I have write code for my project in that code operate GPIO 44, High-Low operation.
When I restart pocket beaglebone and execute code GPIO 44 Voltage level remaining 1.7V (Not operate properly).
Then stop execution and again execute code GPIO 44 Voltage level 3.3V and 0 V operate properly.
What is issue with GPIO44 on every restart it’s not giving High-Low operation properly.
Debian Version 9.2.
More info for better understanding.
Debian version : 9.2,
Pocket beaglebone : Rev A2
Compiler : arm-cortexa8-linux-gnueabihf
GPIO 44 value not changing for the first time execution I have checked with multimeter.
GPIO 44 value changes properly when I stop Execution and run it for second time.
Screen shot for executing code for first and second time:
There is no error first and second time displayed.
Code Snippet where I operate GPIO:
/*******************************************************************************
* Function Name: gpio_export
Since you use the /sys filesystem, you can play with it from the command prompt. What happens when you reboot and do the sequence
echo 44 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio44/direction
echo 1 > /sys/class/gpio/gpio44/value
Does it still not work for the first time?
That’s how I would debug this : find a reliable mode of operation by playing with shell scripts and then implent it in C.