adc_volt0-5.lst

adc volt meter pic micro

     1: #include<pic.h>
     2: 
     3: #include<math.h> 
     4: unsigned char A,B,a,z,i,data,l,m;
     5: unsigned int I,j,k;
     6: void main()
     7: {
     8:                 #define ADCOSC          0b01000000              // ADC convertion clock fosc/8
     9:                 #define CHANNEL0      0b00000000                // ADC channel 0 (RA0/AN0)
    10:                 #define ADCON           0b00000101              // ADC power on
    11:                 ADRESH=0x00;
    12:                 ADRESL=0x00;
    13:                 TRISA=0b11111111;
    14:                 TRISC=0x00;
    15:                 TRISD=0x00;
    16:                         
    17:                 ADCON1=0b10000000;                                      //right justified 
    18: 
    19:                 ADCON0= ADCOSC | CHANNEL0 | ADCON;
    20:                 ADCON0= ADCON0 | 0b00000100;            //start conversion
    21:         
    22:                 while(1)
    23:                 {
    24:                 z=0b00010000;
    25:                 while(ADGO)
    26:                         { }
    27:                         A=ADRESH & 0b00000010;
    28:                         B=ADRESH & 0b00000001;
    29:          
    30:                 if(A==2)
    31:                 {j=512;}
    32:                 else
    33:                 {j=0;}
    34:                 if(B==1)
    35:                 {k=256;}
    36:                 else
    37:                 {k=0;}
    38:                 I=j+k+ADRESL;                                   //512+256+255=1023
    39:                 else if(I>=0 && I<=204)
    40:                 {
    41:                 PORTC=0x01;                     //data
    42:                 PORTD=0x01;                     //power
    43:                 }
    44:                 else if(I>=205 && I<=409)
    45:                 {
    46:                 PORTC=0x02;
    47:                 PORTD=0x01;
    48:                 }
    49:                 else if(I>=410 && I<=613)
    50:                 {
    51:                 PORTC=0x03;
    52:                 PORTD=0x01;
    53:                 }
    54:                 else if(I>=614 && I<=818)
    55:                 {
    56:                 PORTC=0x04;
    57:                 PORTD=0x01;
    58:                 }
    59:                 else if(I>=819 && I<=1023)
    60:                 {
    61:                 PORTC=0x05; 
    62:                 PORTD=0x01;
    63:                 }
    64: }               
    65: }