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Bare metal programming: I need to write my own Ethernet driver for the raspberry pi, but I can't find the programmer's hardware manual or other documentation on how to code to the Pi's Ethernet hardware interface. Can some point me in the right direction on this?

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    The interface is actually a usb to ethernet chip. I guess you have to implement enough of a usb stack first.
    – M Noit
    Commented Jan 27, 2014 at 11:07
  • And then get the data sheet / programming manual for the USB Ethernet chip.
    – Chris Stratton
    Commented Jan 28, 2014 at 17:48

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USPi is a bare metal USB driver for the Raspberry Pi written in C. The author has accessed the ethernet controller via internal USB hub

https://github.com/rsta2/uspi/tree/master/sample/ethernet

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