Sainsmart 3.2" TFT LCD with shield

system · September 11, 2014, 11:11pm

OK so I got this off eBay it is a Sainsmart 3.2" TFT LCD and it came with the shield for the Arduino Mega 2560 which is what I am using. However I can not get anything but a white screen with this thing I have tried running the UTFT examples on it and I have also tried running the ITDB02 examples on it. I don't know what I am doing wrong but I hope someone can help. The pin out on the TFT LCD is as follows

1=GND
2=VCC
3=NC
4=RS
5=WR
6=RD
7=DB8
8=DB9
9=DB10
10=DB11
11=DB12
12=DB13
13=DB14
14=DB15
15=CS
16=F_CS
17=REST
18=NC
19=LED_A
20=NC
21=DB0
22=DB1
23=DB2
24=DB3
25=DB4
26=DB5
27=DB6
28=DB7
29=T_CLK
30=T_CS
31=T_DIN
32=NC
33=T_D0
34=T_IRQ
35=SD_D0
36=SD_CLK
37=SD_DIN
38=SD_CS
39=NC
40=NC

I am having trouble trying to figure what pins I need to put in sketch I have tried the defaults they give to no avail and I have tried the configuration 4,5,6,15

system · September 12, 2014, 2:30am

For this group of parts: [Discontinued] SainSmart Mega2560+1602 LCD Keypad Shield Kit For ATMEL – SainSmart.com you should not have to change anything to get the demo to run, you only have to select the correct demo project.

That means for a Mega, with the above mentioned 20-011-919 shield, it should be: UTFT myGLCD(ITDB32S,38,39,40,41);

Please note that the above is only my best guess, based on the information you provided.For future posts, please read the sticky note at the head of this forum section on how to post your question as it lacks everything people would need to help (model numbers, code examples, etc).

system · September 12, 2014, 12:17pm

OK the sketch I am using is the Henning Karlsen UTFT Demo for the 320x240.

// UTFT_Demo_320x240 (C)2012 Henning Karlsen
// web: Electronics - Henning Karlsen
//
// This program is a demo of how to use most of the functions
// of the library with a supported display modules.
//
// This demo was made for modules with a screen resolution
// of 320x240 pixels.
//
// This program requires the UTFT library.
//

#include <UTFT.h>

// Declare which fonts we will be using
extern uint8_t SmallFont[];

// Uncomment the next line for Arduino 2009/Uno
//UTFT myGLCD(ITDB32S,38,39,40,41); // Remember to change the model parameter to suit your display module!

// Uncomment the next line for Arduino Mega
UTFT myGLCD(ELEE32_REVB,38,39,40,41); // Remember to change the model parameter to suit your display module!

void setup()
{
randomSeed(analogRead(0));
//pinMode(A0,OUTPUT);
//digitalWrite(A0,HIGH);
// Setup the LCD
myGLCD.InitLCD();
myGLCD.setFont(SmallFont);
}

void loop()
{
int buf[318];
int x, x2;
int y, y2;
int r;

// Clear the screen and draw the frame
myGLCD.clrScr();

myGLCD.setColor(255, 0, 0);
myGLCD.fillRect(0, 0, 319, 13);
myGLCD.setColor(64, 64, 64);
myGLCD.fillRect(0, 226, 319, 239);
myGLCD.setColor(255, 255, 255);
myGLCD.setBackColor(255, 0, 0);
myGLCD.print("* Universal Color TFT Display Library *", CENTER, 1);
myGLCD.setBackColor(64, 64, 64);
myGLCD.setColor(255,255,0);
myGLCD.print("http://electronics.henningkarlsen.com", CENTER, 227);

myGLCD.setColor(0, 0, 255);
myGLCD.drawRect(0, 14, 319, 225);

// Draw crosshairs
myGLCD.setColor(0, 0, 255);
myGLCD.setBackColor(0, 0, 0);
myGLCD.drawLine(159, 15, 159, 224);
myGLCD.drawLine(1, 119, 318, 119);
for (int i=9; i<310; i+=10)
myGLCD.drawLine(i, 117, i, 121);
for (int i=19; i<220; i+=10)
myGLCD.drawLine(157, i, 161, i);

// Draw sin-, cos- and tan-lines
myGLCD.setColor(0,255,255);
myGLCD.print("Sin", 5, 15);
for (int i=1; i<318; i++)
{
myGLCD.drawPixel(i,119+(sin(((i*1.13)*3.14)/180)*95));
}

myGLCD.setColor(255,0,0);
myGLCD.print("Cos", 5, 27);
for (int i=1; i<318; i++)
{
myGLCD.drawPixel(i,119+(cos(((i*1.13)*3.14)/180)*95));
}

myGLCD.setColor(255,255,0);
myGLCD.print("Tan", 5, 39);
for (int i=1; i<318; i++)
{
myGLCD.drawPixel(i,119+(tan(((i*1.13)*3.14)/180)));
}

delay(2000);

myGLCD.setColor(0,0,0);
myGLCD.fillRect(1,15,318,224);
myGLCD.setColor(0, 0, 255);
myGLCD.setBackColor(0, 0, 0);
myGLCD.drawLine(159, 15, 159, 224);
myGLCD.drawLine(1, 119, 318, 119);

// Draw a moving sinewave
x=1;
for (int i=1; i<(31820); i++)
{
x++;
if (x==319)
x=1;
if (i>319)
{
if ((x==159)||(buf[x-1]==119))
myGLCD.setColor(0,0,255);
else
myGLCD.setColor(0,0,0);
myGLCD.drawPixel(x,buf[x-1]);
}
myGLCD.setColor(0,255,255);
y=119+(sin(((i1.1)3.14)/180)(90-(i / 100)));
myGLCD.drawPixel(x,y);
buf[x-1]=y;
}

delay(2000);