vishnumaiea / ptscheduler

Pretty tiny Scheduler or ptScheduler is an Arduino library for writing non-blocking periodic tasks easily.

vishnumaiea.github.io

ptscheduler's Issues

How to implement jitter ?

Firstly, love ptScheduler !!

I'm sending messages over serial between two Arduinos on the same schedule (say 100ms) but would like to ensure they don't all fire at the same time in a 'feast and famine' style which is hard on my receiver device.

How can I introduce a one time offset when my scheduler objects are created or similar so that i spread the load but maintain the timing of tasks ? ie: Two tasks scheduled at 100ms with a 50ms offset would result in alternating tasks triggering every 50ms.

Cheers !!

Task runs indefinitely when sequence repetition is 1

When the sequence repetition is set to 1 with the help of setSequenceRepetition() function, the task run indefinitely. The correct behavior should be the should stop after executing the sequence only once.

Arduino resetting - Looking for guidance

I'm working on an automotive project and would like to alter the frequency of my ptScheduler task (ptCalculateRpm) based on engine RPM. When I implement this as shown below the Arduino goes into a reset loop ... something is not happy.

Is this an edge case anti-pattern or am I missing something ?

The definition of the object is:
ptScheduler ptCalculateRpm = ptScheduler(PT_TIME_200MS);

The code that contains my desires is:

  if (ptCalculateRpm.call()) {
    detachInterrupt(digitalPinToInterrupt(rpmSignalPin));
    currentRpm = calculateRpm();
    attachInterrupt(digitalPinToInterrupt(rpmSignalPin), updateRpmPulse, RISING);
    // Change frequency of rpm calculation depending on RPM to avoid high error
    if (currentRpm > 1500) {
      ptCalculateRpm = ptScheduler(PT_TIME_50MS);
    } else {
      ptCalculateRpm = ptScheduler(PT_TIME_200MS);
    }
  }

Skipping iteration is not working for oneshot and spanning tasks

ptScheduler/src/ptScheduler.cpp

Line 261 in 0e61517

if ((!taskStarted) && (skipIntervalSet || skipIntervalSet || skipTimeSet)) {

The issue is obvious on this line. skipIntervalSet appears twice in the conditional statement.

how to implement 1ms and 5ms periodic tasks cooperatively and 5ms task take 2ms?