How can i command an i2c digital potentiometer(DS1803) with Matlab Support Package for Arduino hardware ?

How can i command an i2c digital potentiometer(DS1803) with Matlab Support Package for Arduino hardware ?

Hello, I'm a french trainee and I'm working on temperature simulation thanks to digital potentiometer (DS 1803).

I command the potentiometer with an Arduino Mega, i succeeded with the arduino software but now I want to use Matlab.

I read instructions about the Matlab support package for arduino hardware, particulary i2c's instructions and i implemented these but there wasn't result..

Here is my code :

a=arduino('COM4','Mega2560');

dev=i2cdev(a,'0x28');

write(dev,'B10101001');

write(dev,100);

Can you help me ? regards.

Answer 1

[Manish Annappa]

1) Are you getting any error when you send the data to the device through i2cdev ? If so, post the error message here.

2) What is the expected behavior you see when you try to send the same data to the device outside of MATLAB (from Arduino software)?

[Anthony Auvergnon]

Thanks for your answer, i adressed the issue yesterday, it was just an issue about how declare a binary number in matlab.

Answer 2

[Walter Roberson]

Replace

write(dev,'B10101001');

with

write(dev, uint8(bin2dec('10101001')) );