请教:6455点亮不了LED

我在设计里将TMS320C6455的复用管脚接了一个LED,如图所示,却点亮不了,请问是怎么回事?是6455不能直接点亮LED吗?

程序如下所示:

Int main()

{

    Bool                 gpioEn;

    CSL_Status           status;

    CSL_GpioContext pContext;

    CSL_GpioObj          gpioObj;

    CSL_GpioHwSetup      hwSetup;

    CSL_GpioPinConfig    config, config1;

    CSL_GpioPinNum      pinNum, pinNum1;

    /* Unlock the control register */

    CSL_FINST(((CSL_DevRegs*)CSL_DEV_REGS)->PERLOCK, DEV_PERLOCK_LOCKVAL,

              UNLOCK);

    /* Enable the GPIO */

    CSL_FINST(((CSL_DevRegs*)CSL_DEV_REGS)->PERCFG0, DEV_PERCFG0_GPIOCTL,

              ENABLE);

    *PerCfg0 = ( *PerCfg0 & ~0x00000400u) | ( ( 0x00000001u << 0x0000000Au ) & 0x00000400u );

    do {

        gpioEn = (Bool) CSL_FEXT(((CSL_DevRegs*)CSL_DEV_REGS)->PERSTAT0,

                                   DEV_PERSTAT0_GPIOSTAT);

    } while (gpioEn != TRUE);

    CSL_gpioInit( &pContext );

    hGpio = CSL_gpioOpen( &gpioObj, CSL_GPIO, NULL, &status );

    hwSetup.extendSetup = NULL;

    CSL_gpioHwSetup( hGpio, &hwSetup );

    config1.pinNum = CSL_GPIO_PIN13;

    config1.trigger = CSL_GPIO_TRIG_RISING_EDGE;

    config1.direction = CSL_GPIO_DIR_OUTPUT;

    CSL_gpioHwControl( hGpio, CSL_GPIO_CMD_CONFIG_BIT, &config1 );

    pinNum1 = CSL_GPIO_PIN13;

    status = CSL_gpioHwControl( hGpio, CSL_GPIO_CMD_SET_BIT, &pinNum1 );

    Hwi_enableInterrupt(5);

    Hwi_enable();

    BIOS_start();    /* does not return */

    return(0);

}