Interrupts allow the processor to suspend normal operation temporarily so that a high-priority software or hardware event can be handled instead.
0
votes
4answers
60 views
How to run functions concurrently
I'm building a scale which reads a value (from a load cell) and outputs it on a LED screen.
There is a function for the scale, read which will read the value from the scale.
However this is not ...
1
vote
1answer
43 views
Peak counting in serial Arduino
I want to count peak of photocell data with serial communication in Arduino.
Here is the question. My problem is when I count one of the peaks it continues the counting and doesn't stop counting. My ...
0
votes
0answers
23 views
Measure water flow using arduino yun but has no pulse reading
I have water flow sensor (paddle wheel type) with arduino yun board. I am trying to get the pulse as the paddle wheel rotates.
The water flow sensos's name is 515 Rotor-X Paddlewheel Flow Sensors.
...
1
vote
1answer
59 views
while(1) loop blocks program to enter interrupt
I want to build a program in C that enables / disables a passive matrix display. But my problem occurs before I can even implement one function of this display.
I have a simple switch connected to ...
0
votes
1answer
63 views
ATtiny85 AC Phase Control for dimming a light bulb
I'm trying to dim a light bulb via an ATtiny85, which accepts commands sent over I2C. My problem is that the bulb is barely dimming and is flickering quite a bit.
My circuit can be seen here:
The ...
1
vote
2answers
27 views
Interrupts on the Arduino NG
I am a newbie to using arduino. I am using an arduino NG (using an atmega8) one of the pins is a button that triggers an interrupt. The problem I am trying to solve is I want an arduino NG to store ...
0
votes
0answers
43 views
Problem with SPI transactions on Arduino Due
I'm having problems with SPI transactions on Arudino DUE. Here are some facts about my project:
ADC interrupts on pins 20 and 21
Uses SPI to read measured value
Starts a new measure cycle which will ...
0
votes
1answer
59 views
I can't receive a letter using UART
I wrote a simple program where I transmit and receive a letter via UART. The transmit function works 100% but the receive interrupt function doesn't work at all... Can someone adjust the receive ...
0
votes
1answer
49 views
Does recieving data with SPI stop the main loop
I have a loop of code running on a Mega 2560 that is running at a certain speed that I get from an Arduino Uno. I have tried to talk with I2C but when I have received the data from I2C, the whole code ...
0
votes
1answer
35 views
Using SPI Interrupt causes two servos to lose functionality
My Arduino MEGA clone (ATMEGA 2650) reads SPI data as a slave using an interrupt.
There are also two servos that make an arm (shoulder and elbow).
When I comment out the line that attaches the SPI ...
0
votes
2answers
18 views
Custom ISR triggering function/value
Is there a way to write a custom function which would be the mode/reason to trigger an interrupt. I have an analog joystick connected to my arduino analog pin. It reads a value of 689 on one end and 0 ...
1
vote
2answers
51 views
How time intensive or how long can an ISR be?
I would like to code my ISR to be time intensive or interrupt the main program for atleast 1 or more seconds. My goal is to verify that if I am reading a sensor in the main loop, would it stop reading ...
5
votes
0answers
43 views
SOLVED - Waking up async the Arduino while it's sleeping periodically
The solution is below.
I´m using LowPower.h and PinChangeInt.h libraries to put my Arduino into the sleep mode every 8 seconds and then it wakes up, modifies a counter and it goes to sleep again, but ...
1
vote
1answer
56 views
Waking up async the Arduino while it's sleeping periodically
The solution is below.
I´m using LowPower.h and PinChangeInt.h libraries to put my Arduino into the sleep mode every 8 seconds and then it wakes up, modifies a counter and it goes to sleep again, but ...
1
vote
0answers
38 views
Rotary Encoder on LoLin NodeMcu increases value when rotating right/left
I have a test program running on my LoLin NodeMcu board, with a Rotary Encoder connected.
I use Task.h and RotaryEncoderTask.h from this library: https://github.com/Makuna/Task (though my issue is ...
1
vote
1answer
53 views
AVR timer overflow interrupt not working
My problem is an interrupt service routine (ISR) that seemingly never executes! Here's some info on my set up: I am flashing an avr attiny85. I have the bare bones of a project set up so far with ...
4
votes
1answer
223 views
How do interrupts work on the Arduino Uno and similar boards?
Please explain how interrupts work on the Arduino Uno and related boards using the ATmega328P processor. Boards such as the:
Uno
Mini
Nano
Pro Mini
Lilypad
In particular please discuss:
What to use ...
1
vote
1answer
80 views
Wake Arduino (Atmega328) from sleep with ADXL345 interrupt
So I'm relatively new to microcontrollers, and I'm having a problem implementing a feature I want for a project.
I've learned about putting an Atmega328P to sleep from this tutorial. I'm using an ...
0
votes
2answers
48 views
Does 'digitalPinToInterrupt' work with analog pins
I have an interrupt signal attached to the A12 pin of an Arduino Mega 2560.
Would the following source line activate the interrupt processing? I am calling the digitalPinToInterrupt function on an ...
-1
votes
1answer
127 views
Arduino Uno Wifi Module ESP8266 AT Command Test error [closed]
When i Connected Rx>Rx (Rx Of module To Pin 0 Of Arduino) And Tx>Tx ( Tx Of Module To Pin 1 Of Arduino), The AT Command Test shows The Following error With Scrambled Words, but when I Connect Rx>Tx (...
1
vote
3answers
99 views
AC meter By ADC timer interrupt from Nick Gammon
I want to read ADC from the pin A0 and A1. I have written in this code, however.
I took this code came from Nick Gammon
Thank You
///////////////////////////////////////////////////////////////////...
0
votes
1answer
38 views
Do ISRs have to be defined in top level Arduino program?
I'm currently attempting to implement some interrupts on an Arduino project. Looking through some of the examples, it appears that all the ISRs are defined in the top level Arduino program. I'm ...
1
vote
0answers
28 views
Arduino Record pulseIn
I am currently working on a project which requires me to record IR signals. (I realize there is a library available for doing this but I want to learn how to do this myself).
I tried using a simple ...
0
votes
0answers
20 views
Arduino Mega connection to Arduino GSM 2 shield
I'm about to purchase the Arduino GSM shield 2 and have a question about connecting the shield to an Arduino Mega. It says on the documentation that you need to reroute pin 2 to pin 10 so that it can ...
0
votes
0answers
55 views
how do program the interrupt routine?
I am having some trouble programming my interrupt routine using this library that interfaces with the timer1 on my arduino uno.
I am having issues with calling a non-static member within a static ...
1
vote
2answers
70 views
Sending Large Packets and Reassembling over Serial
I'm trying to send info of about 30-40kB over the Serial ports on an Arduino Due. But I'm running into a few problems.
First, before we get into the actual transfer over the Serial, I want to try ...
5
votes
1answer
63 views
Is there a portable timer interrupt library?
I have a need for timer interrupt (for the sake of this exercise - say I need to execute something every second)
I found code in many places on the internets that does this using ISR for 328/Uno. (...
1
vote
1answer
49 views
Interrupt and delay problems on Attiny 85
I wrote this code and uploaded it to attiny85:
int hours = 2;
int minutes = 4;
static int MINUTES_COUNT_BIT = 5;
static int HOURS_COUNT_BIT = 3;
#define button 2
void setup() {
pinMode(3,...
2
votes
3answers
74 views
What is the maximum length an Interrupt Service Routine?
In general, what's the maximum length of instructions that can be included in an Interrupt Service Routine?
The docs say an ISR should be "as short and fast as possible", but that's bit vague.
For ...
1
vote
1answer
28 views
Object can't get the right value of its property
I'm doing a program for a robot and I got stuck at a weird problem:
I have classes defined for my robot's internals, for example for a StepMotor. I also defined a class for a Controller, which is ...
0
votes
1answer
35 views
ISR halts in DUE
I am using the following simple code to test the interrupt functionality of due:
void aMillion(){
for(int i = 0; i < 1000000; i++){
if(i % 1000 == 0){
Serial.print("m");
...
2
votes
2answers
182 views
Using a lot of interrupts on a single Arduino
I'm doing a little project that requires a lot of sensors. Right now I'm using 4, but i want to reach up to 60 sensors, and a minimum of 16 (for me that's a lot).
So, I have an Arduino MEGA 2560, and ...
2
votes
1answer
130 views
How can I replace pulseIn with interrupts?
I have an HC-SR04 sensor and I need to get the distance from it. I use this code:
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, ...
0
votes
2answers
60 views
Sketch does not work without delay() or other complex functions like digitalWrite()
I have a simple sketch here that should just blink a led once a second or so (approximately):
boolean onOff=true;
int count=0;
void setup() {
pinMode(13, OUTPUT);
}
void loop() {
count++;
...
0
votes
1answer
17 views
Pin 0 (62) you are trying to use is not supporting interrupts
Using RCLib (github) I'm getting this error. The trick is that the RCLib example works on it's own but does not work in my program (github).
Serial Output "Error"
Pin 0 (62) you are trying to use is ...
0
votes
0answers
120 views
Teensy CAN Bus Interrupt
I have got a teensy together with a SN65HVD230 connected to a CAN bus network. When I process the data within a loop, there are messages missing from time to time, especially when I do post-processing....
6
votes
2answers
303 views
interrupting an interrupt
What should be expected if the code in the timer interrupt ISR does not finish before the interrupt is called again? For example Timer0 ISR(TIMER0_COMPA_vect){} on the Uno. This is for debugging ...
0
votes
0answers
105 views
Button interruption using ESP8266-12
i'm trying to use a button interrupt on gpio5 of the ESP8266-12 but i have a problem that the interruption didn't work . is there someone who tried this and can help me ? this is my code .
# include ...
0
votes
1answer
39 views
A lot of “undefined reference” errors
I'm trying to create a program for my robot, but something is not right.
Here's the code:
#include <SPI.h>
#include <Tone.h>
#include <Wire.h> // standardowa biblioteka Arduino
#...
0
votes
1answer
36 views
Pass templated function as attachInterrupt parameter
So I want to do something like this:
template<int PIN, int CHANNEL>
void initPin() {
attachInterrupt(PIN, rising<PIN, CHANNEL>, RISING);
}
template<int PIN, int CHANNEL>
void ...
0
votes
1answer
72 views
Simple interrupt
This is my code. What I am trying to do is when I press the button, all of the LED will be "pause" immediately.
I have 3 LED. All of LED will blink consecutive.
When I press the button (BA), only ...
1
vote
0answers
95 views
Interrupt for traffic light
I have mini project which is Emergency Traffic Light for Ambulance, police etc.
What I am try to do is when emergency traffic light go through first sensor 1 (in this code I just using button, “SA”), ...
0
votes
0answers
87 views
DC motor control with quadrature encoder
I am trying to (somewhat) accurately control a DC gear motor using a quadrature encoder and an Arduino Uno. There is a pressure sensor acting as a target, and when hit, initiates the motor sequence. ...
0
votes
1answer
61 views
How to delay outside loop
I am using a function outside loop(), which is called after an interrupt. Inside this function, I am setting several relays that need to change after a second or two, depending on my setting. I tried ...
0
votes
1answer
30 views
Using an external interrupt alongside serial
I want to read data from an accelerometer sensor, which pushes its data to the Arduino via an external interrupt. I then want the Arduino to relay this data to a host computer via the serial ...
1
vote
0answers
70 views
Arduino Quadcopter problems
I'm currently trying to make a quadcopter flight controller based on the Arduino Uno, and I've managed to make everything work for one axis by printing the values of two of the motors, except now that ...
0
votes
2answers
89 views
PCINT with my arduino UNO says redefinition of 'void __vector_4()'
So i'm working on a quadcopter controlled by the arduino UNO, and focusing in pin interrupts for the reciever. This is the code for the reciever.
unsigned long timer[4];
byte last_channel[4];
...
1
vote
1answer
92 views
Arduino Mega Hall sensor interrupt for a speedometer
I am having difficulty setting up an interrupt to count how many times the magnet passes so that I can count something like every 100 ms the actual speed.
I have a little code put together from the ...
1
vote
2answers
48 views
What is the difference between running code with the scope of the void setup() or void loop() vs. outside their scope?
Good evening everyone,
I have bene playing around with making my own library, specifically for the controlling Timer1 on the Arduino Mega 2560. I'm sort of new to OOP but I am trying my hand at it ...
0
votes
1answer
87 views
Sleep and Wake Arduino according to LDR interrupt
I have to sleep the system in the night and have to wake the system in day time. I am using LDR to get input. LDR input is connected to interrupt pin 0 of Arduino Uno.
Here is my code.
#include <...
