CdcAcmSerialDriver resolves wrong interfaces In/Out

[konradzuse]

I have a CDC device that wasn't working. After some debugging in the CDC driver code, I realised that the IN and OUT interfaces were mixed up. The code assumes the order is always the same.

I rewrote it to be like this;

int numberEndpoints = mDataInterface.EndpointCount;
                
                for(var i=0;i<=numberEndpoints-1;i++)
                {
                    var endpoint = mDataInterface.GetEndpoint(i);
                    if(endpoint.Type == UsbAddressing.XferBulk
                       && endpoint.Direction == UsbAddressing.In)
                    {
                        mReadEndpoint = endpoint;
                    }else if(endpoint.Type == UsbAddressing.XferBulk
                             && endpoint.Direction == UsbAddressing.Out)
                    {
                        mWriteEndpoint = endpoint;
                    }
                }

so the ordering of the interfaces no longer matters, it should resolve the In and Out interfaces according to their direction.

Hope this helps someone else stuck with this.

[anotherlab]

If you would like to submit a pull request, we would be happy to review it.