What can I do with IGEP0022
From IGEP - ISEE Wiki
If you have successfully completed the getting started guide for IGEP0022, you can follow this first introduction about what can you do with this expansion board:
Contents
How to use Serial communication
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How to get 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.
How to use TFT and Touchscreen
Seiko 7.0 inch WVGA (800 x RGB x 480) TFT:
Add the following line to igep.ini
omapdss.def_disp=lcd-70
Powertip 4.3 inch (480 x RGB x 272) TFT:
Add the following line to igep.ini
omapdss.def_disp=lcd-43
To configure the touchscreen, add "Configured Touchscreen" in "ServerLayout" section and remove "Configured Mouse" in /etc/X11/xorg.conf
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
How to use Telit Modem
The IGEP0022 expansion board provides a Telit GE865 GSM/GPRS modem which is connected to the OMAP via some GPIO pins and UART 2.
Here you have the official manuals from the manufacturer's webpage:
Here there are a few instructions in order to introduce the Telit modem.
If this is your first time accessing Telit Modem, check J402 and J403 jumpers are not connected before follow this tutorial. If you don't have these jumpers, don't worry because their functions are only for testing.
Insert a valid SIM card to the SIM card reader of your IGEP0022 expansion board.
Now, you must add the following line at the kernel file (igep.ini) in order to enable GE865 support :
buddy.modem=yes
Now its time to power up your modem. You may read the Official manufacturer Hardware User Guide, where there is a complete explanation about the sequence.
In IGEP0022, the modem is connected to 3 GPIO pins from the OMAP, which are: <omap_pin_name (modem_function)>
- GPIO_140 (Reset)
- GPIO_141 (On_Off)
- GPIO_156 (PWRMON)
You can power up your modem using the following sequence:
(Note: the following instructions are correctly 'toggled' do to pull-up resistors. Refer to schematics at the Official IGEP0022 Hardware Manual from ISEE)
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, 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/ttyS1
(Note: GE865 has auto baud rate detection, so you can use a different speed)
To check the modem status use the command::
at
Answer should be OK.
Note: correcting syntax with 'backspace' may cause error in a serial command if you are not writing the command at first take. Don't type <> when use the following commands
In order to use your GSM/GPRS you should connect the antenna as it is explained in the Getting Started with IGEP0022 article.
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.
(Note: 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.
Examples
If you successfully followed the the previous instructions, you are ready to test the GSM/GPRS modem. Here are some examples of simple commands:
You can check the complete list of AT commands at the Official manufacturer Software User Guide.
Test received signal strenght
Use the instruction:
at+csq
The answer should be: +CSQ: X,0. Where X is the signal strenght,for example 6 is poor and 15 is good. If the answer is +CSQ:99,99 you should be check the antenna
Making a phone call
Use the instruction:
atd <number_to_call>
Press any key to end call
Sending a SMS
First of all, you need to configure the SMS format type. Telit GE865 GSM/GPRS support PDU format and Text format. We use Text format. Type the following command:
AT+CMGF=1
There are so many ways in this modem to send a message. Here you have a simple example. Use the instruction:
at+cmgs="<destination_number>" > <insert_here_your_text_message>
When you are ready to send your message use Ctrl+Z to send it.
If you want to cancel or restart the message press ESC.
How to use TVP5151 Video Decoder
Requirements
- Have successfully connected the TFT Screen as explained at the Getting Started Guide or at the Official Hardware Reference Manual
- A camera or any device with PAL output video to RCA connector.
There are two modules that you will use that are not inserted into the kernel: iommu2 (tvp5151) and isp.
You have to load these kernel modules before start:
modprobe iommu2 modprobe omap3-isp
(Note: The first load order must be the iommu2 and then the omap3-isp)
Now, use the program media-ctl. This program is useful to configure the ISP. You can download it from here. Then you have to transfer it to your IGEP0022 (for example via SCP command).
Now you have to configure the ISP and TVP5151:
./media-ctl -r -l '"tvp5150 2-005c":0->"OMAP3 ISP CCDC":0[1], "OMAP3 ISP CCDC":1->"OMAP3 ISP CCDC output":0[1]'
Configure the video capture setup:
./media-ctl --set-format '"tvp5150 2-005c":0 [UYVY 720x628]'
Connect a video camera or any device with PAL output to the Composite Video RCA input connector of the IGEP0022.
Use gstreamer as live stream to capture video from your video source.
Now setup the gstreamer pipeline:
gst-launch-0.10 -v v4l2src device=/dev/video2 queue-size=1 ! video/x-raw-yuv,format=\(fourcc\)UYVY,width=720,height=628 ! omapfbsink
If everything was fine you will see the live video at the screen.
How to use 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
How to use CAN bus
Check J702 jumper is not connected before follow the tutorial.
The IGEP0022 expansion board provides a CAN interface using MCP2515.
Several tools are provided by socketCAN to use this controller:
- 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.
In order to test the CAN interface you can connect IGEP0022 to a CAN device or network or to another IGEP0022 board.
In the last case, you have to connect the two boards like this:
Board 1 Board 2 .--- --- | 1 |-X X-| 1 | | 2 |----------------| 2 | | 3 |----------------| 3 | | 4 |----------------| 4 | .--- ---
Now you can set up the interface (on all boards when using multiple IGEP0022 connected to a CAN network simultaneously):
/sbin/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 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 try it again
