Hello, i am working on Apalis TK1 I have a qt application however it can not read pwm3
Error while opening the file.|filePath: "/sys/class/pwm/pwmchip0/pwm3/enable" Error while opening the file.|ffilePath: "/sys/class/pwm/pwmchip0/pwm3/period" Error while opening the file.|filePath: "/sys/class/pwm/pwmchip0/pwm3/duty_cycle"
If i try to enable pwm3
# echo 3 >export sh: write error: Device or resource busy
i get this error. How can i solve it thank you