lesson6.lst

PIC单片机的AD使用

     1: #include<pic.h>
     2: #define uchar unsigned char
     3: #define uint  unsigned int
     4: __CONFIG(0x3B31);
     5: const uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
     6: const uchar table1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,
     7:                         0x87,0xff,0xef};
     8: void delay(uint x);
     9: void init();
    10: void xianshi(uchar a1,uchar a2,uchar a3,uchar a4);
    11: uint get_tem();
    12: void main()
    13: {
    14:         uint add1;
    15:         uchar a1,a2,a3,a4;
    16:         init();
    17:         while(1)
    18:         {
    19:                 add1=get_tem();
    20:                 a1=add1/1000;
    21:                 a2=add1%1000/100;
    22:                 a3=add1%100/10;
    23:                 a4=add1%10;
    24:                 xianshi(a1,a2,a3,a4);   
    25:         }       
    26: }
    27: void delay(uint x)
    28: {
    29:         uint a,b;
    30:         for(a=x;a>0;a--)
    31:                 for(b=110;b>0;b--);
    32: }
    33: void init()
    34: {
    35:         TRISD=0;
    36:         TRISB=0;
    37:         PORTD=0;
    38:         PORTB=0;
    39:         TRISA=0X01;
    40:         ADCON0=0X41;
    41:         ADCON1=0X8E;
    42:         delay(1);
    43: }
    44: void xianshi(uchar a1,uchar a2,uchar a3,uchar a4)
    45: {
    46:         TRISD=0X7f;     
    47:         PORTB=table1[a1];
    48:         delay(2);
    49:         
    50:         TRISD=0Xbf;
    51:         PORTB=table[a2];
    52:         delay(2);       
    53: 
    54:         TRISD=0Xdf;
    55:         PORTB=table[a3];
    56:         delay(2);       
    57: 
    58:         TRISD=0Xe7;
    59:         PORTB=table[a4];
    60:         delay(2);
    61: }
    62: uint get_tem()
    63: {
    64:         uint advale;
    65:         float add0;
    66:         ADGO=1;
    67:         while(ADGO);
    68:         advale=ADRESH;
    69:         advale=advale<<8|ADRESL;
    70:         add0=(advale/1023.0)*5.0;
    71:         advale=(int)(add0*1000);
    72:         return advale;
    73: }