How to Read and Write Serial Port Data in Raspberry Pi

[Jackson Zhang]

Hi,

I want Raspberry Pi to run a piece of code independently, read and write data from the serial port separately, and the other recipient is my PC. Can I directly deploy this code into it?I followed the Mathworks tutorial, but I don't know where the problem occurred. My current steps are as follows

Firstly, I created a connection with Raspberry Pi in MATLAB and sent a matrix

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r = raspi;

pc = serialdev(r,'/dev/serial0');

dataToSend = [22;4;5;6;7];

byteStream = typecast(dataToSend, 'double');

Then,I will deploy the following code to Raspberry Pi to read data from the serial port and send some data to the serial port

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function tablelook()%#codegen

r = raspi;

rsp = serialdev(r,'/dev/serial0');

output = read(rsp,5,'double');

...%my system code

write(rsp,1,'double')

(I obtain my final 0/1 through the five input parameters and output it to the serial port)

Finally,I read the data in MALTAB

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read(pc,1,'double')

But I get wrong data during transmission,all of them is zeros.

Can you give me some advice?

Many thanks,

Bang