SchedulerSemaphore.ino

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#include <Scheduler.h>
#include <Scheduler/Semaphore.h>

// Check for SparkFun SAMD21 Breakout
#if defined(ARDUINO_ARCH_SAMD) && (USB_PID == 0x8D21)
#define Serial SerialUSB
#endif

Semaphore mutex;

void setup()
{
  Serial.begin(57600);
  while (!Serial);
  Serial.println(F("SchedulerSemaphore: started"));
  Scheduler.startLoop(loop1);
}

void loop()
{
  static unsigned int i = 1;
  unsigned long start, stop, ms;

  start = millis();
  mutex.wait();
  {
    stop = millis();
    ms = stop - start;
    Serial.print(stop);
    Serial.print(F(":loop::i="));
    Serial.print(i);
    Serial.print(F(", wait="));
    Serial.println(ms);
    Serial.flush();
    delay(100);
  }
  mutex.signal();
  delay(random(300));
  i += 1;
}

void loop1()
{
  mutex.wait();
  {
    Serial.print(millis());
    Serial.println(F(":loop1::step-1"));
    delay(random(100));

    Serial.print(millis());
    Serial.println(F(":loop1::step-2"));
    delay(random(100));

    Serial.print(millis());
    Serial.println(F(":loop1::step-3"));
    Serial.flush();
    delay(random(100));
  }
  mutex.signal();
}