Question: How is pdata.tsize initialized in zephyr/subsys/usb/usb_transfer.c?

[tluio]

In function usb_transfer_sync, pdata.tsize is returned. I wonder how it is initialized. Is it initialized through DMA?

[jfischer-no]

For usb_transfer_sync(), which blocks until finished, pointer to the pdata is cb_data and pdata.tsize will be assigned in the callback of usb_transfer().

[tluio]

Thank you very much! Would you please tell me how usb_transfer_sync() blocks.

[eobalski]

There is semaphore which is taken and later released.

[tluio]

@emob-nordic Thank you! Now I think I should close this issue.