Video Unit Test
The BSP provides a package that allows testing of several i.MX 31 peripherals on the PDK. The name of this package is 'imx-test'.
The name of the package may vary according to SDK release, at the time of the writing SDK 1.4 was used, on SDK 1.2 the name of a similar package was 'mxc-misc'
For more information on the imx-test package refer to the SDK 1.4 manual, imx31_Linux_RM.pdf, chapter 49 - Unit Tests. This file is available on BSP tarball
Testing
To test the image sensor and the display on the PDK follow the steps below:
- Enable imx-test and util-linux packages:
$ ./ltib -c
- Once "ltib" finishes boot the system. On the target board:
$ modprobe mxc_v4l2_capture
- Check if /dev/video0 was created
$ ll /dev/video* lrwxrwxrwx 1 root root 6 Jan 1 20:47 /dev/video -> video0 crw-rw---- 1 root root 81, 0 Jan 1 20:47 /dev/video0 crw-rw---- 1 root root 81, 16 Jan 1 20:46 /dev/video16
- Now run the unit tests:
$./mxc_v4l2_overlay.out -iw 640 -ih 480 -ow 480 -oh 640 -r 4 -fr 30 -t 10
- capture images with the sensor and display on the LCD
$./mxc_v4l2_capture.out -w 640 -h 480 -r 0 -c 150 -fr 30 test3.yuv
- capture images and save on /unit-tests/test3.yuv
$./mxc_v4l2_output.out -iw 640 -ih 480 -ow 480 -oh 640 -d 4 -fr 60 test3.yuv
- capture images and save on /unit-tests/test3.yuv
For usage syntax type: command -help. ./mxc_v4l2_output.out -help
Source Code
If you want to check the source code, on the host machine "ltib" install path type:
$./ltib -m prep -p imx-tests
Then, go to <ltib install path>/rpm/BUILD/imx-test-2.3.2/test/mxc_v4l2_test
