High Frequency Accelerometer Data Capture with Arduino

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Audrey 2019-4-28

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/459046-high-frequency-accelerometer-data-capture-with-arduino

Hi All,

I've implemented some accelerometer data capture with arduino using the arduino add-on library + the LSM303 add on, much like this video describes:

https://www.mathworks.com/videos/read-lsm303-accelerometer-data-from-arduino-with-a-matlab-add-on-library-1489428633357.html

However, with tic toc managing the data capture, I'm getting a reading frequency of about 20Hz, and I'd like to get to 100Hz.

Is there a way to ask the arduino to store ~10 seconds of data at 100Hz and report it, to get around the time constraints of the tic toc function? If I were using the Arduino IDE, I imagine this would be some kind of Serial command, but I haven't been able to find examples for that in matlab.

Thanks!

Here's my current code (I am reading data from 2 identical systems, each with one arduino and one accelerometer):

a = arduino('/dev/cu.usbserial-AH06F3MJ','Uno', 'Libraries', 'Pololu/LSM303');
compass = addon(a, 'Pololu/LSM303');
a_b = arduino('/dev/tty.usbserial-AC00BNYZ','Uno', 'Libraries', 'Pololu/LSM303');
compass2 = addon(a_b, 'Pololu/LSM303');
sensor1_data = [];
sensor2_data = [];
time = [];
n = 1;
sensor1_data = [];
sensor2_data = [];
tic
while toc < 8
    acc2 = readAcceleration(compass2);
    acc1 = readAcceleration(compass);
    
    time(n,:) = toc;
    
    sensor1_data(n,:) = acc1;
    sensor2_data(n,:) = acc2;
    
    n = n+1;
    
end
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