What can I do with IGEPv2 EXPANSION
From IGEP - ISEE Wiki
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Contents
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 serial console
board.ei485=no
You need a Null-Modem DB9 male-make serial cable. Connect the cable between the target board and your PC.
Open the serial port on your PC using your preferred serial communications program (minicom) and configure the port as follows:
- 115200
- 8N1
- no flow control (either software or hardware)
On the target board open a serial port as follows:
$ microcom -s 115200 /dev/ttyS0
Now when you write a character in you PC serial port, the character should appear in the target board.
A detailed guide on how use UARTS can be found by following this link: How to use UARTs
How to use Telit Modem
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| GSM-GPRS antenna (highly recommended) | SIM card reader |
IGEPv2 Expansion integrates a GSM/GPRS modem to make phone calls or to send SMS or to write and read data from it, etc. Telit modem is not supported by default in IGEPv2 Expansion. 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
Configure TVP5151
- Plug some peripheral with video composite output in J501 rca connector, see the image for more details.
- 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
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From How to setup tvp5151 video decoder
How to use EEPROM
IGEPv2 Expansion includes a serial EEPROM, provides 1KB of user data storage. EEPROM is connected through I2C2 of OMAP3 processor at address 0x50.
The following example 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
From How to use EEPROM
How to use CAN bus
You have to connect the two boards like this:
IGEPv2 Exp 1 IGEPv2 Exp 2 .--- .--- | 1 |-X X-| 1 | VDD_CAN: Supply Voltage (+5V DC) | 2 |------------------| 2 | CANL: CAN Low-Level Voltage I/O | 3 |------------------| 3 | GND : Ground | 4 |------------------| 4 | CANH : CAN High-Level Voltage I/O .--- .---
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
How to use VGA connector
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IGEPv2 Expansion integrates a VGA connector, the output VGA signal is equal to HDMI connector. Plug a monitor with VGA input.
You have successfully completed this chapter of the guide.
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If you have any question, don't ask to ask at the IGEP Community Forum or the IGEP Community Chat | 
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