CEB Press Control Code v19.01

https://github.com/OpenSourceEcology/OSE_CEB_Press_v19.01

Notes

Nonselection Procedure

• We are using a four position switch for 1/4, 1/2, 3/4, and full bricks
• Switch has positions 0-4 - or 5 total
• The switch happens to have an off position (0) which does not make any connections
• We can use the non-selection condition to do a fifth pseudo-selection - the reset procedure
• Code is if (quarterSelected() == false && halfSelected == false && threequarterSelected == false && fullSelected == false ) {}
• Testing this:

Cylinder Bounce Code Simulation

To test solenoids sensing pressure and reversing solenoids upon pressure trigger, ma nually simulated logic is the following. This simulates a cylinder bouncing between full retraction and full extension, which are both high pressure trigger points.

• Turn solenoid UP on - while pressure low
• Turn solenoid UP off - as soon as pressure triggers, and move solenoid Down.
• Trigger is done manually simply by switching pin 13 on (touching jumper from ground to 13)
• The opposite action occurs until the pressure is triggered again. Length of pressure trigger doesn't matter.
• If the pressure trigger is longer that 2 seconds, then we don't know where in the program loop we are and either UP or DOWN will occur
• In real life, the solenoid should be off momentarily, and next step should follow immediately

Code:

//defines to make it easier for non-coders to make adjustments for troubleshooting and custom changes

//defines to make it easier for non-coders to make adjustments for troubleshooting and custom changes

1. define SOLENOID_UP 4 //Extension. See pin mapping above.
2. define SOLENOID_DOWN 5 //swap these pin numbers for wire inversion
3. define SOLENOID_LEFT 6 //Extension.
4. define SOLENOID_RIGHT 7 //swap these pin numbers for wire inversion

1. define PRESSURE_SENSOR 13 //Needs pins adjacent so only 1 dupont connector is used
2. define SELECTOR_RESET 12 //Activated when nothing is selected.
3. define SELECTOR_QUARTER 11 //Reset is the shutdown/initialization procedure. All procedures are selected by
4. define SELECTOR_HALF 10 //the WHILE function. QUARTER to FULL refers to brick thickness.
5. define SELECTOR_THREEQUARTER 9 //Secondary cylinder timing is measured only.
6. define SELECTOR_FULL 8 //Primary cylinder thickness setting is based on secondary cylinder motion.

1. define PRESSURE_SENSOR_DEBOUNCE 20 //milliseconds to delay for pressure sensor debounce
2. define DELAY 500 // 1/2 sec extra to compress brick via main Cyl (default 500ms)

                                       //custom function declarations

bool lowPressure(); //function to read pressure sensor bool resetSelected(); // //bool quarterSelected(); // bool halfSelected(); // bool threequarterSelected(); // bool fullSelected(); //

                                       //Global variables

unsigned long drawerExtTime = 0; //Time measurement for calibrating motion. unsigned long previousMillis = 0; //time measurement for expansion

void setup() {

 //initialize pin I/O Inputs and turn everything off to avoid startup glitches

 pinMode(PRESSURE_SENSOR, INPUT_PULLUP);
 pinMode(SELECTOR_HALF, INPUT_PULLUP);
 pinMode(SELECTOR_THREEQUARTER, INPUT_PULLUP);
 pinMode(SELECTOR_FULL, INPUT_PULLUP);
 pinMode(SOLENOID_RIGHT, OUTPUT);
 digitalWrite(SOLENOID_RIGHT, LOW);
 pinMode(SOLENOID_LEFT, OUTPUT);
 digitalWrite(SOLENOID_LEFT, LOW);
 pinMode(SOLENOID_DOWN, OUTPUT);
 digitalWrite(SOLENOID_DOWN, LOW);
 pinMode(SOLENOID_UP, OUTPUT);
 digitalWrite(SOLENOID_UP, LOW);

}

void loop() {

while (lowPressure() == true) { //goes only up to trigger of pressure, no matter how long pressure trigger is

   digitalWrite(SOLENOID_UP, HIGH);

}

   digitalWrite(SOLENOID_UP, LOW);              //                     
   delay(2000);                                  //gives time to release trigger (momentary switch should be used to make this easier)

while (lowPressure() == true) { //moves in reverse direction until next trigger

   digitalWrite(SOLENOID_DOWN, HIGH);

}

   digitalWrite(SOLENOID_DOWN, LOW);            //moves on to next step, next step should continue until next trigger                      
   delay(2000);                                                

} //reads pressure sensor state HIGH is false and LOW is true

                                                //End of Loop

bool lowPressure() { //custom function definitions

 if (digitalRead(PRESSURE_SENSOR) == HIGH) {
   delay(PRESSURE_SENSOR_DEBOUNCE);
   if (digitalRead(PRESSURE_SENSOR) == HIGH) {
     return true;
   }
   else {
     return false;
   }
 }
 else {
   return false;
 }}

 //reads selector  - HIGH is false, LOW is true- SELECTOR_RESET, SELECTOR_QUARTER, SELECTOR_HALF, SELECTOR_3QUARTERS, SELECTOR_FULL,
 bool resetSelected() {
   if (threequarterSelected() == false && halfSelected() == false && fullSelected() == false) {
     return true;
   }
   else {
     return false;
   }}

 bool halfSelected() {
 if (digitalRead(SELECTOR_HALF) == HIGH) {
   delay(PRESSURE_SENSOR_DEBOUNCE);
   if (digitalRead(SELECTOR_HALF) == HIGH) {
     return false;
   }
   else {
     return true;
   }
 }
 else {
   return true;
 }}

 bool threequarterSelected() {
 if (digitalRead(SELECTOR_THREEQUARTER) == HIGH) {
   delay(PRESSURE_SENSOR_DEBOUNCE);
   if (digitalRead(SELECTOR_THREEQUARTER) == HIGH) {
     return false;
   }
   else {
     return true;
   }
 }
 else {
   return true;
 }}

   bool fullSelected() {
 if (digitalRead(SELECTOR_FULL) == HIGH) {
   delay(PRESSURE_SENSOR_DEBOUNCE);
   if (digitalRead(SELECTOR_FULL) == HIGH) {
     return false;
   }
   else {
     return true;
   }
 }
 else {
   return true;
 }}