Matrix-orbital GLK19264-7T-1U Manual de usuario Pagina 26
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Valorado. / 5. Basado en revisión del cliente
As you can see the letter h will take up five bytes with the last five bits being zero padded to form a full
byte. So if you continue the process you will get the character data as seen in table 5.1.2.
Character Data
Character Data Byte Size (For Reference)
h 0x84 0x2D 0x98 0xC6 0x20 0x05
i 0x43 0x24 0x84 0x03
j 0x2D 0x98 0x19 0x60 0x04
The second part of the font file is the character table. The character table is comprised of three bytes for
every glyph in the font file.
The first two bytes represents the position, in bytes, of the glyph stored MSB LSB referenced from the
beginning of the file (including the header. The third byte is the width of the glyph in pixels. So because
there will be 0x09 bytes in the character table (three bytes for each glyph) and four bytes in the header
section, the first entry in the table will be 13, or 0x00 0x0D in hexadecimal, and 0x05 for the width.
To calculate the second entry in the character table, representing the position and width of the second
glyph, take the offset of the first entry and add the size of the first bitmap in bytes. Since the first glyph
occupies 0x05 bytes as seen in table 5.1.2 above, and the offset is 0x00 0x0D, the offset of the second entry
will be 0x00 0x12 and the width of the glyph is 0x03.
Calculate the third entry the same way as the second to get table 9 below.
Table 9: Character Table
High Offset (MSB) Low Offset (LSB) Character Width
h 0x00 0x0D 0x05
i 0x00 0x12 0x03
j 0x00 0x15 0x04
Once completed, place the character table after the header and the character data aat the end, as seen in
table 10.
Table 10: Sample Font File
0x05 0x07 0x68 0x6A 0x00 0x0D 0x05 0x00
0x12 0x03 0x00 0x15 0x04 0x84 0x2D 0x98
0xC6 0x20 0x43 0x24 0x84 0x2D 0x98 0x19
0x60
Red = Header
Blue = Character Table
Purple = Character Data
5.2 Uploading a Font File
Matrix Orbital GLK19264-7T-1U 21
- GLK19264-7T-1U 1
- Technical Manual 1
- Revision: 1.2 1
- Contents 2
- 1 Getting Started 6
- Figure 3: Standard Power 7
- Figure 4: 5V Power Adapter 7
- 1.3 Features 9
- 1.4 Connecting to a PC 9
- 1.5 Installing the Software 10
- 2 Hardware Information 11
- 2.4 Protocol Select Jumpers 15
- 2.5 Manual Override 16
- 3 Troubleshooting 17
- 4 Communications 19
- C Transaction Example 20
- 4.1.3 Serial Communication 20
- 4.1.4 USB Communication 20
- 4.2 Turn Flow Control On 21
- 4.3 Turn Flow Control Off 21
- 4.4 Changing the I 22
- C Slave Address 22
- 4.5 Changing the Baud Rate 22
- CrystalSpeed 23
- 8×DesiredBaud 23
- 5.1.2 Creating a Font 25
- 5.2 Uploading a Font File 26
- 5.3 Setting the Current Font 27
- 5.4 Font Metrics 28
- 5.5 Set Box Space Mode 28
- 6.1 Introduction 29
- 6.2 Move Cursor Home 29
- 6.5 Auto Scroll On 30
- 6.6 Auto Scroll Off 30
- 7 Bitmaps 31
- 7.4 Drawing a Bitmap Directly 32
- 8 Bar Graphs and Drawing 33
- 8.3 Draw Pixel 34
- 8.4 Drawing a Line 34
- 8.5 Continue a Line 34
- 8.6 Draw a Rectangle 35
- 8.7 Drawing a Solid Rectangle 35
- 8.8 Initializing a Bar Graph 36
- 8.9 Drawing a Bar Graph 36
- 8.11 Shifting a Strip Chart 38
- 9 General Purpose Output 39
- 10 Keypad 41
- 10.4 Poll Key Press 43
- 10.5 Clear Key Buffer 43
- 10.6 Set Debounce Time 43
- 10.7 Set Auto Repeat Mode 44
- 10.8 Auto Repeat Mode Off 45
- 10.9 Assign Keypad Codes 45
- 11 Display Functions 46
- 11.3 Display On 47
- 11.4 Display Off 47
- 11.5 Set Brightness 47
- 11.6 Set and Save Brightness 48
- 11.7 Set Contrast 48
- 12 Filesystem 49
- 12.2 Wipe Filesystem 51
- 12.3 Deleting a File 53
- 12.4 Get Filesystem Space 53
- 12.5 Get Filesystem Directory 54
- 12.6 Filesystem Upload 54
- 12.7 Downloading a File 54
- 13 Data Security 55
- 13.2 Set Remember 56
- 13.3 Data Lock 56
- 13.4 Set and Save Data Lock 58
- 13.5 Dump the Filesystem 58
- 13.6 Write Customer Data 58
- 13.7 Read Customer Data 58
- 14 Miscellaneous 59
- 15 Command Summary 61
- 15.4 Bitmaps 62
- 15.5 Bar Graphs and Drawing 62
- 15.6 General Purpose Output 63
- 15.7 Keypad 63
- 15.8 Display Functions 64
- 15.9 Filesystem 64
- 15.10 Data Security 65
- 15.11 Miscellaneous 65
- 15.12 Command By Number 66
- 16 Appendix 67
- 16.2 Optical Characteristics 68
- 16.3 Physical Layout 68
- Figure 24: Physical Diagram 69
- 16.4 Ordering Information 71
- 16.5 Definitions 71
- 16.7 Revision History 71
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