Difference between revisions of "Example getkey"
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To use this program you will need the appropriate hardware:<br /> | To use this program you will need the appropriate hardware:<br /> | ||
A '''SOM-150ES carrier board'''.<br /> | A '''SOM-150ES carrier board'''.<br /> | ||
| − | A compatible '''SoM''' for that carrier board ('''SOM-9260M''', '''SOM-9620M''' and '''SOM-9X25''' all | + | A compatible '''SoM''' for that carrier board ('''SOM-9260M''', '''SOM-9620M''' and '''SOM-9X25''' are all compatible and available from EMAC).<br /> |
A compatible '''keypad''' (Available from EMAC, item# E202-21). | A compatible '''keypad''' (Available from EMAC, item# E202-21). | ||
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'''Usage example #1 needs to be specified as a heading, not just put in bold. It also needs to be capitalized as a proper heading, and needs to be given a name rather than a sequential number. The same applies to the rest of the usage examples. Additionally, example output should be given.''' | '''Usage example #1 needs to be specified as a heading, not just put in bold. It also needs to be capitalized as a proper heading, and needs to be given a name rather than a sequential number. The same applies to the rest of the usage examples. Additionally, example output should be given.''' | ||
| − | ====Usage Example | + | ====Usage Example. Displaying the Matrix Presently Associated with the Keypad==== |
<code>./getkey -d /dev/keypad0 -g</code> | <code>./getkey -d /dev/keypad0 -g</code> | ||
| − | The program will display the matrix presently associated with the keypad at | + | The program will display the matrix presently associated with the keypad at <code>/dev/keypad0''</code>. |
| − | ====Usage Example | + | ====Usage Example. Mapping the Keypad to a Matrix File==== |
<code>./getkey -d /dev/keypad0 -s Key-E020-21</code> | <code>./getkey -d /dev/keypad0 -s Key-E020-21</code> | ||
| − | The program will map the keypad at | + | The program will map the keypad at <code>/dev/keypad0</code> to the matrix file <code>Key-E020-21</code>. |
| − | ====Usage Example | + | ====Usage Example. Displaying the Character Presently Mapped to a Key on the Keypad==== |
<code>./getkey -d /dev/keypad0 -b</code> | <code>./getkey -d /dev/keypad0 -b</code> | ||
The program will wait until a key is pressed on the keypad. When a key is pressed it will display the corresponding character mapped to that pressed key, as specified in the matrix file. | The program will wait until a key is pressed on the keypad. When a key is pressed it will display the corresponding character mapped to that pressed key, as specified in the matrix file. | ||
Revision as of 12:00, 19 November 2013
This procedure provides an overview of how to open, build and run the getkey C example project using the Eclipse IDE.
Contents
Opening, Building and Uploading the Project Files
1. Open the C/C++ editing perspective.
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2. Open the egpc project files.
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3. Build the egpc project.
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4. Upload the egpc binary to the target machine.
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Description, Usage and Expected Behaviour
This is an example program for mapping keypad input to a character matrix using the keypad interface on the SOM-150ES.
To use this program you will need the appropriate hardware:
A SOM-150ES carrier board.
A compatible SoM for that carrier board (SOM-9260M, SOM-9620M and SOM-9X25 are all compatible and available from EMAC).
A compatible keypad (Available from EMAC, item# E202-21).
Usage for getkey
getkey [-d device -b -g -s file]
| d | Specifies the device node. The default is /dev/keypad
|
| b | Activates read blocking. The program will sleep until a key on the keypad is pressed. |
| g | Returns the current keypad matrix. |
| s | Sets the keypad matrix to that of the specified matrix file. (See project for example file Key-E020-21). If a matrix operation is not specified then the last key pressed is returned.
|
Note Arguments are evaluated in order. If blocking or device specifications are used, they must be declared before the matrix arguments on the command line.
Usage example #1 needs to be specified as a heading, not just put in bold. It also needs to be capitalized as a proper heading, and needs to be given a name rather than a sequential number. The same applies to the rest of the usage examples. Additionally, example output should be given.
Usage Example. Displaying the Matrix Presently Associated with the Keypad
./getkey -d /dev/keypad0 -g
The program will display the matrix presently associated with the keypad at /dev/keypad0.
Usage Example. Mapping the Keypad to a Matrix File
./getkey -d /dev/keypad0 -s Key-E020-21
The program will map the keypad at /dev/keypad0 to the matrix file Key-E020-21.
Usage Example. Displaying the Character Presently Mapped to a Key on the Keypad
./getkey -d /dev/keypad0 -b
The program will wait until a key is pressed on the keypad. When a key is pressed it will display the corresponding character mapped to that pressed key, as specified in the matrix file.
