Merge pull request #483 from leonardocavagnis/fix_analogwrite_dc

leonardocavagnis · web-flow · commit 38bbdb5e35dc · 2025-08-01T13:11:21.000+02:00
AnalogWrite: fix DC calculation
diff --git a/cores/arduino/analog.cpp b/cores/arduino/analog.cpp
@@ -814,7 +814,7 @@ void analogWrite(pin_size_t pinNumber, int value)
   }
 
   if(ptr != nullptr) {
-    ptr->pulse_perc((float)value * 100.0 / (1 << _writeResolution));
+    ptr->pulse_perc((float)value * 100.0 / ((1 << _writeResolution) - 1));
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -814,7 +814,7 @@ void analogWrite(pin_size_t pinNumber, int value)`
`814`	`814`	`}`
`815`	`815`
`816`	`816`	`if(ptr != nullptr) {`
`817`		`- ptr->pulse_perc((float)value * 100.0 / (1 << _writeResolution));`
	`817`	`+ ptr->pulse_perc((float)value * 100.0 / ((1 << _writeResolution) - 1));`
`818`	`818`	`}`
`819`	`819`	`}`
`820`	`820`