From 14783eadc22b419b2f87c80aa7eba0062d4862db Mon Sep 17 00:00:00 2001
From: Michal Moskal <michal@moskal.me>
Date: Wed, 26 Jul 2017 19:14:12 +0100
Subject: [PATCH] Workaround UF2 driver problems by repeating the file 3 times

---
 editor/extension.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/editor/extension.ts b/editor/extension.ts
index e00cd2d4..6c475c3a 100644
--- a/editor/extension.ts
+++ b/editor/extension.ts
@@ -72,7 +72,8 @@ namespace pxt.editor {
         let r = UF2.concatFiles([elfUF2, mkFile(".rbf", rbfBIN)])
         let data = UF2.serializeFile(r)
 
-        resp.outfiles[pxtc.BINARY_UF2] = btoa(data)
+        // we repeat the file three times to minimze problems with failed writes
+        resp.outfiles[pxtc.BINARY_UF2] = btoa(data + data + data)
 
         let saveUF2Async = () => {
             if (isCli || !pxt.commands.saveOnlyAsync) {