I am trying to upgrade the system via the USB serial port. I am transferring the file via ymodem, and trying to flash via the command

sf erase 0xC0000 +0x540004; sf write 0x81000000 0xC0000 0x540004
SF: 5570560 bytes @ 0xc0000 Erased: OK
SF: 5505028 bytes @ 0xc0000 Written: OK

However, I receive the following message when it resets. What am I doing wrong?

Hit '<ESC>' key(s) to stop autoboot: 0
## Booting image at 9f0c0000 ...
Bad Magic Number

Thanks.

I am able to flash the kernel at the address 0xC0000. But I get an error when erasing the entire address space

sf erase 0xC0000 0x540004; sf write 0x81000000 0xC0000 0x540004

When I erase only the size of the uImage, it works fine...


Also, the serial port on the module (not development board) writes garbage after a point.

[ 0.093917] MIPS: machine is 8devices Lima board
[ 0.537503] ar724x-pci ar724x-pci.0: PCIe link is down
[ 0.541154] registering PCI controller with io_map_base unset
[ 0.550483] PCI host bridge to bus 0000:00
[ 0.553400] pci_bus 0000:00: root bus resource [mem 0x10000000-0x11ffffff]
[ 0.558305] pci_bus 0000:00: root bus resource [io 0x0000]
[ 0.562254] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[ 0.567064] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 0.573184] Switched to clocksource MIPS
[ 0.576808] NET: Registered protocol family 2
[ 0.580457] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.585448] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.589960] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.594540] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.598688] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.603345] NET: Registered protocol family 1
[ 0.607097] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.621277] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.625449] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.634012] io scheduler noop registered
[ 0.636801] io scheduler deadline registered (default)
[ 0.640626] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 0.645419] console [ttyS0] disabled
[ 0.668033] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11, base_baud = 2500000) is a 16550A
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....

Any ideas on why this output is garbage?


Cheers,
Ryan

Try to change terminal/cable.

Thanks. It seems to be HW related.