I am attempting to craft an auto-updater image consisting of three files in
a FIT multi-image:
* u-boot.bin (Binary 512 KiB u-boot image)
* boot.itb (FIT Multi-image)
- vmlinux.bin.gz (Compressed Binary Linux Kernel)
- devices.dtb (Binary FDT Blob)
* root.img (JFFS2 File System)
and a script that effectively does:
# Erase and write u-boot
protect off fff80000 ffffffff
era fff80000 ffffffff
cp.b [EMAIL PROTECTED] fff80000 <size>
protect on fff80000 ffffffff
# Erase and write boot images (primary and secondary)
nand erase 0 400000
nand write.i [EMAIL PROTECTED] 0 <size>
nand erase 1C00000 400000
nand write.i [EMAIL PROTECTED] 1C00000 <size>
# Erase and write root file system images (primary and secondary)
nand erase 800000 1400000
nand write.i [EMAIL PROTECTED] 800000 <size>
nand erase 2400000 1400000
nand write.i [EMAIL PROTECTED] 2400000 <size>
when the user runs:
=> tftp 800000 aupd.itb
=> autoscr 800000
Based on my experience in working with the FIT multi-image 'boot.itb' above,
this seems like it should work; however, a few questions come to mind:
1) Can a script self-reference files within the FIT multi-image as
indicated above ([EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL
PROTECTED], etc.)?
2) Must the <size> values for 'cp.b' and 'nand write.i' be hard-coded in
the script or can these be extracted somehow dynamically from the FIT
image?
3) What is an appropriate 'type' for 'u-boot.bin' and 'boot.itb' in the
FIT multi-image? The type "firmware" seems appropriate in terms of
how the code treats such a type but the name slightly misleading for
this application.
Thanks,
Grant
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