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