442 reputation
511
bio website pingswept.org
location Somerville, MA
age 41
visits member for 3 years, 10 months
seen May 16 '11 at 22:00

Embedded systems engineer.

I am currently working on an embedded Linux board for my new startup, Rascal Micro.


Jun
5
awarded  Nice Question
Feb
14
awarded  Notable Question
Nov
23
awarded  Yearling
Oct
3
awarded  Notable Question
Mar
19
awarded  Nice Answer
Nov
15
awarded  Notable Question
Sep
5
awarded  Popular Question
Dec
7
awarded  Yearling
Nov
17
awarded  Popular Question
Oct
31
awarded  Popular Question
Jan
3
comment Shell command to read device registers?
I think this route has potential, but it seems that there is a problem. This command executed as root: "dd if=/dev/mem bs=1 skip=10000 count=512" gives this error: "dd: /dev/mem: Bad address" I'm not sure what that means. Google tells me that it's something to do with changes introduced in the 2.6 kernel, but I don't understand enough about this yet to work around it.
Dec
21
comment Trouble getting busybox switch_root to work
Jackpot-- that worked exactly right. There was one other problem I had to solve (MMC driver needing a longer timeout) that kept it from working when I tried this previously, but with that fixed, it worked beautifully. Thanks.
Dec
21
accepted Trouble getting busybox switch_root to work
Dec
21
revised Trouble getting busybox switch_root to work
typo
Dec
21
asked Trouble getting busybox switch_root to work
Dec
20
comment Shell command to read device registers?
@Sen: Negative. I'm still stumped. I read the linked thread, which suggests that inw() doesn't do what I thought: "inb() and friends are only for emulation of the PCI and ISA IO address space." I've been using an oscilloscope and reading a lot of kernel driver code as my next best options.
Dec
17
asked Shell command to read device registers?
Dec
10
accepted How to generate initramfs image with busybox links?
Dec
9
awarded  Editor
Dec
9
comment How to generate initramfs image with busybox links?
Yes, that is actually true. I can run busybox --help once I boot the kernel on the ARM board. That's useful, but it doesn't help so much with generating the initramfs image.