Cannot set GPIO state with 'gpio_direction_output'

Axent — Sun, 26 Mar 2023 11:49:20 GMT

Hello. I try to init GPIO in 'legacy' approach through GPIO number request.
I have the simple code:

//BASE for GPIO2 is : 448 //GPIO2_04 is : 448+4 = 452 gnum = gpio_request(452, "pin2"); if(gnum < 0) return -1; //Configure as output and set HIGH level gnum = gpio_direction_output(452, 1); //doesnt work. always 0 at output if(gnum < 0) return -2;

All functions return with OK.
But.. when I touch my oscilloscope I see low-level at the line
Command promt:
cat /sys/kernel/debug/gpio shows me also - "out lo" (I m expecting "out hi")

Alsi I tried to read GPDAT register from memory. And this also shows me zero value in output.

What is going wrong? I cannot to set 'HIGH' level for any pin from GPIO2 block.
Thanks

Re: Cannot set GPIO state with 'gpio_direction_output'

June_Lu — Mon, 27 Mar 2023 01:00:21 GMT

Please share the MPU and SDK information

topic Re: Cannot set GPIO state with 'gpio_direction_output' in Layerscape

Cannot set GPIO state with 'gpio_direction_output'

Re: Cannot set GPIO state with 'gpio_direction_output'