lpcware

Advice needed on implementation strategy (mainly protocol)

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Pacman on Fri Jun 13 17:22:57 MST 2014
I'm thinking about making a small device, which is plugged into a computer's USB-port like a USB-stick.
It has a couple of output wires.

The job of the device would be to receive a text-file, parse it, and output a bitstream.
I'm imagining that it will work like copying a file from the computer onto a USB-stick; the difference is just that the storage is "limitless", and the file is not "saved".

In other words, it would behave like a "write-only" device, something similar to /dev/null ;)

How would you suggest to implement this the best way ?
-I'm completely new to USB (I've always avoided it, because I thought it was overwhelming), but I've read a bit about it, so I know there are different types of protocols, but I don't know which would suit my needs the best.
I wonder if it's best to "identify" as a storage device.

I haven't seen anyone do this before. What would be the right way to do something like this ?

Note: I'll probably be using a Cortex-M3 based device, perhaps the LPC134x or LPC175x/6x, maybe even a Cortex-M0; but definitely a Cortex-M device with USB support.

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