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Copy pathBlink_LED_Freq_DutyCycle.ino
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Blink_LED_Freq_DutyCycle.ino
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// Vyankatesh Ashtekar
// Blink LED with required frequency and duty cycle
// One can blink multiple LEDs together. Make new functions by renaming the variable "lastRisingEdgeTime2" to "lastRisingEdgeTimeN" for N LEDs
// Non-blocking code
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
blinkLED1wFreq(1, 50, LED_BUILTIN);
}
void blinkLED1wFreq(float freq, float dutyCyclePercent, int pinNo) {
if (freq < 1e-6)
freq = 0.1;
float timePeriod = (1 / freq) * 1000; // convert to milliseconds
float onPeriod = dutyCyclePercent * timePeriod / 100;
static unsigned long lastRisingEdgeTime;
if (millis() - lastRisingEdgeTime >= onPeriod) {
digitalWrite(pinNo, 0);
}
if (millis() - lastRisingEdgeTime >= timePeriod) {
digitalWrite(pinNo, 1);
lastRisingEdgeTime += timePeriod;
}
}
void blinkLED2wFreq(float freq, float dutyCyclePercent, int pinNo) {
if (freq < 1e-6)
freq = 0.1;
float timePeriod = (1 / freq) * 1000; // convert to milliseconds
float onPeriod = dutyCyclePercent * timePeriod / 100;
static unsigned long lastRisingEdgeTime2;
if (millis() - lastRisingEdgeTime2 >= onPeriod) {
digitalWrite(pinNo, 0);
}
if (millis() - lastRisingEdgeTime2 >= timePeriod) {
digitalWrite(pinNo, 1);
lastRisingEdgeTime2 += timePeriod;
}
}