VC5504 UART

Mushtaq,

I got your rar file. We will switch to email.

Regards.

Steve

Hello,

I am having the same problem with TMS320C5505:

I am observing is that there is no activity on the Tx line even though the code is writing data to the THR register. Also the code monitors bit 6 of the LSR register to ensure that both the Tx FIFO and the Tx shift register are empty. The Tx line remains at 3.3V.

Which is the solution?

CSL_UartSetup mySetup =
{

// Input clock freq in MHz
    100000000,
    // Baud rate
    38400,
    // Word length of 8
    CSL_UART_WORD8,
    // To generate 1 stop bit
    0,
    // Disable the parity
    CSL_UART_DISABLE_PARITY,
    // Enable trigger 14 fifo
    CSL_UART_FIFO_DMA1_DISABLE_TRIG14,
    // Loop Back enable
    CSL_UART_NO_LOOPBACK,
    // No auto flow control
    CSL_UART_NO_AFE ,
    // No RTS
    CSL_UART_NO_RTS ,

};

void Init_Uart(void)
{
    CSL_UartIsrAddr    isrAddr;
    CSL_Status         status;
    Uint32             sysClk;

sysClk = getSysClk();

    mySetup.clkInput = sysClk;

    // Loop counter and error flag
    status = UART_init(&uartObj,CSL_UART_INST_0,UART_INTERRUPT);
    if(CSL_SOK != status)
    {
        printf("UART_init failed error code %d\n",status);
        return;
    }
    else
    {
        printf("UART_init Successful\n");
    }

    // Handle created
    hUart = (CSL_UartHandle)(&uartObj);

    // Configure UART registers using setup structure
    status = UART_setup(hUart,&mySetup);
    if(CSL_SOK != status)
    {
        printf("UART_setup failed error code %d\n",status);
        return;
    }
    else
    {
        printf("UART_setup Successful\n");
    }

    // Configure and Register the UART interrupts
   
    isrAddr.tbeiAddr = uart_txIsr;
   

// Configuring Interrupt
    IRQ_plug (UART_EVENT, &UART_intrDispatch);



    Buff_tx_uart[0] = 'L';
    Buff_tx_uart[1] = 0xAA;


    // Enabling Interrupt
    IRQ_enable(UART_EVENT);


    // Set the UART callback function
     status = UART_setCallback(hUart,&isrAddr);
    if(status != CSL_SOK)
    {
        printf("UART_setCallback Failed\n");
    }

// Enable the UART Events
    status = UART_eventEnable(hUart, CSL_UART_XMITOR_REG_EMPTY_INTERRUPT);
    if(status != CSL_SOK)
    {
        printf("UART_eventEnable Failed\n");
    }

}

void uart_txIsr(void)
{

status1 = UART_write( hUart,Buff_tx_uart,2,0);

status = UART_eventDisable(hUart, CSL_UART_XMITOR_REG_EMPTY_INTERRUPT);

}

interrupt void UART_intrDispatch(void)
{
    Uint16 eventId = 0;

    IRQ_disable(UART_EVENT);

    /* Get the event Id which caused interrupt */
   
   
  eventId = UART_getEventId(hUart);


    return;
}

void main()

{

       status = UART_eventEnable(hUart, CSL_UART_XMITOR_REG_EMPTY_INTERRUPT);

        UART_write( hUart,Buff_tx_uart,2,0);

}

Hello,

I have the same problem which is described above. My UART module isn't working even using the CSL demo code which is shown below.

#include <stdio.h>

#include <csl.h>

#include <csl_uart.h>

//---------Global constants---------

/* String length to be received and transmitted */

#define STR_LEN        80

//---------Global data definition---------

/* Buffer to be copied to clip board and sent to UART 

   using terminal emulator program 

*/

char clipboardBuf[] = {

" <BEGIN>The quick brown fox jumped over lazy dog. This is simple UART test<END>"

};

/* User buffer that receives data */

char myBuf[STR_LEN];

/* UART setup structure */

UART_Setup mySetup = {

   75,  /* input clock freq */

   UART_BAUD_4800, /* baud rate */

   UART_WORD8, /* word length */

   UART_STOP1, /* stop bits */

   UART_DISABLE_PARITY, /* parity */

   UART_FIFO_DISABLE, /*DISABLE */

   UART_NO_LOOPBACK,   /* Loop Back enable */

};

//---------main routine---------

void main()

{

    /* Loop counter and error flag */

    Int16 i, error = 0;

    /* Initialize CSL library */

    CSL_init();

    /* Configure UART registers using setup structure */

    UART_setup(&mySetup);

    /* UART receiver reads data from PC COM port */

    if (UART_read(myBuf, STR_LEN, 0) == FALSE) {

       error = 1;

    }

    else {

       /* UART transmitter write data to PC COM port */

       if ((UART_write(myBuf, STR_LEN, 0)) == FALSE)

           error = 1;

    }

    /* Verify the recevied data for correctness */

    for (i = 0; i < STR_LEN-1; i++) {

       if (myBuf[i] != clipboardBuf[i]) {

           error = 1;

           break;

       }

    }

    /* Display PASS/FAIL status based on error flag */

    if (error)

       printf("\nTEST FAILED\n");

    else

       printf("\nTEST PASSED\n");

}

Hi Fredico,

Try tu put 

75000000,  /* input clock freq */

rather than

75,  /* input clock freq */

Nicolas

Hello Idoia,

I happen to have the same problem as described by you.There is no activity on the Tx line even though the code is writing data to the THR register.

It's been long since you posted this.I would be glad to know if you have come across any solution for this.

Thanks in advance