How to record two IMU devices at the same time.

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koshi shibagaki 2019-10-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/483157-how-to-record-two-imu-devices-at-the-same-time

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I have two IMU devices.

Now I can record one IMU device.The code to record one is below.

I want to record two of these at the same time.

How do I need to change this code?

clear all;
close all;
% instrreset;
disp('Press Ctrl+C to stop collecting data!')
s=serial('com7','baudrate',9600);
fopen(s);%Open Com Port
%% set the graph
figure()
hx = animatedline('Color','r','LineWidth',1);
%hy = animatedline('Color','g','LineWidth',1);
%hz = animatedline('Color','b','LineWidth',1);
ax = gca;
ax.YGrid = 'on';
ax.YLim = [-270 270];
startTime = datetime('now');
%title(['Angle = ' num2str(A') 'deg']);
ylabel('deg');
%% set the parameter
f = 20;%DataFrequce
aa=[0 0 0];
ww=[0 0 0];
AA = [0 0 0];
tt = 0;
%a=[0 0 0]';
w=[0 0 0]';
A=[0 0 0]';
test_num = 1;
data_storage = [300000,5];
previous_sum = 0;
previous_data = 0;
%% get the angle
while(1)
    Head = fread(s,2,'uint8');
    if (Head(1)~=uint8(85))
        continue;
    end
    switch(Head(2))
        case 81
            a = fread(s,3,'int16')/32768*16 ;
            End = fread(s,3,'uint8');
        case 82
            w = fread(s,3,'int16')/32768*2000 ;
            End = fread(s,3,'uint8');
        case 83
            A = fread(s,3,'int16')/32768*180;
            AA = [AA;A'];
            t =  datetime('now') - startTime;
            % Add points to animation
            if AA(test_num,1) > 50
                AA(test_num,1) = AA(test_num,1) - 360;
            end
            addpoints(hx,datenum(t),AA(test_num,1))
            % Update axes
            ax.XLim = datenum([t-seconds(15) t]);
            datetick('x','keeplimits')
            drawnow;
            now = datevec(datetime('now'));
            now_sum = now(1,4)*3600 + now(1,5)*60 + now(1,6);
            
            %% we have to decide which axes we use
            data = AA(test_num,1);
            previous_data = data;
            data_storage(test_num,1) = now_sum;
            data_storage(test_num,3) = data;
            test_num = test_num + 1;
            
            End = fread(s,3,'uint8');
    end
end
fclose(s);
%% get the callibration data
plot(data_storage(:,1),data_storage(:,3));
ext = ginput(3);
flex = ginput(3);
rest = ginput(3);