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TFT_GRAPH/TFT_GRAPH.ino

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+//***THIS IS THE NEW VERSION THAT WORKS WITH THE NEW LIBRARIES!!!***
+// TFTLCD.h and TouchScreen.h are from adafruit.com where you can also purchase a really nice 2.8" TFT with touchscreen :)
+// 2012 Jeremy Saglimbeni - thecustomgeek.com
+#include <Adafruit_GFX_AS.h>    // Core graphics library
+#include <Adafruit_ILI9341_8bit_AS.h>// Hardware-specific library
+#include <TouchScreen.h>
+//#include <EEPROM.h>
+
+
+
+// The control pins for the LCD can be assigned to any digital or
+// analog pins...but we'll use the analog pins as this allows us to
+// double up the pins with the touch screen (see the tft paint example).
+#define LCD_CS A3 // Chip Select goes to Analog 3
+#define LCD_CD A2 // Command/Data goes to Analog 2
+#define LCD_WR A1 // LCD Write goes to Analog 1
+#define LCD_RD A0 // LCD Read goes to Analog 0
+
+#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin
+
+
+
+#define TS_MINX 150
+#define TS_MINY 120
+#define TS_MAXX 920
+#define TS_MAXY 940
+
+
+// These are the pins for the shield!
+#define YP A1  // must be an analog pin, use "An" notation!
+#define XM A2  // must be an analog pin, use "An" notation!
+#define YM 7   // can be a digital pin
+#define XP 6   // can be a digital pin
+
+// For better pressure precision, we need to know the resistance
+// between X+ and X- Use any multimeter to read it
+// For the one we're using, its 300 ohms across the X plate
+TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
+
+
+// Color definitions - in 5:6:5
+#define	BLACK           0x0000
+#define	BLUE            0x001F
+#define	RED             0xF800
+#define	GREEN           0x07E0
+#define CYAN            0x07FF
+#define MAGENTA         0xF81F
+#define YELLOW          0xFFE0 
+#define WHITE           0xFFFF
+#define TEST            0x1BF5
+
+
+
+Adafruit_ILI9341_8bit_AS tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
+
+
+float values[320];
+
+long readVcc() {
+  long result;
+  // Read 1.1V reference against AVcc
+  ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
+  delay(2); // Wait for Vref to settle
+  ADCSRA |= _BV(ADSC); // Convert
+  while (bit_is_set(ADCSRA,ADSC));
+  result = ADCL;
+  result |= ADCH<<8;
+  result = 1126400L / result; // Back-calculate AVcc in mV
+  return result;
+}
+void setup(void) {
+  
+  Serial.begin(9600);
+ 
+  tft.reset();
+  delay(10);
+  tft.begin(0x9341);
+  uint16_t identifier = tft.readID(); 
+  
+  tft.fillScreen(BLACK);
+  tft.setRotation(1);
+  
+  drawAxes();
+
+  for (int i = 0; i < 300;i+=2) {
+    values[i] = random(230);
+  }
+  
+  for (int i = 0; i < 300;i+=2) {
+    drawBar(i, values[i]);
+  }
+  
+}
+
+void loop() {
+  
+  digitalWrite(13, HIGH);
+  
+  TSPoint p = ts.getPoint();
+  
+  digitalWrite(13, LOW);
+  // if you're sharing pins, you'll need to fix the directions of the touchscreen pins!
+  //pinMode(XP, OUTPUT);
+  pinMode(XM, OUTPUT);
+  pinMode(YP, OUTPUT);
+
+  // we have some minimum pressure we consider 'valid'
+  // pressure of 0 means no pressing!
+  if (p.z > 10 ) {
+         Serial.print("X = "); 
+     Serial.print(p.x);
+     Serial.print("\tY = "); 
+     Serial.print(p.y);
+     Serial.print("\tPressure = "); 
+     Serial.println(p.z);
+     
+    // turn from 0->1023 to tft.width
+    p.x = map(p.x, TS_MINX, TS_MAXX, 240, 0);
+    p.y = map(p.y, TS_MINY, TS_MAXY, 320, 0);
+    
+    Serial.print("p.y:"); // this code will help you get the y and x numbers for the touchscreen
+    Serial.print(p.y);
+    Serial.print("   p.x:");
+    Serial.println(p.x);
+    
+    
+      tft.drawPixel(p.x, p.y, WHITE);
+    
+  }
+}
+  #define posx 10
+  #define posy 10
+  #define lenx 240
+  #define leny 320
+void drawAxes(){
+
+  
+   tft.drawLine(posx, posy, posx, 240 - posy , BLUE); 
+   tft.drawLine(posx, 240 - posy, leny, 240 - posy, RED);
+   for (int x = posx; x < lenx;x+=25) {
+     tft.drawLine(0, 240 - x, posx, 240 - x, WHITE);
+     // Serial.println(x);
+   }
+   for (int y = posy; y < leny; y+=25) {
+    tft.drawLine(y, 240 - posy, y, 240, RED);
+   }   
+   
+   tft.setCursor(20, 10);
+   tft.print("Y");
+   tft.setCursor(leny - 20, lenx - 25);
+   tft.print("X");
+}
+
+void drawBar(int pos, float value) {
+  
+  
+  tft.drawLine(pos + posx + 1, 229, pos + posx + 1, 240 - (int) value, GREEN);
+}
+
+