How to pass python "byte" param to python interface called from matlab ?

1. python call interface from c++ dll
2. the input data type of interface is unsigned char*
3. python use bytes object(b'\x10') to pass param to dll interface
4. how matlab?

Answer 1

[Rushikesh]

Hello @烨,

I understand that you wish to call an interface from a C++ DLL in MATLAB, which requires an unsigned char* as input data. As you mentioned, in Python, we can use the bytes data type, which is compatible with the unsigned char* data type in C++. You can achieve similar functionality in MATLAB using two approaches:

1. C++ uses unsigned char* for binary data, and Python uses the bytes data type for binary data, which is compatible with unsigned char* in C++. In MATLAB, you can handle binary data using uint8 arrays. This array can then be converted to a Python bytes object
2. Another approach is to create a Python bytes data object directly in MATLAB. This is possible because MATLAB allows the use of Python code with the 'py.' prefix.

Please refer to the example below for guidance:

/* MATLAB array equivalent to b'\x10' in Python */ 
data = uint8([16]); 
pyData = py.bytes(data); 
/* Another way, create bytes data in MATLAB Python. */ 
pyBytes = py.bytes([16]); 

You can try to send MATLAB uint8 array directly to C++ DLL interface but this method is more complex and requires handling data conversion and memory management carefully.

Let me know if this helps.