What can I do with IGEP0022

(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 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