topic Re: How to enable GPIOs which are DISABLED after reset in Kinetis Microcontrollers

How to enable GPIOs which are DISABLED after reset

VictorLorenzo — Tue, 26 Mar 2019 10:28:16 GMT

Hi,

I'm creating a project with the MKE04Z64VLD4 microcontroller with MCEXpresso (v10.3.1 [Build 2233]) and its built-in Pins and Clocks tools. I've downloaded the MCUXpresso SDK (2.5.0) from nxp using MCUXpresso SDK Builder.

Problem is I try to use pins 36, 37 (PTC7,PTC6) as GPIO outputs but writing to them has no effect on the pin.

The BOARD_InitPins() function created by the Pins tool includes calls to GPIO_PinInit() for each pin, but calls to GPIO_PinWrite() seem not having effects on the output.

Is there any other step required for using those pins?

Victor

Re: How to enable GPIOs which are DISABLED after reset

mjbcswitzerland — Tue, 26 Mar 2019 14:56:18 GMT

Hi Victor

There is nothing special to be done (apart from avoiding enabling peripheral functions on pins you want to use as GPIO).
If you continue to have problems try the uTasker open source project at https://github.com/uTasker/uTasker-Kinetis since it supports your device and has chip simulation which increases efficiency over generation tools and guessing whether they are correct or not.

Regards

Mark

Complete Kinetis solutions, training and support:http://www.utasker.com/kinetis.html
Kinetis KE:
- http://www.utasker.com/kinetis/FRDM-KE02Z.html
- http://www.utasker.com/kinetis/FRDM-KE02Z40M.html
- http://www.utasker.com/kinetis/FRDM-KE04Z.html
- http://www.utasker.com/kinetis/FRDM-KE06Z.html
- http://www.utasker.com/kinetis/FRDM-KE15Z.html

Re: How to enable GPIOs which are DISABLED after reset

VictorLorenzo — Mon, 01 Apr 2019 08:01:03 GMT

Hi Mark, thanks for your time and response.

I've tried uTasker as you suggested, but I couldn't manage to make it compile, it had too many things to adjust and modify, so I started again from the very beginning.

Anyway, "haste is a waste", cause is I did not pay attention to schematic drawings.

Regards, Victor

Re: How to enable GPIOs which are DISABLED after reset

Sabina_Bruce — Thu, 04 Apr 2019 18:19:03 GMT

Hi Victor,

Could you verify if your program includes the BOARD_InitDebugConsole(); in the main.

Let me know,

Sabina

Re: How to enable GPIOs which are DISABLED after reset

VictorLorenzo — Sun, 12 Apr 2020 19:02:13 GMT

Hi Sabina,

No need to check BOARD_InitDebugConsole(). The answer was in my previous response.

Regards,