DSP28335的485如何发送地址？

为你分心 · 发表于 2015-7-15 11:55:27

void scib_fifo_init()
{
   ScibRegs.SCICCR.all =0x000F;    // 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.bit.TXINTENA =1;
   ScibRegs.SCICTL2.bit.RXBKINTENA =1;
   ScibRegs.SCIHBAUD    =0x0000;
   ScibRegs.SCILBAUD    =0x006c;     //28.8Kbps
   ScibRegs.SCICCR.bit.LOOPBKENA =0; // Enable loop back
   ScibRegs.SCIFFTX.all=0xC021;
   ScibRegs.SCIFFRX.all=0x4021;
   ScibRegs.SCIFFCT.all=0x00;
   ScibRegs.SCICTL1.all =0x0023;     // Relinquish SCI from Reset
   ScibRegs.SCIFFTX.bit.TXFIFOXRESET=1;
   ScibRegs.SCIFFRX.bit.RXFIFORESET=1;

}

interrupt void scibTxFifoIsr(void)
{
ScibRegs.SCIFFTX.bit.TXFFINTCLR=1; // Clear Interrupt flag
ieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK
}
//======================================
//RS485发送函数
//======================================

void scib_xmit(int TargetAddr,int DataNum,int *TransData)
{

Uint16 i;
    TX_EN;
    for (i=0;i<30;i++)
       {
        ;
       }
    ScibRegs.SCICTL1.bit.TXWAKE=1;   //发送模式唤醒
    ScibRegs.SCITXBUF=TargetAddr;   //发送地址
while (ScibRegs.SCICTL2.bit.TXEMPTY!=1); //等待发送完毕，清除发送中断标志
    ScibRegs.SCICTL1.bit.TXWAKE=0;    //关闭唤醒
   ScibRegs.SCICCR.bit.ADDRIDLE_MODE =0;    // 空闲地址为协议
    for (i=0;i<DataNum;i++)
    {
        ScibRegs.SCITXBUF=*TransData;   //发送数据
    while (ScibRegs.SCICTL2.bit.TXEMPTY!=1); //等待发送完毕，清除发送中断标志
        TransData++;
    }
    TX_EN;   // Load output latch
   ScibRegs.SCICCR.bit.ADDRIDLE_MODE =1;    // 选择地址为协议
    for (i=0;i<30;i++)
       {
        ;
       }