U-boot boot menu and installing to NAND flash

[robbins (Nate Robbins)]

Booting my BPI-R4 with serial connected shows me this Uboot boot menu: Clicking “Startup system” boots pre-installed OpenWRT - I’m not sure where this image is installed.

Can I install an image to NAND from the booted Linux environment without an SD card?

Secondly, this post BPI-R4 install nand/emmc from serial console [solved] - #6 by poet_gusty shows an OpenWRT-specific Uboot. Where is the source for this, and how can I compile and flash it with serial?

From what I can tell the current U-Boot is the MTK U-Boot, and OpenWRT has patches on top of that?

[hyf (hyf9929)]

These two links might help you.git.openwrt.org Git - openwrt/openwrt.git/commit

[hyf (hyf9929)]

[BPI-R3 mini] Install OpenWRT on BPI R3-mini (my way and issue)

II followed all these steps for eMMC. nstallation instructions for eMMC ---------------------------------- 0. Set boot switch to boot from SPI-NAND (assuming stock rom or immortalwrt running there). 1. Write GPT partition table to eMMC Move openwrt-mediatek-filogic-bananapi_bpi-r3-mini-emmc-gpt.bin to the device /tmp using scp and write it to /dev/mmcblk0: dd if=/tmp/openwrt-*-r3-mini-emmc-gpt.bin of=/dev/mmcblk0 2. Reboot (to reload partition table) 3. Write bootloader and OpenWrt…