Transition Your Code to aardvark or ni845x Interface - MATLAB & Simulink

Transition Your Code to `aardvark` or `ni845x` Interface

The i2c function, its object functions, and its properties will be removed. Use the device function with an aardvark or ni845x object instead.

`i2c` Interface		Example
`instrhwinfo`	`aardvarklist` or `ni845xlist`	Discover I2C Controllers
`i2c` and `fopen`	`aardvark` and `device`	Connect to I2C Controller and Peripheral Device
`i2c` and `fopen`	`ni845x` and `device`	Connect to I2C Controller and Peripheral Device
`fwrite`	`write`	Write and Read Binary or String Data
`fread`	`read`	Write and Read Binary or String Data

Discover I2C Controllers

This example shows how to discover I2C controllers physically connected to your machine using the recommended functionality.

Functionality	Use This Instead
aaInfo = instrhwinfo("i2c","Aardvark");	aaList = aardvarklist;
niInfo = instrhwinfo("i2c","NI845x");	niList = ni845xlist;

For more information, see aardvarklist and ni845xlist.

Connect to I2C Controller and Peripheral Device

This example shows how to connect to an I2C controller and peripheral device and disconnect from it using the recommended functionality.

Functionality Use This Instead

Functionality	Use This Instead
a = i2c("Aardvark",0,80); fopen(a)	a = aardvark(aaList.SerialNumber(1)); d = device(a,I2CAddress=80);
n = i2c("NI845x",0,80); fopen(n)	n = ni845x(niList.SerialNumber(1)); d = device(n,I2CAddress=80);
fclose(a) delete(a) clear a Same for object `n`.	clear d clear a Same for object `n`.

a = i2c("Aardvark",0,80);
fopen(a)

a = aardvark(aaList.SerialNumber(1));
d = device(a,I2CAddress=80);

n = i2c("NI845x",0,80);
fopen(n)

n = ni845x(niList.SerialNumber(1));
d = device(n,I2CAddress=80);

fclose(a)
delete(a)
clear a

Same for object n.

clear d
clear a

Same for object n.

The fopen function is not available in the updated interface. The object creation functions aardvark, ni845x, and device create the object and connect the object to the I2C controller or peripheral device.

The fclose function is not available in the updated interface. The clear function disconnects the objects from the I2C controller or peripheral device when it removes the objects from the workspace.

For more information, see aardvark, ni845x, and device.

Write and Read Binary or String Data

These examples show how to perform a binary write and read, how to write nonterminated string data, and how to write and read fixed-length string data, using the recommended functionality.

Functionality Use This Instead

Functionality	Use This Instead
% a is an i2c object fwrite(a,0:8,"uint8"); data = fread(a,8,"uint8") data = 1 2 3 4 5 6 7 8 Same for object `n`.	% d is a device object write(d,0:8,"uint8"); data = read(d,8,"uint8") data = 1 2 3 4 5 6 7 8
% a is an i2c object fwrite(a,[0 'hello'],"char"); Same for object `n`.	% d is a device object write(d,[0 'hello'],"char");
% a is an i2c object fwrite(a,0,"char"); data = fread(a,5,"char"); data = char(data)' data = 'hello' Same for object `n`.	% d is a device object write(d,0,"char"); data = read(d,5,"char") data = 'hello'

% a is an i2c object
fwrite(a,0:8,"uint8");
data = fread(a,8,"uint8")

Same for object n.

% d is a device object
write(d,0:8,"uint8");
data = read(d,8,"uint8")

data =

     1     2     3     4     5     6     7     8

% a is an i2c object
fwrite(a,[0 'hello'],"char");

Same for object n.

% d is a device object
write(d,[0 'hello'],"char");

% a is an i2c object
fwrite(a,0,"char");
data = fread(a,5,"char");
data = char(data)'

data =

    'hello'

Same for object n.

% d is a device object
write(d,0,"char");
data = read(d,5,"char")

data =

    'hello'

For more information, see write or read.