![]() ![]() ![]() With such a theoretical future Wire library, Several people have requested that someone improve the Wire library to make it non-blocking Just because a pin is labeled "interrupt" doesn't mean it has to be handled by an interrupt routine. Then call that function every time through the main loop(). Then write a function to check that pin and do the appropriate things. Perhaps the easiest method is polling: connect the interrupt pin of the 元GD20H up to some general-purpose digital input pin of the Arduino. The NorDevX 元GD20H Gyro Arduino Code Using I2C.The Adafruit 元GD20 Library for the Arduino.(If someone has already done it, it must be possible, right?) If I were you, my next step would be to look at Arduino software for the 元GD20H and see how they handled it. 45 of the datasheet says that reading the IG_SRC register clears the interrupt signal on INT1. I'm assuming you've already looked at the 元GD20H datasheet and the 元GD20H errata sheet,Īnd you understand that the data-ready pin (DRDY) is sometimes called an interupt pin (INT2), not to be confused with "the" programmable interrupt pin (INT1). Microcontroller can't handle the interrupt from an ISR using an How is the sensor's interrupt line intended to be used if the I'm using the 元GD20H MEMS gyroscope with an Arduino. Off during an ISR and everything goes kinda south. ![]() I2C communications which require interrupts, but interrupts are turned …during the ISR (Interrupt Service Routine) I was trying to read theĭevice to determine which bit changed. Here's a comment I found elsewhere on a similar issue that led me to believe that the hang encountered was from I2C reads failing inside an interrupt handler: nested interrupts or performing I2C reads from the main program. Handling the I2C transaction still requires re-enabling interrupts, i.e. 183.3Hz rather than 189.4Hz per the datasheet). Use a timer to interrupt set to the sample rate of the sensor (which is settable and constant, although we measure it to be e.g. The sensor library used depends on the interrupt-driven Wire library. Use non-interrupt-driven I2C (polling)-supposedly a dangerous approach inside of ISRs. Use nested interrupts (as mentioned): re-enable I2C interrupt inside of ISR. How can new sensor data be retrieved from the ISR for the interrupt line when also using the I2C subsystem in an interrupt-driven manner? But on many microcontrollers, retrieving data (let alone clearing the flag raising the interrupt line) requires using the normally interrupt-driven I2C subsystem of a microcontroller. General question: With some digital output sensors (I2C, SPI, etc.), their datasheets and application notes describe using a separate (out-of-band) hardware line to interrupt the microcontroller and have it handle new sets of data. ![]() Currently, I poll the STATUS register's ZYXDA bit (which is what the DRDY line outputs) as needed. Background: I'm using the 元GD20H MEMS gyroscope with an Arduino through a library (Pololu 元G) that in turn relies on interrupt-driven I2C (Wire.h) I'd like to be able to handle each new reading from the sensor to update the calculated angle in the background using the data ready line (DRDY). ![]()
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