How To Develop A Basic Operating System On The Raspberry Pi

http://www.cl.cam.ac.uk/freshers/raspberrypi/tutorials/os/?test=true

by pepsi_can • 14 years ago

105 18 14 years ago

cl.cam.ac.uk

simarpreet007• 14 years ago

Started this last night, looks good so far!

jnadeau• 14 years ago

I keep putting it off and leaving the link in my bookmarks. It seems like a fun little project.

jws• 14 years ago

Unfortunately, with modern hardware a "build an OS" tutorial goes nicely in small steps, until you hit "need a USB stack to get input".

Suddenly you are in the land of voluminous specs and large amounts of code to get anything working.

bengl3rt• 14 years ago

Yeah, why not just go for a simple UART terminal?

asb• 14 years ago

This is why the fact that Alex Chadwick has written just enough of a USB driver for HIDs is such a useful contribution.

hermanhermitage• 14 years ago

Unrelated to USB, but if would Be great if someone added the recent source release to show 'bare metal' use of the VideoCore services...

zwieback• 14 years ago

Right, which is FTDI's USB interface chips are so popular. Everyone has used USB-serial but there's also some USB host controllers with MCU-friendly interfaces.

sounds3• 14 years ago

I realize this is just one data point, but I implemented a full EHCI (USB 2.0) stack in 3 weekends. Then I implemented a simple mass storage driver in 2 more (that was the hardware I was targeting).

My HID implementation isn't worth talking about but it was helpful to test interrupt transfers.

krichman• 14 years ago

I'm assuming by the fact that it took you a few weekends, you are beyond the level of learning about OS's as an undergrad, though :) I'm sure it is doable, but the point is probably that it's a non-trivial detour from writing a basic OS.

sown2• 14 years ago

That sounds neat. If by chance you ever write a tutorial I'd be all ears! :D

lambda• 14 years ago

The RPi has a serial port, though it takes a custom cable to hook it up. You can do basic I/O with that, and much more simply than a USB stack.

JosephRedfern• 14 years ago

What's with the test parameter in the URL?

uxp• 14 years ago

It's a cheap hack to get around the de-duping system for submitted links. This article was submitted 53 days ago, with a good discussion about it: http://news.ycombinator.com/item?id=4467612

AceJohnny2• 14 years ago

This is the kind of stuff that I've been waiting to see on the Pi. It was touted as a "learning tool" by the foundation, but was co-opted by the hacker community as a cheap but full-fledged computer to hack with, completely overshadowing the teaching tool aspect.

throwaway1979• 14 years ago

I'm surprised you say "co-opted" for a couple of reasons.

1) I thought the intent of "learning tool" was teaching novices how to program in Python. This has huge ramifications in developing countries. In a mid to high income family in the US, it isn't clear if the raspberry Pi is the right computer to give to a child in order to teach them basic programming.

2) The hacker community's exploration is not devoid of learning. I'm a software guy and I've learned a great deal about hardware due to the Arduino and the Raspberry Pi. I don't think this overshadows the teaching aspects in any way.

How To Develop A Basic Operating System On The Raspberry Pi

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