Matrix-orbital GLK12232-25-FGW Manual do Utilizador Página 14
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2.3 GPO
A unique feature of the GLK12232-25 is the ability to control relays and other external devices using a
General Purpose Output (3), which can provide up to 20 mA of current and +5Vdc from the positive side of
the GPO. This is limited by a 240 ohm resistor which is located directly above the positive pin as pictured
below in figure 14. If the device, which is being driven by a GPO, requires a relatively high current (such as
a relay) and has an internal resistance of its own greater than 250 ohms, then the 240 ohm resistor may be
removed and replaced with a Jumper.
Pin 1 - GND
Pin
2 + MAX: 20 mA, +5Vdc
Figure 14: General Purpose Output
WARNING If connecting a relay, be sure that it is fully clamped using
a diode and capacitor in order to absorb any electro-motive force (EMF)
which will be generated.
2.4 Protocol Select Jumpers
The Protocol Select Jumpers, pictured below in figure 15, provide the means necessary to toggle the
display module between RS-232, TTL and I
2
C protocols. As a default, the jumpers are set to RS-232 mode
with zero ohm resistors on the 232 jumpers. In order to place the display module in I
2
C mode you must
first remove the zero ohm resistors from the 232 jumpers and then solder the resistors on to the I
2
C jumpers.
The display will now be in I
2
C mode and have a default slave address of 0x50 unless it has been changed.
Similarly, in order to change the display to TTL mode, simply remove the zero ohm resistors from the 232
or I
2
C jumpers and solder them to the TTL jumpers.
Matrix Orbital GLK12232-25 9
- GLK12232-25 1
- Technical Manual 1
- Revision: 3.0 1
- Contents 2
- 1 Getting Started 6
- 1.2 Accessories 7
- Figure 8: 4X4 Keypad 8
- Matrix Orbital GLK12232-25 3 8
- 1.3 Features 9
- 1.4 Connecting to a PC 9
- 1.5 Installing the Software 10
- 2 Hardware Information 11
- 2.1 Power/Data Connector 12
- 2.4 Protocol Select Jumpers 14
- 2.5 Filesystem Lock Jumper 15
- 2.6 Manual Override 16
- 3 Troubleshooting 17
- 4 Communications 19
- 4.2 Turn Flow Control On 20
- 4.3 Turn Flow Control Off 21
- 4.4 Changing the I 21
- C Slave Address 21
- 4.5 Changing the Baud Rate 22
- CrystalSpeed 23
- 8×DesiredBaud 23
- 5.1.1 Font File Format 25
- 5.1.2 Creating a Font 25
- 5.2 Uploading a Font File 27
- 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
- 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 40
- 10.1.1 I2C Interface 41
- 10.1.2 RS232 Interface 41
- 10.4 Poll Key Press 42
- 10.5 Clear Key Buffer 42
- 10.6 Set Debounce Time 42
- 10.7 Set Auto Repeat Mode 43
- 10.8 Auto Repeat Mode Off 44
- 10.9 Assign Keypad Codes 44
- 11 Display Functions 45
- 11.5 Set Brightness 46
- 11.6 Set and Save Brightness 46
- 11.7 Set Contrast 46
- 12 Filesystem 47
- 12.1.1 File Upload Protocol 48
- Matrix Orbital GLK12232-25 44 49
- 12.2 Wipe Filesystem 50
- 12.3 Deleting a File 50
- 12.4 Get Filesystem Space 50
- 12.5 Get Filesystem Directory 51
- 12.6 Filesystem Upload 51
- 13 Data Security 52
- 13.2 Set Remember 53
- 13.3 Data Lock 53
- 13.4 Set and Save Data Lock 55
- 13.5 Dump the Filesystem 55
- 13.6 Writes the Customer Data 55
- 13.7 Reads the Customer Data 55
- 14 Miscellaneous 56
- 15 Command Summary 57
- 15.2 Fonts 58
- 15.3 Text 58
- 15.4 Bitmaps 59
- 15.5 Bar Graphs and Drawing 59
- 15.6 General Purpose Output 60
- 15.7 Keypad 60
- 15.8 Display Functions 61
- 15.9 Filesystem 61
- 15.10 Data Security 62
- 15.11 Miscellaneous 62
- 15.12 Command By Number 62
- 16 Appendix 64
- 16.2 Optical Characteristics 65
- 16.3 Physical Layout 65
- 16.4 Definitions 65
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