Difference between revisions of "TSC2102 Linux driver"

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  cat /sys/class/hwmon/hwmon0/device/temp1_input  -- result in m°C
 
  cat /sys/class/hwmon/hwmon0/device/temp1_input  -- result in m°C
 
* play sounds through [http://www.alsa-project.org/ ALSA interface]
 
* play sounds through [http://www.alsa-project.org/ ALSA interface]
 +
 +
===Envt variables===
 +
* You should define some ENVT variables to use the touchscreen API (tslib):
 +
export TSLIB_TSDEVICE=/dev/input/event0
 +
export TSLIB_TSEVENTTYPE=INPUT
 +
export TSLIB_CONFFILE=/etc/ts.conf
 +
export TSLIB_CALIBFILE=/etc/pointercal
 +
 +
===Device file creation if not exist===
 +
* ''/dev/input/event0'' is created from the infos got from:
 +
# cat /sys/class/input/event0/dev
 +
13:64
 +
# mkdir /dev/input
 +
# cd /dev/input/
 +
# mknod event0 c 13 64
 +
# ls -al
 +
drwxr-xr-x    2 root    root            0 Jan  1 00:39 .
 +
drwxr-xr-x    5 root    root            0 Jan  1 00:39 ..
 +
crw-r--r--    1 root    root      13,  64 Jan  1 00:39 event0
 +
#
  
 
==Quick test==
 
==Quick test==

Revision as of 17:24, 17 November 2007

Driver Installation

$ make linux-menuconfig

in 'device driver/input device support' select 'event interface' as kernel part
in 'device driver/input device support' select 'touchscreen ->tsc2102' as module 

in 'device driver/spi support' select 'spi support ->freescale iMX spi' as module
in 'device driver/spi support' select 'spi support ->TSC2102 codec' as module

in 'device driver/hardware monitoring support' select 'hardware monitoring support' as module

TSLib API Installation

Install the touchscreen API tslib

Architecture

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

Usage

start the drivers: 

# insmod /lib/modules/drivers/hwmon/hwmon.ko
# insmod /lib/modules/drivers/spi/spi_imx.ko
# insmod /lib/modules/drivers/spi/tsc2102.ko
# insmod /lib/modules/drivers/input/touchscreen/tsc2102_ts.ko

Then:

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

Envt variables

  • You should define some ENVT variables to use the touchscreen API (tslib):
export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_TSEVENTTYPE=INPUT
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_CALIBFILE=/etc/pointercal

Device file creation if not exist

  • /dev/input/event0 is created from the infos got from:
# cat /sys/class/input/event0/dev
13:64
# mkdir /dev/input
# cd /dev/input/
# mknod event0 c 13 64
# ls -al
drwxr-xr-x    2 root     root            0 Jan  1 00:39 .
drwxr-xr-x    5 root     root            0 Jan  1 00:39 ..
crw-r--r--    1 root     root      13,  64 Jan  1 00:39 event0
#

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
#

Links

Retrieved from "http://armadeus.org/wiki/index.php?title=TSC2102_Linux_driver&oldid=3078"