altosuilib: Wait for Windows to get ready with new device

Windows appears to report the new device path long before
the path is actually usable. Stick some long delays trying to
open the device before giving up.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/altosuilib/AltosFlashUI.java b/altosuilib/AltosFlashUI.java
index 37ab96614af52f73d4ab116aa9c39f9d457f480e..7186e91b33024f14fc7c1e21d3c0dda5f99a6cfe 100644 (file)
--- a/altosuilib/AltosFlashUI.java
+++ b/altosuilib/AltosFlashUI.java
@@ -481,12 +481,24 @@ public class AltosFlashUI
                public void run () {
                        try {
                                AltosLink link = null;
+                               boolean new_device = false;
 
                                for (;;) {
                                        System.out.printf("Attempting to open %s\n", device.toShortString());
 
-                                       link = new AltosSerial(device);
+                                       for (int i = 0; i < 20; i++) {
+                                               link = new AltosSerial(device);
 
+                                               if (link != null)
+                                                       break;
+
+                                               if (!new_device)
+                                                       break;
+
+                                               System.out.printf("Waiting for device to become ready\n");
+
+                                               Thread.sleep(1000);
+                                       }
                                        if (link == null)
                                                throw new IOException(String.format("%s: open failed",
                                                                                    device.toShortString()));
@@ -536,6 +548,7 @@ public class AltosFlashUI
                                                        if (!matched) {
                                                                System.out.printf("Identified new device %s\n", d.toShortString());
                                                                device = (AltosUSBDevice) d;
+                                                               new_device = true;
                                                                break;
                                                        }
                                                }