What can I do with IGEP0022

(work in progress)

How to enable IGEP0022 support

Add following parameter in your kernel cmdline

buddy=igep0022

Using VGA output

omapdss.def_disp=dvi omapfb.mode=¿?¿?

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 EEPROM

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

You can easily interact with it by using the following example.

• First of all, open a Serial console such as Putty and configure it as explained here.
  

• Use 'echo' to write to the memory:
  

In order to read or write the EEPROM you must set the right I2C bus. The EEPROM memory in the IGEP0022 uses the second I2C bus (I2C 2) of the four I2C buses that the IGEPv2 OMAP can have.

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

• Check what you have actually wrote to the memory using 'cat':
  

cat /sys/devices/platform/i2c_omap.2/i2c-2/2-0050/eeprom

If everything was right you will see your message from the EEPROM.

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