Hello there, I'm using winusb to communicate with a DFU device via control transfer. The problem is: When sending a single request (DFU_CLRSTATUS, DFU_GETSTATUS, v.v.) it's working properly When sending two or more requests consecutively, it doesn't work. For example: If I send DFU_CLRSTATUS (1), then DFU_GETSTATUS (2), the second call returns no data (TransferBufferLength=0). It happens on some computers only (both win 10 and 11) Thank you

No data response from USB Control Transfer

Chinh Cao 1

Hello there,

I'm using winusb to communicate with a DFU device via control transfer. The problem is:

When sending a single request (DFU_CLRSTATUS, DFU_GETSTATUS, v.v.) it's working properly
When sending two or more requests consecutively, it doesn't work. For example: If I send DFU_CLRSTATUS (1), then DFU_GETSTATUS (2), the second call returns no data (TransferBufferLength=0).
It happens on some computers only (both win 10 and 11)

Thank you