perhaps use a command line gpio tool to set the target pin to output and check with multimeter/oscilloscope whether this pin is still working.
pinctrl help
raspi-gpio help
pinctrl set 20 op pn dh # Set GPIO20 to output with no pull and driving high
pinctrl set 20 op pn dl
then start your pwm tool and run "pinctrl get" which hopefully displays which pins are now in usage by this tool.
wiringpi gpio numbers are somewhat special, see https://pinout.xyz/pinout/wiringpi
pinctrl help
raspi-gpio help
pinctrl set 20 op pn dh # Set GPIO20 to output with no pull and driving high
pinctrl set 20 op pn dl
then start your pwm tool and run "pinctrl get" which hopefully displays which pins are now in usage by this tool.
wiringpi gpio numbers are somewhat special, see https://pinout.xyz/pinout/wiringpi
Statistics: Posted by ghp — Thu Jul 10, 2025 12:42 pm