topic Re: Find GPIO Pin Memory Address in i.MX Processors

Find GPIO Pin Memory Address

Nirjul_Patel — Thu, 17 Feb 2022 10:45:37 GMT

Hello,

I Want to Particular GPIO Pin Memory Address And I Want To GPIO Pin UP And Down using A Memory Address

So, How Can Find Particular GPIO Pin Memory Address?

I try Port_base_Address + Off set Address But This Address use I Can Not Control Pin
So, Please Explain Me Process

Re: Find GPIO Pin Memory Address

Yuri — Thu, 17 Feb 2022 11:27:23 GMT

@Nirjul_Patel
Hello,

what is part number of the device (of i.MX series), used in Your applications?

Regards,
Yuri.

Re: Find GPIO Pin Memory Address

Nirjul_Patel — Thu, 17 Feb 2022 11:31:00 GMT

@Yuri

Hello ,

Thanks For Your Quickly Support,
But I Don't Know Part Number, I Used iMX8M Mini

Re: Find GPIO Pin Memory Address

Yuri — Fri, 18 Feb 2022 04:10:19 GMT

@Nirjul_Patel
Hello,

Generally Chapter 8 (Chip IO and Pinmux) of the i.MX8Mm RM
describes pins settings and provides corresponding address area.

https://www.nxp.com/webapp/Download?colCode=IMX8MMRM

In particular, use section 8.3.3 (GPIO Memory Map/Register Definition).
Note: to use GPIO mode pins should be configured with IOMUXC help.
Section 8.2 [IOMUX Controller (IOMUXC)] explains possible options.

Also, if some pins are used in Linux - they should not be removed from
the device tree.

Regards,
Yuri.