USB endpoint/interface question.

Jan 25, 2008 2 Replies
J

Hello.



I am developing with ATMEL 8bit MCU and this device is recognized as HID keyboard in windows. Currently this device has 1 IN endpoint that transfer data from device to PC. I need to make this device flash upgradable and need OUT transfer for that. I examined USB book and I wonder I just need to add another OUT endpoint or I should add another interface. I am curious about this because keyboard interface may not support OUT transfer. Please answer



Thanks.


Vote
Twitter Facebook LinkedIn
M

You can use control endpoint as vendor specific request.

Mister

Vote
Twitter Facebook LinkedIn
W

There is a USB spec which describes a standard way to do device firmware upgrades:

formatting link
formatting link
It simply uses the Control endpoint, which is bidirectional.

Other USB devices I am familiar with use similar schemes, even if they do not actually follow the DFU standard.

Wim Lewis , Seattle, WA, USA. PGP keyID 27F772C1
Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required