fsFileExists (Function)

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Architecture:

X32 / NX32 / NX32L

Device support:

All

Firmware version:

1.00 / 1.00.00


This will query if a file already exists.

 

 

Input:                

name : STRING

Name of the file to query. Both absolute and relative paths are allowed.

 

Returns: BOOL

TRUE:

File does exist.

FALSE:

File does not exist.

 

Declaration:

FUNCTION fsFileExists : BOOL;
VAR_INPUT
  name : STRING;
END_VAR;

 

 

Example:

...
IF fsFileExists(name := "gpslog.dat") THEN
  fd := fsFileOpen(name := "gpslog.dat");
ELSE
  fd := fsFileCreate(name := "gpslog.dat");
END_IF;
IF fsFileStatus(fd := fd) = 0 THEN
  // File open, write data
  ...
  fsFileWrite(fd := fd, buffer := ADDR(gps.latitude), length := SIZEOF(gps.latitude));
  fsFileWrite(fd := fd, buffer := ADDR(gps.longitude), length := SIZEOF(gps.longitude));
  ...
  fsFileClose(fd := fd);
ELSE
  // Error when opening/creating file
  ...
END_IF;
...