AXIOMTEK SCM186 User Manual page 43

3.5.1.13 PWN FAN
Herodotus supports pwm fan connector using typical 4 pin fan. This section explains how to
control pwm fan.
Please follow below commands to execute pwm fan.
⚫ To change directory to pwm chip path, execute the below command.
sh-5.1# cd /sys/class/pwm/pwmchip1
⚫ To export and enable pwm control configuration, execute the below command.
sh-5.1# echo 0 > export
sh-5.1# echo 1 > pwm0/enable
⚫ To set pwm parameters period and duty cycle, execute the below command.
sh-5.1# echo <period> > pwm0/period
sh-5.1# echo <duty_cycle> > pwm0/duty_cycle
⚫ To unexport and disable pwm control, execute the below command.
sh-5.1# echo 0 > pwm0/enable
sh-5.1# echo 0 > unexport
Herodotus BSP User Guide
SCM186 NXP i.MX 8M Plus ARM-based Evaluation Kit
FAN
37