CI - LabS10

#include <xc.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "GLCD.h"
#define _XTAL_FREQ 8000000

volatile unsigned int state_changed = 0, select = 1;

void configAD()
{
   TRISA = 0xFF;
   TRISB = 0x00;
   TRISD = 0x00;

   ADCON0 = 0x01; // Selects Channel AN0
   ADCON1 = 0x0D; // RA0 and RA1 set as analog
   ADCON2 = 0x24; // Left justified, TAD = 8, FOSC/4
}

void config_interrupts()
{
   INTCONbits.GIE = 1; // Enable global interrupts
   INTCONbits.PEIE = 1; // Enable peripheral interrupts
   INTCON = 0b10100111;
   RCONbits.IPEN = 1;
}

void config_timer0()
{
   T0CONbits.TMR0ON = 1; //Enable TMR0
   T0CONbits.T08BIT = 0; //16-bit
   T0CONbits.T0SE = 0;   //On rising edge
   T0CONbits.PSA = 0;    //We choose prescale value
   T0CON &= 0b111;
}

void interrupt change_AD(void)
{
   if (INTCONbits.TMR0IE == 1 && INTCONbits.TMR0IF == 1) {
      ADCON0bits.GO = 1;
      while (GO == 1);
      if (select == 1) {
     select = 2;
     state_changed = 1;
     ADCON0 = 0x05;
      }
      else if (select == 2) {
     select = 1;
     state_changed = 2;
     ADCON0 = 0x01;
      }
   }
   INTCONbits.TMR0IF = 0;
   return;
}

void write_base_text()
{
   clearGLCD(0, 7, 0, 127);
   writeTxt(0, 0, "RA0 = ");
   writeTxt(2, 0, "RA1 = ");
   putch(0, 42, '.');
   putch(0, 60, 'V');
   putch(2, 42, '.');
   putch(2, 60, 'V');
   writeTxt(4, 0, "Angle = ");
   writeTxt(6, 0, "Distance = ");
}

void main(void)
{
   configAD();
   GLCDinit();
   config_interrupts();
   config_timer0();
   setStartLine(0);
   write_base_text();
   while (1) {
      if (state_changed == 1) {
     float aux = (ADRESL >> 6) + (ADRESH << 2);
     aux = (aux*5)/1023;
     int integer_part = aux;
     int decimal_part = (aux * 100);
     decimal_part = decimal_part%100;
     clearGLCD(0, 0, 36, 41);
     clearGLCD(0, 0, 48, 59);
     writeNum(0, 36, integer_part);
     writeNum(0, 48, decimal_part);
     //Angle converter **********//
     if (aux < 0.66 || aux > 4.34) writeTxt(4, 48, "Out of range!");
     else {
        float angle = ((aux - 0.66)*180)/3.67;
        integer_part = angle;
        clearGLCD(4, 4, 48, 127);
        writeNum(4, 48, integer_part);
        //Draw your own º symbol instead of 127
        if (integer_part < 10) putch(4, 54, 127);
        else if (integer_part < 100) putch(4, 60, 127);
        else putch(4, 66, 127);
     }
     //**************************//
     state_changed = 0;
     INTCON = 0b10100111;
      }
      else if (state_changed == 2) {
     float aux = (ADRESL >> 6) + (ADRESH << 2);
     aux = (aux*5)/1023;
     int integer_part = aux;
     int decimal_part = aux * 100;
     decimal_part = decimal_part%100;
     clearGLCD(2, 2, 36, 41);
     clearGLCD(2, 2, 48, 59);
     writeNum(2, 36, integer_part);
     writeNum(2, 48, decimal_part);
     // Distance converter ******//
     float distance = 4.114619826424367*(aux*aux) - 20.619066532589823*aux + 30.114823444820473;
     integer_part = distance;
     decimal_part = distance * 100;
     decimal_part = decimal_part%100;
     if (integer_part < 10) {
        clearGLCD(6, 6, 66, 127);
        writeNum(6, 66, integer_part);
        putch(6, 72, '.');
        writeNum(6, 78, decimal_part);
        writeTxt(6, 84, "cm");
     }
     else {
        clearGLCD(6, 6, 66, 127);
        writeNum(6, 66, integer_part);
        putch(6, 78, '.');
        writeNum(6, 84, decimal_part);
        writeTxt(6, 90, "cm");
     }
     //**************************//
     state_changed = 0;
     INTCON = 0b10100111;
      }
   }
}

//JosepRivaille