Overview The document describes the procedure to measure the memory to memory copy performance by using SDMA on i.MX6Q. Materials i.MX6Q Sabre SD board L3.0.35_4.1.0_130816 BSP Procedure Install BSP and build kernel Extract imx unit test source: ./ltib -p imx-test -m prep Apply attached patch to sdma memcopy code cd ltib/rpm/BUILD/imx-test-3.0.35-4.1.0 patch -p1 -i LTIB_4.1.0_sdma_m2m_test.patch Build imx unit test ./ltib -p imx-test -f Copy kernel and rootfs to SD Card. Boot kernel and login Insert the kernel module for SDMA memory copy test: insmod /lib/modules/XXX/test/mxc_sdma_memcopy_test.ko Start SDMA memory copy test /unit_tests/mxc_sdma_test.out Result root@freescale ~$ insmod /lib/modules/3.0.35-2666-gbdde708-g1c42f8b/test/mxc_sdma_memcopy_test.ko SDMA test major number = 248 SDMA test Driver Module loaded root@freescale ~$ /unit_tests/mxc_sdma_test.out in dma_m2m_callback 65532byte / 0.003382sec buffer 1 copy passed! root@freescale ~$ /unit_tests/mxc_sdma_test.out in dma_m2m_callback 65532byte / 0.003367sec buffer 1 copy passed! root@freescale ~$ /unit_tests/mxc_sdma_test.out in dma_m2m_callback 65532byte / 0.003364sec buffer 1 copy passed! In summary, > 19Mbyte/sec

Note that this document only applies for REV2 of the SCM QWKS board Refer to the attached presentation to check how the OV5640 camera can be connected to the QWKS rev2 with a retrofit of the OV5640 camera set as in the image below Enjoy!!!

How to connect i.MX51 and Ubuntu using USB cable: i.MX51 Side Plug in USB cable. getprop debug.adb.usb - Shows that debug.adb.usb are not set by default setprop persist.service.adb.enable 0 -> disable adb setprop debug.adb.usb 1 - adb will be through USB (for Ethernet, use setprop debug.adb.usb 0) setprop persist.service.adb.enable 1 -> enable adb Example: # getprop debug.adb.usb  # # # setprop persist.service.adb.enable 0 disabling adb # adb_release android_usb gadget: high speed config #1: android setprop debug.adb.usb 1 # # setprop persist.service.adb.enable 1 enabling adb # adb_open adb_release adb_open android_usb gadget: high speed config #1: android # Ubuntu Side On Ubuntu side, the most important tip is regarding permission. ADB server MUST be started with root right. Example of right mistake: $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb devices List of devices attached ????????????    no permissions  $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb shell error: insufficient permissions for device How to proceed to get permission: $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb kill-server $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb start-server * daemon not running. starting it now * * daemon started successfully * $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb devices List of devices attached 0123456789ABCDEF    device  $ sudo <AND_SDK_DIR>/android-sdk-linux_86/tools/adb shell ADB over Ethernet/Wi-Fi To make ADB work in i.MX51 using TCP: In your host machine: - Install Android SDK - export ADBHOST=BOARD_IP (setenv ADBHOST=xxx.xxx.xxx.xxx) - adb kill-server In your board: - make sure that ro.secure property is *not* set when the adbd daemon is launched, so edit the file default.prop - make sure that /dev/android_adb or /dev/android do *not* exist - stop adbd - start adbd Now you will be able to list the device: hamilton@saygon:/opt/work/androidsdk/android-sdk-linux_86/tools$ ./adb kill-server hamilton@saygon:/opt/work/androidsdk/android-sdk-linux_86/tools$ ./adb devices * daemon not running. starting it now * * daemon started successfully * List of devices attached emulator-5554   device

The Linux L4.1.15_2.0.3 Patch for i.MX 6ULL@900MHz Release is now available on www.nxp.com. BSP Updates and Releases -> Linux -> Linux 4.1.15_2.0.3 Patch.   Files available: # Name Description 1 L4.1.15_2.0.3_6ULL_patch_images.tar.gz i.MX 6ULL-EVK@900MHz Linux Binary Demo Files   Information of release, see: README: http://git.freescale.com/git/cgit.cgi/imx/fsl-arm-yocto-bsp.git/tree/README?h=imx-4.1-krogoth ChangeLog: http://git.freescale.com/git/cgit.cgi/imx/fsl-arm-yocto-bsp.git/tree/ChangeLog?h=imx-4.1-krogoth

i.MX 35 PDK board has 256 MB of RAM, due to a bug in Redboot bootloader compiled for the board effectively there is only 128 MB available. This procedure fixes this bug to be able to use 256 MB of RAM. Redboot supporting 256 MB of RAM 1. Download the attached Redboot256.bin file. 2. Flash the new redboot image instead of the old one using one of the methods: All Boards Updating RedBoot Through RedBoot