BUGFIX: fix issue 6 to really disable watchdog timer

[pub/USBaspLoader.git] / firmware / main.c

diff --git a/firmware/main.c b/firmware/main.c
index 87f0641..bd36e06 100644 (file)
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -644,6 +644,15 @@ int __attribute__((__noreturn__)) main(void)
 #endif
     if(bootLoaderCondition()){
 #if NEED_WATCHDOG
+#      if (defined(MCUSR) && defined(WDRF))
+       /* 
+        * Fix issue 6: (special thanks to coldtobi)
+        * 
+        * The WDRF bit in the MCUSR needs to be cleared first,
+        * otherwise it is not possible to disable the watchdog
+        */
+       MCUSR &= ~(_BV(WDRF));
+#      endif
        wdt_disable();    /* main app may have enabled watchdog */
 #endif
         initForUsbConnectivity();