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Introduction to U Boot? /Lack of fundamental understanding

dfgsdgdfgf

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dfgsdgdfgf

dfgsdgdfgf

Posted
Posted

I read a lot of U Boot documentation the last hours but I still fail at fundamental understanding, like:
 

- where can variables be set? boot.scr obviously, but there is also uEnv.txt boot.cmd armbianEnv.txt ... and in which order and precendence are they parsed? (If I set a variable in different files, which value will be used? first? last? ...)

- how is a change made persistent (saveenv does not work)

- Can sub-variables be changed, e.g. root in bootargs

 

what I am trying to achieve atm is to change the boot partion rootdev from p1 to p2. Even thou I think I patched the relevant files, printenv shows that bootargs and rootdev are still set to p1. Even if I set rootdev to ps (verified by printenv) running boot fails (and afterwards its set to p1 again).

I did not try to edit bootargs because I dont know how to do this without retyping the entire variable content (which is error-prone and annoying)

 

 

A lot of documentation is done on compiling/building, I basically want to now how to mange the "grub" part of u boot.

Would be nice if someone has a few hints or url(s) for me. Tahnk you.

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lanefu

lanefu

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Posted
3 hours ago, dfgsdgdfgf said:

I read a lot of U Boot documentation the last hours but I still fail at fundamental understanding, like:
 

- where can variables be set? boot.scr obviously, but there is also uEnv.txt boot.cmd armbianEnv.txt ... and in which order and precendence are they parsed? (If I set a variable in different files, which value will be used? first? last? ...)

- how is a change made persistent (saveenv does not work)

- Can sub-variables be changed, e.g. root in bootargs

 

what I am trying to achieve atm is to change the boot partion rootdev from p1 to p2. Even thou I think I patched the relevant files, printenv shows that bootargs and rootdev are still set to p1. Even if I set rootdev to ps (verified by printenv) running boot fails (and afterwards its set to p1 again).

I did not try to edit bootargs because I dont know how to do this without retyping the entire variable content (which is error-prone and annoying)

 

 

A lot of documentation is done on compiling/building, I basically want to now how to mange the "grub" part of u boot.

Would be nice if someone has a few hints or url(s) for me. Tahnk you.


its super confusing to say the least....    here's my best understanding..

 

1. If u-boot is running from SPI flash on the board (ex: espressobin).. then you're relying on the parameters stored in the flash.  saveenv is how that those parameters are updated in flash.   So first precedence here

2. If u-boot is being loaded from the sdcard.. then boot.scr is what is read first and "saveenv" wont be relevant.... boot.scr is generated via the mkimage command and typically using boot.cmd as the source

3. ArmbianEnv is loaded via an Armbian friendly boot.cmd.  It loads only a few values in that file and treats them as variables to be used within the rest of the purpose-made boot.cmd.  (see extraargs inside boot.cmd for a hint)

4. Modifying boot.cmd and then regenerating boot.scr will be the most staightforward way to make quick changes (see bottom of boot.cmd script own how to recreate)

5. Once you master above, you can probably take advantage to ArmbianEnv.txt to make changes so that the boot.scr file doesnt have to be created each time you make a change

 

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FRANK333

FRANK333

Posted
Posted

Hello igor,
I tried to modify ArmbianEnv.txt adding setenv rootdev "/dev/sda1 "to boot from hdd without SD , recompiled boot.cmd but it does not work yet.
I ask you you can boot completely from hdd (if you like) or I have to settle for boot on sd?
P.S. I opened a dedicated post for the problem https://forum.armbian.com/topic/11514-opzero-boot-from-external-usb20-drive-hdd-without-any-sd/

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Igor

Igor

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Posted
1 hour ago, FRANK333 said:

I tried to modify ArmbianEnv.txt adding setenv rootdev "/dev/sda1 "to boot from hdd without SD

 

If you boot from SPI (speaking from head, not sure) we search for boot.cmd on various devices, starting from ... I don't know. I was not doing much with booting from SPI and I am not aware of the defaults, but I am sure its possible to boot directly SPI -> SATA/USB.

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FRANK333

FRANK333

Posted
Posted

SPI -> SATA/USB boot is just what I'm trying to do.
 You can tell me (if it's not too complicated) how to do it or where to read a recent tutorial.
Below is all I could do.

Spoiler

U-Boot SPL 2019.04-armbian (Jul 06 2019 - 00:40:48 +0200)
DRAM: 512 MiB
Trying to boot from sunxi SPI
   
   
U-Boot 2019.04-armbian (Jul 06 2019 - 00:40:48 +0200) Allwinner Technology
   
CPU:   Allwinner H3 (SUN8I 1680)
Model: Xunlong Orange Pi Zero
DRAM:  512 MiB
MMC:   mmc@1c0f000: 0, mmc@1c10000: 1
Loading Environment from EXT4... MMC: no card present
In:    serial
Out:   serial
Err:   serial
Net:   phy interface0
eth0: ethernet@1c30000
starting USB...
USB0:   USB EHCI 1.00
USB1:   USB OHCI 1.0
USB2:   USB EHCI 1.00
USB3:   USB OHCI 1.0
USB4:   USB EHCI 1.00
USB5:   USB OHCI 1.0
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 1 for devices... 1 USB Device(s) found
scanning bus 2 for devices... 3 USB Device(s) found
scanning bus 3 for devices... 1 USB Device(s) found
scanning bus 4 for devices... 1 USB Device(s) found
scanning bus 5 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found
Autoboot in 1 seconds, press <Space> to stop
MMC: no card present
   
Device 0: Vendor: Maxtor 6 Rev: 0811 Prod: Y080L0
            Type: Hard Disk
            Capacity: 78167.2 MB = 76.3 GB (160086528 x 512)
... is now current device
Scanning usb 0:1...
Found U-Boot script /boot/boot.scr
data abort
pc : [<5ffa9612>]          lr : [<5ffa905d>]
reloc pc : [<4a02b612>]    lr : [<4a02b05d>]
sp : 5bf570e8  ip : 00000003     fp : 00000005
r10: 5bfbaf78  r9 : 5bf5dee0     r8 : 00000001
r7 : 5bf60e48  r6 : 5af56040     r5 : 5bf57110  r4 : 00000022
r3 : 0000005c  r2 : 5af560a3     r1 : 5bf60eb4  r0 : 5af5609f
Flags: nzCv  IRQs off  FIQs off  Mode SVC_32
Code: 4630fd7f 81f0e8bd e7d84606 bf082b2f (f822235c)
Resetting CPU ...

resetting ...

U-Boot SPL 2019.04-armbian (Jul 06 2019 - 00:40:48 +0200)

=> printenv
arch=arm
baudrate=115200
board=sunxi
board_name=sunxi
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_efi_binary=if fdt addr ${fdt_addr_r}; then bootefi bootmgr ${fdt_addr_r};else bootefi bootmgr ${fdtcontroladdr};fi;load ${devtype} ${devnum}:${distro_bootpart}
${kernel_addr_r} efi/boot/bootarm.efi; if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r};else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi
boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}${boot_syslinux_conf}
boot_net_usb_start=usb start
boot_prefixes=/ /boot/  
boot_script_dhcp=boot.scr.uimg
boot_scripts=boot.scr.uimg boot.scr
boot_syslinux_conf=extlinux/extlinux.conf
boot_targets=fel mmc0 usb0 pxe dhcp
bootcmd=run distro_bootcmd
bootcmd_dhcp=run boot_net_usb_start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}"
-a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXECli
ent:Arch:00010:UNDI:003000;setenv bootp_arch 0xa;if dhcp ${kernel_addr_r}; then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};if fdt addr ${fdt_addr_r}; then bootefi ${k
ernel_addr_r} ${fdt_addr_r}; else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi;fi;setenv bootp_vci ${efi_old_vci};setenv bootp_arch ${efi_old_arch};setenv efi_fdtfi
le;setenv efi_old_arch;setenv efi_old_vci;
bootcmd_fel=if test -n ${fel_booted} && test -n ${fel_scriptaddr}; then echo '(FEL boot)'; source ${fel_scriptaddr}; fi
bootcmd_mmc0=devnum=0; run mmc_boot
bootcmd_pxe=run boot_net_usb_start; dhcp; if pxe get; then pxe boot; fi
bootcmd_usb0=devnum=0; run usb_boot
bootdelay=1
bootm_size=0xa000000
console=ttyS0,115200
cpu=armv7
devlist=1
dfu_alt_info_ram=kernel ram 0x42000000 0x1000000;fdt ram 0x43000000 0x100000;ramdisk ram 0x43300000 0x4000000
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
efi_dtb_prefixes=/ /dtb/ /dtb/current/
eth1addr=12:42:55:5d:02:ae
ethaddr=02:42:55:5d:02:ae
fdt_addr_r=0x43000000   
fdtcontroladdr=5bf58060
fdtfile=sun8i-h2-plus-orangepi-zero.dtb
kernel_addr_r=0x42000000
load_efi_dtb=load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} ${prefix}${efi_fdtfile}
loadsplash= for prefix in ${boot_prefixes}; do if test -e mmc 0 ${prefix}boot.bmp; then load mmc 0 ${splashimage} ${prefix}boot.bmp; bmp d ${splashimage}; fi; done
mmc_boot=if mmc dev ${devnum}; then devtype=mmc; run scan_dev_for_boot_part; fi
partitions=name=loader1,start=8k,size=32k,uuid=${uuid_gpt_loader1};name=loader2,size=984k,uuid=${uuid_gpt_loader2};name=esp,size=128M,bootable,uuid=${uuid_gpt_esp};name=system,size=-,uuid=${uuid_gpt_system};
preboot=usb start
pxefile_addr_r=0x43200000
ramdisk_addr_r=0x43300000
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_for_efi;
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done; setenv devplist
scan_dev_for_efi=setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}" -a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; for prefix in ${efi_dtb_prefixes}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${efi_fdtfile}; then run load_efi_dtb; fi;done;if test -e ${devtype} ${devnum}:${distro_bootpart} efi/boot/bootarm.efi; then echo Found EFI removable media binary efi/boot/bootarm.efi; run boot_efi_binary; echo EFI LOAD FAILED: continuing...; fi; setenv efi_fdtfile
scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${boot_syslinux_conf}; then echo Found ${prefix}${boot_syslinux_conf}; run boot_extlinux; echo SCRIPT FAILED: continuing...; fi
scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${script}; then echo Found U-Boot script ${prefix}${script}; run boot_a_script; echo SCRIPT FAILED: continuing...; fi; done
scriptaddr=0x43100000   
serial#=02c00042555d02ae
soc=sunxi
splashimage=66000000
splashpos=m,m
stderr=serial
stdin=serial,usbkbd
stdout=serial
usb_boot=usb start; if usb dev ${devnum}; then devtype=usb; run scan_dev_for_boot_part; fi
uuid_gpt_esp=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
uuid_gpt_system=69dad710-2ce4-4e3c-b16c-21a1d49abed3

Environment size: 4637/131068 bytes


usb_boot=usb start; if usb dev ${devnum}; then devtype=usb; run scan_dev_for_boot_part; fi
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done; setenv devplist
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_for_efi;

=> help
?         - alias for 'help'
base      - print or set address offset
bdinfo    - print Board Info structure
blkcache  - block cache diagnostics and control
boot      - boot default, i.e., run 'bootcmd'
bootd     - boot default, i.e., run 'bootcmd'
bootefi   - Boots an EFI payload from memory
bootelf   - Boot from an ELF image in memory
bootm     - boot application image from memory
bootp     - boot image via network using BOOTP/TFTP protocol
bootvx    - Boot vxWorks from an ELF image
bootz     - boot Linux zImage image from memory
cmp       - memory compare
coninfo   - print console devices and information
cp        - memory copy
crc32     - checksum calculation
dhcp      - boot image via network using DHCP/TFTP protocol
dm        - Driver model low level access
echo      - echo args to console
editenv   - edit environment variable
env       - environment handling commands
exit      - exit script
ext2load  - load binary file from a Ext2 filesystem
ext2ls    - list files in a directory (default /)
ext4load  - load binary file from a Ext4 filesystem
ext4ls    - list files in a directory (default /)
ext4size  - determine a file's size
false     - do nothing, unsuccessfully
fatinfo   - print information about filesystem
fatload   - load binary file from a dos filesystem
fatls     - list files in a directory (default /)
fatmkdir  - create a directory
fatrm     - delete a file
fatsize   - determine a file's size
fatwrite  - write file into a dos filesystem
fdt       - flattened device tree utility commands
fstype    - Look up a filesystem type
go        - start application at address 'addr'
gpio      - query and control gpio pins
gpt       - GUID Partition Table
help      - print command description/usage
iminfo    - print header information for application image
imxtract  - extract a part of a multi-image
itest     - return true/false on integer compare
load      - load binary file from a filesystem
loadb     - load binary file over serial line (kermit mode)
loads     - load S-Record file over serial line
loadx     - load binary file over serial line (xmodem mode)
loady     - load binary file over serial line (ymodem mode)
loop      - infinite loop on address range
ls        - list files in a directory (default /)
md        - memory display
mdio      - MDIO utility commands
mii       - MII utility commands
mm        - memory modify (auto-incrementing address)
mmc       - MMC sub system
mmcinfo   - display MMC info
mw        - memory write (fill)
nfs       - boot image via network using NFS protocol
nm        - memory modify (constant address)
part      - disk partition related commands
ping      - send ICMP ECHO_REQUEST to network host
printenv  - print environment variables
pxe       - commands to get and boot from pxe files
reset     - Perform RESET of the CPU
run       - run commands in an environment variable
save      - save file to a filesystem
saveenv   - save environment variables to persistent storage
setenv    - set environment variables
setexpr   - set environment variable as the result of eval expression
showvar   - print local hushshell variables
size      - determine a file's size
sleep     - delay execution for some time
source    - run script from memory
sysboot   - command to get and boot from syslinux files
test      - minimal test like /bin/sh
tftpboot  - boot image via network using TFTP protocol
true      - do nothing, successfully
usb       - USB sub-system
usbboot   - boot from USB device
version   - print monitor, compiler and linker version

 

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umiddelb

umiddelb

Posted
Posted

IMHO some of the recent mainline u-boot versions had difficulties to save the u-boot environment, which means that `saveenv´ will override not only the environment itself but also code-parts nearby, rendering the firmware unusable.  Therefore changes to the u-boot environment can only performed at build time for some boards.

 

 

 

 

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FRANK333

FRANK333

Posted
Posted

Hi, umiddelb,
I tried to clean up the nor spi and recharge an old U-boat but I didn't notice any difference.
I noticed a strange thing U-boot when it starts and finds the USB disk looks for a file boot.env not finding it continues finding boot.cmd processes it with error and restarts (this probably because boot.cmd is the one written on the sd card. Even if I recompiled and modified it) . The matter becomes more and more complicated ...

 

 

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martinayotte

martinayotte

Posted
Posted
6 hours ago, FRANK333 said:

The matter becomes more and more complicated ...

I've 2x OPiZero booting from USB without issue !

I don't see where your setup is choking, but I would recommend to check it step by step :

 

- stop U-Boot for getting command prompt.

- do "usb start" for the scanning.

- check your USB boot partition with "ls usb 0 /boot" to verify that everything is present.

- finally, try to boot using "run usb_boot"

 

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FRANK333

FRANK333

Posted
Posted

Hello Martinayotte ,
Departed from a clean installation,
I cleaned up both hdd and µSD and installed armbian on hdd with the appropriate option in armbian-config.
Of course if I restart the OP0 with the µSD inserted everything works fine.

 

I gave the commands you wrote above these are the results (without µSD insertd).

Spoiler

=> usb start

=> ls usb 0 /
<DIR>       4096 .
<DIR>       4096 ..
<DIR>       4096 bin
<DIR>       4096 boot
<DIR>       4096 dev
<DIR>       4096 etc
<DIR>       4096 home
<DIR>       4096 lib
<DIR>       4096 lost+found
<DIR>       4096 media
<DIR>       4096 mnt
<DIR>       4096 opt
<DIR>       4096 proc
<DIR>       4096 root
<DIR>       4096 run
<DIR>       4096 sbin
<DIR>       4096 selinux
<DIR>       4096 srv
<DIR>       4096 sys
<DIR>       4096 tmp
<DIR>       4096 usr
<DIR>       4096 var
=>


=> ls usb 0 /boot
<DIR>       4096 .
<DIR>       4096 ..

 

 

=> run usb_boot

IDE device 0: Vendor: Maxtor 6 Rev: 0811 Prod: Y080L0
            Type: Hard Disk
            Capacity: 78167.2 MB = 76.3 GB (160086528 x 512)
** Bad device specification usb -bootable **
Scanning usb :1...

 

 

 

 

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martinayotte

martinayotte

Posted
Posted
6 minutes ago, FRANK333 said:

=> ls usb 0 /boot
<DIR>       4096 .
<DIR>       4096 ..

This means your /boot directory of your USB drive is empty ...

Copy the /boot from SDCard into the USB drive and tweak the /boot/armbianEnv.txt of this USB copy so that "rootdev" is pointing to proper UUID found by "blkid".

 

EDIT: The issue of having empty /boot on USB is probably due to the fact that when you've ran the "nand-sata-install" you choose "boot from SD with USB rootfs".

If you have added "spi-jedec-nor" overlay, "nand-sata-install" would have show you an additional option named "boot from SPI with USB rootfs", which would not caused the issue.

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FRANK333

FRANK333

Posted
Posted

here I copied the directory /boot and changed UUID (there was already written the UUID of the hdd)

Spoiler

=> usb start

 


=> ls usb 0 /boot
<DIR>       4096 .
<DIR>       4096 ..
<SYM>         17 dtb
<DIR>      12288 dtb-4.19.62-sunxi
<DIR>       4096 overlay-user
             230 armbianEnv.txt
               0 armbianEnv.txt.out
            1536 armbian_first_run.txt.template
          230454 boot.bmp
            3726 boot.cmd
            3798 boot.scr
            4882 boot-desktop.png
          162659 config-4.19.62-sunxi   
<SYM>         17 dtb.old
         8128198 initrd.img-4.19.62-sunxi
         3299149 System.map-4.19.62-sunxi
<SYM>         21 uInitrd
         8128262 uInitrd-4.19.62-sunxi  
         7497384 vmlinuz-4.19.62-sunxi  
<SYM>         21 zImage
               0 .next

 


=> run usb_boot

IDE device 0: Vendor: Maxtor 6 Rev: 0811 Prod: Y080L0
            Type: Hard Disk
            Capacity: 78167.2 MB = 76.3 GB (160086528 x 512)
** Bad device specification usb -bootable **
Scanning usb :1...
Found U-Boot script /boot/boot.scr
data abort
pc : [<5ffa9612>]          lr : [<5ffa905d>]
reloc pc : [<4a02b612>]    lr : [<4a02b05d>]
sp : 5bf57500  ip : 00000003     fp : 00000005
r10: 5bfbc930  r9 : 5bf5dee0     r8 : 00000001
r7 : 5bf60e48  r6 : 5af56040     r5 : 5bf57528  r4 : 00000022
r3 : 0000005c  r2 : 5af560a3     r1 : 5bf60eb4  r0 : 5af5609f
Flags: nzCv  IRQs off  FIQs off  Mode SVC_32
Code: 4630fd7f 81f0e8bd e7d84606 bf082b2f (f822235c)
Resetting CPU ...

resetting ...

 

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FRANK333

FRANK333

Posted
Posted
Spoiler

usb_boot=usb start; if usb dev ${devnum}; then devtype=usb; run scan_dev_for_boot_part; fi

 

scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done; setenv devplist

 

scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run

 

scan_dev_for_scripts; done;run scan_dev_for_efi;

 

 

 

=> run scan_dev_for_extlinux
Found extlinux/extlinux.conf
Invalid filesystem: 0x43100000
SCRIPT FAILED: continuing...
=> run scan_dev_for_scripts
Found U-Boot script boot.scr.uimg
## Executing script at 43100000
Wrong image format for "source" command
SCRIPT FAILED: continuing...
Found U-Boot script boot.scr
## Executing script at 43100000
Wrong image format for "source" command
SCRIPT FAILED: continuing...
=>

I've tried these

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FRANK333

FRANK333

Posted
Posted
2 hours ago, martinayotte said:

Did you rebooted after adding "spi-jedec-nor" overlay ?

Doing "cat /proc/mtd" command, is it reporting the presence of SPI partitions ?

  • Yes, I restarted.
  • Finds the mtd0 partition 

    root@orangepizero:~# cat /proc/mtd
    dev:    size   erasesize  name
    mtd0: 00200000 00001000 "spi0.0"

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FRANK333

FRANK333

Posted
Posted (edited)

continues my battle with U-boats, and I appeal to anyone who knows anything.
Reading on the forum I found this command to control U-boot strings /dev/mtd0 | grep U-Boot and the result I wrote it in the spoiler below.
I did not understand exactly what it means surely is an error during the installation of U-boot that I did with these commands : flash_erase /dev/mtd0 0 128
flashcp /usr/lib/linux-u-boot-next-orangepizero_5.90_armhf/u-boot-sunxi-with-spl.bin /dev/mtd0
Last experiment I compared the script nand-sata install on OP0 and OP0+ but I did not notice differences so the lack of recognition of the spi is to be found upstream.

Spoiler

1625704885_Schermatadel2019-09-1320_33_27.thumb.png.54c2faccefc65a0e29f8d5bdbf068caf.png

 

Edited by FRANK333
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FRANK333

FRANK333

Posted
Posted (edited)
On 9/25/2019 at 11:26 AM, jhoney said:

If you boot from SPI (speaking from head, not sure) we search for boot.cmd on various devices, starting from ... I don't know. I was not doing much with booting from SPI and I am not aware of the defaults, but I am sure its possible to boot directly SPI -> SATA/USB.

 

[edit out spam links]

jhoney, uboot finds the .cmd file on the hdd, but this file is not written correctly (it seems to be an exact copy of the one on the sd) and then repeats for about ten times the operation and then freezes.
If I could write the .cmd file correctly as it happens for the orangePizero+ it would work.

Edited by TRS-80
edit out spam links
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mongoose

mongoose

Posted
Posted (edited)

similar to what @phier asked, I'm trying to change the u-boot environment variable bootdelay . I've tried adding

Quote

bootdelay=10

to armbianEnv.txt with no effect (it is still at the default of 2).

I then added

Quote

setenv bootdelay "10"

to boot.cmd and ran

Quote

mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
 

This completed and I can see that boot.scr got the line, but still the boot delay is at the default of 2.

Any idea what I am missing @lanefu ? I'm on a Le Potato booting from the microsd card

Edited by mongoose
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mongoose

mongoose

Posted
Posted (edited)

Thanks @FRANK333 , I actually have an orange pi too so bookmarked that guide.

 

For future readers:

As for changing u-boot on Le Potato, I just followed 

https://docs.u-boot.org/en/latest/build/gcc.html
https://docs.u-boot.org/en/latest/board/amlogic/libretech-cc.html

they've guides for lots of boards. Everything seems to work so far as I was able to boot into armbian. 

 

Also, I recommend getting a USB U-art cable and using the terminal program minicom so you can see what happens during u-boot and with timestamps

Edited by mongoose
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