Re: [Fx2lib-devel] Sourcing slave FIFO packets

[Daniel O'C. <doc...@gs...>]

On 27/02/2011, at 5:12, Chris McClelland wrote:
> Has anyone managed to get an FX2 firmware to compose a packet from scratch 
> (i.e not originating from the USB host) and commit it to a slave FIFO? The 
> TRM seems to suggest it's only necessary to disable AUTOOUT, write the 
> packet to the endpoint buffer (e.g EP6FIFOBUF) and writing the packet length 
> to EP6BCH/EP6BCL, but I can't get it to work. See http://bit.ly/hQxIR1 for 
> example code (composes a packet to send to EP6's FIFO when a certain control 
> request is received).

In my code EP1 in/out and EP6/EP8 have data sent to/from the micro directly and EP2 sends data to the PC using GPIF.

I think your problem is that you set the NAK bit in the FIFO and then try and send it so I presume the PC is seeing a NAK reply from the FX2 instead of getting your data packet.

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
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