Description

The DM-TFT28-103 display module, specifications and other resources are available from DisplayModule.com.

• 2.8"
• Resistive Touch Screen
• SD-card slot
• 262K color depth
• 240x320
• 8-bit interface
• 4 LED backlit

The display module has a 40-pin connector and requires a shield (DM-ADTAU-001) to be compatible with Arduino pinning.

Pinning

The following pins are used (not including GND and VCC) when connected to the DM-ADTAU-001 adapter:

1) For LPC1549 some hardware settings are needed. Look at http://www.displaymodule.com/pages/mbed for details.

2) The functionallity of the D10 pin is controlled with the slider on the DM-ADTAU-001 adapter board. It must be in the SD_CS position for SD Card to work. The T_IRQ position does nothing (the driver does not use interrupts).

Compatibility

The display module has been tested with the following platforms:

Software

There is a library to get you started with the displays:

To use the library:

#include "mbed.h"

#include "DmTftIli9325.h"
#include "DmTouch.h"

/* Displays with adapter */
#define DM_PIN_SPI_MOSI   A0
#define DM_PIN_SPI_MISO   D9
#define DM_PIN_SPI_SCLK   A1
#define DM_PIN_CS_TOUCH   D8
#define DM_PIN_CS_TFT     A3
#define DM_PIN_CS_SDCARD  D10

DmTftIli9325 tft;  /* DM_TFT28_103 and DM_TFT24_104 */

//DmTouch touch(DmTouch::DM_TFT28_103, DmTouch::Software); /* For LPC4088 QuickStart Board */
DmTouch touch(DmTouch::DM_TFT28_103);

DigitalInOut csTouch(DM_PIN_CS_TOUCH, PIN_OUTPUT, PullUp, 1);
DigitalInOut csDisplay(DM_PIN_CS_TFT, PIN_OUTPUT, PullUp, 1);
DigitalInOut csSDCard(DM_PIN_CS_SDCARD, PIN_OUTPUT, PullUp, 1);

int main() {
  tft.init();
  tft.drawString(20, 20, "x:");
  tft.drawString(100, 20, "y:");
  touch.init();
  while(true) {
    ...
  }
}

To use the SD Card instead of the Touch Screen include the SDFileSystem library in your project and initialize like this:

#include "mbed.h"

#include "DmTftIli9325.h"
#include "SDFileSystem.h"

/* Displays with adapter */
#define DM_PIN_SPI_MOSI      A0
#define DM_PIN_SPI_MISO      D9
#define DM_PIN_SPI_SCLK      A1
#define DM_PIN_CS_TOUCH      D8
#define DM_PIN_CS_TFT        A3
#define DM_PIN_CS_SDCARD     D10
#define DM_PIN_SD_SPI_MOSI   D11
#define DM_PIN_SD_SPI_MISO   D12
#define DM_PIN_SD_SPI_SCLK   D13

DmTftIli9325 tft;  /* DM_TFT28_103 and DM_TFT24_104 */

SDFileSystem sd(DM_PIN_SD_SPI_MOSI, DM_PIN_SD_SPI_MISO, DM_PIN_SD_SPI_SCLK, DM_PIN_CS_SDCARD, "sd"); // mosi,miso,clk,cs

DigitalInOut csTouch(DM_PIN_CS_TOUCH, PIN_OUTPUT, PullUp, 1);
DigitalInOut csDisplay(DM_PIN_CS_TFT, PIN_OUTPUT, PullUp, 1);
DigitalInOut csSDCard(DM_PIN_CS_SDCARD, PIN_OUTPUT, PullUp, 1);

int main() {
  const char* fname = "/sd/logop565.bmp";

  tft.init();
  
  while (true) {
    FILE *fp = fopen(fname, "r");
    if (fp != NULL) {
      ...
    }
  }
}

There are also some demo programs: