How about Control In EP? Any error code?

Extracted sequence from philips C example. Compare with yours.
a) Setup interrupt handling
- 'Read interrupt register' + read 2 bytes
- - confirm target EP is control out EP

- 'Read last transaction status register' (control out) + read 1 byte
- - confirm this packet is Setup packet

- 'Select Endpoint' (Control Out) + read an optional byte
- 'Read buffer'
- - reserved byte
- - length
- - data bytes (length of)
- 'Clear buffer'

- 'Select Endpoint' (Control Out)
- 'Acknowledge setup'
- 'Clear buffer'
- 'Select Endpoint' (Control In)
- 'Acknowledge setup'

- validate packet on the memory: standard device request?, requested bytes?


b) Write to endpoint
- 'Select Endpoint' (control IN) + read an optional byte
- 'Write buffer'
- - 0 (reserved byte)
- - length (=8 for the first device descriptor)
- - data bytes (first 8 bytes of the device descriptor)
- 'Validate buffer'

Tsuneo