analogWrite: delete pwm object if duty < 0

facchinm · facchinm · commit 1efbfac0e57c · 2020-10-26T17:53:16.000+01:00
Porting of arduino/ArduinoCore-nRF528x-mbedos#105, simplified
diff --git a/cores/arduino/wiring_analog.cpp b/cores/arduino/wiring_analog.cpp
@@ -73,7 +73,12 @@ void analogWrite(pin_size_t pin, int val)
     digitalPinToPwm(pin) = pwm;
     pwm->period_ms(2); //500Hz
   }
-  pwm->write(percent);
+  if (percent < 0) {
+    delete pwm;
+    digitalPinToPwm(pin) = NULL;
+  } else {
+    pwm->write(percent);
+  }
 }
 
 void analogWriteResolution(int bits)

Original file line number	Diff line number	Diff line change
`@@ -73,7 +73,12 @@ void analogWrite(pin_size_t pin, int val)`
`73`	`73`	`digitalPinToPwm(pin) = pwm;`
`74`	`74`	`pwm->period_ms(2); //500Hz`
`75`	`75`	`}`
`76`		`- pwm->write(percent);`
	`76`	`+ if (percent < 0) {`
	`77`	`+ delete pwm;`
	`78`	`+ digitalPinToPwm(pin) = NULL;`
	`79`	`+ } else {`
	`80`	`+ pwm->write(percent);`
	`81`	`+ }`
`77`	`82`	`}`
`78`	`83`
`79`	`84`	`void analogWriteResolution(int bits)`