[参考译文] TM4C1294NCPDT：PWM：LED 自动闪烁

int
main(void)
{
    uint32_t ui32PWMClockRate;


    g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                             SYSCTL_OSC_MAIN |
                                             SYSCTL_USE_OSC
                                             ), 25000000);

    //
    // Initialize the UART.
    //
    ConfigureUART();



    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);


    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);


    MAP_GPIOPinConfigure(GPIO_PF0_M0PWM0);
    MAP_GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_0);


    MAP_PWMClockSet(PWM0_BASE, PWM_SYSCLK_DIV_64);

    ui32PWMClockRate = g_ui32SysClock / 64;


    MAP_PWMGenConfigure(PWM0_BASE, PWM_GEN_0,
                        PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);


    MAP_PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, (ui32PWMClockRate / 8));

    MAP_PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0,
                         MAP_PWMGenPeriodGet(PWM0_BASE, PWM_GEN_0) / 2);


    MAP_PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, true);


    MAP_PWMGenEnable(PWM0_BASE, PWM_GEN_0);


    while(1)
    {

    }
}