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.
You can use control endpoint as vendor specific request.
Mister
There is a USB spec which describes a standard way to do device firmware upgrades:
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
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