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• 128 byte buffered communication
• 16 KB flash memory for fonts and bitmaps
• Lightning fast communication speeds, up to 115 kbps for Serial and 100 kbps for I
2
Cprotocol
• * Use of up to 127 modules on the same 2 wire I
2
C interface
• Display text using built in or user supplied fonts
• Software adjustable contrast and backlight brightness
• Default 19.2 kbps serial communication speed
• Extended voltage, and efficient power supply available
1.4 Connecting to a PC
The GLT240128 connects seamlessly to a PC and it is an excellent means of testing the functionality
and uploading new fonts and bitmaps. For the Non-USB version, you will require a standard RS-232 9-pin
serial cable such as the one pictured in Figure 7, as well as a modified 5V or 12V power adapter, depending
on the voltage model, such as the ones pictured in Figures 2 and 3. For the USB model, of course, all you
will need is a USB to mini USB cable such as the one in Figure 4.
1.4.1 Connection for Non-USB Modules
In order to connect your Non-USB display to a personal computer follow these easy instructions:
1. Plug the serial cable into the com port you wish to use.
2. Connect the appropraite modified power adapter to a power lead from your PC power supply (you will
have to open your computer case).
3. Connect the serial cable to the DB-9 connector on the back of the display.
4. Connect the appropriate power adapter to the 4-pin connector on the back of the display.
WARNING DO NOT use the standard floppy drive power connector on
the Power/Data Connector, as this will not provide you with the correct
voltage and will damage the display module.
Matrix Orbital GLT240128 4
- GLT240128 1
- Technical Manual 1
- Revision: 1.2 1
- Contents 2
- 1 Getting Started 6
- 1.2 Accessories 7
- 1.3 Features 8
- 1.4 Connecting to a PC 9
- 1.5 Installing the Software 10
- 2 Hardware Information 11
- 2.1 Communication Connectors 13
- 2.4 Power Through DB-9 Jumper 16
- 2.6 Protocol Select Jumpers 17
- 2.7 Filesystem Lock Jumper 18
- 2.8 Manual Override 19
- 3 Troubleshooting 20
- 4 Communications 21
- C Transaction Example 22
- 4.2 Turn Flow Control On 23
- 4.3 Turn Flow Control Off 24
- 4.4 Changing the I 24
- C Slave Address 24
- 4.5 Changing the Baud Rate 25
- 5.1 Introduction 27
- 5.2 Uploading a Font File 29
- 5.3 Setting the Current Font 29
- 5.4 Font Metrics 30
- 5.5 Set Box Space Mode 31
- 6.1 Introduction 31
- 6.2 Move Cursor Home 31
- 6.5 Auto Scroll On 32
- 7 Bitmaps 33
- 8 Bar Graphs and Drawing 35
- 8.3 Draw Pixel 36
- 8.4 Drawing a Line 36
- 8.5 Continue a Line 37
- 8.6 Draw a Rectangle 37
- 8.7 Drawing a Solid Rectangle 37
- 8.8 Initializing a Bar Graph 38
- 8.9 Drawing a Bar Graph 39
- 8.11 Shifting a Strip Chart 40
- 9 Touchpad 41
- 9.2 Set Touch Region 42
- 9.3 Delete Touch Region 42
- 9.4 Delete All Touch Regions 42
- 9.5 Set Touch Mode 43
- 9.6 Set Region Reporting Mode 43
- 9.7 Set Dragging Threshold 44
- 9.8 Set Pressure Threshold 44
- 9.9 Run Touchpad Calibration 44
- 10 Display Functions 45
- 10.4 Display Off 46
- 10.5 Set Brightness 46
- 10.6 Set and Save Brightness 46
- 10.7 Set Contrast 47
- 10.8 Set and Save Contrast 47
- 11 Filesystem 48
- 11.2 Wipe Filesystem 50
- 11.3 Deleting a File 51
- 11.4 Get Filesystem Space 51
- 11.5 Get Filesystem Directory 53
- 11.6 Filesystem Upload 53
- 11.7 Downloading a File 53
- 12 Data Security 54
- 12.2 Set Remember 55
- 12.3 Data Lock 55
- 12.4 Set and Save Data Lock 57
- 12.5 Dump the Filesystem 57
- 12.6 Write Customer Data 57
- 12.7 Read Customer Data 57
- 13 Miscellaneous 58
- 14 Command Summary 60
- 14.4 Bitmaps 61
- 14.5 Bar Graphs and Drawing 61
- 14.6 Touchpad 62
- 14.7 Display Functions 62
- 14.8 Filesystem 63
- 14.9 Data Security 63
- 14.10 Miscellaneous 64
- 14.11 Command By Number 64
- 15 Appendix 66
- 15.3 Physical Layout 67
- Figure 24: Physical Diagram 68
- Matrix Orbital GLT240128 63 68
- 15.4 Ordering Information 69
- 15.5 Definitions 69
- 15.7 Revision History 70
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