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Trouble with MQX USB Driver for K22

Question asked by Patrick McKnight on Apr 7, 2017



I’m attempting to debug a USB channel using a K22. The driver I’m using is a modified version of the Virtual Comm port example contained in the MQX 4.1.1 release. Namely it has been modified to provide 3 virtual comm ports.


The issue I’m seeing seems to be linked to not receiving a token done interrupt when I expect to and after that I can’t get any more data through that comm port. It feels like a state transition issue or an interrupt configuration issue to me but I can’t put my finger on it.


Any thoughts would be greatly appreciated.