tools/: added interrupt_wait support to atnet and atrf-proxy (untested)

- atrf-proxy/PROTOCOL: WAIT is now implemented and takes a timeout
  argument
- atrf-proxy/atrf-proxy.c (cmd_more): implemented WAIT command using
  atrf_interrupt_wait
- lib/atnet.c (atnet_interrupt_wait, atnet_driver): added
  interrupt_wait (using WAIT)

tools/atrf-proxy/PROTOCOL

@@ -60,8 +60,8 @@ POLL
 +0|1
 -message
 
-WAIT
-+0|1
+WAIT timeout_ms
++value
 -message
 
 
@@ -84,8 +84,9 @@ The device is implicitly opened when establishing a TCP session. The
 device is implicitly closed when closing the TCP session.
 
 
-Asynchrous interrupt notification (not implemented yet)
+Asynchrous interrupt notification
 ---------------------------------
 
 The WAIT command is not answered until an interrupt or another command is
-received. WAIT returns the interrupt status, just like POLL.
+received. WAIT returns the value of the IRQ_STATUS register. If WAIT
+times out before receiving an interrupt, it returns 0.

tools/atrf-proxy/atrf-proxy.c

@@ -168,6 +168,18 @@ static int cmd_more(struct atrf_dsc *dsc, struct netio *netio, const char *cmd)
 			return netio_printf(netio, "-I/O error\n");
 		return netio_printf(netio, "+0x%02x\n", res);
 	}
+	if (!strcasecmp(cmd, "wait")) {
+		uint8_t res;
+
+		if (!n)
+			n = 1;
+		res = atrf_interrupt_wait(dsc, n);
+		if (atrf_error(dsc))
+			return netio_printf(netio, "-I/O error\n");
+		if (res < 0)
+			return netio_printf(netio, "-not supported\n");
+		return netio_printf(netio, "+0x%02x\n", res);
+	}
 	if (!strcasecmp(cmd, "getram")) {
 		uint8_t res;