Difference between revisions of "TSC2102 Linux driver"

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  in 'device driver/hardware monitoring support' select 'hardware monitoring support' as module
 
  in 'device driver/hardware monitoring support' select 'hardware monitoring support' as module
  
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install the touchscreen API [[tslib]]
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install the touchscreen API <strong>[[tslib]]</strong>
  
 
==Architecture==
 
==Architecture==
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==Usage==
 
==Usage==
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First create the event0 node if not already existing:
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start the drivers:
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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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−
 
+
−
Then modify the touchscreen configuration file to use raw input:
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# cat /etc/ts.conf
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−
module_raw input
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module pthres pmin=1
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module variance delta=30
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module dejitter delta=100
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module linear
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−
 
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and now start the drivers:
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  # insmod /lib/modules/drivers/hwmon/hwmon.ko
 
  # insmod /lib/modules/drivers/hwmon/hwmon.ko
 
  # insmod /lib/modules/drivers/spi/spi_imx.ko
 
  # insmod /lib/modules/drivers/spi/spi_imx.ko

Revision as of 16:11, 17 November 2007

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

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/in0_input

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=3073"