Revision as of 13:48, 29 August 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 such add support to IGEPv2 Expansion, control some peripherals, etc.

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:

• Log into IGEPv2 (via SSH, as shown in the previous chapter), and run the following commands:

ssh root@192.168.5.1 
mkdir /tmp/temp
mount -t jffs2 /dev/mtdblock1 /tmp/temp 
vi /tmp/temp/igep.ini 

• In Seiko screen add the following line:

omapdss.def_disp=lcd-70

• In Powertip screen add the following line:

omapdss.def_disp=lcd-43

• Save changes and reboot your IGEP Device to finish it.
  

How to use Telit Modem

(from How to use Telit Modem)

Telit modem is not supported by default in IGEPv2 Expansion and IGEP Berlin.

Configure

Configure this adding following kernel cmdline parameter

buddy.modem=yes 

Power up

• Power up the modem using the next commands:

IGEPv2 Expansion:

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 SIM card reader , is blinking now), you can interact with it via UART 2.

IGEP BERLIN:

echo 0 > /sys/class/gpio/gpio145/value
echo 1 > /sys/class/gpio/gpio163/value
sleep 1
echo 0 > /sys/class/gpio/gpio163/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.
  

How to use TVP5151 Video Decoder

(from How to setup 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

How to use EEPROM

(from How to use EEPROM) Basic

The IGEP expansion boards (except IGEP New York) provides an AT24C01B serial EEPROM memory which is connected to the OMAP via I2C (register 50).

Use i2c-tools to manage it:

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

Know more

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

How to use CAN bus

(from 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

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