/*------------------------------------------------------------------------
* ttyputc - write one character to a tty device
*------------------------------------------------------------------------
*/
int ttyputc(struct devsw *devptr, unsigned char ch)
{
STATWORD ps;
struct tty *iptr;
iptr = &tty[devptr->dvminor];
if ( ch==NEWLINE && iptr->ocrlf )
ttyputc(devptr,RETURN);
disable(ps);
wait(iptr->osem); /* wait for space in queue */
iptr->obuff[iptr->ohead++] = ch;
++iptr->ocnt;
if (iptr->ohead >= OBUFLEN)
iptr->ohead = 0;
*USART[iptr->unit].UCSRB |= (1<<UDRIE0); /*ttyostart(iptr);*/
restore(ps);
return(OK);
}
//------------------------------------------------------------------------
// ttywrite - write one or more characters to a tty device
//------------------------------------------------------------------------
int
ttywrite(struct devsw *devptr, char *buff, int count)
{
struct tty *ttyp;
int ncopied;
int ps;
if (count < 0)
return SYSERR;
if (count == 0)
return OK;
ps = disable();
ttyp = &tty[devptr->minor];
count -= (ncopied = writecopy(buff, ttyp, count));
buff += ncopied;
for (; count > 0; count--)
ttyputc(devptr, *buff++);
restore(ps);
return OK;
}
/*------------------------------------------------------------------------
* ttywrite - write one or more characters to a tty device
*------------------------------------------------------------------------
*/
int ttywrite(struct devsw *devptr, unsigned char *buff, int count)
{
STATWORD ps;
register struct tty *ttyp;
int ncopied;
if (count < 0)
return(SYSERR);
if (count == 0)
return(OK);
disable(ps);
ttyp = &tty[devptr->dvminor];
count -= (ncopied = writcopy(buff, ttyp, count));
buff += ncopied;
for ( ; count>0 ; count--) {
ttyputc(devptr, *buff++);
}
restore(ps);
return(OK);
}
