[LINUX] Until OSD335X runs U-boot on a custom board (memo)
2020/07/25 First description
Synopsis so far
I bought OSD3358-512M-BCB. https://www.mouser.jp/ProductDetail/415-OSD3358-512M-BCB
I made a board. https://twitter.com/nonNoise/status/1278465569499447298?s=20
Implemented. https://www.youtube.com/watch?v=acrJceh3bkU
Power on
It worked.
A large amount of CCCCCCC ... flows from the serial (UART0).
The serial setting is *Baud rate: 115,200 *Data bits: 8 *Parity: None *Stop bits: 1 *Flow control: None
U-boot binary data preparation
Apparently it needs to be compiled.
Compile in Ubuntu environment. Ubuntu environment was newly prepared with Vertual Box.
ARM GCC environment setup
wget -c https://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/arm-linux-gnueabihf/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf.tar.xz
export CC=[PWD]/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
- For [PWD], substitute the directory address with the PWD command.
U-Boot compilation
git clone https://github.com/u-boot/u-boot cd u-boot/ git checkout v2018.01 -b tmp
- I made it as a reference, so it's kind of old. I plan to update it somewhere.
Patch U-Boot
wget -c https://rcn-ee.com/repos/git/u-boot-patches/v2018.01/0001-am335x_evm-uEnv.txt-bootz-n-fixes.patch wget -c https://rcn-ee.com/repos/git/u-boot-patches/v2018.01/0002-U-Boot-BeagleBone-Cape-Manager.patch wget -c https://raw.githubusercontent.com/RobertCNelson/Bootloader-Builder/master/patches/v2018.03-rc1/0002-NFM-Production-eeprom-assume-device-is-BeagleBone-Bl.patch
patch -p1 < 0001-am335x_evm-uEnv.txt-bootz-n-fixes.patch patch -p1 < 0002-U-Boot-BeagleBone-Cape-Manager.patch patch -p1 < 0002-NFM-Production-eeprom-assume-device-is-BeagleBone-Bl.patch
- There is such a mechanism. You can see the shadow of BeagleBone. I want to customize.
Make U-Boot.
export CC=[PWD]/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
- For [PWD], substitute the directory address with the PWD command.
make ARCH=arm CROSS_COMPILE=
Hand over the necessary files to Windows
ARM U-Boot requires two types of files u-boot-spl.bin (for first stage boot) and u-boot.img (for next stage boot)
u-boot-spl.bin will be in u-boot / spl.
Write with TeraTerm
Foreigners also use TeraTerm.
Check that CCC CC ..... and C are flowing in the terminal.
File-> Transfer-> XMODEM-> Send Select u-boot-spl.bin Check 1K at the bottom left Transferred.
File-> Transfer-> YMODEM-> Send
Select u-boot.img
Transferred.
At first, it will be 0% for a while, but be patient (about 1 minute) until the bar moves.
safely? to start.
So what?
However, in this state, the two U-Boot programs are still expanded in RAM, so when you reset or power cycle, CCCC .... is displayed again. This is the best way to debug U-Boot.
Looking at the U-Boot log, it complains that the EEPROM is an error or that there is no USB or Ethernet. It can't be left as it is, so it seems that U-Boot custom is needed. For the time being, I just chose the procedure to write U-Boot.
The destination seems to be long. (I'm looking forward to it) Fufufu.
References
https://octavosystems.com/forums/topic/osd3358-boot/
Real memo (1)
I've dealt with it because I got an error, but I'll leave it just in case.
bad value (‘armv5’) for ‘-march=’ switch
Error with make ARCH = arm CROSS_COMPILE = $ {CC} when this article is correct or when I try to compile again
It seems that export was cleared by restarting Ubuntu. (Hey ~) So before compiling export CC=[PWD]/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- Changed the article to write again.
Real memo (2)
When writing U-Boot serially, X-MODEM and Y-MODEM came out, and I wondered why, so I looked it up. https://ja.wikipedia.org/wiki/XMODEM https://ja.wikipedia.org/wiki/YMODEM I didn't know (I'm sorry I'm sorry) TeraTerm is convenient and easy to use, but I have trouble when I want to automate it, so I searched for a library in Python. https://pythonhosted.org/xmodem/ https://github.com/alexwoo1900/ymodem I see?
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