pingswept

337 reputation

210

bio	website	pingswept.org
	location	Somerville, MA
	age	40
visits	member for	2 years, 5 months
	seen	May 16 '11 at 22:00
stats	profile views	27

Embedded systems engineer.

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

	337 reputation	bio	website	pingswept.org	visits	member for	2 years, 5 months
210 badges		location	Somerville, MA		seen	May 16 '11 at 22:00

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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.
Dec 9	revised	How to generate initramfs image with busybox links? deleted 92 characters in body
Dec 9	asked	How to generate initramfs image with busybox links?
Dec 8	awarded	Scholar
Dec 8	comment	Debugging ethernet before NFS boot Using wireshark, I can see that it's not sending packets to the right address or broadcasting DHCP requests, but I can't capture directly from the device because I don't have a hub. I do have a serial console that's working-- I'll give the initramfs approach a try. Thanks for the suggestions.