Difference between revisions of "AXEL Lite SOM/AXEL Lite Evaluation Kit/Interfaces and Connectors/Touchscreen"
(Created page with "<section begin=History/> {| style="border-collapse:collapse; " !colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History |- !style="border-le...") |
(→Description) |
||
| Line 21: | Line 21: | ||
The touch controller is a TI TSC2003 device, connected to the I²C2 bus (address 0x1001000b). | The touch controller is a TI TSC2003 device, connected to the I²C2 bus (address 0x1001000b). | ||
| + | |||
| + | [[File:AXEL Lite-EVB-Touchscreen-connector.png|thumb|center| 500px|Touchscreen connector]] | ||
===Signals === | ===Signals === | ||
Revision as of 09:13, 28 October 2020
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| Version | Issue Date | Notes | |
| 1.0.0 | Oct 2020 | First DESK release | |
Touchscreen[edit | edit source]
Description[edit | edit source]
The 4-wire resistive touch controller signals are routed to J50, which is a 4 pin (1mm pitch vertical) ZIF connector for the 4-wires resistive controller.
The touch controller is a TI TSC2003 device, connected to the I²C2 bus (address 0x1001000b).
Signals[edit | edit source]
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 1 | - | TSC_YP | Touch controller Y+ | |
| 2 | - | TSC_XP | Touch controller X+ | |
| 3 | - | TSC_YM | Touch controller Y- | |
| 4 | - | TSC_XM | Touch controller X- |
Device mapping[edit | edit source]
The device is typically mapped to /dev/touchscreen0 device in Linux.
The touch controller is attached to the generic Linux input event interface (evdev).
Device usage[edit | edit source]
The simplest tools for touch screen management are the tslib library and ts_tools utilities. To calibrate the touch screen, the ts_calibrate command line tool is available.
After calibration, the touch screen can be tested using the graphical ts_test utility or the ts_print command line tool.
