Event Scheduling and Interrupt Handling
R2026bImprove system responsiveness to real-time tasks and events using external and hardware interrupts for Arduino® boards across various architectures.
Blocks
 | External Interrupt | Trigger the downstream function-call subsystem from an Interrupt Service Routine |
 | Hardware Interrupt SAMD | Trigger downstream function-call subsystems from interrupt service routine for Arduino SAMD21 core (Since R2023b) |
 | Hardware Interrupt AVR | Trigger downstream function-call subsystems from interrupt service routine for Arduino AVR core (Since R2024a) |
 | Hardware Interrupt SAM | Trigger downstream function-call subsystems from interrupt service routine for Arduino SAM core (Since R2024b) |
 | Hardware Interrupt Teensy4 | Trigger downstream function-call subsystems from interrupt service routine for Teensy 4.0 and 4.1 boards (Since R2024b) |
Topics
- Model Reference Support for Arduino Driver Blocks in Simulink
Enable model hierarchy and modular design in Simulink® by using Arduino driver blocks within a referenced model.
Troubleshooting
Workaround for Interrupt Workflow with Sensors
Follow the steps to use interrupts with sensors and the I2C protocol.
External Interrupts Workflow for Arduino
Follow the steps to use external interrupts in Simulink models.
Featured Examples
Generate Interrupts Using Arduino SAMD PWM Block
Use the Hardware Interrupt block to create an interrupt service routine (ISR) to react to the PWM events on your Arduino® hardware.
Get Started with Arduino SAMD Event System Using PWM and ADC Peripherals
Use the event system with Arduino Advanced PWM, Analog Input, and Hardware Interrupt blocks.
Estimate Battery Current of PMSM in Open-Loop Control Using Arduino Hardware
Use Simulink® Support Package for Arduino® Hardware to estimate the battery current of a permanent magnet synchronous machine (PMSM) in open-loop control using Motor Control Blockset™. This example also shows how to actuate a PMSM motor and calculate phase currents that are indirectly used to estimate the current of the battery.
Trigger Downstream Function-Call Subsystem Using Arduino External Interrupt Block
Trigger a downstream function call subsystem by using an External Interrupt block from the Simulink® Support Package for Arduino® Hardware.
Measure PWM Frequency by Triggering an ISR on Arduino Hardware
Measure the frequency of a pulse-width modulation (PWM) signal on an Arduino® hardware using Arduino External Interrupt block. The example uses the same board to generate and detect the PWM signal. The pin 2 is connected to the pin 3 of the Arduino Mega 2560 hardware. The pin 2 generates PWM signal. When there is a rising edge at pin 3, the External Interrupt block executes a function call to calculate the time between two consecutive rising edges of the signal, which in turn is used to calculate the frequency of the signal at pin 3.
Read Data from ICM20948 Sensor Using Data Ready Interrupt
Use the interrupt generated by ICM20948 IMU Sensor block to trigger a downstream function-call subsystem that reads acceleration and angular velocity data from the ICM-20948 sensor connected to an Arduino® board.
Triple-Axis Tilt Calculation Using LIS3DH FIFO Data Ready Interrupt
Use the FIFO data ready interrupt of LIS3DH linear accelerometer connected to an Arduino® board to sense the tilt of the sensor. This is done using a downstream function-call subsystem that reads acceleration values from FIFO buffer sensor.
Single Click and Double Click Detection Using LIS3DH Single Click Interrupt
Use the Single Click interrupt of LIS3DH linear accelerometer connected to an Arduino® board to sense the single click and double click of the sensor.
Free-Fall Detection Using LIS3DH Freefall Application Interrupt
Use the Inertial freefall application interrupt of LIS3DH linear accelerometer connected to an Arduino® board to sense the free-fall of the sensor.
Impact Detection Using LIS3DH Inertial Wakeup Interrupt
Use the Inertial wake-up interrupt of LIS3DH linear accelerometer connected to an Arduino® board to sense the impact of the sensor.
IMU-Based Motor Speed Control on Arduino Using SERCOM Serial Interrupts
Learn how to implement motor speed control on Arduino using IMU sensor data and SERCOM serial interrupts in Simulink.
