/** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
* start key has been loaded into \ref MagicBootKey. If the bootloader started via the watchdog and the key is valid,
* this will force the user application to start via a software jump.
*/
void Application_Jump_Check(void)
{
bool JumpToApplication = false;
#if (BOARD == BOARD_LEONARDO)
/* Enable pull-up on the IO13 pin so we can use it to select the mode */
PORTC |= (1 << 7);
Delay_MS(10);
/* If IO13 is not jumpered to ground, start the user application instead */
JumpToApplication |= ((PINC & (1 << 7)) != 0);
/* Disable pull-up after the check has completed */
PORTC &= ~(1 << 7);
#elif ((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))
{
MagicBootKey = 0;
JumpToApplication = true;
}
if (JumpToApplication)
{
// cppcheck-suppress constStatement
((void (*)(void))0x0000)();
}
}
/** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
* start key has been loaded into \ref MagicBootKey. If the bootloader started via the watchdog and the key is valid,
* this will force the user application to start via a software jump.
*/
void Application_Jump_Check(void) // FIXME: update to the 2015 version where (maybe?) is more reliable the checks
{
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);
wdt_disable();
/* Clear the boot key and jump to the user application */
MagicBootKey = 0;
// cppcheck-suppress constStatement
((void (*)(void))0x0000)();
}
}
/** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
* start key has been loaded into \ref MagicBootKey. If the bootloader started via the watchdog and the key is valid,
* this will force the user application to start via a software jump.
*/
void Application_Jump_Check(void)
{
bool JumpToApplication = false;
#if (BOARD == BOARD_LEONARDO)
/* Enable pull-up on the IO13 pin so we can use it to select the mode */
PORTC |= (1 << 7);
Delay_MS(10);
/* If IO13 is not jumpered to ground, start the user application instead */
JumpToApplication = ((PINC & (1 << 7)) != 0);
/* Disable pull-up after the check has completed */
PORTC &= ~(1 << 7);
#elif ((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();
#else
/* Check if the device's BOOTRST fuse is set */
if (boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS) & FUSE_BOOTRST)
{
/* If the reset source was not an external reset or the key is correct, clear it and jump to the application */
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) */
bool ApplicationValid = (pgm_read_word_near(0) != 0xFFFF);
/* If a request has been made to jump to the user application, honor it */
if (JumpToApplication && ApplicationValid)
{
/* Turn off the watchdog */
MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Clear the boot key and jump to the user application */
MagicBootKey = 0;
// cppcheck-suppress constStatement
((void (*)(void))0x0000)();
}
}
