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USB Superspeed Peripherals

arnova2
New Contributor II

I'm using vendor commands (implemented in the setup callback function) to implement i2c register read/write to/from my FPGA. I was wondering: How does one normally report back to the host (PC) that the i2c transfer failed? I assumed that returning false from the Setup-Callback (in some examples used by some "isHandled"-logic) would do this, but apparently it's not. Furthermore I was unable to find what exactly is done with the value returned from the Setup-callback-function.

Would one simply implement an additional vendor command for reading back the result of the previous vendor command?

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Hemanth
Moderator
Moderator

Hi,

When CyU3PUsbSendEP0Data() or CyU3PUsbGetEP0Data() is called before returning false from the fallback, then the control transfer will not fail.

Regards,

Hemanth

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