[gnoduino: 203/237] check to see if a sketch has been loaded before jumping out of bootloader

[Lucian Langa <lucilanga src gnome org>]

commit 88605c62353b9599b1522232807776e04fc0eeb3
Author: Zach Eveland <zeveland blacklabel-development com>
Date:   Mon Oct 31 21:36:29 2011 -0400

    check to see if a sketch has been loaded before jumping out of  bootloader

 .../bootloaders/diskloader/DiskLoader-Leonardo.hex |  297 ++++++++++----------
 arduino/bootloaders/diskloader/src/DiskLoader.cpp  |    3 +
 2 files changed, 152 insertions(+), 148 deletions(-)
---
diff --git a/arduino/bootloaders/diskloader/DiskLoader-Leonardo.hex b/arduino/bootloaders/diskloader/DiskLoader-Leonardo.hex
index b5b257f..0e2c445 100644
--- a/arduino/bootloaders/diskloader/DiskLoader-Leonardo.hex
+++ b/arduino/bootloaders/diskloader/DiskLoader-Leonardo.hex
@@ -1,6 +1,6 @@
 :10700000BDC00000E0C00000DEC00000DCC0000029
 :10701000DAC00000D8C00000D6C00000D4C0000014
-:10702000D2C00000D0C00000BCC300002EC40000CD
+:10702000D2C00000D0C00000C4C3000036C40000BD
 :10703000CAC00000C8C00000C6C00000C4C0000034
 :10704000C2C00000C0C00000BEC00000BCC0000044
 :10705000BAC00000B8C00000B6C00000B4C0000054
@@ -9,7 +9,7 @@
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 :107090009AC0000098C0000096C0000094C0000094
 :1070A00092C0000090C000008EC0000011241FBEDE
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 :1070C0000100090400000102020000052400100173
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 :1070E000810310004009040100020A0000000705A6
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+:107A4000E7E7F1E791E031E026E39093E900309336
+:107A5000EB0084918093EC002093ED009F5F3196C2
+:107A6000943099F78EE78093EA001092EA008B81B8
+:107A70008093900114C08F8198851092E900109234
+:107A800092011092910190939401809393018D81C2
+:107A9000882349F4CE010196A1DB882321F08EEFE3
+:107AA0008093E80007C081E28093EB0003C0E4E626
+:107AB000F1E7B1CF6196DEBFCDBFCF91DF91FF91EE
+:107AC000EF91BF91AF919F918F917F916F915F9156
+:107AD0004F913F912F911F91FF90EF900F900FBE0C
+:107AE0000F901F901895EE0FFF1F0590F491E02D59
+:067AF0000994F894FFCF99
+:087AF60000E1000000000000A7
 :040000030000700089
 :00000001FF
diff --git a/arduino/bootloaders/diskloader/src/DiskLoader.cpp b/arduino/bootloaders/diskloader/src/DiskLoader.cpp
index 30ac1b6..2792bc6 100644
--- a/arduino/bootloaders/diskloader/src/DiskLoader.cpp
+++ b/arduino/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();