MATLAB XPC TARGET 4 - API GUIDE Guide de l'utilisateur télécharger pdf (Page 268)

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101

fopen

14-24

14fopen

Purpose Open target PC file for reading

Syntax MATLAB command line

file_ID = fopen(file_obj,'file_name')

file_ID = file_obj.fopen('file_name')

file_ID = fopen(file_obj,'file_name',permission)

file_ID = file_obj.fopen('file_name',permission)

Arguments

Description Method of xpctarget.fs objects. From the host PC, opens the specified

filename on the target PC for binary access.

The permission argument values are

•

'r' to open the file for reading (default)

•

'w' to open the file for writing. The method creates the file if it does not

already exist.

You cannot have more than eight files open in the file system. This method

returns the file identifier for the open file in

file_ID. You use file_ID as the

first argument to the other file I/O methods (such as

fclose, fread, and

fwrite).

Examples Open the file data.dat in the target PC file system object fsys. Assign the

resulting file handle to a variable for reading.

h = fopen(fsys,'data.dat') or fsys.fopen('data.dat')

ans =

2883584

d = fread(h);

See Also xPC Target file object methods fclose, fread, and fwrite.

MATLAB

fopen function.

file_obj

Name of the xpctarget.fs object.

'file_name'

Name of the target PC to open.

permission

Values are 'r' or 'w'. This argument is optional

with

'r' as the default value.

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MATLAB XPC TARGET 4 - API GUIDE Guide de l'utilisateur Page 268

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