Good Afternoon all.
Ive created an project based on the Timer1. I do have a poblem where the code for some reason lag the processor and the response to the input 12 seems to take few good seconds to update the state. Unfortunetly i never worked with the PWM library therefore im not so sure if this is cause by my hardware or maybe someone else is able to spot an error in my code please?
MC-2100 Treadmill Motor Controller Interface
Lathe Motor Controller via PWM
Seven Segment Tachometer
ON/OFF Toggle
Joe Schoolcraft
Brian Schoolcraft
May 2013
https://sonsofinvention.wordpress.com/
*/
#include "TimerOne.h" //http://playground.arduino.cc/code/timer1
#define POT_READ A0 //Wiper of pot connected as voltage divider (Speed Command Input)
#define SPEED_SENSE 2 //connected to reed switch - magnet closes switch, pulls to ground (Spindle Speed Input - 2 pulses per rev)
#define PWM_OUT 9 //Connected to blue wire of MC2100 (50ms period PWM out)
#define PWM_CYCLE 50.0 //Output Signal PWM Period (50ms)
#define POT_DIF 4 //Change detection threshold on pot
#define MAX_DUTY 869 //Max Duty Cycle expected by MC-2100 (85% of 1023)
#define MIN_DUTY 0 //Min Duty Cycle expected by MC-2100 (0% of 1023)
int potTemp;
int potValue;
int lastPotValue;
int potCheck;
int speedLevel;
int buttonState; // the current reading from the input pin
int lastButtonState = LOW;
const int ON_OFF = 13; //on off switch input
unsigned long lastDebounceTime = 0; // the last time the output pin was toggled
unsigned long debounceDelay = 50;
byte onOffState = 0;
void setup()
{
Serial.begin(9600);
pinMode(POT_READ, INPUT);
pinMode(PWM_OUT, OUTPUT);
pinMode(ON_OFF, INPUT_PULLUP); //Enable internal pullup resistor to simplify external circuit
Timer1.initialize(PWM_CYCLE*1000); //Set pin 9 and 10 period to 50 ms
Timer1.pwm(PWM_OUT, 0); //Start PWM at 0% duty cycle
}
void loop()
{
int reading = digitalRead(ON_OFF);
if (reading != lastButtonState) {
// reset the debouncing timer
lastDebounceTime = millis();
}
if ((millis() - lastDebounceTime) > debounceDelay) {
// whatever the reading is at, it's been there for longer than the debounce
// delay, so take it as the actual current state:
// if the button state has changed:
if (reading != buttonState) {
buttonState = reading;
// only toggle the LED if the new button state is HIGH
if (buttonState == HIGH) {
onOffState = !onOffState;
}
}
}
digitalWrite(ON_OFF, onOffState);
// save the reading. Next time through the loop, it'll be the lastButtonState:
lastButtonState = reading;
//Read and condition pot value
potTemp = analogRead(POT_READ);
potCheck = abs(potTemp - potValue);
if(potCheck >= POT_DIF) { //Only accept new value if it's far enough from the current accepted value
potValue = potTemp;
}
speedLevel = map(potValue,0,1023,0,MAX_DUTY); //Convert Pot input to pwm level to send to MC-2100
Serial.println(onOffState);
if (onOffState == 0){ //Off
Timer1.setPwmDuty(PWM_OUT, 0); //Shut down MC-2100
}
if (onOffState == 1){ //ON
Timer1.setPwmDuty(PWM_OUT, speedLevel); //Send speed command to MC-2100
}
}