Create an sdcard image that can be written directly to sdcard

[rosaschafe]

Hello,

I would like to know how to make an SD card image easily

First, I followed https://github.com/Jun1172/nuc980-open-source-project
https://blog.csdn.net/Jun626/article/details/104730949
https://blog.csdn.net/Jun626/article/details/104737311

And I then tried to dd it as the documentation (NUC980 NuWriter User Manual EN.pdf) said the bootloader is going to check SD card at 0x400 for signature and boot it.
I used the writer tool to generate the pack.bin (run.ini attached) and did sudo dd ibs=32 iseek=1 if=pack.bin of=/dev/mmcblk0 obs=1024 oseek=1 but It didnt work.

After some tries, I found out that I have to use the devkit in USB mode along with nuc980 writer commandline tool (after I change pack = yes to pack = no).

using that I was able to boot uboot off the sd card

so, I compared the two sd card [working and non working] images first bytes and found the diff:

┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐
│00000000│ 00 00 00 00 00 00 00 00 ┊ 00 00 00 00 00 00 00 00 │⋄⋄⋄⋄⋄⋄⋄⋄┊⋄⋄⋄⋄⋄⋄⋄⋄│
│*       │                         ┊                         │        ┊        │
│00000200│ 57 42 55 aa 01 00 00 00 ┊ ff ff ff ff 57 42 59 63 │WBUו⋄⋄⋄┊××××WBYc│
│00000210│ 00 00 01 00 00 00 08 00 ┊ 00 02 00 00 7f 00 08 00 │⋄⋄•⋄⋄⋄•⋄┊⋄•⋄⋄•⋄•⋄│
│00000220│ 00 00 00 00 00 00 00 00 ┊ 00 00 00 00 00 00 00 00 │⋄⋄⋄⋄⋄⋄⋄⋄┊⋄⋄⋄⋄⋄⋄⋄⋄│
│00000230│ ff ff ff ff ff ff ff ff ┊ ff ff ff ff ff ff ff ff │××××××××┊××××××××│
│*       │                         ┊                         │        ┊        │
│00000400│ 20 54 56 4e 00 00 e0 00 ┊ e0 62 03 00 ff ff ff ff │ TVN⋄⋄×⋄┊×b•⋄××××│
│00000410│ 00 08 40 00 00 00 00 00 ┊ 00 ff ff ff ff ff ff ff │⋄•@⋄⋄⋄⋄⋄┊⋄×××××××│
│00000420│ 55 aa 55 aa 2e 00 00 00 ┊ 64 02 00 b0 18 00 00 c0 │U×U×.⋄⋄⋄┊d•⋄ו⋄⋄×│
│00000430│ 20 02 00 b0 18 00 00 01 ┊ aa 55 aa 55 01 00 00 00 │ •⋄ו⋄⋄•┊×U×U•⋄⋄⋄│
│00000440│ aa 55 aa 55 01 00 00 00 ┊ 28 20 00 b0 4a d8 dc 53 │×U×U•⋄⋄⋄┊( ⋄×J××S│
│00000450│ 08 20 00 b0 14 80 00 00 ┊ aa 55 aa 55 01 00 00 00 │• ⋄ו×⋄⋄┊×U×U•⋄⋄⋄│
│00000460│ aa 55 aa 55 01 00 00 00 ┊ aa 55 aa 55 01 00 00 00 │×U×U•⋄⋄⋄┊×U×U•⋄⋄⋄│
│00000470│ 00 20 00 b0 7e 04 03 00 ┊ aa 55 aa 55 01 00 00 00 │⋄ ⋄×~••⋄┊×U×U•⋄⋄⋄│
│00000480│ 04 20 00 b0 21 00 00 00 ┊ aa 55 aa 55 01 00 00 00 │• ⋄×!⋄⋄⋄┊×U×U•⋄⋄⋄│
│00000490│ 04 20 00 b0 23 00 00 00 ┊ aa 55 aa 55 01 00 00 00 │• ⋄×#⋄⋄⋄┊×U×U•⋄⋄⋄│
│000004a0│ aa 55 aa 55 01 00 00 00 ┊ aa 55 aa 55 01 00 00 00 │×U×U•⋄⋄⋄┊×U×U•⋄⋄⋄│
│000004b0│ 04 20 00 b0 27 00 00 00 ┊ 20 20 00 b0 00 00 00 00 │• ⋄×'⋄⋄⋄┊  ⋄×⋄⋄⋄⋄│
│000004c0│ 24 20 00 b0 00 00 00 00 ┊ 1c 20 00 b0 00 40 00 00 │$ ⋄×⋄⋄⋄⋄┊• ⋄×⋄@⋄⋄│
│000004d0│ 18 20 00 b0 32 03 00 00 ┊ 10 20 00 b0 06 00 00 00 │• ⋄×2•⋄⋄┊• ⋄ו⋄⋄⋄│
│000004e0│ 04 20 00 b0 27 00 00 00 ┊ aa 55 aa 55 01 00 00 00 │• ⋄×'⋄⋄⋄┊×U×U•⋄⋄⋄│

The bytes at 200h was is unexpected. (WBU) I found a reference in code https://github.com/OpenNuvoton/NUC980_NuWriter_CMD/blob/master/Serial.h#L285 but this struct is not used anywhere.

Can anybody tell me where am I wrong?

Side question: WBU stand for Winbond? TVN => reverse Nuvoton?

[ychuang3]

pack.bin is still for NuWriter, not for dd.
It is strongly suggested to use NuWriter.