How can I collect data from two different sources simultaneously?

Question

Shion 2019-3-13

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/449904-how-can-i-collect-data-from-two-different-sources-simultaneously

回答： Dhanashree Mohite 2019-4-8

I have two streams of data that I would like to acquire simultaneously (at different rates):

1) Arduino for IMU (USB)

2) Image Acquisition toolbox to acquire frames from ultrasound machine (USB)

I tried a parfor loop to run separate functions for each stream but keep getting an error saying: "Error: Select correct COM Port where Arduino is connected". The functions run fine independently. Is there a way that I can acquire data from both sources simultaneously?

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Answer 1

Dhanashree Mohite 2019-4-8

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/449904-how-can-i-collect-data-from-two-different-sources-simultaneously#answer_369535

As per my understanding, you can use the Parallel Computing Toolbox's SPMD feature to do this. The other alternative is to do time-slicing, where asynchronous reads would be performed using the 'bytesavailablefcn' callback.

Please refer below MLAnswer links for more understanding:

https://www.mathworks.com/matlabcentral/answers/339524-how-do-i-read-from-two-serial-ports-in-parallel-on-the-same-machine

https://www.mathworks.com/matlabcentral/answers/32901-read-write-multiple-serial-devices-in-matlab