touchscreeen for garden controller

screen.ino

//tft macros

#define LCD_CS A3    
#define LCD_CD A2    
#define LCD_WR A1   
#define LCD_RD A0    
#define LCD_RESET A4

//touchscreen macros

#define YP A3
#define XM A2
#define YM 9   
#define XP 8   

#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940

#define MINPRESSURE 10
#define MAXPRESSURE 1000

// color macro
#define	BLACK           0x0000
#define	BLUE            0x001F
#define	RED             0xF800
#define	GREEN           0x07E0
#define CYAN            0x07FF
#define MAGENTA         0xF81F
#define YELLOW          0xFFE0 
#define WHITE           0xFFFF

#include "TFTLCD.h"
#include "TouchScreen.h"
//lcd setup according to macro
TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
// 300 Ohm resistance on x ground
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);

String in_str = ""; //for one character at a time input stream
boolean nl_flg = false; //flag for line complete
int a_line;  // line numbers for displaying text in menu
boolean submenu = false; //toggle menu state from main


void setup(void) {
  Serial.begin(9600);
  
  in_str.reserve(512); // malloc up some memory
  Serial.println("welcome to grobot");  
  tft.reset();
  tft.initDisplay();
  tft.setRotation(3);
  delay(50);
  tft.fillScreen(BLACK);
  delay(50);

}

void loop(void) {
  //set up the screen
    main_menu();
    
}


void fmt_txt(uint16_t color, uint8_t x, uint8_t y, uint8_t font_size) {
  //format the text
  tft.setTextColor(color);
  tft.setTextSize(font_size);
  tft.setCursor(x, y);

}
void output_data(uint8_t line){
  //tft.fillScreen(BLACK);
  int tmp, inc;
  tmp = 60;
  inc = 18;
  for (int i=0; i<=line; i++){
      tmp += inc;
  }
  // print the line onto a black background
  tft.drawRect(0, tmp, tft.width(), inc, YELLOW);
  tft.fillRect(0, tmp, tft.width()-1, inc-1, BLACK);

  
  fmt_txt(MAGENTA, 0, tmp, 2);
  tft.println(in_str);
  
}
void main_menu(){//header

 fmt_txt(GREEN, 5, 10, 3);
 tft.println("grobot controller");
 tft.print("--------------------");
  //navigation bar
 fmt_txt(CYAN, 0, 50, 1);
 tft.println(" _____________________________________________________");
 tft.println("| humidity | pressure | temp | water temp | luminance |"); 
 tft.println("|__________|__________|______|____________|___________|");
 menu_input();
  
    if (nl_flg) {
    Serial.println(in_str);
    output_data(a_line);
    // clear the string:
    in_str = "";
    nl_flg = false;
    a_line ++;
    if (a_line > 8){a_line = 0;}
    
  }

}


void serialEvent() {
  while (Serial.available()) {
    char in_char = (char)Serial.read();
    in_str += in_char;
    if (in_char == '\n') {
      nl_flg = true;
    }
  }
}

void menu_input(){
  digitalWrite(13, HIGH);
  Point p = ts.getPoint();
  digitalWrite(13, LOW);


  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);

  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
        p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(), 0);
        p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);
        
        Serial.print(p.x);
        Serial.print("  ");
        Serial.println(p.y);
       // navbar buttons
       if(p.x < 50){
         //top of the screen
         //rotation causes x-y swap
         if(p.y <= 40){nav_bar(4);}
         else if(p.y > 40 && p.y <= 90){nav_bar(3);}
         else if(p.y > 90 && p.y <= 140){nav_bar(2);}
         else if(p.y > 140 && p.y <= 200){nav_bar(1);}
         else if(p.y > 200 && p.y <= 260){nav_bar(0);} 
       }
  }
}

void nav_bar(uint8_t button){
    switch(button){
      case 0:
          Serial.println("Humidity Menu");
          in_str = "";
          nl_flg = true;         
          break;
       case 1:
          Serial.println("Pressure Menu");
          in_str = "";
          nl_flg = true;         
          break;
       case 2:
          Serial.println("Temperature Menu");
          in_str = "";
          nl_flg = true;          
          break;
       case 3:
          Serial.println("Water Temperature Menu");
          in_str = "";
          nl_flg = true;
          break;  
       case 4:
          Serial.println("Luminance Menu");
          in_str = "";
          nl_flg = true;
          fill_rects(YELLOW, MAGENTA);
          break;
          
             
    } 
}


void fill_rects(uint16_t color1, uint16_t color2) {
  for (uint16_t x=tft.width()-1; x > 6; x-=6) {
   tft.fillRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color1);
   tft.drawRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color2);
  }
  tft.fillScreen(BLACK);
  a_line =0;
}