GPIO driver Port Read

imxrtuser — Tue, 28 Jan 2020 13:22:47 GMT

Hello,

is there a specific reason to why there is no function for reading multiple GPIO pins at once in the GPIO driver fsl_gpio.c/h? There are functions to set and clear multiple pins at once but no function for reading.

In general I think that Scott Millers post from almost one year ago (which also mentioned the GPIO read function which is still missing) is still valid. The documentation is missing a lot of information, links don't work and there is no way to see from the open online API to which processor it refers. As a newcomer to the NXP IMXRT family it is difficult to get started with the processor family and the API. I have to switch between API, MCU Reference Manual and source code quite a lot to understand what is going on and what the correct parameters are. Yes, there are a lot of working code examples for the peripherals which you can create with MCUXpresso Config Tools but they don't show everything.

Kind regards,

Stefan

Re: GPIO driver Port Read

victorjimenez — Fri, 31 Jan 2020 18:04:57 GMT

Hello Stefan,

In the i.MXRT the concept of Port doesn't exist, like in Kinetis or LPC. Therefore when you want to read a GPIO you need to read a specific PAD. The GPIO module of the RTs was inherited from the i.MX.

Have a great day,
Victor

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