MATLAB XPC TARGET RELEASE NOTES Guida Utente Scaricare il pdf (Pagina 345)

100

101

fopen

Open the file for reading and writing. Initially, the file pointer is at

thebeginningofthefile. Themethoddoesnothingifthefiledoes

not already exist.

•

'w+'

Openthefileforreadingandwriting. Themethodemptiesthefile

first, if the file already exists and has content, and places the file

pointer at the beginning of the file. The method creates the file if

it does not already exist.

•

'a+'

Open the file for rea ding and appen ding to the file. Initially , the file

pointer is at the beginning of the file. 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.Youuse

file_ID as the first argum ent to the other file I/O methods (such as

fclose, fread,andfwrite).

Examples Open the file dat a.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,andfwrite.

MATLAB

fopen function.

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MATLAB XPC TARGET RELEASE NOTES Guida Utente Pagina 345

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