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Design your own GLCD Touch Clock | Design your own GLCD Touch Clock | ||
==TouchClock : a PIC18 GLCD touchscreen clock== | ==TouchClock : a PIC18 GLCD touchscreen clock== | ||
| − | + | A short video clip is sometimes better than a long explanation : | |
{{#ev:youtube|rTRGn16-ml8}} | {{#ev:youtube|rTRGn16-ml8}} | ||
| − | The idea of this project is to use a graphic LCD with a touchscreen and a built-in sprite editor to design your own clock | + | The idea of this project is to use a graphic LCD with a touchscreen and a built-in sprite editor to design your own clock, and shows how to connect a resistive touchscreen directly to a PIC with no additional hardware. |
| + | |||
| + | This project also includes a ready-to use touchscreen library for PIC | ||
==Circuit Schematic== | ==Circuit Schematic== | ||
| − | [[File: | + | This project is designed to run on an [[EasyPIC3]] development board, so no circuit schematic is available. |
| − | * | + | |
| − | + | This is how to connect the 4-wires resistive touchpanel directly to the PIC : | |
| − | * | + | |
| − | + | [[File:TouchClock-touchscreen.png]] | |
| + | |||
| + | How the library reads the X raw coordinate of a touch : | ||
| + | |||
| + | * X+ and X- are in high Z : RA0 and RA2 are inputs | ||
| + | * Y+ is set to +5V : RA3 is output high | ||
| + | * Y- is set to 0V : RA1 is output low | ||
| + | * X+ voltage is read by ADC | ||
| + | * Y+ is set to 0V : RA3 is output low | ||
| + | * Y- is set to 5V: RA1 is output high | ||
| + | * X- voltage is read by ADC and averaged with X+ value, the result is the raw X coordinate. | ||
| + | * The same is then done to read the Y coordinate, please see TSlib.c file in .ZIP file below. | ||
| + | |||
| + | X and Y raw coordinates are then adjusted using calibration coordinates to get X and Y coordinates in pixel. | ||
==C Source code== | ==C Source code== | ||
| − | + | Since this project has multiple source files, source code is not expanded here : please download archive file below. | |
| − | + | ||
==Download project== | ==Download project== | ||
| − | Download | + | Download TouchClock-project.zip file for mikroC : [[File:TouchClock-project.zip]] |
Includes : | Includes : | ||
| − | * [[mikroC PRO]] project files for [[PIC18F4620]], should work also with most | + | * [[mikroC PRO]] project files for [[PIC18F4620]], should work also with most PICs |
| − | * | + | * TouchClock C source code with resistive touchscreen library |
| − | * | + | * TouchClock .HEX files |
[[Category:Projects]] | [[Category:Projects]] | ||
[[Category:PIC18]] | [[Category:PIC18]] | ||
| + | |||
==Discussion and Comments== | ==Discussion and Comments== | ||
| + | {{#w4grb_rate:}} | ||
<discussion /> | <discussion /> | ||
Latest revision as of 22:02, 12 February 2012
Design your own GLCD Touch Clock
Contents |
TouchClock : a PIC18 GLCD touchscreen clock
A short video clip is sometimes better than a long explanation :
The idea of this project is to use a graphic LCD with a touchscreen and a built-in sprite editor to design your own clock, and shows how to connect a resistive touchscreen directly to a PIC with no additional hardware.
This project also includes a ready-to use touchscreen library for PIC
Circuit Schematic
This project is designed to run on an EasyPIC3 development board, so no circuit schematic is available.
This is how to connect the 4-wires resistive touchpanel directly to the PIC :
How the library reads the X raw coordinate of a touch :
- X+ and X- are in high Z : RA0 and RA2 are inputs
- Y+ is set to +5V : RA3 is output high
- Y- is set to 0V : RA1 is output low
- X+ voltage is read by ADC
- Y+ is set to 0V : RA3 is output low
- Y- is set to 5V: RA1 is output high
- X- voltage is read by ADC and averaged with X+ value, the result is the raw X coordinate.
- The same is then done to read the Y coordinate, please see TSlib.c file in .ZIP file below.
X and Y raw coordinates are then adjusted using calibration coordinates to get X and Y coordinates in pixel.
C Source code
Since this project has multiple source files, source code is not expanded here : please download archive file below.
Download project
Download TouchClock-project.zip file for mikroC : File:TouchClock-project.zip
Includes :
- mikroC PRO project files for PIC18F4620, should work also with most PICs
- TouchClock C source code with resistive touchscreen library
- TouchClock .HEX files
Discussion and Comments
Current user rating: 80/100 (108 votes)
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