How to use USB0_DP and USB0_DM as UART in K22FN512VLH12 MCU

[vishalgirisagar]

Hi Everyone,

  I am using K22FN512VLH12 MCU in our upcoming product. For debugging purposes, I was using UART TX and RX pins till now and I was using external USB to UART converter to connect to my Laptop/PC and look at the debug logs. I am thinking why cant I use USB0_DB and USB0_DM pins for comm pins between my laptop and MCU. I saw the same thing in Teensy3.1 schematics. but I am unsure about how to use it. Can someone please provide me guidelines on this. It will be of great help.

[jeremyzhou]

Hi Vishal,,

Communication Device Class can make the USB emulates the UART interface well, and you can learn detail inforamtion about the Communication Device class at the www.usb.org.

KINETIS-SDK contains CDC demo for K22 and please go for download through the link as below.

Software Development Kit for Kinetis MCUs|Freescale
Have a great day,
Ping

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