i.MX ProcessorsのトピックRe: SAI5_RXD3 AS GPIO3_IO24

SAI5_RXD3 AS GPIO3_IO24

VinithNama — Mon, 30 Aug 2021 12:28:17 GMT

Hi sir,

We are trying to configure the SAI5 pins which are available on EXP CN, we have made the following configuration.

1.Updated the mux value in imx8mm-pinfunc.h

2.Added in the imx8mm-evk.dts by selecting the pad register values.

When we are exporting the gpio from kernel space to user space and trying to make SAI5 pins high and low, the voltage of the SAI5 pins is in ideal condition(1.5).

At the same time, we have verified with the EXP_IO pins on the EXP CN connector and on board GPIO pin(GPIO1_IO13), we are using the formulae for calculating and exporting the gpio is (GPIO PAD - 1)*32+pin number. and we can make the pin high and low and confirmed using multimeter.

Can you please guide us any other configuration we are missing?

Thanks & Regards,

Vinith.

Re: SAI5_RXD3 AS GPIO3_IO24

igorpadykov — Tue, 31 Aug 2021 06:15:47 GMT

Hi Vinith

one can look at below gpio tutorial

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/How-to-use-gpio-hog-demo/ta-p/1317709

Best regards
igor

Re: SAI5_RXD3 AS GPIO3_IO24

VinithNama — Tue, 31 Aug 2021 09:17:48 GMT

Hi Sir,

I have tried your solution provided, getting the same value. Any alternate solution so please provide.