MoretonSlumber Posted September 30, 2013 Report Share Posted September 30, 2013 Hello.I'm having problems programming a couple of Papilio Pro boards. I'm using loader v2.5 and have the latest Java v7 release installed along with the latest FTDI drivers (Win7 x64 machine). I constantly (well 99% of the time) get the message "Could not access USB device 0403:6010.". Once or twice the FPGA has been detected with a "scan" command but that's as far is it goes. I've tried various USB cables and have tried three machines - XP and Win7. In ControlPanel>DeviceManager>USBControllers / Ports the hardware is rarely visible. I think this is an application/driver problem. Any hints or advice gratefully accepted.Graham. Link to comment Share on other sites More sharing options...
MoretonSlumber Posted September 30, 2013 Author Report Share Posted September 30, 2013 I noticed that the readback of the device id code was erratic pointing to a possible signal integrity problem. A short (250 mm) USB lead has made programming 100% reliable. Link to comment Share on other sites More sharing options...
Jack Gassett Posted October 1, 2013 Report Share Posted October 1, 2013 Phew, I'm glad that it is working now, I was at a bit of a loss on what advice to give in this situation. Is everything ok now? Jack Link to comment Share on other sites More sharing options...
MoretonSlumber Posted October 4, 2013 Author Report Share Posted October 4, 2013 Everything is working fine now, thanks. All that was needed was a short USB cable. Link to comment Share on other sites More sharing options...
james1095 Posted October 8, 2013 Report Share Posted October 8, 2013 I've had no trouble using a 6' USB cable on mine. I did find that the cheap cable that came with my Papilio Pro was bad right out of the box though. I had other cables so I didn't bother investigating in depth but I suspect the wires may have been too thin to supply adequate current to the FPGA, these things are fairly power hungry relative to most USB gadgets. Link to comment Share on other sites More sharing options...
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