CCS/TMS320F28377S: SCI-C problem

Tool/software: Code Composer Studio

Hi

Using the example I wrote programm for SCI-C and I have a problem.I use external rs232 to transfer data. When I set baud for 115200 or 57600 I receives 0. When I used lower baud (for example 9600) I receives correct values. Would you have any idea what is wrong with my code ?

Thank you for help

Best regards 

Szymon

#include "F28x_Project.h"


Uint16 LoopCount;
Uint16 ErrorCount;


void scia_loopback_init(void);
void scia_fifo_init(void);
void scia_xmit(int a);
void error();


void main(void)
{
    Uint16 SendChar;
    Uint16 ReceivedChar;


    InitSysCtrl();


   InitGpio();



   EALLOW;
       GpioCtrlRegs.GPCMUX2.bit.GPIO89 = 2;        //    tx
       GpioCtrlRegs.GPCMUX2.bit.GPIO90 = 2;       //   rx
       GpioCtrlRegs.GPCGMUX2.bit.GPIO89 = 1;     //   tx
       GpioCtrlRegs.GPCGMUX2.bit.GPIO90 = 1;    //   rx



    DINT;
    IER = 0x0000;
    IFR = 0x0000;

    InitPieVectTable();


    EnableInterrupts();


    LoopCount = 0;
    ErrorCount = 0;

    scia_fifo_init();       // Initialize the SCI FIFO
    scia_loopback_init();  // Initialize SCI for digital loop back


    SendChar = 0xAF;


//
    for(;;)
    {
       scia_xmit(SendChar);

       //
       // wait for RRDY/RXFFST =1 for 1 data available in FIFO
       //
       while(ScicRegs.SCIFFRX.bit.RXFFST == 0) { }

       //
       // Check received character
       //
       ReceivedChar = ScicRegs.SCIRXBUF.all;
       if(ReceivedChar != SendChar)
       {
           error();
       }


       LoopCount++;
    }
}

//
// error - Function to count errors
//
void error()
{
    ErrorCount++;
//   asm("     ESTOP0");  // Uncomment to stop the test here
//   for (;;);
}

//
// scia_loopback_init - Configure SCIA settings
//
void scia_loopback_init()
{
    //
    // Note: Clocks were turned on to the SCIA peripheral
    // in the InitSysCtrl() function
    //

    ScicRegs.SCICCR.all = 0x0007;  // 1 stop bit,  No loopback
                                   // No parity,8 char bits,
                                   // async mode, idle-line protocol
    ScicRegs.SCICTL1.all = 0x0003; // enable TX, RX, internal SCICLK,
                                   // Disable RX ERR, SLEEP, TXWAKE
    ScicRegs.SCICTL2.all = 0x0003;
    ScicRegs.SCICTL2.bit.TXINTENA = 1;
    ScicRegs.SCICTL2.bit.RXBKINTENA = 1;
    ScicRegs.SCIHBAUD.all = 0x03; //for 115200  9600 - 0x02
    ScicRegs.SCILBAUD.all = 0x06; //for 115200  9600 - 0x8B
    ScicRegs.SCICCR.bit.LOOPBKENA = 1; // Enable loop back
    ScicRegs.SCICTL1.all = 0x0023;     // Relinquish SCI from Reset
}

//
// scia_xmit - Transmit a character from the SCI
//
void scia_xmit(int a)
{
    ScicRegs.SCITXBUF.all=a;
}

//
// scia_fifo_init - Initialize the SCI FIFO
//
void scia_fifo_init()
{
    ScicRegs.SCIFFTX.all = 0xE040;
    ScicRegs.SCIFFRX.all = 0x2044;
    ScicRegs.SCIFFCT.all = 0x0;
}