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+# OpenIPC Wiki
+[Table of Content](../README.md)
+
+SigmaStar SoC research and debugging notes
+------------------------------------------
+
+#### Control PWM channels on SigmaStar SSC338Q
+
+Switch GPIO1 to PWM1 mode and set parameters
+```
+devmem 0x1F207994 16 0x1121 
+echo 1 > /sys/class/pwm/pwmchip0/export
+echo 10000 > /sys/class/pwm/pwmchip0/pwm1/period
+echo 25 > /sys/class/pwm/pwmchip0/pwm1/duty_cycle
+echo 1 > /sys/class/pwm/pwmchip0/pwm1/enable
+```