1991/1003/port/devscc.c (diff list | history)

1991/0727/sys/src/9/port/devscc.c:99,107 – 1991/1003/sys/src/9/port/devscc.c:99,105 (short | long | prev | next)
1991/0601		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 */
1991/0601		}; SCC scc[2];
1991/0727/sys/src/9/port/devscc.c:293,303 – 1991/1003/sys/src/9/port/devscc.c:291,298
1991/0601		ch = *sp->data; if(cq->putc) (*cq->putc)(cq, ch); else {
1991/1003		else
1991/0601		putc(cq, ch);
1991/0606		if(sp->delim[ch/8] & (1<<(ch&7)) )
1991/0601		wakeup(&cq->r); } } } if(x & TxPendB){
1991/0727/sys/src/9/port/devscc.c:324,329 – 1991/1003/sys/src/9/port/devscc.c:319,337
1991/0601		sccintr0(&scc[0], x>>3); }
1991/1003		void sccclock(void) { SCC *sp; IOQ *cq; for(sp = scc; sp < &scc[2]; sp++){ cq = sp->iq; if(sp->wq && cangetc(cq)) wakeup(&cq->r); } }
1991/0601		/* * turn on a port's interrupts. set DTR and RTS */
1991/0727/sys/src/9/port/devscc.c:380,386 – 1991/1003/sys/src/9/port/devscc.c:388,393
1991/0727		}
1991/0601		} static void scctimer(Alarm*); static int sccputc(IOQ *, int); static void sccstopen(Queue*, Stream*); static void sccstclose(Queue*);
1991/0727/sys/src/9/port/devscc.c:395,433 – 1991/1003/sys/src/9/port/devscc.c:402,408
1991/0601		"scc" }; /* * create a helper process per port */ static void scctimer(Alarm *a) { SCC *sp = a->arg;                  cancel(a); sp->a = 0; wakeup(&sp->iq->r); }                  static int sccputc(IOQ *cq, int ch) { SCC *sp = cq->ptr; int r;                  r = putc(cq, ch);                  /* * pass upstream within sp->delay milliseconds */ if(sp->a==0){ if(sp->delay == 0) wakeup(&cq->r); else sp->a = alarm(sp->delay, scctimer, sp); } return r; }                  static void sccstopen(Queue *q, Stream *s) { SCC *sp;
1991/0727/sys/src/9/port/devscc.c:440,452 – 1991/1003/sys/src/9/port/devscc.c:415,422
1991/0601		sp->wq = WR(q); WR(q)->ptr = sp; RD(q)->ptr = sp; sp->delay = 64; sp->iq->putc = sccputc; qunlock(sp); /* start with all characters as delimiters */ memset(sp->delim, 1, sizeof(sp->delim));                  if(sp->kstarted == 0){ sp->kstarted = 1; sprint(name, "scc%d", s->id);
1991/0727/sys/src/9/port/devscc.c:507,514 – 1991/1003/sys/src/9/port/devscc.c:477,483
1991/0601		break; case 'W': case 'w': if(n>=0 && n<1000) sp->delay = n;
1991/1003		/* obsolete */
1991/0601		break; } }else while((m = BLEN(bp)) > 0){