If you accidentally flash a wrong u-boot, you can boot up through the USB cable and reflash it with a working one. Sometimes, you may want to boot uBoot from SD card. Follow these steps to do so:. Do not forget to rename uboot and the name of the card reader drive letter located at the end of the command e. Use this command in Windows command prompt:. Now you have two options. To prepare an SD card, download cfimager.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 7 years, 8 months ago. Active 7 years, 8 months ago. Viewed 11k times. Does anyone know how this can be done? The correct answer depends on the version of U-Boot that you are using, whether the kernel can see the flash at all, and if mtd-utils are installed on the root filesystem. For example, if U-Boot loads the root filesystem from flash into a RAMdisk and the kernel does not have the flash partitioning information, either because it is not compiled in or is not in the dtb or is not provided on the kernel commandline, then you can't copy the flash from userspace, and possibly not from U-Boot.
Is there any tool that can run this command and download the complete nand flash even if slow? It can be called as follows sf read [addr] [offset] [len] So for your case, reading romfs would look like this: sf probe 0; sf read 0x 0x 0x Then you can transfer the file to tftp server: tftp 0x romfs.
I am wondering, is this actually working? Which U-Boot version? If you mean Busybox, then which vers? Busybox tftp have no such command syntax. It does! Version "U-Boot Serge This depends on u-boot implementation on a particular device. In all CPE modems and routers I used, u-boot supported only one-way file transfer, from external tftp into device memory.
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