![]() Ya, i have used the millis function for my task. Serial.println("switch2 was pressed within 10 secs of switch1") If (switch2IsPressed != Switch2WasPressed If (switch1IsPressed != Switch1WasPressed Once switch1 is turned on(interrupt), the arduino should start a timer for 10 secs (example), and if within that particular time, if another switch2 (non interrupt) is pressed, i want to record that " another switch2 was pressed within 10 secs of time after the interrupt was triggered" const byte Switch1Pin = 4 īoolean switch1IsPressed = digitalRead(Switch1Pin) = LOW īoolean switch2IsPressed = digitalRead(Switch1Pin) = LOW If you want the interrupts to be regular then you'll have to calculate. So for every 1ms interrupt you have to update the OCRA register to a new time so it fires at 1ms then 2ms then 3ms then 4ms. The fan starts but it never switches off. The problem: The analog comparator interrupt routine works fine but the timer interrupt isnt. Check that L has gone OFF after 10 sec counted from the the instant of pressing SW1. In order to set two interrupts on that timer and have one be at 10ms, then you have to let the timer run all the way to 10ms. The reason for doing it this way is so that the fan remains on while the temperature is high because the analog comparator keeps tripping and resetting the timer variable. Timer1 (16 bits) is used for functions like delay() and millis() and for PWM output on pins 5 and 6. Check that the following message has appeared on Serial Monitor. Arduino is using all three timers in ATMega328. And this discussion is about using them for timing purposes. The compare channel A/B interrupts are unused. The overflow interrupt is already being used by the timing functions millis () and micros (), as shown earlier. Check that L (built-in LED of UNO Board) is ON for 10 secs.ħ. Timer0 has three interrupts associated with it: overflow and compare channel A and channel B. TCNT1 = 49911 //reload 1-sec time delay parameterģ. ![]() ISR(TIMER1_OVF_vect) //counting 1-sec Time Tick up to 10 for 10-sec time delay TCNT1 = 49911 //reload 1-sec tim delay parameter If (digitalRead(8) = LOW)//check Sw2 for closure While(flag2 != true) //10-sec has not gone If (flag1 = true) //External interrupt on DPin-2 has occued Some functions will not work while interrupts are disabled, and incoming communication may be ignored. Interrupts allow certain important tasks to happen in the background and are enabled by default. TIMSK1 |= (1<<TOIE1) //TC1 overflow interrupt is enabledĪttachInterrupt(digitalPinToInterrupt(2), ISRINTZ, LOW) Re-enables interrupts (after they’ve been disabled by noInterrupts (). ![]() These Hardware Timers, using Interrupt, still work even if other functions are blocking. Hope you will follow this tutorial to see the physical implementation of your idea:Ģ. This library enables you to use Interrupt from Hardware Timers on supported Arduino boards such as AVR, Mega-AVR, ESP8266, ESP32, SAMD, SAM DUE, nRF52, STM32F/L/H/G/WB/MP1, Teensy, Nano-33-BLE, RP2040-based boards, etc. What i want to implement is that, once switch1 is turned on(interrupt), the arduino should start a timer for 10 secs (example), and if within that particular time, if another switch2 (non interrupt) is pressed, i want to record that " another switch2 was pressed within 10 secs of time after the interrupt was triggered"
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