Empty pinmux file in project.

[jeremyanderson]

I've created a project using the FRDM-K66F SDK and see an empty pinmux file, yet it works just fine with the board.  Using the project generator tool and importing the result to the IDE gives me a project with actual values in the pinmux files, but it does not offer the option of building or debugging.  What am I missing here?

[Alice_Yang]

Hi Jeremy,

Yes, the pin_mux.c file is empty when you create a new project , for you haven't configure any pins now.

I recommend you use the "MCUXpresso Config Tools" MCUXpresso Config Tools|NXP configure pins,

then it will generate pins_mux.h and pins_mux.h files , use the them replace the default two files on your project.

There also a getting start for MCXpresso Config  tools.

Hope it helps

Have a great day,
TIC

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[jeremyanderson]

Yes, thank you.  That does help.  What I am not understanding is why my project builds and runs without a populated pin_mux.c file

[Alice_Yang · Accepted solution]

Hi Jeremy,

I'm wondering why it can not builds nor runs ?

The functions BOARD_InitPins(void) in the file of pin_mux.c  is the pins which customer used,

if there is no pins to be used,  it will be empty, and it won't impact the project to build and runs.

BR

Alice