1991/1003/gnot/devduart.c (diff list | history)

1991/0614/sys/src/9/gnot/devduart.c:98,106 – 1991/1003/sys/src/9/gnot/devduart.c:98,104 (short | long | prev | next)
1991/0605		Queue *wq; /* write queue */ Rendez r; /* kproc waiting for input */ Alarm *a; /* alarm for waking the kernel process */ int delay; /* between character input and waking kproc */ int kstarted; /* kproc started */
1991/0606		uchar delim[256/8]; /* characters that act as delimiters */
1991/0605		}; Duartport duartport[1];
1991/0614/sys/src/9/gnot/devduart.c:424,434 – 1991/1003/sys/src/9/gnot/devduart.c:422,440
1991/0605		(*cq->putc)(cq, ch); else { putc(cq, ch);
1991/0606		if(dp->delim[ch/8] & (1<<(ch&7)) )
1991/0605		wakeup(&cq->r); } }
1991/1003		void duartclock(void) { Duartport *dp = duartport; IOQ *cq;
1991/0605
1991/1003		cq = dp->iq; if(cangetc(cq)) wakeup(&cq->r); }
1991/0605		/* * a serial line output interrupt */
1991/0614/sys/src/9/gnot/devduart.c:606,612 – 1991/1003/sys/src/9/gnot/devduart.c:612,617
1991/0605		duartbaud(baud); } static void duarttimer(Alarm*); static int duartputc(IOQ *, int); static void duartstopen(Queue*, Stream*); static void duartstclose(Queue*);
1991/0614/sys/src/9/gnot/devduart.c:621,659 – 1991/1003/sys/src/9/gnot/devduart.c:626,632
1991/0605		"duart" }; /* * wakeup the helper process to do input */ static void duarttimer(Alarm *a) { Duartport *dp = a->arg;                  cancel(a); dp->a = 0; wakeup(&dp->iq->r); }                  static int duartputc(IOQ *cq, int ch) { Duartport *dp = cq->ptr; int r;                  r = putc(cq, ch);                  /* * pass upstream within dp->delay milliseconds */ if(dp->a==0){ if(dp->delay == 0) wakeup(&cq->r); else dp->a = alarm(dp->delay, duarttimer, dp); } return r; }                  static void duartstopen(Queue *q, Stream *s) { Duartport *dp;
1991/0614/sys/src/9/gnot/devduart.c:667,679 – 1991/1003/sys/src/9/gnot/devduart.c:640,647
1991/0605		dp->wq = WR(q); WR(q)->ptr = dp; RD(q)->ptr = dp; dp->delay = 64; dp->iq->putc = duartputc; qunlock(dp); /* start with all characters as delimiters */ memset(dp->delim, 1, sizeof(dp->delim));                  if(dp->kstarted == 0){ dp->kstarted = 1; sprint(name, "duart%d", s->id);
1991/0614/sys/src/9/gnot/devduart.c:733,740 – 1991/1003/sys/src/9/gnot/devduart.c:701,707
1991/0605		break; case 'W': case 'w': if(n>=0 && n<1000) dp->delay = n;
1991/1003		/* obsolete */
1991/0605		break; } }else while((m = BLEN(bp)) > 0){