[yocto] Bare metal Ultibo with openjjpeg with TFTP Server & Remote shell

Edward Vidal develone at sbcglobal.net
Tue Aug 29 15:17:15 PDT 2017


Hello All,This should work on either a RPi2B or RPi3BThe micro sd-card that I used was 8GB with 1 partition.A 4GB micro sd-card should work just as well.
Device     Boot Start     End Sectors Size Id Type/dev/sda1  *     2048 8390655 8388608   4G  b W95 FAT32
https://github.com/develone/jpeg-2000-test/tree/master/bare-metal/openjp/sd-card
    these 5 files are needed on micro sd-card    bootcode.bin    fixup.dat    MyBitmap.bmp This is a 2048 x 2048 lena in RGB format    start.elf    kernel7.img This file was created with     Free Pascal Compiler FPC.
A monitor needs to be connected on the HDMI connector to display the bootprocess. The RJ-45 connector needs to be connected to network that providesDHCP and NTP services. If the RJ-45 is not connected it will take a bitlonger to boot and the TFTP & Remote shell will not be available.
This will require the transfer of files with USB apdater. 
         This is the latest version with a compression ratio of 125:1    12583034 --> 100660    This will create the file test.j2k    tftp xx.xx.xx.xx    binary    get test.j2k    this md5sum should be    c38b036fc5dbd84082f9490deb45c59e  test.j2k    running the test_tile_decoder     ~/t_ultibo/build/bin/test_tile_decoder 0 0 2048 2048 test.j2k    create test_wr.bmp    https://github.com/develone/jpeg-2000-test/tree/master/bare-metal/openjp/decomp-sd-card        Adding the files kernel7.img & t_1024_125r.j2k    to the sd-card.    The file t_1024_125r.j2k on Raspbian    pi at raspberrypi3:~/t_ultibo/build/bin $ "./opj_compress -r 125 -i    ~/jpeg-2000-test/bare-metal/LibC/lena_rgb_1024.bmp -o t_1024_125r.j2k"    When rebooted the display will appear like 1024_1024.jpg    The file test_wr.bmp will be created on Ultibo RPi    Let me know if you have any questions.  I look forward to hearing your comments on this.I have tested with a compression of 400:1 which further reduces the image transfer to about a 0.1 sec. Edward Vidal Jr. e-mail develone at sbcglobal.net 915-595-1613
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