DSP 28335 SCI输出延迟一个值？

939561900

DSP 28335 SCI输出延迟一个值？ [复制链接]

DSP 28335 SCI输出延迟一个值，新人求助，望大神们指点一二！




#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File



// Prototype statements for functions found within this file.

void scib_echoback_init(void);

void scib_fifo_init(void);

void scib_xmit(Uint16 a);

void scib_msg(char *msg);



// Global counts used in this example

Uint16 LoopCount;

Uint16 ErrorCount;



void main(void)

{



    Uint16 ReceivedChar;

        Uint16 i;

    char *msg;

   InitSysCtrl();



   InitScibGpio();



   DINT;



   InitPieCtrl();



// Disable CPU interrupts and clear all CPU interrupt flags:

   IER = 0x0000;

   IFR = 0x0000;



   InitPieVectTable();



    LoopCount = 0;

    ErrorCount = 0;



    scib_fifo_init();           // Initialize the SCI FIFO

    scib_echoback_init();  // Initalize SCI for echoback



    ScibRegs.SCIFFRX.bit.RXFFOVRCLR=1;

        for(;;)

    {



//      while(ScibRegs.SCIFFRX.bit.RXFFST !=1) { } // wait for XRDY =1 for empty state



//      ReceivedChar = ScibRegs.SCIRXBUF.all;



       // Echo character back



           for(i=1;i<255;i++)

           {

               scib_xmit(i);

                DELAY_US(1);

           }

       LoopCount++;

    }



}





// Test 1,SCIA  DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity

void scib_echoback_init()

{

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

    // in the InitSysCtrl() function



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

                                   // No parity,8 char bits,

                                   // async mode, idle-line protocol

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

                                   // Disable RX ERR, SLEEP, TXWAKE

        ScibRegs.SCICTL2.all =0x0003;

        ScibRegs.SCICTL2.bit.TXINTENA =1;

        ScibRegs.SCICTL2.bit.RXBKINTENA =1;

        #if (CPU_FRQ_150MHZ)

              ScibRegs.SCIHBAUD    =0x0001;  // 9600 baud @LSPCLK = 37.5MHz.

              ScibRegs.SCILBAUD    =0x00E7;

        #endif

        #if (CPU_FRQ_100MHZ)

      ScibRegs.SCIHBAUD    =0x0001;  // 9600 baud @LSPCLK = 20MHz.

      ScibRegs.SCILBAUD    =0x0044;

        #endif

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

}



// Transmit a character from the SCI

void scib_xmit(Uint16 a)

{



//    ScibRegs.SCITXBUF=a;

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

    ScibRegs.SCITXBUF=a;



}



void scib_msg(char * msg)

{

    int i;

    i = 0;

    while(msg[i] != '\0')

    {

        scib_xmit(msg[i]);

        i++;

    }

}



// Initalize the SCI FIFO

void scib_fifo_init()

{

//    ScibRegs.SCIFFTX.all=0xE040;

        ScibRegs.SCIFFTX.all=0xE04f;

    ScibRegs.SCIFFRX.all=0x204f;

    ScibRegs.SCIFFCT.all=0x0;



}

nemo1991

什么意思？

939561900

nemo1991 发表于 2015-8-7 20:28
什么意思？

感谢你得回答！就是发送延迟输出一个单元，问题已经解决了

nemo1991

939561900 发表于 2015-8-11 20:39
感谢你得回答！就是发送延迟输出一个单元，问题已经解决了

最好和大家分享一下。

COOOL

求楼主分享下解决方法，遇到同样问题