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USB CDC VCOM - Consecutive RXs Fail

Question asked by variable_andrew on Mar 20, 2020
Latest reply on Apr 1, 2020 by variable_andrew

Using the MCUXpresso SDK 2.7.0 dev_cdc_vcomm_freertos demo as a starting point, if i remove the "echo" functionality - so that i'm just receiving data, receive gets stuck/ stops receiving data after 1 packet.

 

If I leave the echo in there, everything works fine.

Is there something in the USB CDC Vcomm stack that is resetting the receive functionality via the USB_DeviceCdcAcmSend function?

 

I just realized I asked the same question for RT1020 but never received an answer - so asking again for the RT1052:

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