TFT display based on ILI9486 +UNO+ Adafruit library,can't showing response .

kolhapurkar · July 16, 2018, 5:22am

I interfaced Ardunio uno with TFT display ILI9486 using shield to show text on it.and i uploded the program for sample ,but it showing white screen after uplode program.is there any issue with driver of ILI9486 OR any kind.....

my sample program is like these.

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library


#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  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);


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

#ifdef USE_ADAFRUIT_SHIELD_PINOUT
  Serial.println(F("Using Adafruit 2.4\" TFT Arduino Shield Pinout"));
#else
  Serial.println(F("Using Adafruit 2.4\" TFT Breakout Board Pinout"));
#endif

  Serial.print("TFT size is "); Serial.print(tft.width()); Serial.print("x"); Serial.println(tft.height());

  tft.reset();

  uint16_t identifier = tft.readID();
  if(identifier==0x0101)
      identifier=0x9341;
  
   if(identifier == 0x9325) {
    Serial.println(F("Found ILI9325 LCD driver"));
  } else if(identifier == 0x4535) {
    Serial.println(F("Found LGDP4535 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 if(identifier == 0x9481) {
   Serial.println(F("Found ILI9481 LCD driver"));
  } 
  else {
    Serial.print(F("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    Serial.println(F("If using the Adafruit 2.4\" 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);
  
 
}

void loop(void) {
   tft.fillScreen(BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  
  tft.setTextColor(RED);  tft.setTextSize(1);
  tft.println("Hello World!");
  tft.println(01234.56789);
  tft.println(0xDEADBEEF, HEX);
  tft.println();
  tft.println();

  tft.setTextColor(GREEN); 
  tft.setTextSize(2);
  tft.println("Hello World!");
  tft.println(01234.56789);
  tft.println(0xDEADBEEF, HEX);
  tft.println();
  tft.println();
  
  tft.setTextColor(BLUE);    tft.setTextSize(3);
  tft.println("si vaahaka");
  tft.println(01234.56789);
  tft.println(0xDEADBEEF, HEX);
  
  tft.setTextColor(WHITE);    tft.setTextSize(4);
  tft.println("Hello!");
  tft.setTextColor(YELLOW);    tft.setTextSize(5);
  tft.println("Hello!");
  tft.setTextColor(RED);    tft.setTextSize(6);
  tft.println("Hello!");
  tft.println();
  tft.println();

  delay(1000);delay(1000);delay(1000);delay(1000);delay(1000);
}

david_prentice · July 16, 2018, 5:59am

Install MCUFRIEND_kbv library and Adafruit_GFX libraries via the Library Manager.

Always look on the Serial Terminal. Most examples will report some information.
You can copy-paste from the Terminal to your Forum message.

David.

kolhapurkar · July 16, 2018, 11:19am

Thanks david bro, for suggestion...

But it have not still worked.
I installed the libray of MCUFRIEND_kbv library and Adafruit_GFX via the Library Manager,but the problem remains same ,even it is compile and uplode very well but still screen display the White screen.....

#include <MCUFRIEND_kbv.h>
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library

#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 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);

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

#ifdef USE_ADAFRUIT_SHIELD_PINOUT
Serial.println(F("Using Adafruit 2.4" TFT Arduino Shield Pinout"));
#else
Serial.println(F("Using Adafruit 2.4" TFT Breakout Board Pinout"));
#endif

Serial.print("TFT size is "); Serial.print(tft.width()); Serial.print("x"); Serial.println(tft.height());

tft.reset();

uint16_t identifier = tft.readID();
if(identifier==0x0101)
identifier=0x9341;

if(identifier == 0x9325) {
Serial.println(F("Found ILI9325 LCD driver"));
} else if(identifier == 0x4535) {
Serial.println(F("Found LGDP4535 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 if(identifier == 0x9481) {
Serial.println(F("Found ILI9481 LCD driver"));
}
else {
Serial.print(F("Unknown LCD driver chip: "));
Serial.println(identifier, HEX);
Serial.println(F("If using the Adafruit 2.4" 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);

}

void loop(void) {
tft.fillScreen(BLACK);
unsigned long start = micros();
tft.setCursor(0, 0);

tft.setTextColor(RED); tft.setTextSize(1);
tft.println("Hello World!");
tft.println(01234.56789);
tft.println(0xDEADBEEF, HEX);
tft.println();
tft.println();

tft.setTextColor(GREEN);
tft.setTextSize(2);
tft.println("Hello World!");
tft.println(01234.56789);
tft.println(0xDEADBEEF, HEX);
tft.println();
tft.println();

tft.setTextColor(BLUE); tft.setTextSize(3);
tft.println("si vaahaka");
tft.println(01234.56789);
tft.println(0xDEADBEEF, HEX);

tft.setTextColor(WHITE); tft.setTextSize(4);
tft.println("Hello!");
tft.setTextColor(YELLOW); tft.setTextSize(5);
tft.println("Hello!");
tft.setTextColor(RED); tft.setTextSize(6);
tft.println("Hello!");
tft.println();
tft.println();

delay(1000);delay(1000);delay(1000);delay(1000);delay(1000);
}

david_prentice · July 16, 2018, 12:38pm

Install the library. Run the examples that come with the MCUFRIEND_kbv library.

Of course your program will not work. You are using a constructor from the Adafruit_TFTLCD library.
The Adafruit_TFTLCD library does not even support ILI9486. And it would have told you on the Serial Terminal.

David.

kolhapurkar · July 17, 2018, 4:37am

Thanks david bro..
I installed the mcufriend_kbv library from arduino library manager and I got few examples related to library.and finally it works .....

thanks one more time

now I can use the mcufriend library with TFT display

but i have one querry about the program that

is it possible to make every program compatible with different standard libray and will the library support ?

david_prentice · July 17, 2018, 6:29am

Most TFT libraries use the Adafruit_GFX methods. So you can adapt many programs by just changing the constructor and include.

All Adafruit_TFTLCD examples should work with MCUFRIEND_kbv
Your problem is that Adafruit_TFTLCD has never supported ILI9486

Even programs written for ST7735 or SPI interface ILI9341 need little attention e.g. slight differences for init/begin and for pushColor/pushColors

UTFT programs have VERY different graphics methods. The UTFTGLUE class can help with legacy UTFT but I would always use GFX methods in a new project.

David.

lilabner045 · August 5, 2020, 2:43am

I got one of these boards too, a 3-1/2" TFT LCD on a shield. Advertising that came with it, said it would fit an Arduino DUE. That's a 3.3V-only, ARM processor.

Physically it fit fine. I powered it up with a 1-Amp, 9V power supply, attached the Programming cable, it lit up and stayed blank. I loaded the MCUFRIEND_kbv library, and tried to run the Graphics Test example. It seems to be running on the Arduino DUE, the Serial Print window on COM12 cycles through various tests, printing out the number of microseconds it takes to run the screen-fill test, the Text test, etc. It cycles over and over.

But the LCD screen stays lit up and white, no text or rectangles or etc. on that.

I have a hunch I'm 9/10 there, just need to change a few things to see the LCD work right. Anyone have any suggestions?

Thanks all!

david_prentice · August 5, 2020, 6:21am

Please post a link to the actual shield that you have bought.
Please quote library example by name. Paste any output from the Serial Terminal.
Paste any build error messages.

David.

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