CCS/TMS320F28027F: Echoback example in control Suite

Hi Indrajit,

You can use the same code, instead of transmitting what you receive from hyperterminal (as in case of echoback example) -> you should store the value from the external uart device and process it as per your requirement.

Regards,
Gautam

thanks for quick reply . but when i run code I send some command to external device and that IC replies back that i have seen on CRO but I am not getting any signal from RX pin because it stops @ while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { } line .

I hope you've connected RX-> TX and TX-> RX and Common the Ground between them. Also, what is this external device you mention?

Yes I have checked Tx-Rx pins are correctly . I am using bq76pl455A-Q1 Ic for passive cell balancing .

This is register configuration

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 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++;
}
}

Indrajit, try by enabling RX interrupt. Refer "scia_loopback_interrupts" example by disabling the loopback feature.

Sir actually I have added SciaRegs.SCICTL2.bit.RXBKINTENA=1; this line in above code which enable Rx interrupt