read_adc.lst

read adc pic16fxx using c

     1: #include        <pic.h> 
     2: 
     3:         
     4: void main()
     5:                 {
     6:                 unsigned int I,j,k,L,i,msg;
     7:                 unsigned char A,B,z;    
     8:                 #define ADCOSC          0b10000000              
     9:                 #define CHANNEL0        0b00000000              // ADC channel 0 (RA0/AN0)
    10:                 #define ADCON           0b00000101              // ADC power on
    11:                 ADRESL=0x00;
    12:                 ADRESH=0x00;
    13:                 TRISB=0x00;
    14:                 PORTB=0x00;
    15:                 TRISD=0x00;
    16:                 PORTD=0x00;
    17:                 TRISC=0x00;
    18:                 PORTC=0x00;
    19:                 ADCON0 = ADCOSC | CHANNEL0 | ADCON;
    20:                 ADCON1=0b10000000;
    21:                 ADCON0= ADCON0 | 0b00000100;    //start conversion
    22:                 while(1)
    23:                 {
    24:                 PORTD=ADRESH & 0b00000010;
    25:                 PORTB=ADRESL & 0b11111111;
    26:                 z=0b00010000;
    27:                 PORTC=z;
    28:                 while(ADGO);
    29:                 {
    30:                 A=ADRESH & 0x02;        //0b00000010
    31:                 B=ADRESH & 0x01;        //0b00000001
    32:                 L       =        ADRESL;                                                                        
    33:                 L       += (ADRESH << 8);
    34:                 
    35:                 if(A==2)
    36:                 {j=512;}
    37:                 else
    38:                 {j=0;}
    39:                 if(B==0)
    40:                 {k=256;}
    41:                 else
    42:                 {k=0;}
    43:                 I=j+k+L;
    44:                 for(i=0;i<=3;i++)                       
    45:                 {
    46:                 msg=I%10;
    47:                 msg=msg | 0b10000000;   //DATA TO PORTD & DOT
    48:                 PORTD=msg;
    49:                 z=z>>1;
    50:                 PORTC=z;                //LED ON COMMAND PORT
    51:                 PORTC=z;
    52:                 PORTC=z;
    53:                 I=I/10;
    54:                 PORTC=0;
    55:                 }
    56:                 }
    57:                 }}              
    58: 
    59:                 
    60:         
    61: 
    62: