Virtual Comport handup with connectivity line

[benderb]

Posted on December 23, 2009 at 10:45

Virtual Comport handup with connectivity line

[benderb]

Posted on May 17, 2011 at 13:35

Hi all,

I have integrated the new Ver. 3.1.0 of the USB-FS_DeviceLib with my application, using it as a virtual com port.

So far, it works fine on both 103 and 105.

However, on the 105 (connectivity line), the application stops working some time after I close the PC application that reads data from its IN endpoint.

As soon as I restart the PC app, the application resumes fine.

Using the jtag debugger I think I see an endless succession of interrupts from the USB peripheral. For some time after closing the port on the PC, data seems be go out fine, but then, no more data is requested from the application on the MCU, and there seem to be only back-to-back interrupts coming from the USB peripheral.

This does not happen while the USB cable is disconnected.

Anyone seem something like this? Any Ideas?

Thanks

Bernhard