main.c

MSP430+IR+LCD显示读出的键值

#include  <MSP430X14X.h>

typedef unsigned char uchar;
typedef unsigned int  uint;

#define t_3ms5  2300
#define t_1ms   666
uchar get_code[4] = {0};
uchar dat_code=0;
uint  timer;

#include "msp430.c"
#include "12864.c"
#include "cry12864.h"
void delay(uint time)    //10ms--10000
{
 while(time--);
}

void dat_high()
{P1DIR |= BIT5;
 P1OUT |= BIT5;
}
void dat_low()
{P1DIR |= BIT5;
 P1OUT &= ~BIT5;
}
uchar rd_dat()
{ uchar stat;
  P1DIR |= BIT5;
  P1OUT |= BIT5;
  P1DIR &= ~BIT5;
  stat = P1IN;
  return (stat);
}

uchar get_num()
{ uchar i,j,rd,dat=0;
  _DINT();             //关闭中断
  for(j=0;j<4;j++)
  { for(i=8;i>0;i--)
     {dat>>=1; 
      do
       rd=rd_dat();
      while(!(rd & BIT5));	//	wait high
      set_timer_b0();		   //检测高电平时间
      do
      rd=rd_dat();
      while(rd & BIT5);	//	wait low
      timer=TBR;
      stop_timer_b0();
	  if(timer>t_1ms)dat=dat|0x80;
      else dat=dat&0x7f;  	  
      }
   get_code[j]=dat;
   }
 _EINT(); 
return(get_code[2]);    //只显示键码部分
 
}

void main( void )
{ uchar rd;
  WDTCTL = WDTPW + WDTHOLD; 
  Ini_Lcd();
  dat_high();
  set_timer_a0();
judge: 
  do	  
  rd=rd_dat();
  while(rd & BIT5); 	//wait low
  delay(100); 
  rd=rd_dat();
  if(rd & BIT5)goto judge; //xiao dou 
  do
  rd=rd_dat();
  while(!(rd & BIT5));	 //wait high
  set_timer_b0();
  do
   rd=rd_dat();
  while(rd & BIT5);	 //wait low
  timer=TBR;
  stop_timer_b0(); 
  if(timer<t_3ms5){delay(1000);goto judge;}//连续按下，重复标志
  dat_code=get_num();
  goto judge; 
}


// CCRO 捕获比较中断处理
 #pragma vector=TIMERA0_VECTOR
 __interrupt void Timer_A0 (void)
{ 
   uchar dat_code1,dat_code2;
   CCR0  = 1500;          //重新载入CCR0捕获/比较数据寄存器数据
   dat_code1=dat_code & 0x0F;     //取键码的低四位
   dat_code2=dat_code >> 4;       //右移4次，高四位变为低四位

   if(dat_code1>9)
    { dat_code1=dat_code1+0x37;}
   else
	  dat_code1=dat_code1+0x30;

   if(dat_code2>9)
    { dat_code2=dat_code2+0x37;}
   else
	  dat_code2=dat_code2+0x30;

     Write_Cmd(0x80);            
     Write_Data(dat_code2);        //第一位数显示             
     Write_Data(dat_code1);        //第二位数显示
   
    }