TERMÔMETRO COM PIC 16F877A

(Componente NTSA0WB203)

Código feito em CCS C Compiler

//PÁGINA 136

#include <16F877A.h>

#device adc = 10

#fuses XT, NOWDT

#use delay (clock = 4MHz)

#include <math.h>

#include <lcd.c>

float tv, tr, temp, y;

int16 value;

void main(){

   lcd_init();   

   setup_port_a(ALL_ANALOG);

   setup_adc(ADC_CLOCK_INTERNAL);

   set_adc_channel(0);

   delay_ms(10);

   

   while(true){

      value = read_adc();

      tv = 5.0 * value / 1024.0;

      tr = tv * 10000.0 / (5.0 - tv);

      y = log(tr / 20000.0);

      y = (1.0 / 298.15) + (y * (1.0 / 4050.0));

      temp = 1.0 / y;

      temp = temp - 273.15;

      

      printf(lcd_putc, "\f\nT = %04.2fC",temp);

      delay_ms(1000);

   }

}