SAI5_RXD3 AS GPIO3_IO24

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SAI5_RXD3 AS GPIO3_IO24

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VinithNama
Contributor III
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.

  

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2 Replies

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igorpadykov
NXP Employee
NXP Employee

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

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902 Views
VinithNama
Contributor III

Hi Sir,

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

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