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1. Adxl345 turn on arduino i2c example how to#
2. Adxl345 turn on arduino i2c example software#
3. Adxl345 turn on arduino i2c example code#
4. Adxl345 turn on arduino i2c example download#

Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°. Static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. The ADX元45 is well suited for mobile device applications.

Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. For example, if you use this function with the register address 0x04, then the first 8 bits will go to the 0x04 register, and the last 8-bits will be written into the 0x05 register.This is a breakout board for Analog Devices ADX元45 3-Axis Accelerometer.The ADX元45 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ☑6 g. You can also use wiringPiI2CWriteReg16() to write a 16-bit data to 2 adjacent registers. It takes 3 parameters: the file descriptor of the selected device, the register address, and the data to write. The function wiringPiI2CWriteReg8() allows you to write a 8-bit register on the device. That’s a good opportunity here to write to a register with the WiringPi library. To get acceleration data from the ADX元45 sensor, we need to change its mode from standby mode (default) to measurement mode.Īs stated in the datasheet we have to set the ‘Measure Bit’ to 1, which is the 4th bit of the 8-bit register, hence the 0b00001000 value. Writing to a register // Switch device to measurement mode

Once the communication is successfully initiated, we can start interacting with the sensor. It will try to connect to that device, and return a file descriptor. This function takes the device ID as a parameter. The first thing we do is to setup the I2C communication with the wiringPiI2CSetup() function. Std::cout << "I2C communication successfully setup.\n" Std::cout << "Failed to init I2C communication.\n" Init I2C communication int main (int argc, char **argv) Here we will use the POWER_CTL register, as well as the data registers for all 3 axis.

Adxl345 turn on arduino i2c example code#

This is a good practice, so you won’t mix up register addresses in your code and it will save you some debugging time. We use define tags to set the device ID and registers. Here we include the wiringPiI2C header, which contains all I2C functions related to WiringPi (see this header file on GitHub). I’ll explain everything in a few seconds. Here’s the complete code to setup the I2C communication with WiringPi, read X, Y, and Z accelerations, and print the data. Complete code example with WiringPiĬreate a file named adxl345-i2c.cpp (or whatever you want). If you see this (device ID is 0x53) then your setup was correctly done.

Adxl345 turn on arduino i2c example software#

Once you’re done with hardware and software setup, and have reboot your Pi, run: i2cdetect -y 1Ġ0: -ġ0: -Ģ0: -ģ0: -Ĥ0: -ĥ0: - 53 -Ħ0:. You can now use I2C! Check that your device is detected Make sure you reboot your Pi after you’ve done this, because the configuration is done during the boot. Just un-comment the line (remove the leading ‘#”), save and exit the file, and that’s it. Search for “i2c”, you’ll find this line: #dtparam=i2c_arm=on Open (with sudo) the “/boot/config.txt” file. There are many ways to do that, but the simplest one is just by editing a config file. The setup is the same whether you use Raspbian or Ubuntu for Raspberry Pi.īy default I2C is disabled, you have to enable it yourself.

For this tutorial we’ll decide to use this ID. (Specific to ADX元45) The device ID on the I2C bus will be set as 0x53 if SDO is linked to GND.To enable I2C you have to connect the CS pin (Chip Select) to Vcc (3.3V here). (Specific to ADX元45) This device can be used with both I2C and SPI protocols.This complete Raspberry Pi pinout guide will help you get more details about each pin of the GPIO header.Īlright, the I2C hardware setup is done! Now you have to add 2 additional wires due to requirements of the ADX元45 device (here’s a resume of what’s written in the datasheet): Pins 2 and 3 both have a pull-up 1.8kOhm resistor. Fortunately, this is already done for you on Raspberry Pi.

Note: you usually have to add some pull-up resistors to SDA and SCL pins in order to be able to read something.

Adxl345 turn on arduino i2c example how to#

You are learning how to use Raspberry Pi to build your own projects?Ĭheck out Raspberry Pi For Beginners and learn step by step.

Adxl345 turn on arduino i2c example download#

You can find and download the complete datasheet here. In this WiringPi I2C tutorial we’ll use the ADX元45 digital accelerometer sensor.