#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC PB7
#define TFT_CS PB6
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

int flow=20;
int press=100;
int valve=100;
int counter=0;
byte on = 0;
byte gpm =  0;

void setup() {
  pinMode(A0, INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3, INPUT_PULLUP);
  tft.begin();
  tft.setTextColor(ILI9341_CYAN);
  tft.setTextSize(2);
  tft.setCursor(0, 30);
  tft.print(" Flow    : ");
  int temp = flow * 26;
  tft.print(temp/100);
  tft.print(".");
  tft.print(temp/10);
  tft.print(temp%10);
  //tft.print(flow*26);
  tft.println(" GPM");
  tft.println();
  tft.setTextColor(ILI9341_GREEN);
  tft.setCursor(0, 60);
  tft.print(" Pressure: ");
  tft.print(press);
  tft.println(" psi");
  tft.println();
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(0, 90);
  tft.print(" Valve   : ");
  tft.print(valve);
  tft.println(" %");  
  tft.fillCircle(120, 200, 40, ILI9341_WHITE);
  tft.fillCircle(120, 200, 35, ILI9341_RED);
  tft.setCursor(105, 195);
  tft.setTextColor(ILI9341_BLACK);
  tft.print("OFF");
}

void loop() {
  delay(1);
  counter++;
  if (counter==1000){
    tft.setTextColor(ILI9341_GREEN,ILI9341_BLACK);
    tft.setCursor(132, 60);
    press = analogRead(PA4);
    //press = map(press,0,4095,0,3300);
    //press = map(press,580,2900,0,100);
    //tft.print(press*145/100);
    tft.print(press);
    counter=0;
  }
  if ((digitalRead(A0)==0) && (on==0)){
    tft.fillCircle(120, 200, 35, ILI9341_GREEN);
    tft.setCursor(110, 195);
    tft.setTextColor(ILI9341_BLACK);
    tft.print("ON");
    on=1;
    while (digitalRead(A0)==0) delay(10);
  } 
  else if ((digitalRead(A0)==0) && (on==1)){
    tft.fillCircle(120, 200, 35, ILI9341_RED);
    tft.setCursor(105, 195);
    tft.setTextColor(ILI9341_BLACK);
    tft.print("OFF");
    on=0;
    while (digitalRead(A0)==0) delay(10);
  }
  if (digitalRead(A1)==0){
    tft.setTextColor(ILI9341_WHITE,ILI9341_BLACK);  
    tft.setCursor(132, 90);
    if (valve>0) valve -= 10; 
    tft.print(valve);
    tft.print(" % ");
    while (digitalRead(A1)==0) delay(10);
  } 
  if (digitalRead(A2)==0){
    tft.setTextColor(ILI9341_WHITE,ILI9341_BLACK);
    tft.setCursor(132, 90);
    if (valve<90) valve += 10;
    tft.print(valve);
    tft.print(" % ");
    while (digitalRead(A2)==0) delay(10);
  }
  if ((digitalRead(A3)==0) && (gpm==0)){
    tft.setTextColor(ILI9341_CYAN,ILI9341_BLACK);
    tft.setCursor(180, 30);
    tft.print("GPM");
    gpm=1;
    while (digitalRead(A0)==0) delay(10);
  } 
  else if ((digitalRead(A3)==0) && (gpm==1)){
    tft.setTextColor(ILI9341_CYAN,ILI9341_BLACK);
    tft.setCursor(180, 30);
    tft.print("LPM");
    gpm=0;
    while (digitalRead(A0)==0) delay(10);
  }
}