F28069<==> PC via SCI, RX does not work ,but TX works fine

Other Parts Discussed in Thread: CONTROLSUITE, MOTORWARE, TMDSCNCD28069ISO

I am using TMDSCNCD28069MISO controlCARD.

I modify those sample code (echoback/loopback in controlSUITE).

When I use the loopback function in my code, RX and TX work fine.

When I close loopback function, I can transmit data from DSP to PC, but i am unable to receive anything from PC. My code halt this line

while(SCI_getRxFifoStatus(obj4->sciHandle[0]) != 256) { }. The ReceivedChar variable value also 0.

I can't figure out what I am doing wrong.

Please help. Thanks a lot.

Below is my code.

GIPO setting:

// GPIO28

GPIO_setPullup(obj->gpioHandle, GPIO_Number_28, GPIO_Pullup_Enable);

GPIO_setQualification(obj->gpioHandle, GPIO_Number_28); //GPIO_Qual_ASync

GPIO_setMode(obj->gpioHandle,GPIO_Number_28,GPIO_28_Mode_SCIRXDA);

// GPIO29

GPIO_setPullup(obj->gpioHandle, GPIO_Number_29, GPIO_Pullup_Enable);

GPIO_setMode(obj->gpioHandle,GPIO_Number_29,GPIO_29_Mode_SCITXDA);

SCI setting:

void HAL_setupScis(HAL_Handle handle)

{

        HAL_Obj  *obj = (HAL_Obj *)handle;

        SCI_resetChannels(obj->sciHandle[0]);

        SCI_resetTxFifo(obj->sciHandle[0]);

        SCI_enableTxFifoEnh(obj->sciHandle[0]);

        SCI_clearTxFifoInt(obj->sciHandle[0]);

        SCI_enableRxFifo(obj->sciHandle[0]);

        SCI_clearRxFifoInt(obj->sciHandle[0]);

        SCI_setRxFifoIntLevel(obj->sciHandle[0],SCI_FifoLevel_4_Words);

        SCI_setCharLength(obj->sciHandle[0],SCI_CharLength_8_Bits);

        SCI_enableTx(obj->sciHandle[0]);

        SCI_enableRx(obj->sciHandle[0]);

        SCI_setBaudRate(obj->sciHandle[0],SCI_BaudRate_230400_Baud);

        SCI_setPriority(obj->sciHandle[0],SCI_Priority_FreeRun);

        SCI_enable(obj->sciHandle[0]);

        SCI_enableTx(obj->sciHandle[0]);

        SCI_enableRx(obj->sciHandle[0]);

}

main fuction:

for(;;)

{

        if(a==1)

        {

                scia_xmit(SendChar);

                HAL_Obj *obj4 = (HAL_Obj *)halHandle;

                while(SCI_getRxFifoStatus(obj4->sciHandle[0]) != 256) { } // wait  for RRDY/RXFFST =1 for 1 data available in FIFO

                //Check received character

                ReceivedChar = SCI_read(obj4->sciHandle[0]);

                // Move to the next character and repeat the test

                SendChar=SendChar+1;

                //Limit the character to 8-bits

                SendChar &= 0x00FF;

        }

} // end of for(;;) loop