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writeRegister

Write data to I2C device register

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Syntax

writeRegister(dev,register,dataIn)
writeRegister(dev,register,dataIn,precision)

Description

example

writeRegister(dev,register,dataIn)writes data to the I2C device register.

example

writeRegister(dev,register,dataIn,precision)also specifies the data precision.

Examples

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Open Live Script

Create an Arduino object and attach an I2C device object to it.

a = arduino(＇COM9',＇Uno',＇Libraries',＇I2C');

Use an address to create the I2C device connection.

dev = device(a,＇I2CAddress',＇0x55');

Write value 10 to the I2C device register at address 20.

writeRegister(dev,20,10);
Open Live Script

Create an Arduino object and attach an I2C device object to it.

a = arduino(＇COM9',＇Uno',＇Libraries',＇I2C');

Use an address to create the I2C device connection.

dev = device(a,＇I2CAddress',＇0x55');

Write value 10 to the I2C device register at address 20 with the precision of uint16.

writeRegister(dev,20,10,＇uint16');

Input Arguments

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I2C device connection, specified as adeviceobject.

Address of the I2C device register, specified as a scalar integer from 0 through 255, hexadecimal, or binary.

Data to write, specified as a scalar, vector, hexadecimal, or binary. The range of the values in the array is based on theprecision.

Data precision, specified as one of the following character vectors:

  • ＇uint8'

  • ＇int8'

  • ＇uint16'

  • ＇int16'

  • ＇uint32'

  • ＇int32'

  • ＇uint64'

  • ＇int64'

Data can be also be specified in the following formats:

  • hexadecimal

  • binary

  • char

  • string

More About

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Code Generation UsingMATLABFunction Block

  • UsewriteRegisterin a MATLAB®Function block with the万博1manbetx®万博1manbetx支持包Arduino®Hardwareto generate code that can be deployed on Arduino Hardware.

  • Values ofdataInis not validated against theprecision. ThedataInvalues will be saturated when it goes beyond the range of the specifiedprecision.

Version History

Introduced in R2014b

See Also

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