Slave_LCD.ino

// Code provided by Smoke And Wires
// http://www.smokeandwires.co.nz
// This code has been taken from the Adafruit TFT Library and modified
//  by us for use with our TFT Shields / Modules
// For original code / licensing please refer to
// https://github.com/adafruit/TFTLCD-Library

#include <Adafruit_GFX.h>    // Core graphics library
#include "SWTFT.h" // Hardware-specific library
#include <Ultrasonic.h>
#include <Wire.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

// When using the BREAKOUT BOARD only, use these 8 data lines to the LCD:
// For the Arduino Uno, Duemilanove, Diecimila, etc.:
//   D0 connects to digital pin 8  (Notice these are
//   D1 connects to digital pin 9   NOT in order!)
//   D2 connects to digital pin 2
//   D3 connects to digital pin 3
//   D4 connects to digital pin 4
//   D5 connects to digital pin 5
//   D6 connects to digital pin 6
//   D7 connects to digital pin 7
// For the Arduino Mega, use digital pins 22 through 29
// (on the 2-row header at the end of the board).

// Assign human-readable names to some common 16-bit color values:
#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 pino_trigger 4
#define pino_echo 5
SWTFT tft;
// If using the shield, all control and data lines are fixed, and
// a simpler declaration can optionally be used:
// SWTFT tft;

Ultrasonic ultrasonic(pino_trigger, pino_echo);

float cmMsec, inMsec;
long microsec = ultrasonic.timing();

void setup(void) {
  Serial.begin(9600);
  Serial.println(F("TFT LCD test"));
  Wire.begin(8);
  Wire.onReceive(receiveEvent);


  tft.reset();

  uint16_t identifier = tft.readID();

  
    Serial.print(F("LCD driver chip: "));
    Serial.println(identifier, HEX);
    

  tft.begin(identifier);

  Serial.println(F("Benchmark                Time (microseconds)"));

  Serial.print(F("Screen fill              "));
  Serial.println(testFillScreen());
  delay(500);

  Serial.print(F("Text                     "));
  Serial.println(testText());
  delay(3000);
  Serial.println(F("Done!"));
}

void loop(void) {
    //tft.setRotation(rotation);
    testText();
    delay(2000);
  
}

unsigned long testFillScreen() {
  unsigned long start = micros();
  tft.fillScreen(BLACK);
  tft.fillScreen(RED);
  tft.fillScreen(GREEN);
  tft.fillScreen(BLUE);
  tft.fillScreen(BLACK);
  return micros() - start;
}

unsigned long testText() {
 

  tft.fillScreen(BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  tft.setTextColor(WHITE);  tft.setTextSize(1);
  tft.println("Hello World!");
  tft.setTextColor(YELLOW); tft.setTextSize(2);
  tft.println(1234.56);
  tft.setTextColor(RED);    tft.setTextSize(3);
  tft.println(0xDEADBEEF, HEX);
  tft.println();
  tft.setTextColor(GREEN);
  tft.setTextSize(5);
  tft.println("Distancia");
  tft.setTextSize(2);
  tft.println(cmMsec);
  tft.setTextSize(1);
  return micros() - start;
}
void receiveEvent(int howMany) {
  cmMsec = Wire.read();    // receive byte as an integer
  tft.println(cmMsec);         // print the integer
}

//  return micros() - start;
//}