FT2232H in Sync FIFO Mode - TXE# stuck high

Hi,

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Have you checked the obvious, TXE# is connected to an FPGA input pin and not an output being driven high?

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Already checked, I proceeded the same way (with a different name of pin obviously, according to the datasheet) with TXE# and RXF# and RXF# works perfectly.

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Have you tried clearing the transmit buffer with FT_Clear()?

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If by FT_Clear you mean FT_Purge without success, I've tried this (can't find any FT_Clear in the D2XX Programmer's guide).

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Have you actually issued an FT_Read()? Does the FT_Read() come back with an error, timeout, etc? What is your host system/OS?

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I can call FT_Read() without any error but I will always have 0 BytesReceived (even if I ask to read several bytes), which is kind of normal because FT_GetQueueStatus always says there is nothing in the receiving buffer.

TXE# high telling me the ft2232h is never ready to receive any data.

I'm on Windows7 (32-bit).

I load my fpga by USB through the channel B of my fifo with the MorphLd Utility, could this be somehow related?

Edit : loading fpga by JTAG doesn't change anything.

Many thanks for your help, I'm kind of new to this whole thing.

Alexis