Re: Raspberry Pi as an inexpensive embedded LCDproc server

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Am 24.08.2012 23:55, schrieb paul_c:
> On Friday 24 August 2012, Markus Dolze wrote:
>> I haven't done any research yet - is there a GPIO framework for
>> Linux one can use instead of rolling our own?
> 
> As far as I'm aware, there is no "generic" GPIO framework used
> across the assortment of kernels and architectures - On the Arm SoC
> systems, it gets even worse with each chip (seemingly) having a
> different memory map.

I know the userspace-method of using /sys/class/gpio but that would be
extremely slow ...

> [...] Agreed - No point in reinventing the wheel, and (after a
> casual look) it would appear that the existing hd44780-i2c driver
> would work on a Pi without any modifications. Subject to the i2c
> kernel driver being loaded. I don't have any suitable i2c
> peripherals, so can't test..

I can do the testing :) I have a RaspberryPi with I2C-driver working,
a PCF-connected HD44780-display and I got it running on the NGW100
some years ago.

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