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USB double trouble

Hello,

I have a LPC2478 than I can address via 2 data sources: A CDC device and a USB to RS-485 converter. I see something very strange: If I try to use them in parallel, the USB CDC transfers are starting to logged by my sniffer as "canceled" - it is then required to unplug and re-plug the USB cable (of the CDC device). What is happening here?

Thanks in advance!

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0 Tamir Michael over 15 years ago in reply to Tsuneo Chinzei

Tsuneo,

Thanks for your reply. I have found the cause: the UART interrupt changing a global variable caused the CDC device to fail to reply sometimes ! Thanks a lot for your advise!
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0 Tamir Michael over 15 years ago in reply to Tsuneo Chinzei

Tsuneo,

Thanks for your reply. I have found the cause: the UART interrupt changing a global variable caused the CDC device to fail to reply sometimes ! Thanks a lot for your advise!
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