AnsweredAssumed Answered

Configure GPIO in iMX6UL-EVK

Question asked by Dao Van Toan on Sep 12, 2019
Latest reply on Sep 15, 2019 by Yuri Muhin

Hi NXP,

My name is Toan. And I'm using iMX6UL-EVK. Currently, I'm trying to configure GPIO and get a trouble. In schematic, I see that pin D2 is usable as GPIO and find out number of pin. And I found that pin is gpio1.IO[25]. Because It's belong to GPIO1 so I don't need to plus with any value. Then I executed: 

$ echo 25 > /sys/class/gpio/export

$ echo "out" > /sys/class/gpio/gpio25/direction

$ echo 1 > /sys/class/gpio/gpio25/value

Then I test with a LED  but the light is quite weak. Then I try to set: 

echo 0 > /sys/class/gpio/gpio25/value

But the LED is still lighting. 

I tried to test with 3.3V power in this board, LED is light very strong. 

 

What should I do now ? Do I do wrong somewhere ?

 

Thank you so much,

      Toan

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