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by jorisvergeer
Wed Jan 09, 2013 8:44 pm
Forum: Bare metal, Assembly language
Topic: lwIP - A Lightweight TCP/IP stack
Replies: 20
Views: 7030

Re: lwIP - A Lightweight TCP/IP stack

Actually, LWiP does not need usb.

The only thing LWiP needs is a way to pass on and receive bits. the fysical layer doesn't matter.

You can use for example GPIO to send the ethernet packages to another RPi.
by jorisvergeer
Sat Jul 21, 2012 11:41 am
Forum: Raspbian
Topic: How is everyone compiling the armhf code?
Replies: 6
Views: 12622

Re: How is everyone compiling the armhf code?

I have build my toolchain using crosstool-ng It was pretty much the same as the toolchain bootc uses: http://www.bootc.net/archives/2012/05/26/how-to-build-a-cross-compiler-for-your-raspberry-pi/ I changed the float type to hard and i specified more specific RPi cpu arch and tune options. Also make ...
by jorisvergeer
Thu Jul 19, 2012 8:54 pm
Forum: Raspbian
Topic: bootc kernel compiled for armhf
Replies: 3
Views: 1408

bootc kernel compiled for armhf

Hello, For everyone who want to play with bootc kernel in raspbian. (http://www.bootc.net/projects/raspberry-pi-kernel/) A newer kernel version from the 3.2 branch with more modules and drivers enables. I compiled a version with armhf support. https://github.com/downloads/jorisvergeer/linux/RPi_boot...
by jorisvergeer
Thu Jul 19, 2012 3:32 pm
Forum: Raspbian
Topic: Compiler options
Replies: 21
Views: 13804

Re: Compiler options

I did some research: I compiled fftw3.2.2 with both the raspbian compiler on the raspberry pi and my optimized toolchain. It comes with a small benchmarking tool which i static linked with all dependencies (incl. libc and libm) So i got a benchmarking tool build with the original compiler/libc/libm ...
by jorisvergeer
Wed Jul 18, 2012 10:03 pm
Forum: Raspbian
Topic: New Raspbian release and i2c-tools
Replies: 3
Views: 24200

Re: New Raspbian release and i2c-tools

I alse needed to do:

sudo modprobe i2c-bcm2708
by jorisvergeer
Wed Jul 18, 2012 3:49 pm
Forum: Raspbian
Topic: Compiler options
Replies: 21
Views: 13804

Compiler options

The raspbian FAQ states that the following flags should be used: -march=armv6 -mfpu=vfp -mfloat-abi=hard Shouldn't they be these for the best optimization? -march=armv6zk -mcpu=arm1176jzf-s -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard I am no expert but this looks like it gives gcc some more speci...

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