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Why doesn't my FRDM-K64F board show up connected to a COM port in Device Manager when connected to my Win7 PC through USB?

Question asked by kamyiu on Jun 7, 2017
Latest reply on Jun 20, 2017 by Jorge Antonio Alcala Vazquez

Hello, I just bought the FRDM-K64F board a few days ago. I'm using a Windows 7 PC.

 

I'm following this startup guide: FRDM-K64F|Freedom Development Platform|Kinetis MCUs|NXP 

 

I plugged the board to my PC using a USB.  The green light flashes slowly but the RGB LED doesn't turn on when I tilt the board.  Why doesn't it turn on? 

 

I went ahead to Step 2 and installed the mbedSerial driver, but I don't see the Com Port show up in Device Manager.  What is going on and why is it not working?  I need this COM Port # so I can set up Putty.  Below is an image showing my Device Manager.  It just says "MBED microcontroller USB Device" under Disk drivers but the COM PORT doesn't show up.

 

Help please.

 

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