From 48bb7b2acccdc609c9f858dfbc433fa6cec22fd3 Mon Sep 17 00:00:00 2001
From: Signor Pellegrino <68112357+FlyRouter@users.noreply.github.com>
Date: Tue, 6 Feb 2024 11:00:22 +0300
Subject: [PATCH] Create sigmastar-research.md

---
 en/sigmastar-research.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 en/sigmastar-research.md

diff --git a/en/sigmastar-research.md b/en/sigmastar-research.md
new file mode 100644
index 0000000..366a0bd
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+++ b/en/sigmastar-research.md
@@ -0,0 +1,16 @@
+# 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
+```