400KHz I2C with Total Phase's Aardvark only transmits at 100KHz

I am able to use Total Phase's Aardvark I2C/SPI to send and read data with I2C. However, the transfers only occur at 100KHz with MatLab 2016b in Windows and macOS. I have setup my device as follows:

%%*** initialize i2c channel and unlock i2c slave access 
    Vendor = 'Aardvark';
    BoardIndex = 0;
    i2c_dev = i2c(Vendor,BoardIndex,RemoteAddress);
    i2c_dev.BitRate = 400;
    i2c_dev.PullupResistors = 'none';
    i2c_dev.TargetPower = 'none';
    set(i2c_dev,'OutputBufferSize',512)
    fopen(i2c_dev);

Matlab reports the BitRate set at 400KHz, but proving the bus, all SCL clocks are 100KHz. How do I get to set the bitrate to 400KHz?

Using Total Phase's Control Center, I am able to send commands at 400KHz. Thus, the Aardvark can generate SCL clocks at 400KHz.

Thanks.

Answer 1

[Nikhil Sreekumar]

Hi Pedro,

Please refer to the bug report below. This addresses the issue that you are facing:

https://www.mathworks.com/support/bugreports/1472060

Thanks

Nikhil

Answer 2

[Pedro Gelabert]

The workaround did not solve the issue. I managed to get MatLab 2017 and that transmits at 400KHz properly.