From 0a69d10b37a782db2220b4f98adf6c2725f2d913 Mon Sep 17 00:00:00 2001
From: Zach Eveland <zeveland@blacklabel-development.com>
Date: Mon, 31 Oct 2011 21:36:29 -0400
Subject: check to see if a sketch has been loaded before jumping out of 
 bootloader

---
 bootloaders/diskloader/src/DiskLoader.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'bootloaders/diskloader/src/DiskLoader.cpp')

diff --git a/bootloaders/diskloader/src/DiskLoader.cpp b/bootloaders/diskloader/src/DiskLoader.cpp
index 30ac1b6..2792bc6 100644
--- a/bootloaders/diskloader/src/DiskLoader.cpp
+++ b/bootloaders/diskloader/src/DiskLoader.cpp
@@ -109,6 +109,9 @@ const u8 _consts[] =
 
 void start_sketch()
 {
+	if (pgm_read_word(0) == -1)		// no sketch has been uploaded yet - stay in bootloader
+		return;
+	
 	L_LED_OFF();
 	RX_LED_OFF();
 	TX_LED_OFF();
-- 
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