What can I do with IGEP0022

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Revision as of 18:24, 4 July 2011 by Eballetbo (talk | contribs) (How to enable IGEP0022 support)

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(work in progress)

How to enable IGEP0022 support

The required kernel command line option here is

buddy=igep0022

Getting VGA output

The required kernel command line option here is omapfb.mode followed by the desired resolution, make sure to select a video mode compatible with your monitor

For example:

omapdss.def_disp=dvi omapfb.mode=dvi:1024x768-16@60

Note that you could connect both a VGA monitor and a DVI-D monitor and see the same image, as long as the video mode is compatible with both monitors.

Using TFT and Touchscreen

Seiko 7.0 inch WVGA (800 x RGB x 480) TFT:

omapdss.def_disp=lcd-70

Powertip 4.3 inch (480 x RGB x 272) TFT:

omapdss.def_disp=lcd-43

To configure the touchscreen, add "Configured Touchscreen" in "ServerLayout" section and remove "Configured Mouse"

Section "ServerLayout"
   Identifier    "Default Layout"
   Screen        "Default Screen"
   InputDevice    "Generic Keyboard"
#   InputDevice    "Configured Mouse"
   InputDevice    "Configured Touchscreen"
   Option         "AllowEmptyInput" "no"
EndSection

calibrate it yourself until you are happy with the result, for example:

/etc/init.d/xserver-nodm stop
TSLIB_CALIBFILE=/etc/pointercal TSLIB_TSDEVICE=/dev/input/touchscreen0 TSLIB_CONSOLEDEVICE=none ts_calibrate
/etc/init.d/xserver-nodm start

Using Telit Modem

Using TVP5151 Video Decoder

Using EEPROM

The IGEP0022 expansion board provides an AT24C01B serial EEPROM memory which is connected to the OMAP via I2C.

You can use easily simple reads/writes to access to the eeprom:

echo "hello world!" > /sys/devices/platform/i2c_omap.2/i2c-2/2-0050/eeprom
cat /sys/devices/platform/i2c_omap.2/i2c-2/2-0050/eeprom

Or read/write from userspace using i2c-tools:

i2cget <bus> <chip> <register>
i2cset <bus> <chip> <register> <value>

For example, the following writes the value 0x22 to register 0x10 of device 0x50 on i2c bus 2:

i2cset -f -y 2 0x50 0x10 0x22
i2cget -f -y 2 0x50 0x10

See also: i2dump(8), i2cget(8) and i2cset(8) man page

Using CAN bus

Several tools are provided by socketCAN:

  • candump: dump traffic on a CAN network
  • cansend: simple command line tool to send CAN-frames via CAN_RAW sockets
  • cangen: CAN frames generator for testing purpose
  • canplayer: send CAN frames from a file to a CAN interface
/sbin/ip link set can0 up type can bitrate 125000

On the receiver side:

candump can0

On the sender side:

cansend can0 123#AABBCCDD
cansend can0 123#R 
cansend can0 1F334455#1122334455667788
cansend can0 1F334455#R

On the receiver side, you must see the following messages:

can0  123  [4] AA BB CC DD
can0  123  [0] remote request
can0  1F334455  [8] 11 22 33 44 55 66 77 88
can0  1F334455  [0] remote request

Switch roles and do again