How to control Devices from user space (command line)
This page lists the most important devices and drivers that are specific to this board. And how they can be accessed from user space.
Headset out / AUX in
The audio amplifier is controlled by (state=0: AUX IN, state=1: AUX OUT)
echo $state >/sys/devices/virtual/gpio/gpio55/value
If enabled, you can't use the AUX IN
power (state=0: off, state=1: on)
echo $state >/sys/devices/virtual/gpio/gpio57/value
power (state=0: off, state=1: on) - you may have to switch on/off/on to reset the GPS chip
echo $state >/sys/devices/virtual/gpio/gpio145/value
device file (use 9600 baud)
if the external antenna is active can be determined through
cat /sys/devices/virtual/gpio/gpio144/value # 1=ext. ant.
AUX and Power button
button status can be read through
cat /sys/devices/virtual/gpio/gpio7/value # 0=AUX pressed
The AUX button is available through the TPS driver as a key event. The power button is available through the TPS driver as a key event.
LEDs are switched through the TCA6507 driver
**** FIXME **** echo $state >/sys/devices/virtual/gpio/gpio70/value # AUX - red echo $state >/sys/devices/virtual/gpio/gpio71/value # AUX - green echo $state >/sys/devices/virtual/gpio/gpio78/value # POWER - red echo $state >/sys/devices/virtual/gpio/gpio79/value # POWER - green
Depending on the exact version of the board there may be I2C devices (besides the touch screen controller).
You should install http://packages.debian.org/de/lenny/i2c-tools resp. http://www.lm-sensors.org/wiki/I2CTools
There should be the following commands
ADCs of the TPS65950
are available through /dev/twl4030-madc and the madc driver. See e.g. http://www.jumpnowtek.com/index.php?option=com_content&view=article&id=79&Itemid=91
ADC0: BATID (default: 0V) ADC1: BATTEMP (default: 1.8V) ADC2: ADC2IN (default: 0V) ADC7: MICSENSE (no headset / short / headset)