Fix bootloaders not starting user application if the HWB is grounded during watchdog...

[pub/lufa.git] / Bootloaders / DFU / BootloaderDFU.c

diff --git a/Bootloaders/DFU/BootloaderDFU.c b/Bootloaders/DFU/BootloaderDFU.c
index cebc0f4..c735fda 100644 (file)
--- a/Bootloaders/DFU/BootloaderDFU.c
+++ b/Bootloaders/DFU/BootloaderDFU.c
@@ -139,8 +139,19 @@ void Application_Jump_Check(void)
                        if (!(MCUSR & (1 << EXTRF)) || (MagicBootKey == MAGIC_BOOT_KEY))
                          JumpToApplication = true;
 
+                       /* Clear reset source */
                        MCUSR &= ~(1 << EXTRF);
                }
+               else
+               {
+                       /* If the reset source was the bootloader and the key is correct, clear it and jump to the application;
+                        * this can happen in the HWBE fuse is set, and the HBE pin is low during the watchdog reset */
+                       if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
+                               JumpToApplication = true;
+
+                       /* Clear reset source */
+                       MCUSR &= ~(1 << WDRF);
+               }
        #endif
 
        /* Don't run the user application if the reset vector is blank (no app loaded) */