topic Re: BOARD_InitLEDSPins() isn't being called in LPC Microcontrollers

BOARD_InitLEDSPins() isn't being called

aaronm — Wed, 23 Nov 2022 15:27:03 GMT

I'm using:

MCUXpresso v11.6.1

SDK_2.x_LPC810 version 2.9.0

LPC812M101JDH20J

And after creating a simple "blinky" project, I used a 'scope to watch the pins go up and down as expected. However, they didn't. I loaded a binary that I knew worked to confirm the chip itself is working, and that made the pins go up and down, so I know it's not the chip. I traced it down to BOARD_InitBootPins() in pin_mux.c and found that it's not calling BOARD_InitLEDsPins() which initializes the hardware for output. When I updated the function manually to call InitLEDs, it works. My question is: why isn't BOARD_InitLEDsPins() called automatically by the SDK? Shouldn't the "Pins" portion of the IDE add that when triggered? Yes, I selected "Update Code."

Thanks!

Re: BOARD_InitLEDSPins() isn't being called

Pavel_Hernandez — Thu, 24 Nov 2022 01:55:25 GMT

Hello,

I review the example in the SDK but unfortunately, I cannot find the function you mentioned, even if I add another GPIO, could you update your SDK, please?

Best regards,
Pavel

Re: BOARD_InitLEDSPins() isn't being called

aaronm — Thu, 24 Nov 2022 05:25:39 GMT

Hey, Pavel, I'm not using a development board: I'm using an individual chip. And for that particular chip, here's the SDK builder page, which it shows stops at v2.9.0. Am I missing something? Thanks, Aaron

Re: BOARD_InitLEDSPins() isn't being called

Pavel_Hernandez — Fri, 25 Nov 2022 00:51:25 GMT

Hello,

Thanks for being clear, I downloaded the same SDK and do the test, and have the same result as you mentioned, I will do a report on the Config Tool.

Best regards,
Pavel

Re: BOARD_InitLEDSPins() isn't being called

ErichStyger — Fri, 25 Nov 2022 04:47:07 GMT

Just my 1 cent on this:

to my understanding, it calls board specific things like LEDs/Sensors only if the SDK/Config tools knows it is a board with known components. If you use just a device or chip without SDK for a specific board, it won't call things like initializing the LEDs, because it is unknown if they exist.

Instead manually calling it, you have to enable it here:

I hope this helps,

Erich

Re: BOARD_InitLEDSPins() isn't being called

aaronm — Fri, 25 Nov 2022 05:21:38 GMT

Oh! That's new to me, but that's just the thing. Thanks, Erich!

Re: BOARD_InitLEDSPins() isn't being called

ErichStyger — Fri, 25 Nov 2022 06:24:35 GMT

Yes, NXP changed that some time ago, and I was not aware of it too, so got trapped by it.

Previously, the 'only device no board' SDK came without any pre-pin assignments and even without examples. Now it they come with the examples (which is a good thing!) but as well with 'board pin assignments' which can be confusing. As for myself, the first thing I do if I create a project for my own board, I get rid of all the pre-pin muxing/assignements, as they only clutter my projects, as my boards are different anyway.