The display was purchased in India from ROBOKITS. I sent them mail regarding the LCD and this was their response:
Sir I had tested the LCD and it was working fine. Extract and add all the 3 attached below libraries in arduino. You need to test example of Adafruit_TFTLCD_3029C (tft paint). If you want working video then please share your watsapp number.
3 attachments — Scan and download all attachments
Adafruit_TFTLCD_3029C.zip
130K Scan and download
Adafruit_TouchScreen-master.zip
8K Scan and download
Adafruit-GFX-Library-master.zip
321K Scan and download
I included these libraries and ran the tftpaint sketch.
There was some output from in the screen - but the colours seemed inverted and the touch control was not working- no painting !
The tftpaint sketch is as shown below:
#include <Adafruit_TFTLCD.h>
#include <registers.h>
//#include "mega_24_shield.h"
#include "uno_24_shield.h"
#include <TouchScreen.h>
// 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
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library
#include <TouchScreen.h>
#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
*/
#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
#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940
// 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();
uint16_t identifier = 0x9325;
tft.begin(0x8357);
//0x8357 Series contains:3029C / 9340 / 8357c / 9488
//0x9325 Series contains:9325 / 5408B
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(YP, OUTPUT);//XM
pinMode(XM, OUTPUT);//YP
//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
p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(), 0);
p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);
/*
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);
}
}
}
The lines:
tft.reset();
uint16_t identifier = 0x9325;
tft.begin(0x8357);
//0x8357 Series contains:3029C / 9340 / 8357c / 9488
//0x9325 Series contains:9325 / 5408B
Does this mean that this lcd is being treated as if its ID is 9325 and 8357 and is responding partially to their commands? Any thoughts?