Call a DLL function with argument type as unsigned char *

[Bhavik]

Hello,

I am a newbie to the python language, and I need to call a DLL
function from the python program.
The DLL function has following prototype:

unsigned int DLLFunction(unsigned char *, unsigned int);

Now, I need to declare an array of 6 bytes in the python, and pass
that array as the first argument to the DLL function. I tried some
methods mentioned on the Internet, but it gives error like "can not
convert argument 1".

Can someone tell me how to do this?

Thanks for the help.

 

[Bhavik]

Just to clarify, I am using Python 2.5.1

 

[Steve Holden]

Just to clarify, I am using Python 2.5.1

Take a look at the ctypes module, which allows you to do such things (at
the risk of segmentation faults and the like if you get your calls wrong).

regards
Steve

 

[ratiafak]

Hi,
same problem with python-ftdi.
I get: "TypeError: in method 'ftdi_write_data', argument 2 of type 'unsigned char *'"
I have tried ctypes without succes. type(addressof(c_ubyte)) is int, and there isn't any c_ubyte_p.
Am I doing something wrong or is there any way to cheat it?