Heardbead mit PWM.h
Erzeugen eines LED Heardbeat mit Hilfe der Bibliothek PWM.h
/*
Headrbead with PWM.h
Created: 09.06.2017
Author: Ralf Bohnen - www.Arduinoclub.de
This example code is in the public domain.
*/
#include <PWM.h>
//UNO PWM PINS : 3, 5, 6, 9, 10, 11
//Read more for other boards
//https://www.arduino.cc/en/Main/Products
int frequencyOutputPin = 9;
//Heardbead Timing
const long settingStepMicrosec = 18000; //<-- play with it
volatile unsigned long nextSetPulseWidthMicrosec;
volatile int actPulseWidthPercent;
volatile bool goToZero = false;
void setup() {
//Start Serial I/O
Serial.begin(115200);
delay(500);
Serial.println("\nHeadrbead with PWM.h");
Serial.println(F("-------------------------------------------"));
//Init Timers
InitTimersSafe();
//Set Frequency to 10kHz
SetPinFrequency(frequencyOutputPin, 50);
//Set Width + to 0% LED off
actPulseWidthPercent = 0;
pwmWrite(frequencyOutputPin, actPulseWidthPercent * 2.55f);
} //end setup
void setLEDBrightness() {
if (actPulseWidthPercent == 100 && !goToZero) {
goToZero = true;
}
else {
if (actPulseWidthPercent == 0 && goToZero) {
goToZero = false;
}
}
if (goToZero) {
actPulseWidthPercent--;
} else {
actPulseWidthPercent++;
}
//Set Pulsewidth+
pwmWrite(frequencyOutputPin, actPulseWidthPercent * 2.55f);
nextSetPulseWidthMicrosec = micros() + settingStepMicrosec;
}
void loop() {
if (micros() > nextSetPulseWidthMicrosec) { setLEDBrightness(); }
//your Code .... >
} //end loop
