Revision as of 11:07, 10 September 2012

IGEPv2 EXPANSION Tutorial Guides

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Overview

This is the 2/3 chapter of IGEPv2 Expansion Tutorial Guide.

We will learn some basic tasks.

What can I do

How to use TFT and Touchscreen

Seiko and Powertip touch screens are not supported by default in IGEPv2. Use the following steps for it:

Edit igep.ini file to configure your touch screen, you can do this adding following kernel cmdline parameter

• In Seiko screen add the following line:

omapdss.def_disp=lcd-70

• In Powertip screen add the following line:

omapdss.def_disp=lcd-43

How to use Telit Modem

Telit modem is not supported by default in IGEPv2 Expansion and IGEP Berlin. Configure this adding following kernel cmdline parameter

buddy.modem=yes 

• Power up the modem using the next commands:

echo 0 > /sys/class/gpio/gpio140/value
echo 1 > /sys/class/gpio/gpio141/value
sleep 1
echo 0 > /sys/class/gpio/gpio141/value

• Once the modem is on (led near power button is blinking now), you can interact with it via UART 2.

You can use Microcom to comunicate with it from the serial debug console:

microcom -s 115200 /dev/ttyO1

• To check the modem status use the command:
  

at

• Answer should be OK.
  
• Now unlock it by inserting your SIM card PIN number. Use the command:

at+cpin=<PIN>

• If you correctly inserted the PIN number, the answer should be OK. If you fail more than 3 times, your SIM card will lock and you will have to insert PUK number.
• Now you are ready to use the GSM/GPS modem.
  

From How to use Telit Modem

How to use TVP5151 Video Decoder

Configure TVP5151

Use the following steps to configure analog video:

• Connect a video composite input to J501 connector from IGEPv2 Expansion (near CAN Bus) or J402 connector from IGEP BERLIN (near HDMI output)
• Connect a screen, for example HDMI monitor.
• Refresh repositories and accept it.

zypper ref 

• Install video4linux2 plugin

zypper in gst-plugins-good-video4linux2

Play with TVP5151

• Load OMAP ISP kernel module
  

modprobe omap3-isp

• Configure ISP, for PAL resulution use 720x576 for NTSC resolution use 720x480 for IGEPv2 Expansion:
  

media-ctl -r -l '"tvp5150 2-005c":0->"OMAP3 ISP CCDC":0[1], "OMAP3 ISP CCDC":1->"OMAP3 ISP CCDC output":0[1]'
media-ctl -v --set-format '"tvp5150 2-005c":0 [UYVY 720x480]'
media-ctl -v --set-format '"OMAP3 ISP CCDC":0 [UYVY 720x480]'
media-ctl -v --set-format '"OMAP3 ISP CCDC":1 [UYVY 720x480]' 

• Export display

export DISPLAY=:0.0 

• Launch gstreamer

gst-launch-0.10 -v v4l2src device=/dev/video2 queue-size=8 ! video/x-raw-yuv,format=\(fourcc\)UYVY,width=720,height=480 ! ffmpegcolorspace ! autovideosink

• Now you can see in your IGEP screen a result similar like this

From How to setup tvp5151 video decoder

How to use EEPROM

Basic

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

Know more

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

From How to use EEPROM

How to use CAN bus

You have to connect the two boards like this:

IGEPv2 1             IGEPv2 2
.---                 .---
| 1 |-X            X-| 1 |
| 2 |------------------| 2 | 
| 3 |------------------| 3 |
| 4 |------------------| 4 |
.---                 .---

If this is your first time accessing CAN bus, check J702 jumper is not connected before follow this tutorial. If you don't have this jumper, don't worry because its function is only for testing.

Now you can set up the interface (on all boards when using multiple IGEPv2 EXPANSION connected to a CAN network simultaneously):

/bin/ip link set can0 up type can bitrate 125000

If you want to receive CAN data, use:

candump can0

If you want to send CAN data, use:

cansend can0 -i 0x123 0xaa 0xbb 0xcc 0xdd

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

can0  123  [4] aa bb cc dd

Switch roles and try it again

From How to use CAN bus

You have successfully completed this chapter of the guide.

If you have any question, don't ask to ask at the IGEP Community Forum or the IGEP Community Chat

IGEPv2 EXPANSION Tutorial Guides

1/3 - Getting started with IGEPv2 EXPANSION 2/3 - What can I do with IGEPv2 EXPANSION 3/3 - Start developing with IGEPv2 EXPANSION IGEPv2 EXPANSION Product Page IGEPv2 EXPANSION Hardware manual