OpenglMan Posted October 24, 2017 Share Posted October 24, 2017 Hello, I get an error when i try to use the PH5 pin as digital output. PH5 is the number 229 according to the following equation: (8-1)*32+5 = 229 echo 229 > /sys/class/gpio/export -bash: echo: write error: Device or resource busy If i use other pins like PH13, PH19, PH20 or PH21, all work correctly. For example, for PH13 as digital output: echo 237 > /sys/class/gpio/export echo "out" > /sys/class/gpio/gpio237/direction echo "1" > /sys/class/gpio/gpio237/value echo "0" > /sys/class/gpio/gpio237/value echo 237 > /sys/class/gpio/unexport I get the same error in the Cubieboard2 and the Lime A20 board. Can someone help me ? Thanks in advance Link to comment Share on other sites More sharing options...
martinayotte Posted October 24, 2017 Share Posted October 24, 2017 Probably on most boards, PH5 is USB0-VBUSDET, at least on Olimex ones. Link to comment Share on other sites More sharing options...
OpenglMan Posted October 24, 2017 Author Share Posted October 24, 2017 Thanks martinayotte for your answer. Yes, It seems this pin is being used. I will use another pin. Thanks anyway Link to comment Share on other sites More sharing options...
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