I’ve been poking around Toradex’s Artifactory and documetation to find an example uuu file that actually flashes
the bootloader to the boot partition and a disk image (ie .wic, that is, including partition table and several partitions)
to the eMMC on a Verdin IMX8MPlus.
All I could find so far are examples of how to load u-boot/imxboot, kernel, etc into RAM and run it that are in some of the builds in the recovery/ subdir.
But I already have that working, now looking at how to flash my own.
And… no, I do NOT want to use the Toradex Easy Installer.
I’ve seen examples that use something like SDP*: write -f <image> -offset 0x??? for the bootloader.
Does that write to the boot0 and boot1 eMMC partitions, just one of them?
I’ve also seen examples using u-boot via fastboot to (apparently) flash the bootloader…
How do I write the disk image?
UUU isn’t particularly well documented, which makes this process more difficult to figure out at first.
1 Like
I ended up figuring it out myself by cobbling together pieces from various sources and experimentation.
My .uuu script looks something like this:
uuu_version 1.4.127
# Load bootloader image into RAM over SDP
SDPS: boot -f imx-boot-<MACHINE>-sd.bin-flash_evk_emmc_fastboot
SDPS: done
# Setup uboot environment for flashing eMMC [must have emmc_dev set in (default) environment, for Verdin IMX8MP, this is set to 2]
FB: ucmd setenv fastboot_dev mmc
FB: ucmd setenv mmcdev ${emmc_dev}
FB: ucmd mmc dev ${emmc_dev}
# Use FastBoot to send the bootloader image over SDP, and make FastBoot flash it into the 'bootloader' HW partition of ${fastboot_dev}
FB: flash bootloader imx-boot-<MACHINE>-sd.bin-flash_evk_emmc_fastboot
# Determine if BOOT_ACKs are desired (appears that BOOT_ACK should be used for eMMC fast boot) [I have emmc_ack set to 1 in (default) environment]
FB: ucmd if env exists emmc_ack; then ; else setenv emmc_ack 0; fi;
# Flash .wic image to main area of eMMC [.wic is a sparse, whole disk image containing the partition table and partition data, generated by bitbake based on layout in a .wks file]
FB: flash -raw2sparse all my-factory-image-emmc-<MACHINE>.wic
# Done flashing eMMC
FB: done
as mentioned in the commented lines above, you have to set emmc_dev (2 for Verdin IMX8MP) and emmc_ack (turned on, ie. 1) in your default environment. I’ve added it to CONFIG_EXTRA_ENV_SETTINGS in my board config header in include/configs/
Hi @mbessler,
is it working for you?
are you able to flash custom uboot into emmc and boot from there.
do you have any debug logs it would very helpful.
Thanks & Regards,
Musthafa av
@Musthafa yes, it is working. I don’t have debug logs. Where is it failing for you?
Hi,
it is booting the imx-boot image, but looks like the imx-boot image and wic image is not flashing. please find the attched logs.
U-Boot SPL 2020.04-5.7.1-devel+git.35d43dd2f823 (Nov 30 2022 - 07:55:49 +0000)
DDRINFO: start DRAM init
DDRINFO: DRAM rate 4000MTS
Training FAILED
Quad die, dual rank failed, attempting dual die, single rank configuration.
DDRINFO: start DRAM init
DDRINFO: DRAM rate 4000MTS
DDRINFO:ddrphy calibration done
DDRINFO: ddrmix config done
Normal Boot
Trying to boot from BOOTROM
Find FIT header 0x4803a7a0, size 969
Need continue download 1024
Download 841072, total fit 842192
NOTICE: BL31: v2.2(release):toradex_imx_5.4.70_2.3.0-g2fa8c6349e
NOTICE: BL31: Built : 12:30:42, May 17 2022
U-Boot 2020.04-5.7.1-devel+git.35d43dd2f823 (Nov 30 2022 - 07:55:49 +0000)
CPU: i.MX8MP[8] rev1.1 1800 MHz (running at 1200 MHz)
CPU: Commercial temperature grade (0C to 95C) at 34C
Reset cause: POR
DRAM: 2 GiB
MMC: FSL_SDHC: 1, FSL_SDHC: 2
In: serial
Out: serial
Err: serial
Model: Toradex Verdin iMX8M Plus Quad 2GB V1.0B, Serial# 06849286
Carrier: Toradex Verdin Development Board V1.1A, Serial# 10807567
BuildInfo:
- ATF 2fa8c63
- U-Boot 2020.04-5.7.1-devel+git.35d43dd2f823
Setting variant to nonwifi
Detect USB boot. Will enter fastboot mode!
Net: eth1: ethernet@30be0000, eth0: ethernet@30bf0000 [PRIME]
Fastboot: Normal
Boot from USB for mfgtools
*** Warning - Use default environment for mfgtools
, using default environment
Run bootcmd_mfg: fastboot 0
Hit any key to stop autoboot: 0
uuu.auto (1.1 KB)
please find the scripts i have used
emmc_dev set to 2 and emmc_ack is set to 1 in CONFIG_EXTRA_ENV_SETTINGS and build is done
