F28377S SCI Issue with transmitting (LAUNCHXL-F28377S)

Other Parts Discussed in Thread: CONTROLSUITE

Hi Everyone!

I am new to F28377S device, I got LAUNCHXL-F28377S to get started. I met an issue with transmitting messages from the board to PC. I am trying to send two test strings "abc" and "def". I used example sci_echoback from the controlSUITE v191, CCS version is 6.1.3.00033 . Here is a code:

#include "F28x_Project.h"

void scic_echoback_init(void);
void scic_fifo_init(void);
void scic_xmit(int a);
void scic_msg(char *msg);

void main(void)
{
   char *msg;

   InitSysCtrl();
   InitGpio();

   GPIO_SetupPinMux(62, GPIO_MUX_CPU1, 1);
   GPIO_SetupPinOptions(62, GPIO_INPUT, GPIO_PUSHPULL);
   GPIO_SetupPinMux(63, GPIO_MUX_CPU1, 1);
   GPIO_SetupPinOptions(63, GPIO_OUTPUT, GPIO_ASYNC);

   DINT;

   InitPieCtrl();

   IER = 0x0000;
   IFR = 0x0000;

   InitPieVectTable();

   scic_fifo_init();
   scic_echoback_init();

   while (1)
   {
		msg = "abc\0";
		scic_msg(msg);

		msg = "def\0";
		scic_msg(msg);
	}
}

void scic_echoback_init()
{
 	ScicRegs.SCICCR.all =0x0007;

	ScicRegs.SCIHBAUD.all = 0x0002;
        ScicRegs.SCILBAUD.all = 0x008A;

	ScicRegs.SCICTL1.all = 0x0023;
}

// Transmit a character from the SCI
void scic_xmit(int a)
{
    while (!ScicRegs.SCICTL2.bit.TXRDY) {}
    ScicRegs.SCITXBUF.all =a;
}

void scic_msg(char * msg)
{
    int i = 0;
    while(msg[i] != '\0')
    {
        scic_xmit(msg[i]);
        i++;
    }
    scic_xmit('\n');
}

void scic_fifo_init()
{
    ScicRegs.SCIFFTX.all=0xE040;
    ScicRegs.SCIFFRX.all=0x2044;
    ScicRegs.SCIFFCT.all=0x0;
}

Issue is that strings are not transmitted as planned, bellow are images from oscilloscope.

First transmit of abc:

Transmit of def:

Next transmit of abc:

Could someone help me with advice, what did I miss?

Thanks a lot!

Best

Sergii