dg128sci.c

飞思卡尔单片机MC9SDG128串口程序

/*-------------------------------------------------------
    SCI Module
    Donald
    Apr 17, 2007
-------------------------------------------------------*/
#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */
#include "DG128SCI.h"

#include "MotorD.h"

void SciInit(void){
  SCI0BDH = 0;        // bus clock = 8M, SCI baud rate is 9600
  SCI0BDL = 0x34;     // SCI baud rate = SCI module clock / (16 * BR)
  SCI0CR1_PE = 0;     // Parity disabled
  SCI0CR2_TE = 1;     // Transmitter enabled
  SCI0CR2_RE = 1;     // Receiver enabled
  SCI0CR2_RIE = 1;    // Receive Interrupt enabled
}

void SciTx(unsigned char cTx){
  unsigned char tmp;
  tmp=SCI0SR1;                  // clear flag
  while (!(SCI0SR1&0x80));      // wait for output buffer empty
  SCI0DRH=0;
  SCI0DRL=cTx;
}

char SciRx(void){
  char result,tmp;
  tmp=SCI0SR1;                  // clear flag
  while(!(SCI0SR1&0x20));
  result=SCI0DRL;
  return result;
}

void PutStr(char* str){
  char* pTmp;
  pTmp = str;
  while(*pTmp++ != '\0'){
    SciTx(*pTmp);
  }
}

interrupt void SciSrv(void){
  unsigned char cDat;
  DisableInterrupts;
  cDat = SciRx();
/*  // show what input
  if (cDat == '\r'){
    SciTx('\r');
    SciTx('\n');
  }else
    SciTx(cDat);
*/

  // Menu Function
  SciTx(cDat);
  SciTx('\r');
  SciTx('\n');

  switch (cDat){
    case '1':
      PORTB = 0x01 ^ 0xff;
      
      break;
    case '2':
      PORTB = 0x02 ^ 0xff;
      
      break;
    case '3':
      PORTB = 0x04 ^ 0xff;
      
      break;
    case '4':
      PORTB = 0x08 ^ 0xff;
      
      break;
    case '5':
      PORTB = 0x10 ^ 0xff;
      
      break;
    case '6':
      PORTB = 0x20 ^ 0xff;
      break;
    case '7':
      PORTB = 0x40 ^ 0xff;
      break;
    case '8':
      PORTB = 0x80 ^ 0xff;
      break;
    case '+':
      
      PORTB = PORTB ^ 0XFF;
      break;
    case '-':
      
      PORTB = PORTB ^ 0XFF;
      break;
    default:
      //PORTB = PORTB ^ 0XFF;
      ;
  }
  EnableInterrupts;
}

void Delay(void){
  word i, j;
  for (i = 0; i < 6; i++)
    for(j = 0; j < 3000; j++);
}

void BinToHex(unsigned char cBin, char* cHexH, char* cHexL){
  if((cBin & 0x0F) > 9){
    *cHexL = (cBin & 0x0F) - 0x0a + 'A';
  } else{
    *cHexL = (cBin & 0x0F) + '0';
  }
  cBin >>= 4;
  if ((cBin & 0x0F) > 9){
    *cHexH = (cBin & 0x0F) - 0x0a + 'A';
  } else{
    *cHexH = (cBin & 0x0F) + '0';
  }
}