PO220

COM port must be closed from the terminal tool prior to unplugging the CDC device

Discussion created by PO220 on Jul 12, 2017
Latest reply on Jul 18, 2017 by Daniel Chen

In the readme file of the example USB cdc Virtual com port (usb_device_cdc_vcom) it is written :

@Because there is no dynamic detection between the host and the device, the COM port must be closed from
the terminal tool prior to unplugging the CDC device. Otherwise, the CDC device won’t get recognized next
time when plugging in with the COM port still opened.

 

Is this behavior a constraint of any virtual com port OR is it specific to the hardware frdmK64 OR is it specific to this example (and can be improved) ? 

I do not find any information on this point and I have no CDC devices on hand to compare.

 

Thank you in advance

 

 

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