altosui: Retry device enumeration after rebooting for self flash

Windows takes 'a while' to include the rebooted device in the list of
available devices, so try a few times with a 100ms delay so that we
can avoid asking the user to select from an empty list.

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

1 files changed, 10 insertions, 2 deletions

diff --git a/altosui/AltosFlashUI.java b/altosui/AltosFlashUI.java
index 5913e506..793a8af3 100644
--- a/altosui/AltosFlashUI.java
+++ b/altosui/AltosFlashUI.java
@@ -377,7 +377,15 @@ public class AltosFlashUI
 			while (!link.is_loader()) {
 				link.to_loader();
 
-				java.util.List<AltosDevice> devices = AltosUSBDevice.list(AltosLib.product_altusmetrum);
+				java.util.List<AltosDevice> devices = null;
+
+				for (int tries = 0; tries < 10; tries++) {
+					Thread.sleep(100);
+					devices = AltosUSBDevice.list(AltosLib.product_altusmetrum);
+					if (devices.size() != 0)
+						break;
+				}
+
 				if (devices.size() == 1)
 					device = devices.get(0);
 				else {
@@ -429,4 +437,4 @@ public class AltosFlashUI
 
 		frame = in_frame;
 	}
-}
\ No newline at end of file
+}