I have a Question. | Cypress Semiconductor

I have a Question.

Summary: 1 Reply, Latest post by scutifer on 02 Dec 2014 08:44 PM PST
Verified Answers: 0
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Questional's picture
4 posts

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?




scutifer's picture
Cypress Employee
134 posts

 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.

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