Tag for the LUFA-120730-BETA release.

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

diff --git a/Bootloaders/DFU/BootloaderDFU.c b/Bootloaders/DFU/BootloaderDFU.c
index f5c8d17..fcacf76 100644 (file)
--- a/Bootloaders/DFU/BootloaderDFU.c
+++ b/Bootloaders/DFU/BootloaderDFU.c
@@ -97,7 +97,7 @@ static uint16_t EndAddr = 0x0000;
  *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
  *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
  */
-uint32_t MagicBootKey ATTR_NO_INIT;
+uint16_t MagicBootKey ATTR_NO_INIT;
 
 
 /** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
@@ -106,8 +106,29 @@ uint32_t MagicBootKey ATTR_NO_INIT;
  */
 void Application_Jump_Check(void)
 {
+       bool JumpToApplication = false;
+
+       #if ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
+               /* Disable JTAG debugging */
+               JTAG_DISABLE();
+
+               /* Enable pull-up on the JTAG TCK pin so we can use it to select the mode */
+               PORTF |= (1 << 4);
+               Delay_MS(10);
+
+               /* If the TCK pin is not jumpered to ground, start the user application instead */
+               JumpToApplication |= ((PINF & (1 << 4)) != 0);
+
+               /* Re-enable JTAG debugging */
+               JTAG_ENABLE();
+       #endif
+
        /* If the reset source was the bootloader and the key is correct, clear it and jump to the application */
        if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
+         JumpToApplication |= true;
+
+       /* If a request has been made to jump to the user application, honor it */
+       if (JumpToApplication)
        {
                /* Turn off the watchdog */
                MCUSR &= ~(1<<WDRF);
@@ -130,23 +151,6 @@ int main(void)
        /* Configure hardware required by the bootloader */
        SetupHardware();
 
-       #if ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
-       /* Disable JTAG debugging */
-       MCUCR |= (1 << JTD);
-       MCUCR |= (1 << JTD);
-
-       /* Enable pull-up on the JTAG TCK pin so we can use it to select the mode */
-       PORTF |= (1 << 4);
-       Delay_MS(10);
-
-       /* If the TCK pin is not jumpered to ground, start the user application instead */
-       RunBootloader = (!(PINF & (1 << 4)));
-
-       /* Re-enable JTAG debugging */
-       MCUCR &= ~(1 << JTD);
-       MCUCR &= ~(1 << JTD);
-       #endif
-
        /* Turn on first LED on the board to indicate that the bootloader has started */
        LEDs_SetAllLEDs(LEDS_LED1);