Hi,
I'm using the 32-bit slave fifo sync interface and using the slfifosync example code.
When I do an IN transfer, the following OUT transfer has an extra word of zeros prepended to it. Any ideas? Is this expected?
I don't see the OUT direction GPIF flags asserted after the IN transfer. Even so, when I try an OUT transaction, I get this extra word. Any subsequent OUT transfer does not have the extra word. If I perform another IN transfer, then the very next OUT transfer again has the extra word.
Second question:
On the OUT direction I'm using the partial flag to indicate when I can do a high speed burst. This works fine, except that at power up this flag is incorrectly asserted. After any transfer, the flag is correct. To overcome this, I only do a high speed burst if both partial flag and the ready flag indicate that data is available. I have both flags set to "initial value = low", "asserted polarity = low". BTW, the ready flag does not have this behavior, only the partial flag. Also the IN direction flags work as expected. Anyway, is this incorrect initial polarity expected?
Thanks,
Joe
