MK-GT380T Module Kit (Transflective)

This module includes a 3.8” FSTN Positive (Transflective) QVGA monochrome display with six ultrabright LED backlights, a fully integrated analog touch panel, and integrated Amulet Controller Board. Added to the controller board is a 4megabit serial data flash chip to store µHTML pages, and digital potentiometers to control the backlight and contrast through the GUI. The Module Kit does not include the serial cable, Amulet Compiler Software, 5vDC power supply, nor stylus.

Board Assembly, component side

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DIP Switch Settings

Switch 1 -- Boot Mode Switch 2 -- Program Baud Rate Switch 3 -- RAM Test Switch 4 -- Touch Panel Mode

Boot Mode (DIP switch 1) -- This switch is monitored during a reboot to determine the operational mode of the controller board; ON is the normal mode and OFF is the FLASH program mode. Upon clicking on the Program FLASH button in the Compiler window, the Compiler will attempt to send out an auto "wake-up" message to the Amulet controller. If the page currently being displayed is set up to use the same baud rate using the META tag (if META is not present, the default is 115200) as the Compiler's uP comm rate, then the Amulet controller will change to a generic "Please wait while programming flash..." screen and commence programming. If the page has a baud rate different than what the Compiler is set to, then you should set the uP comm. rate in the Settings->RS232 dialog box to match the baud rate set by the META tag. This will allow the HTMLCompiler to wake up the Amulet at one-baud rate and then program it at another baud rate. The only time you should have to set Switch 1 to OFF (program mode) is when the project you compiled locks up the Amulet OS to the point where it won't accept the wake up message or if the Amulet OS has been corrupted and you need to reload the OS.

Program Baud Rate (DIP switch 2) -- This switch sets the baud rate used during a Flash Reprogram. The ON position sets the hardware to 19,200 baud; OFF sets the hardware to 115,200 baud. This setting must match the baud rate selected in the HTML compiler software.

RAM Test (DIP switch 3) -- Turn this switch ON and then reboot the controller board to auto-execute a RAM test. A RAM test failure will result in a zero (0) volt signal on the MEM PASS test pad on the board; a pass will result in a 3.3 volt signal. The switch must be returned to the normal mode (OFF) before the next reboot to continue normal operation.

Touch Panel Mode (DIP switch 4) -- This switch should remain ON during normal operation. Turn this switch OFF and then reboot the controller board to begin a touch panel calibration. The controller will display a series of three calibration targets. Use a stylus to touch the center of each target. If necessary, the controller will repeat the calibration. When calibration is complete, the controller will return to normal operation. The switch must be returned to the normal mode (ON) before the next reboot to continue normal operation.

Power Supply and Reset

Power Input Power is applied to the 1.3mm connector

CAUTION : Do not reverse the polarity on the power input. Doing so will permanently damage the module and invalidate your warranty.

Reset Switch -- This momentary pushbutton switch resets the Easy GUI controller chip as well as LCD power.

RS-232 Specs

Pin 1 - N/C

Pin 2 - TX (Amulet GUI module transmits data on Pin 2 while the PC receives data on Pin 2)

Pin 3 - RX (Amulet GUI module receives data on Pin 3 while the PC transmits data on Pin 3)

Pin 4 to 6 - Jumpered

Pin 5 - Ground

Pin 7 to 8 - Jumpered

Pin 9 - N/C

The serial parameters for communications between the Easy GUI client and the server are, as follows:

Baud Rate : 9600, 19200, 57600, or 115200bps
Parity: None
Data Bits: 8
Stop Bits: 1

See Communications Protocol for more information.

Touch Panel Calibration

Although the touch panel is factory calibrated, you may need to recalibrate it from time to time. The calibration data is stored in a FLASH ROM location called the Operating System (OS) resource segment. For this reason, you must always recalibrate the touch panel after restoring or updating the OS. To perform a touch panel calibration through hardware, proceed as follows:

Make sure that the DIP switch settings on SW2 are as follows:

Switch 1 ON — Boot Mode
Switch 2 OFF — Flash Mode Baud Rate
Switch 3 OFF — RAM Test
Switch 4 OFF — Touch Panel Mode

Press the Reset Switch to reboot the board. The board reboots in the calibration mode.

A series of three targets appear on the LCD.  The first two targets are x and y calibration targets.  Using a touch screen stylus, touch the center of each target as it appears.  (A stylus was included in the starter kit.) As a target is touched, the next target is displayed.

The third target is a calibration "check" target. Unlike the first two targets, this target appears momentarily pressed while touched. Depending on how you remove the stylus from this target, the calibration will either restart, or the calibration will end. To check calibration accuracy, move the stylus within the center of the target with a continuous touch, and then move the stylus off the edge of the target image. A well-calibrated target will remain pressed with the stylus in the center area, and should return to its pre-pressed state as the stylus moves off the edge of the target.

If the calibration is satisfactory, release the stylus anywhere within the target.  (The unit will proceed to the GUI Home Page.)  If the calibration is NOT satisfactory, release the stylus anywhere outside the target to restart the calibration.

Make sure you return the Touch Panel Mode DIP switch (Switch 4) to the Normal Mode (ON) before you reset or restart the board.  If not, the board will restart in the touch screen calibration mode.

Touchscreen calibration can also be entered via software, by using the Amulet:calibrate() function call.

Module Assembly Drawing, GUI 3.8" Starter Kit