关于2812的sci测试程序

只看该作者 · 2007-1-2 19:16

我用合众达的SCI测试程序进行SCI 测试时出现一个问题，就是我觉得程序应该是将从上位机发送过去的字符返回来，但我以运行程序，没有从上位机向dsp发送字符就可以从串口调试助手上看到DSP 发送过来一大堆字符。
而且即使我把程序停止掉，甚至dsp断电，上位机还是老是接收到字符。。不知道是什么原因，哪位大哥帮帮忙。。谢谢！！！
代码如下：
#include "DSP28_Device.h"
unsigned int Sci_VarRx[100];
unsigned int i,j;
unsigned int Send_Flag;

void main(void)
{

        /*初始化系统*/
        InitSysCtrl();

        /*关中断*/
        DINT;
        IER = 0x0000;
        IFR = 0x0000;

        /*初始化PIE中断*/
        InitPieCtrl();

        /*初始化PIE中断矢量表*/
        InitPieVectTable();

        /*初始化SCIA寄存器*/
    InitSci();
    for(i = 0; i < 100; i++)
    {
            Sci_VarRx = 0;
    }
    i = 0;
    j = 0;
    Send_Flag = 0;

    #if SCIA_INT
        /*设置中断服务程序入口地址*/
        EALLOW;        // This is needed to write to EALLOW protected registers
        PieVectTable.TXAINT = &SCITXINTA_ISR;
        PieVectTable.RXAINT = &SCIRXINTA_ISR;
        EDIS;   // This is needed to disable write to EALLOW protected registers

        /*开中断*/
        IER |= M_INT9;
        #endif
        EINT;   // Enable Global interrupt INTM
        ERTM;        // Enable Global realtime interrupt DBGM

        for(;
        {
                if((SciaTx_Ready() == 1) && (Send_Flag == 1))
                {
                        SciaRegs.SCITXBUF = Sci_VarRx;
                        Send_Flag = 0;
                        i++;
                        if(i == j)
                        {
                                i = 0;
                                j = 0;
                        }
                }


                #if !SCIA_INT
                if(SciaRx_Ready() == 1)
                {
                        Sci_VarRx[j] = SciaRegs.SCIRXBUF.all;
                        Send_Flag = 1;
                        j++;
                        if(j == 100)
                        {
                                j = 0;
                        }
                }
                #endif
        }

}

//===========================================================================
// No more.
//===========================================================================

void InitSci(void)
{
        // Initialize SCI-A:
        *UART_MODE = 0x44;

        EALLOW;
        GpioMuxRegs.GPFMUX.all = 0x0030;
        EDIS;
        /* loopback   8 bit data */
        SciaRegs.SCICCR.all = 0x07;

        SciaRegs.SCICTL1.all = 0x03;
        SciaRegs.SCICTL2.all = 0x03;

        SciaRegs.SCIHBAUD = 0x00;
        SciaRegs.SCILBAUD = 0xF3;

        SciaRegs.SCICTL1.all = 0x23;

        PieCtrl.PIEIER9.bit.INTx1 = 1;
        PieCtrl.PIEIER9.bit.INTx2 = 1;
        //tbd...


        // Initialize SCI-B:

        //tbd...
}

/********************************************************************************
        name:        int SciaTx_Ready(void)
        input:        none
        output:        i        1:        ready
                        0:        busy
*********************************************************************************/

int SciaTx_Ready(void)
{
        unsigned int i;
        if(SciaRegs.SCICTL2.bit.TXRDY == 1)
        {
                i = 1;
        }
        else
        {
                i = 0;
        }
        return(i);
}

/********************************************************************************
        name:        int SciaRx_Ready(void)
        input:        none
        output:        i        1:        new data
                        0:        none
*********************************************************************************/

int SciaRx_Ready(void)
{
        unsigned int i;
        if(SciaRegs.SCIRXST.bit.RXRDY == 1)
        {
                i = 1;
        }
        else
        {
                i = 0;
        }
        return(i);
}


//===========================================================================
// No more.