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Add loading fw from SD card

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Paul Philippov 2022-07-15 06:10:22 -04:00 committed by GitHub
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en/help-uboot.md
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@ -157,6 +157,41 @@ uploading via serial connection. At 115200 bps. Slow, very slow.
After the file is uploaded, you can do the usual magic. Either boot from the memory After the file is uploaded, you can do the usual magic. Either boot from the memory
image right away using `bootm`, or write it into the flash memory. image right away using `bootm`, or write it into the flash memory.
### Reading binary image from SD card.
If your camera supports SD card and you have `fatload` command in bootloader, then
you can read firmware binary files from an SD card.
First, prepage the card: format it into FAT filesystem and place bootloader, kernel,
and rootsf binary files there. Insert the card in camera and boot into bootloader
console. Check that you have access to the card.
```
mmc rescan
```
Then unlock access to flash memory and start writing content of the files from the card
into the flash memory.
NB! Please note that load address and names of files used in this example not necessarily
match those for your particular camera. Consult documentation, or seek help on [our Telegram channel][telegram].
```
sf probe 0
mw.b 0x80600000 ff 1000000
sf erase 0x0 0x50000
fatload mmc 0:1 0x80600000 u-boot-with-spl.bin
sf write 0x80600000 0x0 ${filesize}
mw.b 0x80600000 ff 1000000
sf erase 0x50000 0x200000
fatload mmc 0:1 0x80600000 uimage.t31
sf write 0x80600000 0x50000 ${filesize}
mw.b 0x80600000 ff 1000000
sf erase 0x250000 0x500000
fatload mmc 0:1 0x80600000 rootfs.squashfs.t31
sf write 0x80600000 0x250000 ${filesize}
```
### Bypassing password-protected bootloader. ### Bypassing password-protected bootloader.
@ -175,3 +210,6 @@ for Xiongmai cameras the bootloader password protection started popping up
somewhere around July 2021, hence you need a firmware for your camera from an somewhere around July 2021, hence you need a firmware for your camera from an
earlier date. After you successfully downgrade your camera to a password-free earlier date. After you successfully downgrade your camera to a password-free
bootloader, you could install the OpenIPC firmware in a regular way. bootloader, you could install the OpenIPC firmware in a regular way.
[telegram]: https://t.me/OpenIPC