/* 
PIC16F877A baic program EX1 
*/ 
#include <16F877a.h> 
#device adc=10    // Set ADC resolution to 10B it
#use delay(clock=4000000)
#include <lcd.c>

Void main()
{
   int16 x;
   float y;
/* ADC Initialization */
   setup_adc(ADC_CLOCK_INTERNAL); // initialize ADC with a sampling rate of Crystal/4 MHz
   setup_adc_ports(RA0_ANALOG);   // set PIN_A0 as analog input channel
   set_adc_channel(0);            // point ADC to channel 0 for ADC reading
   delay_ms(1);                   // ADC module is slow, needs some time to adjust.
   
   /* Peripherals Configurations */ 
   lcd_init();                   // Turn LCD ON, along with other initialization commands
   delay_ms(100);
   
      
   while(true)
{
   x = read_adc(); // x from 0 to 1023 
   y = 5.0 * x / 1024.0; // y from 0v to 5v
   printf(lcd_putc, "\fADC = %4Ld", x);//format % : 4 digits , long integer
   
   printf(lcd_putc, "\nVoltage = %01.2fv",y);//format % : 2digits.2digit float
   delay_ms(500);
   }
}

/* 
PIC16F877A and LM35 Based Temperature Monitor 

*/ 

#include <16F877A.h> 
#device adc=10    // Set ADC resolution to 10Bit
#use delay(clock=4000000) 
#include "lcd.c" 

#define  LOAD  PIN_B7 
#define  THRES 30.0     // load switching threshold in Celsius

int16 digital_reading;  // ADC resolution is 10Bit, an 8Bit integer is not enough to hold the reading
float temp; 

void main() 
{ 
   /* 1- ADC Initialization */ 
   setup_adc(ADC_CLOCK_INTERNAL); // initialize ADC with a sampling rate of Crystal/4 MHz
   setup_adc_ports(RA0_ANALOG);   // set PIN_A0 as analog input channel
   set_adc_channel(0);            // point ADC to channel 0 for ADC reading
   delay_ms(1);                   // ADC module is slow, needs some time to adjust. 
    
   /* 2- Peripherals Configurations */ 
   lcd_init();                   // Turn LCD ON, along with other initialization commands
   
   output_low(LOAD);             // the load is initially OFF
   lcd_gotoxy(1,1);              // point LCD cursor to col1 row1
   lcd_putc("Temperature is:");  // print on LCD 
    
   while(TRUE) // infinite loop 
   { 
      digital_reading = read_adc();    // capture current temperature reading
      delay_us(100);                   // 0.1ms delay for ADC stabilization
      
      temp = digital_reading * 0.4883; // convert reading to Celsius
      
      lcd_gotoxy(1,2);                 // point LCD cursor to col1 row2
      printf(lcd_putc,"%2.1f C",temp); // print value on LCD,format % : 2digits.1digit   
       
      if(temp>=THRES)   output_high(LOAD);   // Control Load 
      else  output_low(LOAD); 
       
      delay_ms(1000);   // 1 second delay between readings
   } 
}

#include <16F877A.h>
#use delay(clock=20000000)
#include<lcd.c>

void main(){
int count;
//set_tris_b(0x01); /* Set I/O pins of Port B */
lcd_init();

/* Set up 8-bit RTCC */
setup_timer_0(RTCC_EXT_L_TO_H|RTCC_DIV_1);
set_timer0(0); /* TMR0 = 0 */

   while(TRUE)
   {
      count = get_timer0(); /* Read counter0 */
      printf(lcd_putc ,"\fCounter0 = %u",count); /* ... send it out! */
      delay_ms(200);           /* Wait 200 ms to debounce */