How can i set the sampling rate for Arduino analogRead in matlab code?

Question

Soo Chong 2017-5-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/340297-how-can-i-set-the-sampling-rate-for-arduino-analogread-in-matlab-code

回答： Sadam Hussain 2018-8-10

I want to use current sensor ACS712 to read the real time value for of 50Hz line current with the following code I found on the internet, but it not given the real-time signal. How can I set the sampling rate?

if true
  % code
end
a = arduino(); % Create a figure window to monitor the live data
tmax = 10; % Total time for data collection in seconds
figure(1),
grid on,
xlabel ('Time (s)'), ylabel('Voltage');
axis([0 tmax -2.5 2.5]); % set initial index value, starting value
k = 0;  %index
v = 0;  %voltage
t = 0;  %time
tic % Start timer
while toc <= tmax
  k = k + 1;
  v(k) = readVoltage(a,'A0')-1.47; %maximum value=3.935
  t(k) = toc;
      % Now plot the data
  if k > 1
      line([t(k-1) t(k)],[v(k-1) v(k)]);
      drawnow;
  end
end