Unsupported C Functions

If you create your own custom I/O driver blocks, you should first check for C functions that are supported by Real-Time Windows Target software. Functions that use the Windows operating system are not supported by Real-Time Windows Target software. This is because the kernel intercepts the system clock and first runs the real-time application. If there is time left before the next sample time, the kernel might allow a Windows based application or function to run.

The following list includes many, but not all, of the unsupported functions:

• File I/O — fopen, freopen, fclose, fread, fwrite, fputs, fputc, fgets, fgetc, gets, getc, getchar, puts, putc, putchar, fflush, setbuf, setvbuf

• Console I/O — printf, fprintf, sprintf, vfprintf, vprintf, vsprintf, fscanf, scanf, sscanf

• Process management — spawn, exit, abort, atexit

• Signals and exceptions — signal, longimp, raise

• Time functions — clock, time, difftime, asctime, ctime, difftime, gmtime, localtime, mktime, strftime

• Win32 API functions — No Windows API functions are supported.

Incompatibility with Win32 API Calls

Supported C Functions

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS