interrupt.ino File Reference

I2C interrupt example for the DevLab ICM-20948. More...

#include <Wire.h>
#include <DevLab_ICM20948.h>

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Go to the source code of this file.

Macros
#define	SDA_PIN   6
	I2C SDA pin used by the example board.
#define	SCL_PIN   7
	I2C SCL pin used by the example board.
#define	I2C_FREQ   400000UL
	I2C bus speed in hertz.
#define	ICM_ADDR   0x69
	ICM-20948 I2C address selected by the AD0 pin.
#define	PIN_INT   D7
	MCU pin connected to the IMU interrupt output.

Functions
void	printLinea ()
	Print a separator line to Serial.
void	printDobleLinea ()
	Print a double separator line to Serial.
void IRAM_ATTR	isrHandler ()
	Interrupt service routine for the IMU data-ready signal.
void	setup ()
	Initialize I2C, verify the IMU, configure interrupts, and attach ISR.
void	loop ()
	Report interrupt events when the ISR count changes.

Variables
DevLab_ICM20948	imu
	Global ICM-20948 driver instance.
ICM20948_IntPinConfig	pinCfg
	Interrupt pin electrical and latch configuration.
ICM20948_IntEnableConfig	intEn
	Interrupt enable flags used by this example.
volatile uint32_t	isrCount = 0
	Number of interrupt events observed by the ISR.

Detailed Description

I2C interrupt example for the DevLab ICM-20948.

Author

Jonathan Mejorado Lopez

Configures the IMU raw-data-ready interrupt pin and counts ISR events on an Arduino-compatible board.

Definition in file interrupt.ino.

Macro Definition Documentation

I2C_FREQ

#define I2C_FREQ   400000UL

I2C bus speed in hertz.

Definition at line 17 of file interrupt.ino.

ICM_ADDR

#define ICM_ADDR   0x69

ICM-20948 I2C address selected by the AD0 pin.

Definition at line 19 of file interrupt.ino.

PIN_INT

#define PIN_INT   D7

MCU pin connected to the IMU interrupt output.

Definition at line 21 of file interrupt.ino.

SCL_PIN

#define SCL_PIN   7

I2C SCL pin used by the example board.

Definition at line 15 of file interrupt.ino.

SDA_PIN

#define SDA_PIN   6

I2C SDA pin used by the example board.

Definition at line 13 of file interrupt.ino.

Function Documentation

isrHandler()

void IRAM_ATTR isrHandler

(

)

Interrupt service routine for the IMU data-ready signal.

Definition at line 53 of file interrupt.ino.

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loop()

void loop

(

)

Report interrupt events when the ISR count changes.

Definition at line 95 of file interrupt.ino.

printDobleLinea()

void printDobleLinea

(

)

Print a double separator line to Serial.

Definition at line 29 of file interrupt.ino.

printLinea()

void printLinea

(

)

Print a separator line to Serial.

Definition at line 27 of file interrupt.ino.

setup()

void setup

(

)

Initialize I2C, verify the IMU, configure interrupts, and attach ISR.

Definition at line 60 of file interrupt.ino.

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Variable Documentation

imu

DevLab_ICM20948 imu

Global ICM-20948 driver instance.

Definition at line 24 of file interrupt.ino.

intEn

ICM20948_IntEnableConfig intEn

Initial value:

= {
  .rawDataRdyEn = 1   
}

Interrupt enable flags used by this example.

Definition at line 43 of file interrupt.ino.

isrCount

volatile uint32_t isrCount = 0

Number of interrupt events observed by the ISR.

Definition at line 48 of file interrupt.ino.

pinCfg

ICM20948_IntPinConfig pinCfg

Initial value:

= {
  .activeLevel   = 1,
  .driveMode     = 0,
  .latchMode     = 0,
  .clearMode     = 1,
  .fsyncActLevel = 0,
  .fsyncIntEn    = 0,
  .bypassEn      = 0
}

Interrupt pin electrical and latch configuration.

Definition at line 32 of file interrupt.ino.