USB host controller recomendation

- P
- Paul Carpenter
  
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posted
14 years ago

Tue, Aug 11, 2009 9:44 AM

I never mentioned Real Time or even Operating System.

As soon as you put a micro/cpu some form of software has to be there, USB requires several stages of operations and scheduling of the USB traffic, even with one device.

Devices still have to be enumerated, and endpoints handled.

Cameras normally have two types of flow, control and data. Where the data is isochronous mode bulk transfer due to its nature. These are often handled as different endpoints or in some cases a composite device with effectively two devices.

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- C
- Chris H
  
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posted
14 years ago

Tue, Aug 11, 2009 10:41 AM

In message , Paul Carpenter writes

True but others have been pushing an OS for this (not even an RTOS)

Yes it does get complex. For USB it is usually cost effective to buy in a stack rather than try and do your own.

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