Hallo, I have got a FX2 Board from Cypress, which is connected to the PC using USB2.0. My goal is to get quite a big bandwidth transmitted from the FX2 to the PC (my goal is actually about 15 MB/s, and many people told me that this is posible)
My first attemts have been using libusb with a program just to fetch the data and measure the datarate. The achieved datarate was 3-4 MB/s. So I started using threads, but the result did not improve dramatically. NExt trial was writing a kernel driver to get the data using synchronous usb requests. I again got 4 MB/s - as expected. Next goal was not to improve the kernel driver to using asynchronous usb requests.(4 in parallel so getting a thereotical bandwidth of 16 MB/s Unfortunately it does not work yet. It hangs as soon the driver internally sees the first data arriving via USB cable. Could anybody have a look at the code to see if there are basic mistakes ? Thank you in advance. the code can be found at http://194.208.18.155/driver.tar.gz or in the attachment. -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer
driver.tar.gz
Description: GNU Zip compressed data
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