giovedì 25 agosto 2016

Interface Arduino UNO clone with a 2.4 TFT touchscreen - 2nd version

On July I've tested a first version of 2.4" TFT touchscreen shield for Arduino.
Now, I've tested a second version, but it was different ( probably use a different display driver) and need an update on firmware source.



video


I've tested this library, ( thanks to the author Joao ) :

https://github.com/JoaoLopesF/SPFD5408

but I made some adjustment in order to function correctly with this TFT display.

Without this amendment, the issues were :
- Colour's difference
- Wrong  "x" and "y" axis  on the touch

Colour's difference : 

To adjust the colour issue , I've added just one line/command on "SPFD5408_Adafruit_TFTLCD" library.

On the "Adafruit_TFTLCD::begin" procedure , I 've added :

writeRegister8(ILI9341_INVERTON, 0);//

Below , the complete function with the correction higlighted in red  :

void Adafruit_TFTLCD::begin(uint16_t id) {
  uint8_t i = 0;

  reset();
  delay(200);
  if((id == 0x9325) || (id == 0x9328)) {
    uint16_t a, d;
    driver = ID_932X;
    CS_ACTIVE;
    while(i < sizeof(ILI932x_regValues) / sizeof(uint16_t)) {
      a = pgm_read_word(&ILI932x_regValues[i++]);
      d = pgm_read_word(&ILI932x_regValues[i++]);
      if(a == TFTLCD_DELAY) delay(d);
      else                  writeRegister16(a, d);
    }
    setRotation(rotation);
    setAddrWindow(0, 0, TFTWIDTH-1, TFTHEIGHT-1);

  } else if (id == 0x9341) {

    uint16_t a, d;
    driver = ID_9341;
    CS_ACTIVE;
    writeRegister8(ILI9341_SOFTRESET, 0);
    delay(50);
    writeRegister8(ILI9341_DISPLAYOFF, 0);
    writeRegister8(ILI9341_POWERCONTROL1, 0x23);
    writeRegister8(ILI9341_POWERCONTROL2, 0x10);
    writeRegister16(ILI9341_VCOMCONTROL1, 0x2B2B);
    writeRegister8(ILI9341_VCOMCONTROL2, 0xC0);
    writeRegister8(ILI9341_MEMCONTROL, ILI9341_MADCTL_MY | ILI9341_MADCTL_BGR);
    writeRegister8(ILI9341_PIXELFORMAT, 0x55);
    writeRegister16(ILI9341_FRAMECONTROL, 0x001B);
    writeRegister8(ILI9341_ENTRYMODE, 0x07);
    /* writeRegister32(ILI9341_DISPLAYFUNC, 0x0A822700);*/
    writeRegister8(ILI9341_SLEEPOUT, 0);
    delay(150);
    writeRegister8(ILI9341_DISPLAYON, 0);
    delay(500);
// *** SPFD5408 change -- Begin
// Not tested yet
writeRegister8(ILI9341_INVERTON, 0);//included by paco
delay(500);//included by paco - could be removed ?
    // *** SPFD5408 change -- End
    setAddrWindow(0, 0, TFTWIDTH-1, TFTHEIGHT-1);
    return;

  } else if (id == 0x8357) {
    // HX8357D
    driver = ID_HX8357D;
    CS_ACTIVE;
     while(i < sizeof(HX8357D_regValues)) {
      uint8_t r = pgm_read_byte(&HX8357D_regValues[i++]);
      uint8_t len = pgm_read_byte(&HX8357D_regValues[i++]);
      if(r == TFTLCD_DELAY) {
delay(len);
      } else {
//Serial.print("Register $"); Serial.print(r, HEX);
//Serial.print(" datalen "); Serial.println(len);

CS_ACTIVE;
CD_COMMAND;
write8(r);
CD_DATA;
for (uint8_t d=0; d<len; d++) {
 uint8_t x = pgm_read_byte(&HX8357D_regValues[i++]);
 write8(x);
}
CS_IDLE;

      }
    }

Touch has a wrong  "x" and "y" axis 


Below, you can find the example source file "spfd5408_tftpaint" by Jao Lopes, contained in the library.
I function perfectly, just the touch had a wrong "X" & "Y"  axis value.
I made a few adjustment to fix it . See below higlighted in red.

// Paint example specifically for the TFTLCD breakout board.
// If using the Arduino shield, use the tftpaint_shield.pde sketch instead!
// DOES NOT CURRENTLY WORK ON ARDUINO LEONARDO

// Modified for SPFD5408 Library by Joao Lopes
// Version 0.9.2 - Rotation for Mega

// *** SPFD5408 change -- Begin
#include <SPFD5408_Adafruit_GFX.h>    // Core graphics library
#include <SPFD5408_Adafruit_TFTLCD.h> // Hardware-specific library
#include <SPFD5408_TouchScreen.h>


// *** SPFD5408 change -- End

#if defined(__SAM3X8E__)
    #undef __FlashStringHelper::F(string_literal)
    #define F(string_literal) string_literal
#endif

// 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).
//   D0 connects to digital pin 22
//   D1 connects to digital pin 23
//   D2 connects to digital pin 24
//   D3 connects to digital pin 25
//   D4 connects to digital pin 26
//   D5 connects to digital pin 27
//   D6 connects to digital pin 28
//   D7 connects to digital pin 29

// For the Arduino Due, use digital pins 33 through 40
// (on the 2-row header at the end of the board).
//   D0 connects to digital pin 33
//   D1 connects to digital pin 34
//   D2 connects to digital pin 35
//   D3 connects to digital pin 36
//   D4 connects to digital pin 37
//   D5 connects to digital pin 38
//   D6 connects to digital pin 39
//   D7 connects to digital pin 40

#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

// Original values
//#define TS_MINX 150
//#define TS_MINY 120
//#define TS_MAXX 920
//#define TS_MAXY 940

// Calibrate values
#define TS_MINX 100
#define TS_MINY 100
#define TS_MAXX 965
#define TS_MAXY 905

// 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);

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

// 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


Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

#define BOXSIZE 40
#define PENRADIUS 3
int oldcolor, currentcolor;

void setup(void) {
  Serial.begin(9600);
  Serial.println(F("Paint!"));
  
  tft.reset();

  // *** SPFD5408 change -- Begin
  uint16_t identifier = tft.readID();
Serial.print(F("ID : "));
Serial.println(identifier,HEX);// add by rob
//  if(identifier == 0x9325) {
//    Serial.println(F("Found ILI9325 LCD driver"));
//  } else if(identifier == 0x9328) {
//    Serial.println(F("Found ILI9328 LCD driver"));
//  } else if(identifier == 0x7575) {
//    Serial.println(F("Found HX8347G LCD driver"));
//  } else if(identifier == 0x9341) {
//    Serial.println(F("Found ILI9341 LCD driver"));
//  } else if(identifier == 0x8357) {
//    Serial.println(F("Found HX8357D LCD driver"));
//  } else {
//    Serial.print(F("Unknown LCD driver chip: "));
//    Serial.println(identifier, HEX);
//    Serial.println(F("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
//    Serial.println(F("  #define USE_ADAFRUIT_SHIELD_PINOUT"));
//    Serial.println(F("should appear in the library header (Adafruit_TFT.h)."));
//    Serial.println(F("If using the breakout board, it should NOT be #defined!"));
//    Serial.println(F("Also if using the breakout, double-check that all wiring"));
//    Serial.println(F("matches the tutorial."));
//    return;
//  }
//
//  tft.begin(identifier);

  tft.begin(0x9341); // SDFP5408
  
  tft.setRotation(0); // Need for the Mega, please changed for your choice or rotation initial

  // Border

  drawBorder();
  
  // Initial screen
  
  tft.setCursor (55, 50);
  tft.setTextSize (3);
  tft.setTextColor(RED);
  tft.println("SPFD5408");
  tft.setCursor (65, 85);
  tft.println("Library");
  tft.setCursor (55, 150);
  tft.setTextSize (2);
  tft.setTextColor(BLACK);
  tft.println("TFT Paint");

  tft.setCursor (80, 250);
  tft.setTextSize (1);
  tft.setTextColor(BLACK);
  tft.println("Touch to proceed");
  // Wait touch

  waitOneTouch();

// *** SPFD5408 change -- End

  // -- End

  // Paint
  
  tft.fillScreen(BLACK);

  tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
  tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, YELLOW);
  tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, GREEN);
  tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, CYAN);
  tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, BLUE);
  tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, MAGENTA);
 // tft.fillRect(BOXSIZE*6, 0, BOXSIZE, BOXSIZE, WHITE);
  tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
  currentcolor = RED;
  pinMode(13, OUTPUT);
}

#define MINPRESSURE 10
#define MAXPRESSURE 1000

void loop()
{
  digitalWrite(13, HIGH);
  TSPoint p = ts.getPoint();
  digitalWrite(13, LOW);

  // if sharing pins, you'll need to fix the directions of the touchscreen pins
  //pinMode(XP, OUTPUT);
  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) {
    /*
    Serial.print("X = "); Serial.print(p.x
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);
    */
    
    if (p.y < (TS_MINY-5)) {
      Serial.println("erase");
      // press the bottom of the screen to erase 
      tft.fillRect(0, BOXSIZE, tft.width(), tft.height()-BOXSIZE, BLACK);
    }
    // scale from 0->1023 to tft.width

    // *** SPFD5408 change -- Begin
    // Bug in in original code
//    p.x = map(p.y, TS_MINY, TS_MAXY, 0, tft.height
  
     p.y=1023-p.y;        //added by Paco
     int terri=p.x;         //added by Paco
     p.x=p.y;                //added by Paco
     p.y=terri;             //added by Paco
  
  p.x = map(p.x, TS_MINX, TS_MAXX, 0, tft.width());
    // *** SPFD5408 change -- End
   p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());


    /*
    Serial.print("("); Serial.print(p.x);
    Serial.print(", "); Serial.print(p.y);
    Serial.println(")");
    */
    if (p.y < BOXSIZE) {
       oldcolor = currentcolor;

       if (p.x < BOXSIZE) { 
         currentcolor = RED; 
         tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*2) {
         currentcolor = YELLOW;
         tft.drawRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*3) {
         currentcolor = GREEN;
         tft.drawRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*4) {
         currentcolor = CYAN;
         tft.drawRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*5) {
         currentcolor = BLUE;
         tft.drawRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, WHITE);
       } else if (p.x < BOXSIZE*6) {
         currentcolor = MAGENTA;
         tft.drawRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, WHITE);
       }

       if (oldcolor != currentcolor) {
          if (oldcolor == RED) tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
          if (oldcolor == YELLOW) tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, YELLOW);
          if (oldcolor == GREEN) tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, GREEN);
          if (oldcolor == CYAN) tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, CYAN);
          if (oldcolor == BLUE) tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, BLUE);
          if (oldcolor == MAGENTA) tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, MAGENTA);
       }
    }
    if (((p.y-PENRADIUS) > BOXSIZE) && ((p.y+PENRADIUS) < tft.height())) {
      tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
    }
  }
}

// Wait one touch

TSPoint waitOneTouch() {

  // wait 1 touch to exit function
  
  TSPoint p;
  
  do {
    p= ts.getPoint(); 
  
    pinMode(XM, OUTPUT); //Pins configures again for TFT control
    pinMode(YP, OUTPUT);
  
  } while((p.z < MINPRESSURE )|| (p.z > MAXPRESSURE));
  
  return p;
}


void drawBorder () {

  // Draw a border

  uint16_t width = tft.width() - 1;
  uint16_t height = tft.height() - 1;
  uint8_t border = 10;

  tft.fillScreen(RED);
  tft.fillRect(border, border, (width - border * 2), (height - border * 2), WHITE);
  
}

You can see the result here :

video




lunedì 22 agosto 2016

4 Channel Relay Shield Arduino compatible


I've used this relay shield for a personal project, the quality of the boards was pretty fine but there was no documentation supplied except for an image or two on the original web site.

Module features are :
  1. Standard for Arduino Shield interfaces and shape.
  2. Can continue to stack other for Arduino expansion board (relays use Digital output Pins 7,6,5 and 4). Also the SPI connector is stackable
  3. 3x M3 screw positioning holes for easy installation.
  4. High Drive (5V or 3.3V) normally open contact closure.
  5. 4 red led Onboard relay indicator
Special Note: If mounting on an Arduino Uno, take care about the pins of the green terminal blocks do not interfere with the USB interface (which is higher than normal).



Relay Shield Interface:
  • Relay: sky- 5V DC relay , model HJR-4102-L-5V, 
  • Power Interface : 5V DC power interface
  • Indicator: four leds are red when the relay is driven high , the corresponding indicator will light up .
  • Relay Terminals: Terminal high-power , high-current high voltage can be connected to the device - 3A 125VAC - 3A 24VDC
Here a simple example's sketch:

void setup () 
  { 
    pinMode (4, OUTPUT); 
    digitalWrite (4, LOW );
    pinMode (5, OUTPUT); 
    digitalWrite (5, LOW );
    pinMode (6, OUTPUT); 
    digitalWrite (6, LOW );
    pinMode (7, OUTPUT); 
    digitalWrite (7, LOW );
    pinMode (13, OUTPUT); 
    delay (5000);
 }

void loop () 
    
    digitalWrite (4, HIGH );
    digitalWrite (5, HIGH );
    digitalWrite (6, HIGH );
    digitalWrite (7, HIGH );
    digitalWrite (13, HIGH );
    delay (1000);
    digitalWrite (4, LOW );
    digitalWrite (5, LOW );
    digitalWrite (6, LOW );
    digitalWrite (7, LOW );
    digitalWrite (13, LOW );
    delay (1000);
    
}