What can I do with IGEPv2 EXPANSION

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Revision as of 19:15, 5 September 2012 by Pau (talk | contribs) (How to use TFT and Touchscreen)

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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 scrren, 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

(from 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.

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>


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


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.


Continue this tutorial guide: 3/3 - Start developing under IGEP Technology
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