![]() Is there any way around this aside from the work-around I just described?īTW – I am using Arduino 1.0.6 IDE and Teensyduino 1. Some microcontrollers support native software interrupt. So, does the teensy’s H/W peripheral get frozen during an external interrupt event? Software interrupts are interrupt signals that can be fired with specific software instructions. It probably wont take long working with the Arduino before you will find a need to use hardware or timer interrupts. Note: If you need to use a pin as an interrupt that is not listed in the default pins for your AVR microcontroller, you may want to try using the PinChangeInt. AUTHOR: Arduino Once you are comfortable with the Arduino software and using the built-in functions, you may want to extend the ability of your Arduino with additional libraries. An interrupt, when sensed on the Arduino, pauses the system. While this works, I would rather (and simply) issue the I2C command from with the ISR to avoid the latency (and not to mention declutter the loop). Installing Libraries Learn how to install additional libraries in the Arduino IDE 1. You can take these interrupt pins and connect them to your Arduino to trigger an interrupt. ![]() I have been working around this by setting a flag from within the ISR, exiting the ISR, and then checking for this flag from loop() – which then I am able to send the I2C command sequence and clear the interrupt. The device has interrupt pin is connected back to a digital input on the teensy which is configured for interrupt.Įverything works as expected except – when the device asserts the interrupt the H/W I2C peripheral seems paused, and I am unable to issue the I2C command sequence FROM WITHIN THE ISR - to the device to clear the interrupt! If you ever decided that you wanted to connect two Arduinos together and have them talk via I2C, you can do this by using the Wire.begin(intAddress) function. On the Arduino boards with the R3 layout (1. I have an I2C device (sensor) connected and communicating perfectly with my teensy 3.1. For example, there is a Touch Interrupt which happens when touch is detected and a GPIO interrupt when a key is pressed down. Description This library allows you to communicate with I2C/TWI devices.
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