Anonymous
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Dec 01, 2014
06:42 PM
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Dec 01, 2014
06:42 PM
Hello there.
I have a qustion about USB
I am seeing the example code(cyfx3s_msc).
I don't under stand Why Check "USBS" in CyFxMscApplnDmaCb Function
Who make "USBS". Window Device Driver? DMA in Cypress?
Could you tell me answer?
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Anonymous
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Dec 02, 2014
08:44 PM
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Dec 02, 2014
08:44 PM
The MSC spec dictates this. See http://www.usb.org/developers/docs/devclass_docs/usbmassbulk_10.pdf Page 13. The driver is required to send 'USBC' in the CBW signature and we check for that in the DMA callback.