[参考译文] TMS320F28335：GPIO16_External 中断未工作

/**
 * @brief: External GPIO Interrupt ISR
 * @param[in]
 * @param[out]
 */
__interrupt void vGpioIntr1ISR(void)
{
    if(++u16Int1counter>2000)
    {
        GpioDataRegs.GPBTOGGLE.bit.GPIO36 = 1;
        u16Int1counter= 0;
    }
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

/**
 * @brief: External GPIO Interrupt ISR
 * @param[in]
 * @param[out]
 */
__interrupt void vGpioIntr2ISR(void)
{
    if(++u16Int2counter>2000)
    {
        GpioDataRegs.GPBTOGGLE.bit.GPIO36 = 1;
        u16Int2counter= 0;
    }

    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
/**
 * @brief: External GPIO Interrupt ISR
 * @param[in]
 * @param[out]
 */
__interrupt void vGpioIntr3ISR(void)
{
    if(++u16Int3counter>100)
    {
        GpioDataRegs.GPBTOGGLE.bit.GPIO50 = 1;
        u16Int3counter= 0;
    }

    PieCtrlRegs.PIEACK.all = PIEACK_GROUP12;
}




void vInitXInterruptConfig(void)
{
    //============================================= External Interrupt ==============================================================================================
    // External Interuupt
    //dsp_pwm_rx1 : GPIO12
    //dsp_pwm_rx2:  GPIO13
    //dsp_pwm_rx3:  GPIO16


    EALLOW;
    PieVectTable.XINT1 = &vGpioIntr1ISR;// register ISR in interrupt vector table
    PieVectTable.XINT2 = &vGpioIntr2ISR;
    PieVectTable.XINT3 = &vGpioIntr3ISR;
    EDIS;

    PieCtrlRegs.PIECTRL.bit.ENPIE  = 1;// Enable PIE block
    PieCtrlRegs.PIEIER1.bit.INTx4  = 1;// Enable PIE Group 1 INT4
    PieCtrlRegs.PIEIER1.bit.INTx5  = 1;// Enable PIE Group 1 INT5
    PieCtrlRegs.PIEIER1.bit.INTx6 = 1;// Enable PIE Group 1 INT6
    IER |= M_INT1;                    // Enable CPU interrupt 1
    EINT;                             // Enable Global Interrupt

    //
    // GPIO12, GPIO13 and GPIO16 are inputs
    //
    EALLOW;
    GpioCtrlRegs.GPAMUX1.bit.GPIO12 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO12 = 0;
    GpioCtrlRegs.GPAQSEL1.bit.GPIO12 = 0;         //Xint1 Synch to SYSCLKOUT only

    GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO13 = 0;
    GpioCtrlRegs.GPAQSEL1.bit.GPIO13 = 0;


    GpioCtrlRegs.GPAMUX2.bit.GPIO16 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO16 = 0;
    GpioCtrlRegs.GPAQSEL2.bit.GPIO16 = 0;

    //
    // Each sampling window is 510*SYSCLKOUT
    //
    GpioCtrlRegs.GPACTRL.bit.QUALPRD0 = QUAL_PERIOD_CONFIG;//Each Sample window is 510*SYSCLKOUT
    EDIS;

    EALLOW;

    GpioIntRegs.GPIOXINT1SEL.bit.GPIOSEL = 12;      //tag XINT1 interrupt with GPIO12
    GpioIntRegs.GPIOXINT2SEL.bit.GPIOSEL = 13;      //tag XINT2 interrupt with GPIO13
    GpioIntRegs.GPIOXINT3SEL.bit.GPIOSEL = 16;      //tag XINT3 interrupt with GPIO16
    EDIS;

    XIntruptRegs.XINT1CR.bit.POLARITY = 1;//Detect interrupt on rising edge of GPIO12
    XIntruptRegs.XINT2CR.bit.POLARITY = 1;//Detect interrupt on rising edge of GPIO13
    XIntruptRegs.XINT3CR.bit.POLARITY = 1;//Detect interrupt on rising edge of GPIO16

    XIntruptRegs.XINT1CR.bit.ENABLE = 1;  //Enable XINT1
    XIntruptRegs.XINT2CR.bit.ENABLE = 1;  //Enable XINT2
    XIntruptRegs.XINT3CR.bit.ENABLE = 1;  //Enable XINT3

}