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- /*** LISTING 6 ***/
- /*** ***/
- /*** sout.c ***/
- /*** **************************************** ***/
- /*** OUTPUT A CHARACTER TO SERIAL PORT ***/
- /*** **************************************** ***/
- #include "serial.h"
- #include <time.h>
-
- extern int portbase;
-
- int SerialOut (char Char_Value)
- {
- clock_t start, timeout;
-
- start = (clock());
-
- while((inp(portbase + LSR) & XMTRDY) == 0)
- {
- timeout = (clock());
-
- if((timeout-start) > 1)
- {
- return(-1);
- }
- }
-
- outp(portbase + TXR,Char_Value);
- return (0);
- }