & HIB_RIS_WC));

    //
    // Configure the drive strength for the crystal.
    //
    MAP_HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);

    //
    // Enable the Hibernate module RTC mode.
    //
    MAP_HibernateRTCEnable();

    //
    // Load initial RTC value.
    //
    MAP_HibernateRTCSet(0);

    //
    // Set initial match value to trigger RTC after 5 seconds.
    //
    MAP_HibernateRTCMatchSet(0, 5);

    //
    // Enable RTC match interrupt.
    //
    MAP_HibernateIntEnable(HIBERNATE_INT_RTC_MATCH_0);

    //
    // Configure MCU interrupts.
    //
    MAP_IntEnable(INT_HIBERNATE_TM4C129);

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

    //
    // Turn on LED D1.
    //
    MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_1, GPIO_PIN_1);

    //
    // Enter Hibernation Mode.
    //
    UARTprintf("Entering Hiberation, waking in 5 seconds.\n");
    MAP_HibernateRequest();

    while(1)
    {
        //
        // Do nothing, Hibernate interrupt routine will handle the rest.
        //
    }
}