lesson6.lst

CCP实现周期测量PIC单片机

     1: #include<pic.h>
     2: #define uchar unsigned char
     3: #define uint unsigned int
     4: __CONFIG(0x3B31);
     5: uint CCPDE;
     6: const uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
     7: void delay(uint x)
     8: {
     9:         uint j,i;
    10:         for(i=x;i>0;i--)
    11:         for(j=110;j>0;j--);
    12: }
    13: uchar temp;
    14: void init();
    15: void display();
    16: void xianshi(uchar num1,uchar num2,uchar num3,uchar num4);
    17: void main()
    18: {
    19:         uchar a1=0,a2=0,a3=0,a4=0;
    20:         init();
    21:         while(1)
    22:         {
    23:                 a1=CCPDE/1000;
    24:                 a2=CCPDE%1000/100;
    25:                 a3=CCPDE%100/10;
    26:                 a4=CCPDE%10;
    27:                 xianshi(a4,a3,a2,a1);
    28:         }               
    29: }
    30: void init()
    31: {
    32:         TRISB=0X00;
    33:         PORTB=0x06;
    34:         TRISC=0x0f;
    35:         CCP1IE=1;       
    36:         T1CON=0X01;
    37:         CCP1CON=0X05;
    38:         GIE=1;
    39:         PEIE=1;
    40: }
    41: void xianshi(uchar num1,uchar num2,uchar num3,uchar num4)
    42: {
    43:         PORTB=table[num1];
    44:         PORTC=0x7f;
    45:         delay(45);
    46: 
    47:         PORTB=table[num2];
    48:         PORTC=0xbf;
    49:         delay(45);
    50: 
    51:         PORTB=table[num3];
    52:         PORTC=0xdf;
    53:         delay(45);
    54: 
    55:         PORTB=table[num4];
    56:         PORTC=0xef;
    57:         delay(45);
    58: }
    59: void interrupt CCP1e()
    60: {       
    61:         uint temp;
    62:         static uint pv;
    63:         if(CCP1IF)
    64:         {
    65:                 CCP1IF=0;
    66:                 temp=CCPR1H;
    67:                 temp*=256;
    68:                 temp+=CCPR1L;
    69:                 CCPDE=temp-pv;
    70:                 pv=temp;
    71:         }
    72: }