Questions tagged [isr]

Question 1

I've written an ISR routine using an Arduino UNO wired to my RC receiver. The receiver gets orders through the gimbals in my transmitter and executes the ISR every time the gimbals are moved. I was ...

Question 2

I have a Nano producing a PWM output from one of its pins. This PWM signal cannot stop as it drives a filament for a VFD display(if it stops, nothing shows). However, I need to capture the pulses from ...

Question 3

I'm hacking a project with ESP32-WROOM module. I'm running some timers with alarms along with some peripherals triggering ISRs. In the ISR routine I'm sending events to a queue, and receiving them in ...

Question 4

ESP32-S2 (Wemos/Lolin S2 mini) Arduino 2.1.1 on Windows 11 Hello, Thank you for taking the time to read this post and for any assistance you can provide. I consider myself a newbie when it comes to ...

Question 5

I've got an Arduino Mega periodically running an (~400ms) operation that is sensitive to repeatable timing, so I don't ever want it to be interrupted. But, I'd like to be able to use an interrupt ...

Question 6

Okay so you aren't able to pass a variable into in ISR. This is causing problems for me. I'm using a rotary encoder, and I need it to be connected to an interrupt pin and running a ISR. When using ...

Question 7

I'm trying to use a library function in my ISR function that uses the internal timer to trigger every 1 ms. The chip that I'm using is an ESP32-C3-MINI. Here is my current code: main.cpp #include <...

Question 8

I want to use interrupts on my ESP 8266 to monitor the digital outputs of a power meter and water meter. The idea is to increment a counter in the ISRs and at some point to take the value of the ...

Question 9

I want to write a class for a model bike. For controlling the steering I use a DC motor with two encoders. To get the steering angle stAng of the bike, I attach a interrupt to the pin ST_ENC_A where ...

Question 10

I'm trying to make a mildly accurate oscilloscope using Arduino Uno R3 and I've done some research on the best method to do so. First of all I need to measure the voltage with a rather high sampling ...

Question 11

I found the following code within an example for performing very fast changes on a PWM-output. It works, however I'm wondering about some details. TIMER2 was set up in setup() as follows: TCCR2A = 0; ...

Question 12

I have an accel+gyro sensor connected to an Arduino Zero. It's configured to output an interrupt signal on pin 2 when tapped. I can do a digitalRead() on the pin, and it does go high, so the interrupt ...

Question 13

Desired behaviour: Go to IDLE sleep mode. When PB2 (blue trace) goes low wake up and give a 10 ms HIGH on PB1 pulling a pull-up low (yellow trace on Figure 1). Go to 1. What I get: Figure 1. (1) ...

Question 14

My Arduino needs to do: Run ISR as many times as possible/ as fast as possible. Occasionally receive data over I2C. Output data over SPI in ISR. My question is regarding SPI and ISR. The ...

Question 15

I'm just curious as to why there are no brackets at the end of the ISR when attaching and assigning the interrupt command? attachInterrupt(digitalPinToInterrupt(interruptPin), blink, CHANGE); ... ...

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Questions tagged [isr]

Interrupt service routine calls with RC receiver

Does an ISR pause PWM?

ESP-IDF logging library slows down ISR processing

ESP32 trouble with running ledcWrite inside of ISR

Using interrupts as flags/latches without any ISR

How to get around passing a variable into an ISR

Using library functions in timer ISR ESP32

Is ESP8266 dropping an interrupt?

How do I properly use an ISR inside a class definition?

Mildly accurate oscilloscope using Arduino Uno R3

ISR for very fast processes, strange code found. Has ISR effect on timer behaviour?

Can't make attachInterrupt() work

ATtiny85 giving multiple wake from IDLE if INT0 held low

Correct usage of SPI with ISR

Why no brackets after Interrupt routine inside attachInterrupt

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