MCUXpresso GeneralのトピックMCUXpresso Pins tool functional groups not working as expected

MCUXpresso Pins tool functional groups not working as expected

scottm — Mon, 29 Dec 2025 00:08:49 GMT

I must be misunderstanding what the Functional Group option is for in the Pins tool, because how it's working doesn't make sense to me.

I've got one project that supports two significantly different boards. They have about 60% of the same pin assignments. My understanding was that the way to set up the two configurations in the Pins tool is to create a functional group for each. Each gets its own prefix and its own init function - that part makes sense and fits with what I need to do.

Where it's going wrong is that I can't actually assign different functions and identifiers to the pins in the differed groups. My initial configuration has the prefix EB6. I copied that to the secondary configuration, EB2. I spent half an hour entering all of my changes for the EB2 group, only to discover that they'd overwritten the EB6 group.

All of the changed identifiers wiped out the originals. I'm struggling to understand why the identifier prefix is even provided if it's not to deconflict identifiers between groups.

What's the correct way to do this with the Pins tool? How do I define two separate sets of pin configurations to go with the different build configurations?

Thanks,

Scott

Re: MCUXpresso Pins tool functional groups not working as expected

Alice_Yang — Mon, 29 Dec 2025 07:35:35 GMT

Hi @scottm

I performed a test on my side using the P1_13 pin and configured it in two groups.

In the generated code, there was no overwrite issue. You can use macro definitions to call the two functions as needed. Below are the two generated functions:

Alice

Re: MCUXpresso Pins tool functional groups not working as expected

scottm — Tue, 30 Dec 2025 01:42:50 GMT

Hi Alice,

It's not letting me see your images full-size, but I don't think that's addressing the issue anyway. Here's an illustration using an SDK example. In group PINS1, I assign PIO1_4 to be a GPIO called RED_LED.

In group PINS2, I assign PIO1_4 to be GREEN_LED:

But that overwrites the PINS1 definition:

Additionally, even though both groups are configured, I only seem to get macros for PINS1:

And this is a minor quibble, but do you think we could get the colors changed for the functional group box so it's readable in dark mode?

Cheers,

Scott

Re: MCUXpresso Pins tool functional groups not working as expected

Alice_Yang — Tue, 30 Dec 2025 04:20:22 GMT

Hello @scottm

If both groups are called by the initialization function, yes, they will be overwritten. For the same pin, you should only call it once in one function. Therefore, configuring as shown below will not overwrite.

Please try it on your side, and feel free to contact me if you still have any issues. Thank you.

Alice

Re: MCUXpresso Pins tool functional groups not working as expected

scottm — Wed, 31 Dec 2025 01:13:04 GMT

Hi Alice,

I did some more testing and the default initialization option had no effect, but I think I did find something to report.

If you enter the identifiers in the Pins view, it doesn't work - it overwrites both functional groups and doesn't generate initialization for anything you entered there:

But it looks like it works if you enter it here, in Routing Details:

Then it generates initialization code and macros, and combines the identifiers using a semicolon.

Scott

Re: MCUXpresso Pins tool functional groups not working as expected

Alice_Yang — Wed, 31 Dec 2025 02:08:53 GMT

Hello @scottm

Yes, thanks for sharing.
In the pin view, we can add more identifiers, separated by semicolons (；).

Thank you.

Alice