No Status Out transaction for USB on STM32F070F6

[David Ledger]

Hello,

I have coded some usb code which is correctly sending and recieving data. The problem is that at the end of sending the device descriptor no STATUS_OUT packet is sent.

I've done the following to get the above sending:

1. Copy the rx data from usb buffer (Packet Memory Area).
2. Determine the recieved request is a Device request.
3. Clear the CTR_RX flag.
4. Write device descriptor to transmit section of usb buffer (PMA).
5. Set STAT_TX to valid (by toggling with an XOR).

If I just to the above, this happens:

The above STAT_TX/IN transaction should result in a CTR_TX type CTR interrupt. Inside that handler I do the following:

1. Clear the CTR_TX flag.
2. Set STAT_RX/OUT to VALID, this should trigger the OUT transaction right?

Unfortunately it doesn't, does anybody have any ideas of what to check/try?

When I do the STAT_RX thing it does the following: