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Host Display Comments
0xFE Command Prefix
0x24 Upload Font File Command
0x01 Reference ID
0x19 Size (LSB)
0x00 Size (MSB)
0x01 Confirmation Byte
0x01 Confimation Byte
0x05 Font Width
0x05 Echo Font Width
0x01 Confimation Byte
0x07 Font Height
0x07 Echo Font Height
0x01 Confimation Byte
0x49 Font ASCII Start Value
0x49 Echo Font ASCII Start Value
0x01 Confimation Byte
... ... ...
0x60 Last Font File Byte
0x60 Echo Last Font File Byte
0x01 Confirm Upload Finished
Table 48: Upload Protocol
The last part of uploading a font file is to upload the file data. After transmitting each byte of the file the
module will echo the byte and wait for a confirmation byte of 0x01 until the file has completed uploading.
Below is an example of uploading the font file which we created in Section 5.1.2 on page 22.
At times that the display or the host sees anything else other than 0x01 for confirmation (usually a 0x08)
the upload is aborted.
NOTES
• The GLT24064 has watch dog timer, set to 2.1 seconds in between transmissions, in
order prevent the display module from staying in a waiting state.
• Once the timeout has been reached the timer will reset the display and issue a 0xFE
0xD4 response to the host to signal that this has happened.
Matrix Orbital GLT240128 44
- 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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