#include<avr/io.h>
#include<util/delay.h>
#include<stdio.h>
#include<stdlib.h>
#include<inttypes.h>
#include "ili9341.h"
#include "ili9341gfx.h"
#include "ads1115.h"



#define Fan 3
#define supply_volt 5.03
#define ACS712_out (supply_volt/2)
#define ref_volt 4.096
#define R1 18
#define R2 2
#define div_coeff ((R1+R2)/R2)



extern volatile uint16_t backup_x,backup_y;

uint16_t Voutx,Vouty,Ix,Iy,Tempx,Tempy;

void load_screen1(void)
{
ili9341_setcursor(0,0);
ili9341_settextsize(3);
ili9341_settextcolour(WHITE,BLACK);
ili9341_printstring("VOLT - ");//voltage measurements

ili9341_settextsize(5);
ili9341_settextcolour(GREEN,BLACK);
ili9341_backupcursor();
Voutx=backup_x;
Vouty=backup_y;//coordinates to update voltage
ili9341_printstring("00.00V\n\n");

ili9341_settextsize(3);
ili9341_settextcolour(WHITE,BLACK);
ili9341_printstring("AMP -  ");

ili9341_settextsize(5);
ili9341_settextcolour(GREEN,BLACK);
ili9341_backupcursor();
Ix=backup_x;
Iy=backup_y;//coordinates to update ampere
ili9341_printstring("00.00A\n\n");


ili9341_settextsize(3);
ili9341_settextcolour(WHITE,BLACK);
ili9341_printstring("TEMP - ");
ili9341_settextsize(5);
ili9341_settextcolour(GREEN,BLACK);
ili9341_backupcursor();
Tempx=backup_x;
Tempy=backup_y;//coordinates to update voltage
ili9341_printstring("00");
ili9341_write(0xF7);//degree sign
ili9341_write(' ');

ili9341_settextsize(3);
ili9341_settextcolour(WHITE,BLACK);
ili9341_printstring("FAN");
ili9341_setcursor(245,190);
ili9341_printstring("OFF");
}


void display1(uint16_t x1,uint16_t y1,uint8_t size,uint16_t colour,uint16_t displaydata)
{
ili9341_setcursor(x1,y1);
_delay_ms(1);
ili9341_settextsize(size);
_delay_ms(1);
ili9341_settextcolour(colour,BLACK);
_delay_ms(1);
ili9341_write((displaydata/1000)+48);
displaydata%=1000;
ili9341_write((displaydata/100)+48);
displaydata%=100;
ili9341_write('.');
_delay_ms(1);
ili9341_write((displaydata/10)+48);
displaydata%=10;
ili9341_write(displaydata+48);
}


void display_temp(uint8_t x1,uint8_t y1,uint8_t size,uint16_t colour,uint8_t temp)
{
ili9341_setcursor(x1,y1);
_delay_ms(1);
ili9341_settextsize(size);
_delay_ms(1);
ili9341_settextcolour(colour,BLACK);
_delay_ms(1);
ili9341_write((temp/10)+48);
_delay_ms(1);
ili9341_write((temp%10)+48);
_delay_ms(1);
}


uint16_t measure_volt(void)
{
uint16_t result,volt;
double temp_val;
result=read_ads1115_single_ended(0);
temp_val=(result * ref_volt * div_coeff)/32768;
volt=(uint16_t)(temp_val * 100);
return volt;
}



uint16_t measure_amp(void)
{
double temp_val;
uint16_t result,amp=0;
result=read_ads1115_single_ended(1);
temp_val=(result * ref_volt)/32768;
if(temp_val>ACS712_out)
{
temp_val=(temp_val-ACS712_out)/0.185;
amp=(uint16_t)(temp_val * 100);
}
return amp;
}



uint16_t measure_temp(void)
{
double temp_val;
uint16_t result,temp;
result=read_ads1115_single_ended(2);
temp_val=(result * ref_volt)/32768;
temp=(uint16_t)(temp_val * 100);
return temp;
}



int main(void)
{
uint16_t Volt_main,Amp_main,Temp_main;
uint8_t Fan_stat=0;

ili9341_init();//initial driver setup to drive ili9341

PORTD &=~(1<<Fan);//initially fan is off

ili9341_clear(BLACK);//fill screen with black colour
_delay_ms(1000);
ili9341_setRotation(3);//rotate screen
_delay_ms(2);

load_screen1();

_delay_ms(500);

while(1)
{

Volt_main=measure_volt();

_delay_ms(1);

display1(Voutx,Vouty,5,GREEN,Volt_main);

_delay_ms(10);

Amp_main=measure_amp();

_delay_ms(1);

display1(Ix,Iy,5,GREEN,Amp_main);

_delay_ms(10);

Temp_main=measure_temp();

_delay_ms(1);

display_temp(Tempx,Tempy,5,GREEN,Temp_main);

_delay_ms(10);

//Smart fan control is getting into action below

if(Temp_main>50)
{
if(Fan_stat==0)//If the fan was previously off 
{
PORTD|=(1<<Fan);//If temparature of LM350 crosses 50 degree,Turn fan on
Fan_stat=1;//keep the fan on status

ili9341_settextsize(3);
ili9341_settextcolour(RED,BLACK);
ili9341_setcursor(245,190);
ili9341_printstring("ON ");//Display the fan on status
}
}


else if(Temp_main<40)
{
if(Fan_stat==1)//If the fan was previously on
{
PORTD &=~(1<<Fan);//If temparature is less than 40,then the fan is off
Fan_stat=0;//clear fan on status

ili9341_settextsize(3);
ili9341_settextcolour(WHITE,BLACK);
ili9341_setcursor(245,190);
ili9341_printstring("OFF");//Display the fan on status
}
}
_delay_ms(10);

}

}