---------- Forwarded message ---------
From: Mani Sadhasivam <manivannanece23@...>
Date: Tue, 5 Mar, 2019, 12:11 AM
Subject: Re: [Zephyr-users] 96Boards GPIO standard names?
To: Lawrence King <lawrence.king@...>

Hi Lawrence, 

On Mon, 4 Mar, 2019, 10:43 PM Lawrence King <lawrence.king@... wrote:

I have been writing code for a peripheral board that plugs into a Nitrogen or any other 96Boards compliant board (with 40-pin Low Speed connector) running Zephyr. I was trying to code use of the GPIOs in a way that would work for all compliant boards without adding custom definitions.

 

The 96Boards IOT specification nicely describes the I/O connector and the features on the connector. For example GPIO-A is on Pin 23 of the connector. Unfortunately each board uses different chipset GPIOs to drive the pin on the connector. If I had a symbolic name for the connector GPIO pin (for example GPIO_96B_A_CONTROLLER and GPIO_96B_A_PIN) that mapped to the chipset GPIIO pin,  then my code would work (after  recompile with the appropriate BOARD=96B_xxx) across all of the compliant boards with no change to the source code.

 

Right now with the Nitrogen board I have created a set of defines based on reading the schematic, but of course these will not work with the next chip I use I will have to wrap the defines with #if BOARD==96B_xxx .

 

It is possible that you already have these definitions, but I didn’t manage to find them.

I know that there is a similar implementation done for arduino connector and we need to come up with something similar for 96Boards connectors (refer nucleo_f401re board). This came up before as well as we have several mezzanines also supported in Zephyr.

I will create a github issue for tracking this and we'll continue logging the progress.

Thanks, 

Mani

 

I realize that Zephyr supports many boards with many form factors and this would only solve the issue for a few boards.

 

Lawrence King

Principal Developer

Connected Transport Market Unit

https://www.Irdeto.com

+1(416)627-7302

 

          

            

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