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| how can i improve speed of usb interrupt transfer http://www.at91.com/samphpbb/viewtopic.php?f=24&t=18716 |
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| Author: | wavelets [ Fri Oct 16, 2009 11:47 am ] |
| Post subject: | how can i improve speed of usb interrupt transfer |
I wanna test the high speed usb interface of SAM3. On the microcontroller I use 2 endpoints for Interrupt in and out. On pc I use the example of Winusb from http://www.lvr.com/winusb.htm The device sends 1024Bytes to the PC. The PC can get the right data. But the speed is very low. the device is recognized by pc as high speed device. In the oscillograph the microframe is right with a 125us interval. "Bus Hound" shows that the phase IRP occupy the most time. Where can be the problem? Thanks in advance! |
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| Author: | nat [ Fri Nov 13, 2009 12:34 pm ] |
| Post subject: | Re: how can i improve speed of usb interrupt transfer |
test post r |
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| Author: | jmaygarden [ Sat Feb 06, 2010 12:34 am ] |
| Post subject: | Re: how can i improve speed of usb interrupt transfer |
Don't use interrupt pipes |
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