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Author Topic: Really funky characters when booting kernel  (Read 1888 times)
aurelius
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« on: February 18, 2012, 09:24:53 PM »

I have recently upgraded the uboot on my globalscale sheevaplug. I'm attempting to get a kernel working, but there seems to be a gremlin somewhere inside the plug.

Here is my enviroment:
Code:
Marvell>> printenv
arcNumber=2097
baudrate=115200
bootargs=console=ttyS0,115200 mtdparts=nand_mtd:0x400000@0x100000(uImage),0x1fb00000@0x500000(rootfs) rw root=/dev/mtdblock1 rw
bootargs_console=console=ttyS0,115200
bootargs_root=root=/dev/mtdblock2 ro
bootcmd=nand read 0x800000 0x100000 0x400000; bootm 0x800000
bootcmd_mmc=mmc init; ext2load mmc 0:1 0x00800000 /uImage; ext2load mmc 0:1 0x01100000 /uInitrd
bootdelay=3
ethact=egiga0
ethaddr=02:50:43:c1:74:d6
fileaddr=800000
filesize=15E630
ipaddr=192.168.1.200
mainlineLinux=yes
serverip=192.168.1.65
stderr=serial
stdin=serial
stdout=serial

Environment size: 614/131068 bytes
Marvell>>

I've set up a tftp server with uImage and uInitrd in it.
Code:
Marvell>> tftpboot 0x01100000 uInitrd
Marvell>> tftpboot 0x00800000 uImage
Both seem to work

Code:
Marvell>> bootm 0x00800000 0x01100000

Gets me to a screen that looks like it is an installer, but the text is garbled. Completely unreadable. Any ideas?
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kveroneau
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« Reply #1 on: May 20, 2012, 11:14:44 AM »

Did you find a solution to this?  I have the exact same issue, and am unsure how to proceed. Here is my unanswered post:
http://www.plugcomputer.org/plugforum/index.php?topic=6089.0
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cbxbiker61
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« Reply #2 on: May 20, 2012, 06:27:46 PM »

Try a different emulator.

Here's a script that I used to talk to my Sheeva's and CuBox's.

Code:
#! /usr/bin/kermit
set line /dev/ttyUSB0
set FLOW AUTO
set speed 115200
set serial 8n1
SET CARRIER-WATCH OFF
connect
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