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Is it possible to implement a subset of USB protocol by SW?

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amtalan

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USB host by SW?

I want to use an USB pen to store data (no flash cards, too many pins) so I need an USB host device.

An USB host is normally associated with big controller (32bit) and separated USB controllers: too expensive!

Is possible to implement a subset of USB protocol by SW? Just to write data on the flash pen, not regarding the speed and the capability to connect multiple devices?

Best regards.

A.

:?: :?: :?:
 

Re: USB host by SW?

It is called USB on-the-go, IMHO it is too sophiscated to do it on small 8bit uP.
 

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