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/* Copyright 2017 Fred Sundvik
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "bootloader.h"
#include "samd51j18a.h"
//Set watchdog timer to reset. Directs the bootloader to stay in programming mode.
void bootloader_jump(void)
{
//Keyboards released with certain bootloader can not enter bootloader from app until workaround is created
uint8_t ver_no_jump[] = "v2.18Jun 22 2018 17:28:08";
uint8_t *ver_check = ver_no_jump;
uint8_t *boot_check = (uint8_t *)0x21A0;
while (*ver_check && *boot_check == *ver_check)
{
ver_check++;
boot_check++;
}
if (!*ver_check)
{
//Version match
//Software workaround would go here
return; //No software restart method implemented... must use hardware reset button
}
WDT->CTRLA.bit.ENABLE = 0;
while (WDT->SYNCBUSY.bit.ENABLE) {}
while (WDT->CTRLA.bit.ENABLE) {}
WDT->CONFIG.bit.WINDOW = 0;
WDT->CONFIG.bit.PER = 0;
WDT->EWCTRL.bit.EWOFFSET = 0;
WDT->CTRLA.bit.ENABLE = 1;
while (WDT->SYNCBUSY.bit.ENABLE) {}
while (!WDT->CTRLA.bit.ENABLE) {}
while (1) {} //Wait on timeout
}
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