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Yes I used synchronous FIFO mode in the FT223H for the data channel.
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Nice!
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I attach a cropped SignalTapII recording, being clocked at 120MHz.
clk_ftdi is a 60 MHz Clock driven from the FTDI chip ... For short bursts SignalTapII shows the data being clocked in or out at every clock, then there is a variable gap between the bursts.
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Very cool! Thanks for uploading the images.
The FT2232H definitely looks like the way to go for implementing a USB interface to the FPGA. I'll have to test my FT2232H mini modules :)
While you were doing these tests, did you have any conflicts with the FTDI drivers and the USB-Blaster? I've seen cases where I cannot open a COM port while I have SystemConsole with a JTAG connection open. I suspect an issue with the drivers not playing nicely (since the USB-Blaster also uses FTDI drivers).
Cheers,
Dave
Honored Contributor
