Difference between revisions of "TSC2102 Linux driver"

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(Remove duplicate tslib infos)
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* play sounds through [[ALSA| ALSA interface]]
 
* play sounds through [[ALSA| ALSA interface]]
 
* use touchscreen with [[Tslib]]
 
* use touchscreen with [[Tslib]]
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==TSLib API Installation==
 
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[[tslib | Install the Tslib touchscreen API]]
 
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===Envt variables===
 
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* You should define some ENVT variables to use the touchscreen API (tslib):
 
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export TSLIB_TSDEVICE=/dev/input/event0
 
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export TSLIB_TSEVENTTYPE=INPUT
 
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export TSLIB_CONFFILE=/etc/ts.conf
 
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export TSLIB_CALIBFILE=/etc/pointercal
 
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* you can add them to your ''/etc/profile'':
 
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# vi /etc/profile
 
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===Device file creation if not exist===
 
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* ''/dev/input/event0'' is created from the infos got from:
 
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# cat /sys/class/input/event0/dev
 
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13:64
 
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# mkdir /dev/input
 
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# cd /dev/input/
 
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# mknod event0 c 13 64
 
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# ls -al
 
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drwxr-xr-x    2 root    root            0 Jan  1 00:39 .
 
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drwxr-xr-x    5 root    root            0 Jan  1 00:39 ..
 
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crw-r--r--    1 root    root      13,  64 Jan  1 00:39 event0
 
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#
 
  
 
==Quick test==
 
==Quick test==
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  #
 
  #
  
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or start the touchscreen calibration tool:
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then, [[tslib | after having configured Tslib,]] start the touchscreen calibration tool:
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  /usr/bin/ts_calibrate
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  # /usr/bin/ts_calibrate
  
 
==Links==
 
==Links==

Revision as of 14:48, 18 November 2008

This page details the installation and the usage of the Linux drivers for the TSC2102 touchscreen & sound chip. Sound (ALSA) specific part can be found here.

Driver Installation

$ make linux-menuconfig

in Device Drivers  ---> Input device support  ---> select <*>   Event interface  as builtin
in Device Drivers  ---> Input device support  ---> [*]   Touchscreens  ---> select <M>   TSC 2102 based touchscreens as module

in Device Drivers  ---> SPI support  --->  select <M> Freescale iMX SPI controller as module
in Device Drivers  ---> SPI support  ---> --- TSC2102 codec support should be selected

in Device Drivers  ---> select <M> Hardware Monitoring support  ---> as module

$ make linux

Then reflash your Linux kernel and your Rootfs...

Architecture

Touchscreen (tsc2102_ts.ko) HWmon ALSA
TSC2102 Main driver (tsc2102.ko)
Linux API

Usage

  • load all the needed drivers:
# modprobe spi_imx
# modprobe tsc2102_ts
TI TSC2102 driver initializing
input: TSC2102 Touchscreen as /class/input/input0
TSC2102 touchscreen driver initialized
  • To check:
# lsmod
Module                  Size  Used by    Not tainted
tsc2102_ts              1188  0
tsc2102                10192  3 tsc2102_ts
hwmon                    916  1 tsc2102
spi_imx                 7136  0

Then, you can:

  • get temperature and voltage with hwmon (Hardware Monitoring) interface. For example:
# cat /sys/class/hwmon/hwmon0/device/temp1_input    -- result in m°C

Quick test

To quickly check driver fonctionnality, touch the screen and check that tsc2102 interrupts count is increasing: 

# cat /proc/interrupts
          CPU0
26:          0         MPU  IMX-uart
29:         17         MPU  IMX-uart
30:         22         MPU  IMX-uart
35:         12         MPU  imx-mmc
39:         14         MPU  I2C_IMX
40:         16         MPU  imx-spi.2
41:          0         MPU  imx-spi.1
59:       3682         MPU  i.MX Timer Tick
60:          0         MPU  DMA
61:          0         MPU  DMA
110:         0        GPIO  eth0
168:         0        GPIO  tsc2102
Err:         0
#

then, after having configured Tslib, start the touchscreen calibration tool: 

# /usr/bin/ts_calibrate

Links

Retrieved from "http://armadeus.org/wiki/index.php?title=TSC2102_Linux_driver&oldid=4985"