CCS C ADC

main.c

#include <main.h>
#use rs232(UART1,baud=9600,parity=N,stream=UART,errors)

INT16 value, value2;

float vol;
void test(){
float a=5;
float b=1024;
float v=(float)a/b;
float ff1;
int8 open=60;
//ff1=(float)5/1024;
fprintf (UART, "Gia tri V= %2.7grn", 0.00048);
}
void tinh_Vol(INT16 adc_doc_duoc)
{
   //5V ung voi 1024 muc(ADC)
   //1ADC=5/1024=
   FLOAT one_adc=0.00244;//=5/1024;
   vol=adc_doc_duoc*one_adc;
   fprintf (UART, "Gia tri VOL = %2.2grn", vol);
}

void main()
{
   setup_adc (ADC_CLOCK_INTERNAL);
  // setup_adc_ports(AN0, VSS_VDD);
   setup_adc_ports(AN0, VREF_VREF);
  

   WHILE (TRUE)
   {
      set_adc_channel (0);
      delay_us (10);
      value = read_adc ();
     
      fprintf (UART, "Gia tri ADC = %lurn", value);
     
      delay_ms (1000);
     tinh_Vol (value) ;
   // test();
     
      //TODO: User Code
   }
}

main.h

#include <18F4520.h>
#device *=16
#device adc=10//Khai bao su dung ADC 10 bit

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES WDT128                   //Watch Dog Timer uses 1:128 Postscale
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOXINST                  //Extended set extension and Indexed Addressing mode disabled (Legacy mode)

#use delay(clock=20000000)