From a6e8d7e0337571a181cb2c0ccefb8ca219d3df62 Mon Sep 17 00:00:00 2001
From: optixx <david@optixx.org>
Date: Wed, 2 Sep 2009 21:34:10 +0200
Subject: [PATCH] check bootloader enalbe io line

---
 avr/bootloader/bootloader.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/avr/bootloader/bootloader.c b/avr/bootloader/bootloader.c
index b09a1f6..874e184 100644
--- a/avr/bootloader/bootloader.c
+++ b/avr/bootloader/bootloader.c
@@ -33,6 +33,10 @@
 #include "config.h"
 #include "usbdrv/usbdrv.c"
 
+
+
+
+
 /*
  * USBasp requests, taken from the original USBasp sourcecode 
  */
@@ -74,6 +78,10 @@
                   (LED_DIR ^= (1 << LED_PIN)));}
 
 
+#define AVR_BTLDR_EN_PORT	    PORTC
+#define AVR_BTLDR_EN_DIR	    DDRC
+#define AVR_BTLDR_EN_PIN	    PC1
+#define AVR_BTLDR_EN_IN	        PINC
 
 
 /*
@@ -449,6 +457,18 @@ int __attribute__ ((noreturn, OS_main)) main(void)
     uint16_t delay = 0;
     timeout = TIMEOUT;
 
+    DDRC &= ~(1 << AVR_BTLDR_EN_PIN);	    
+    PORTC &= ~(1 << AVR_BTLDR_EN_PIN);	    
+
+    if ((AVR_BTLDR_EN_IN & ( 1 << AVR_BTLDR_EN_PIN)) == 0){
+        banner();
+        uart_puts("Bootloader flashing is disabled\n\r");
+        MCUSR = 0;
+        leave_bootloader();
+        
+    }
+    	    
+
 
     /*
      * if power-on reset, quit bootloader via watchdog reset