I already have working RPM meter for car. I would like to count total counts of shaft rotation also, and if is possible to save to EEPROM for example every 5 minutes. And when alduino restarts, I want to start counting from last saved number.
Thanks in advance!
/* 7.5 dodan array za temperaturo
* 7.4 spremenjen map za temperaturo na -13 prej -20
* 7.3 dodan beep pri inicializaciji oz. pri welcome screenu
*
* proba z digital inputom na pin 12 za ventilator
*/
// ver 7.5 arrayi
volatile float time = 0;
volatile float time_last = 0;
volatile int rpm_array[5] = {0,0,0,0,0};
volatile byte rpmcount;
unsigned int rpm;
unsigned long timeold;
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
//LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
//LiquidCrystal lcd(10, 9, 5, 4, 3, 2);
LiquidCrystal lcd(10, 9, 7, 6, 5, 4);
void rpm_fun()
{
time = (micros() - time_last);
time_last = micros();
}
void setup()
{
Serial.begin(9600);
lcd.begin(16, 4); // intialise the LCD
//Interrupt 0 is digital pin 2, so that is where the IR detector is connected
//Triggers on FALLING (change from HIGH to LOW)
attachInterrupt(0, rpm_fun, RISING);
rpmcount = 0;
rpm = 0;
timeold = 0;
}
void loop(){
detachInterrupt(0);
//dodano za array 7.5
//5 Sample Moving Average To Smooth Out The Data
rpm_array[0] = rpm_array[1];
rpm_array[1] = rpm_array[2];
rpm_array[2] = rpm_array[3];
rpm_array[3] = rpm_array[4];
rpm_array[4] = 60*(1000000/(time*1));
//Last 5 Average RPM Counts Eqauls....
rpm = (rpm_array[0] + rpm_array[1] + rpm_array[2] + rpm_array[3] + rpm_array[4]) / 5;
timeold = millis();
rpmcount = 0;
lcd.setCursor(0, 0);
lcd.print(rpm);
lcd.print(" Obrati m.:");
// lcd.setCursor(0, 1);
// percent = map(rpm, 0, 3500, 0, 100);
//Restart the interrupt processing
attachInterrupt(0, rpm_fun, RISING);
}
