Laurenz Kamp writes: > Hello, > > I am currently working with an FT232H that is connected to an FPGA that > generates the data that is sent to a PC over the FT232H. > > The setup works, I can receive data with no data loss. However, the > transmission speed is well below the advertised 40 MBytes/sec. I am currently > receiving around 28 MBytes/sec. The FPGA is sending data as soon as the TXE > line goes low, so I assume the bottleneck lies within the USB connection > between the FT232H and the PC. > > I am running Arch Linux and have installed libftdi from the packet sources. > The version is reported as 1.4-2. Has anyone experienced this behavior before > and knows a solution? > > Below is the code I use. I do check return values, I just removed the checks > to keep this message short. > > Hi,
I did not read the code. Two things to consider: - Sync Fifo speed needs a good PC and a good USB host implementation. - Did you try the svnc fifo example in libftdi? -- Uwe Bonnes [email protected] Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 1623569 ------- Fax. 06151 1623305 --------- -- libftdi - see http://www.intra2net.com/en/developer/libftdi for details. To unsubscribe send a mail to [email protected]
