2.8"TFT LCD Sheild- NEED HELP

aaronarduinogod1 · January 2, 2025, 2:13am

Dear all of the world, I have ran into a big problem. My 2.8"TFT Sheild is always white and blank no matter what code I try on it. Here are the codes I tried using:

// IMPORTANT: SEE COMMENTS @ LINE 15 REGARDING SHIELD VS BREAKOUT BOARD USAGE.

// Graphics library by ladyada/adafruit with init code from Rossum
// MIT license

#ifndef _ADAFRUIT_TFTLCD_H_
#define _ADAFRUIT_TFTLCD_H_

#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <Adafruit_GFX.h>

// **** IF USING THE LCD BREAKOUT BOARD, COMMENT OUT THIS NEXT LINE. ****
// **** IF USING THE LCD SHIELD, LEAVE THE LINE ENABLED:             ****

#define USE_ADAFRUIT_SHIELD_PINOUT 1

class Adafruit_TFTLCD : public Adafruit_GFX {

public:
  Adafruit_TFTLCD(uint8_t cs, uint8_t cd, uint8_t wr, uint8_t rd, uint8_t rst);
  Adafruit_TFTLCD(void);

  void begin(uint16_t id = 0x9325);
  void drawPixel(int16_t x, int16_t y, uint16_t color);
  void drawFastHLine(int16_t x0, int16_t y0, int16_t w, uint16_t color);
  void drawFastVLine(int16_t x0, int16_t y0, int16_t h, uint16_t color);
  void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t c);
  void fillScreen(uint16_t color);
  void reset(void);
  void setRegisters8(uint8_t *ptr, uint8_t n);
  void setRegisters16(uint16_t *ptr, uint8_t n);
  void setRotation(uint8_t x);
  // These methods are public in order for BMP examples to work:
  void setAddrWindow(int x1, int y1, int x2, int y2);
  void pushColors(uint16_t *data, uint8_t len, boolean first);

  uint16_t color565(uint8_t r, uint8_t g, uint8_t b),
      readPixel(int16_t x, int16_t y), readID(void);
  uint32_t readReg(uint8_t r);

private:
  void init(),
  // These items may have previously been defined as macros
  // in pin_magic.h.  If not, function versions are declared:
#ifndef write8
      write8(uint8_t value),
#endif
#ifndef setWriteDir
      setWriteDir(void),
#endif
#ifndef setReadDir
      setReadDir(void),
#endif
#ifndef writeRegister8
      writeRegister8(uint8_t a, uint8_t d),
#endif
#ifndef writeRegister16
      writeRegister16(uint16_t a, uint16_t d),
#endif
      writeRegister24(uint8_t a, uint32_t d),
      writeRegister32(uint8_t a, uint32_t d),
#ifndef writeRegisterPair
      writeRegisterPair(uint8_t aH, uint8_t aL, uint16_t d),
#endif
      setLR(void), flood(uint16_t color, uint32_t len);
  uint8_t driver;

#ifndef read8
  uint8_t read8fn(void);
#define read8isFunctionalized
#endif

#ifndef USE_ADAFRUIT_SHIELD_PINOUT

#ifdef __AVR__
  volatile uint8_t *csPort, *cdPort, *wrPort, *rdPort;
  uint8_t csPinSet, cdPinSet, wrPinSet, rdPinSet, csPinUnset, cdPinUnset,
      wrPinUnset, rdPinUnset, _reset;
#endif
#if defined(__SAM3X8E__)
  Pio *csPort, *cdPort, *wrPort, *rdPort;
  uint32_t csPinSet, cdPinSet, wrPinSet, rdPinSet, csPinUnset, cdPinUnset,
      wrPinUnset, rdPinUnset, _reset;
#endif

#endif
};

// For compatibility with sketches written for older versions of library.
// Color function name was changed to 'color565' for parity with 2.2" LCD
// library.
#define Color565 color565

#endif

// IMPORTANT: SEE COMMENTS @ LINE 15 REGARDING SHIELD VS BREAKOUT BOARD USAGE.

// Graphics library by ladyada/adafruit with init code from Rossum
// MIT license

#ifndef _ADAFRUIT_TFTLCD_H_
#define _ADAFRUIT_TFTLCD_H_

#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <Adafruit_GFX.h>

// **** IF USING THE LCD BREAKOUT BOARD, COMMENT OUT THIS NEXT LINE. ****
// **** IF USING THE LCD SHIELD, LEAVE THE LINE ENABLED:             ****

#define USE_ADAFRUIT_SHIELD_PINOUT 1

class Adafruit_TFTLCD : public Adafruit_GFX {

public:
  Adafruit_TFTLCD(uint8_t cs, uint8_t cd, uint8_t wr, uint8_t rd, uint8_t rst);
  Adafruit_TFTLCD(void);

  void begin(uint16_t id = 0x9325);
  void drawPixel(int16_t x, int16_t y, uint16_t color);
  void drawFastHLine(int16_t x0, int16_t y0, int16_t w, uint16_t color);
  void drawFastVLine(int16_t x0, int16_t y0, int16_t h, uint16_t color);
  void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t c);
  void fillScreen(uint16_t color);
  void reset(void);
  void setRegisters8(uint8_t *ptr, uint8_t n);
  void setRegisters16(uint16_t *ptr, uint8_t n);
  void setRotation(uint8_t x);
  // These methods are public in order for BMP examples to work:
  void setAddrWindow(int x1, int y1, int x2, int y2);
  void pushColors(uint16_t *data, uint8_t len, boolean first);

  uint16_t color565(uint8_t r, uint8_t g, uint8_t b),
      readPixel(int16_t x, int16_t y), readID(void);
  uint32_t readReg(uint8_t r);

private:
  void init(),
  // These items may have previously been defined as macros
  // in pin_magic.h.  If not, function versions are declared:
#ifndef write8
      write8(uint8_t value),
#endif
#ifndef setWriteDir
      setWriteDir(void),
#endif
#ifndef setReadDir
      setReadDir(void),
#endif
#ifndef writeRegister8
      writeRegister8(uint8_t a, uint8_t d),
#endif
#ifndef writeRegister16
      writeRegister16(uint16_t a, uint16_t d),
#endif
      writeRegister24(uint8_t a, uint32_t d),
      writeRegister32(uint8_t a, uint32_t d),
#ifndef writeRegisterPair
      writeRegisterPair(uint8_t aH, uint8_t aL, uint16_t d),
#endif
      setLR(void), flood(uint16_t color, uint32_t len);
  uint8_t driver;

#ifndef read8
  uint8_t read8fn(void);
#define read8isFunctionalized
#endif

#ifndef USE_ADAFRUIT_SHIELD_PINOUT

#ifdef __AVR__
  volatile uint8_t *csPort, *cdPort, *wrPort, *rdPort;
  uint8_t csPinSet, cdPinSet, wrPinSet, rdPinSet, csPinUnset, cdPinUnset,
      wrPinUnset, rdPinUnset, _reset;
#endif
#if defined(__SAM3X8E__)
  Pio *csPort, *cdPort, *wrPort, *rdPort;
  uint32_t csPinSet, cdPinSet, wrPinSet, rdPinSet, csPinUnset, cdPinUnset,
      wrPinUnset, rdPinUnset, _reset;
#endif

#endif
};

// For compatibility with sketches written for older versions of library.
// Color function name was changed to 'color565' for parity with 2.2" LCD
// library.
#define Color565 color565

#endif

I am very sad and I stare into the lcd all the time but I see no hope.
COULD ANYONE HELP ME DEBUG THIS PROBLEM???????(very desprate)

High Hopes,
Aaron

van_der_decken · January 2, 2025, 2:52am

You haven't provided a link to the particular shield you're using.

You haven't told us what board you're trying to connect it to.

You haven't shown us your sketch.

All you have shown us is what appears to be two copies of the same header file from an Adafruit library.

I'm afraid that none of that is of any help whatsoever. So that help you say you desperately need will not be forthcoming until you rectify the lack of useful information. You might take the time to read How to get the best out of this forum and follow the advice to be found there.

aaronarduinogod1 · January 2, 2025, 2:54am

2.8 TFT Touch Shield for Arduino with Resistive Touch Screen v2 [STEMMA QT / Qwiic] : ID 1651 : Adafruit Industries, Unique & fun DIY electronics and kits

KurtE · January 2, 2025, 3:28am

What board do you have it connected to? How is it wired? Simply plugged in as a shield?

Have you tried the Adafruit_ili9341 library?

sonofcy · January 2, 2025, 3:36am

Doesn't help, follow the instructions re getting the most out of the forum.

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2.8"TFT LCD Sheild- NEED HELP

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