arduino state machine code examples - Making Things Interactive

Recommendations

Info

currentState has an unrecognized value! Danger! // print an error Serial.print("BAD STATE: "); Serial.println(currentState); // Now, what should we do? go back to off? same? My personal // preference is to go back to the start state, in this case, off. // // if we were using a momentary switch to start things, we'd have // to push the momentary switch again to start the sensor. If // we're using an on/off switch, the state machine will start up // again if the switch is still in the on position. currentState = sOff;}}void SetState(){// read our photosensor and see if it's darker, lighter,// or the same, then set the state accordingly.// we use a "noise" factor when making our calculation so that minor// fluctuations in the signal do not cause the state machine to change// state.int val = analogRead(photoPin);Serial.print(currentValue);Serial.print(" ");Serial.println(val);if ((val -noise) > currentValue) {currentValue = val;currentState = sBrighter;}else if ((val + noise) < currentValue) {currentValue = val;currentState = sDarker;}else {currentState = sSame;}}void LightSameLed(){
}PulseLed(redLed);void LightBrighterLed(){PulseLed(blueLed);}void LightDarkerLed(){PulseLed(greenLed);}void PulseLed(int pin) {for (int i=0; i0; i--) { analogWrite(pin, i); delay(1);}}void BlinkStatusLed(){digitalWrite(statusLed,HIGH);delay(100);digitalWrite(statusLed,LOW);;delay(100);}State machine for switching LEDs with a switch// our states. We could do these with #defines once we've learned// them "static" means this variable's value cannot be changed once// it's set, it's a good way to prevent yourself from accidentally// changing the value in your code.static int sOff = 0;static int sRed = 1;static int sBlue = 2;static int sGreen = 3;// the current state we're in at any given time. We want to start in// "off", so we set the variable to sOff when we declare it.int currentState = sOff;// we need to have somewhere to go when we start, so let's pick redint nextState = sRed;
Page 1 and 2: State machine for detecting light c
Page 3: for (int i = 0; i < numReads; i++)
Page 7 and 8: }// only if the switch is turned on

arduino state machine code examples - Making Things Interactive

Create successful ePaper yourself

Delete template?

Save as template?