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   1 * todo
   2   * add hostname and user in image type configuration
   3   * mdns avahi zeroconf bonjour not work? maybe wrong hostname
   4     * confirm that the only real problem was incorrect user and hostname
   5     * maybe http://elinux.org/RPi_Advanced_Setup search 'avahi'
   6     * also https://stackoverflow.com/questions/10537816/cannot-connect-to-beaglebone-local
   7   * set time on beagleboard based on host system time
   8   * set timezone on beagleboard based on host system timezone
   9   * get network up and running, share network through host system
  10     * do this during bbb boot
  11   * make a ~/bin dir, add it to path
  12     * add full-update.bash to ~/bin
  13   * initial setup on beaglebone should do
  14     * sudo aptitude install -y v4l-utils # for v4l2-ctl
  15     * sudo aptitude install pkg-config # for compiling
  16     * for opencv:
  17       * sudo aptitude install -y libopencv-dev
  18       * check whether libopencv-dev is the only package necessary
  19   * add ssh key to bbb image to make sshing easier
  20 ** trying to compile grabber.c from derek molloy
  21 *** problem
  22 **** what i did
  23 gcc -O2 -Wall `pkg-config --cflags --libs libv4l2` grabber.c -o grabber
  24
  25 **** what i expected
  26 compilation finishes and i can run grabber
  27
  28 **** what actually happened
  29 Package libv4l2 was not found in the pkg-config search path.
  30
  31 **** potential solution
  32     sudo aptitude install -y libv4l-dev
  33
  34 ***** did it work?
  35       * retrying compile
  36       * compile finished, created grabber!
  37
  38 ** another problem, getting image from camera failed
  39 *** problem
  40 **** what i did
  41 after compiling grabber, tried to run it
  42
  43 **** what i expected
  44 grab images and maybe there would be a picture in the current directory
  45
  46 **** what actually happened
  47 grabber ran for a bit and output the following:
  48
  49 "Warning: driver is sending image at 1280x720"
  50
  51 after waiting for a bit, killed grabber with C-c. no picture in the
  52 current directory
  53
  54 **** possible solution
  55      * read source of grabber.c and look for anything out of
  56       ordinary.
  57      * saw that frame size was hard coded to 1920x1080
  58      * redid code to 640x480. recompiled the code
  59      * ran it, got no terminal output
  60      * killed it with C-c after a bit
  61      * saw grabber000.ppm
  62
  63 * TODO test out all cameras
  64 ** TODO test out c920 logitech hd pro webcam
  65 *** TODO test out c920 on laptop
  66     * testing with laptop!
  67     * cheese shows video feed from device
  68     * when run streamer -c /dev/video1 -o foobar.ppm, next image from
  69       opencv-hello-world is messed up
  70       * when run multiple times in a row, opencv-hello-world gets correct
  71         image second time
  72 *** TODO test out c920 on bbb
  73 **** TODO test with debian 8.3 image
  74      unable to connect via debian@arm.local or ping 192.168.7.2
  75 **** TODO test with debian 8.2 image
  76      * able to connect with debian@arm.local!
  77      * run full-update.bash
  78      * got it working by adding usbcore.autosuspend=-1 to cmdline in uEnv.txt
  79        * still need to throw away first image
  80      * trying kernel linux-{image,headers}-4.4.1-bone5
  81 *** TODO test out c920 on bbg
  82 **** TODO test with debian 8.3 image
  83      unable to connect via debian@arm.local or ping 192.168.7.2
  84 **** TODO test with debian 8.2 image
  85 ** tested thinkpenguin basic webcam on bbg
  86 *** /boot/uEnv.txt cmdline usbcore.autosuspend=-1
  87      tried with and without this option.  always select timeout
  88 *** reloading uvcvideo with options
  89      * modprobe -r uvcvideo
  90      * modprobe uvcvideo nodrop=1 timeout=5000
  91      * did not get 'select timeout' but images were solid green with a
  92        thin line at the top of real image
  93 ** TODO recompile kernel with CONFIG_MUSB_PIO_ONLY=y
  94    might solve usb problems
  95    "This happens due to the not well working USB DMA mode in the
  96     Beaglebone. I disabled the DMA mode in the kernel (Cameras use
  97     USB ISO mode) and it worked well so far."
  98 ** test c525 on bbg
  99 *** does not work on bbg
 100    light turns on, but get select timeout
 101    did not do uEnv.txt cmdline or reload uvcvideo mod
 102 *** works fine on laptop
 103 * TODO make sure license doesn't say "GNU Affero Emacs is distributed ..."
 104 * doing
 105   * maybe just go with debian 8.2
 106   * systematically try all the images on all the boards
 107     * debian 8.3 lxde, debian 7.9 lxde, debian 7.9 console,
 108       debian 8.2 console 2016-01-14
 109     * BBB-eMMC-flasher-debian-7.9-console-armhf-2015-11-03-2gb.img
 110       * flashes BBB and BBG
 111       * leaves the board accessible via 192.168.7.2
 112       * unable to get to board with beaglebone.local
 113     * debian 8.2 console 2016-01-14
 114       * username:debian
 115       * pw:temppwd
 116       * BBG
 117         * flashes
 118         * boots after flash
 119         * no beaglebone.local
 120         * yes debian@192.168.7.2
 121       * BBB
 122         * flashes
 123         * boots after flash
 124         * no beaglebone.local
 125         * yes debian@192.168.7.2
 126     * debian 8.3 lxde
 127       * username:root
 128       * pw:
 129       * BBG
 130         * flashes
 131         * boots after flash
 132         * yes beaglebone.local
 133         * yes 192.168.7.2
 134       * BBB
 135         * flashes
 136         * boots after flash via power button, no need to pull usb cable
 137         * no 192.168.7.2
 138         * no beaglebone.local
 139 * done