28027SCI发送和接收数据例程分享

只看该作者 · 2014-2-28 20:47

#include "DSP28x_Project.h"
extern void MemCopy(Uint16 *SourceAddr, Uint16* SourceEndAddr, Uint16* DestAddr);
extern Uint16 RamfuncsLoadStart;
extern Uint16 RamfuncsLoadEnd;
extern Uint16 RamfuncsRunStart;
void Scia_xmit(int a);
void Uart_sendstring(char * ch);
void Scia_receive(void);
int Conversion(int number, int system, char output[]);
int Sci_Receivedata;
char str[3];
void main(void) {
      char ch;
      InitSysCtrl();
      InitGpio();
      InitSpiaGpio();
      InitSciaGpio();
      DINT;
      InitPieCtrl();

      IER = 0x0000;
      IFR = 0x0000;

      InitPieVectTable();
      MemCopy(&RamfuncsLoadStart, &RamfuncsLoadEnd, &RamfuncsRunStart);
      InitFlash();
      EALLOW;
      PieVectTable.SCIRXINTA=&SCITXINTA_ISR;
      EDIS;
      PieCtrlRegs.PIEIER9.bit.INTx2=1;
      EINT;
      ERTM;
      InitSci();
      InitSpi();
      Sci_Receivedata=0x00;
      while(1)
      {
            Sci_Receivedata=0x00;
            Scia_receive();
            if(Sci_Receivedata!=0x00)
            {
                     ch=(char)Sci_Receivedata;
                     if(ch=='1')
                     {
                              GpioDataRegs.GPACLEAR.bit.GPIO0=1;
                     }
                     else
                     {
                              GpioDataRegs.GPASET.bit.GPIO0=1;
                     }
                     Scia_xmit(Sci_Receivedata);
            }
            /*(void)Conversion(Sci_Receivedata,10,str);
            Uart_sendstring(str);
            Uart_sendstring("\t");*/

      }
}
void Scia_receive(void)
{
      while(SciaRegs.SCIFFRX.bit.RXFFST!=0)
      {
            Sci_Receivedata=SciaRegs.SCIRXBUF.all;
      }
}
void Scia_xmit(int a)
{
while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}
SciaRegs.SCITXBUF=a;
}
void Uart_sendstring(char * ch)
{
      Uint16 i = 0;

while(ch != '\0')
{
      Scia_xmit(ch);
      i++;
}
}
int Conversion(int number,       /*in  要转换的数据*/
            int system,       /*in  进制*/
            char output[]) /*out 输出数据*/
{
// 商,余数和标记
int Quotient, Balance, i = 0;
int j,k;
Quotient = number;

do
{
      Balance = Quotient % system;
      output[i++] = Balance;
} while (Quotient /= system);

// 转换为char型
for(j = 0; j < i; j++)
      if(output[j] > 9)
         output[j] = output[j] + 55;
      else output[j] += 48;

// 字符串取反
for(k = 0; k < i / 2; k++)
{
      char tmp;
      tmp = output[k];
      output[k] = output[i - k - 1];
      output[i - k - 1] = tmp;
}
output='\0';
return i;
}

void InitSci(void)
{
      SciaRegs.SCICCR.all=0x0007;//1个结束位，无校验位，发送8个数据位
      SciaRegs.SCICTL2.bit.TXINTENA=1;//发送中断使能
      SciaRegs.SCICTL2.bit.RXBKINTENA=1;//接受中断使能
      SciaRegs.SCIHBAUD=0x0000;
      SciaRegs.SCILBAUD=BRR9600;//波特率设置为9600
      SciaRegs.SCIFFTX.all=0xC021;//使能复位发送FIFO
      SciaRegs.SCIFFRX.all=0xC021;//使能复位接受FIFO
      SciaRegs.SCIFFCT.all=0x00;//FIFO控制寄存器延时时间位0
      SciaRegs.SCICTL1.all=0x0023;//发送/接受中断使能位
      //SciaRegs.SCIFFRX.bit.RXFFIL=7;
      SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;//重新使能发送FIFO的操作
      SciaRegs.SCIFFRX.bit.RXFIFORESET=1;//重新使能接受ＦＩＦＯ的操作
}