On 30/08/2011 00:58, Joshua Shriver wrote:
> I come from a programmer background, so not great at EE and everything
> I know either came from being a ham or playing with PICS so things
> like i2c and such are a struggle.
>

I2C and SPI are a doodle  compared to USB. USB is only easy if someone=20
else has written drivers for YOUR host & OS for that gadget. Plug and=20
Play is an illusion. It only works if the OS already has a driver for=20
the gadget.

However "bit banging" at any reliable timing  at even 1000bps is pretty=20
difficult even on 1GHz CPU on Windows, Linux or OS X, trivial at many=20
Mbps on a PIC 18F at 48MHz clock.

I2C is just reading a spec and doing a program. Not really EE. It's=20
pretty simple usually on a PIC16 or 18. But possibly not on a Raspberry=20
Pi. You could interface all the sensors to a PIC18F and use generic HID=20
to interface over USB. Or implement the Serial over USB and then a=20
protocol layer on top to address & interrogate a device. Then no USB=20
driver development needed.




--=20
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