CCS/TMS320F28027F: SCI receive

You need to make sure the TX/RX pins are connected properly for the devices you are using the SCI pins you are using. You also need to make sure both are using the same baud rate.

sal

Thanks for suggesting me.

But still I am unable to get signal on Rx pin on c2000 launchpad (28027F)

Register configuration are as follows:

void scia_init()

{

   // Note: Clocks were turned on to the SCIA peripheral

   // in the InitSysCtrl() func tion

   SciaRegs.SCICCR.all =0x0007;   // 1 stop bit,  No loopback

                                  // No parity,8 char bits,

                                  // async mode, idle-line protocol

   SciaRegs.SCICTL1.all =0x0003;  // enable TX, RX, internal SCICLK,

                                  // Disable RX ERR, SLEEP, TXWAKE

   SciaRegs.SCICTL1.bit.RXENA=1;

   SciaRegs.SCICTL1.bit.TXENA=1;

   SciaRegs.SCICTL2.all =0x0003;

   SciaRegs.SCICTL2.bit.TXINTENA =1;

   SciaRegs.SCICTL2.bit.RXBKINTENA=1;

   // SCI BRR = LSPCLK/(SCI BAUDx8) - 1

    SciaRegs.SCIHBAUD    =0x0000;  // 250K @ LSPCLK = 10Mhz

    SciaRegs.SCILBAUD    =0x0004;

    SciaRegs.SCICTL1.all =0x0023;  // Relinquish SCI from Reset

}

void sciSend(Uint32 length, uint8 * data)

{

   while((length--)>0U)

   {

       // while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}

       // SciaRegs.SCITXBUF=*data;

        //*data++;

      while(SciaRegs.SCICTL2.bit.TXRDY==0){}

      SciaRegs.SCITXBUF=*data;

      *data++;

   }

}

void sciReceive(Uint32 length, uint8 *data)

{

   while((length--)>0U)

   {

     // while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { }

     // while(SciaRegs.SCIFFRX.bit.RXFFST==0) {}

     // *data = (uint8)(SciaRegs.SCIRXBUF.all);

     // *data++;

    //  SciaRegs.SCICTL1.bit.SWRESET=0;

       while(SciaRegs.SCIRXST.bit.RXRDY !=1) {}

       //while(SciaRegs.SCIRXST.bit.RXRDY=0) {}

      *data=(uint8)(SciaRegs.SCIRXBUF.all);

      *data++;

   }

}

void scia_fifo_init()

{

   SciaRegs.SCIFFTX.all=0xE040;

   SciaRegs.SCIFFRX.all=0x2044;

   SciaRegs.SCIFFCT.all=0x0;

}

Send function is working correctly .

Please help me to find why receiving is not working . Actually its getting stopped at highlighted line.

Thank you in advance. 

Please use a oscilliscope to ensure that the data is reaching the C2000 RX pin.

sal

Sorry for late reply,
I have checked with CRO.
The problem is I am using idle line mode on SCI but i am getting signal from device which has regular UART, is this configuration receive 8-N-1 standard UART signal without any problem. SLEEP=0, TXWAKE=0;
thanks in advanced.

8-N-1 is standard.

I want to say , Will that configuration receive regular UART signal.

I am not sure what you mean? Please consider the examples in controlSUITE and C2000Ware again.
sal