mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-15 22:23:21 +00:00
70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
/* 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"
|
|
|
|
// WARNING: These are only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support
|
|
extern uint32_t _eram;
|
|
#define BOOTLOADER_MAGIC 0x3B9ACA00
|
|
#define MAGIC_ADDR (uint32_t *)((intptr_t)(&_eram) - 4)
|
|
|
|
// CTRL keyboards released with bootloader version below must use RAM method. Otherwise use WDT method.
|
|
void bootloader_jump(void) {
|
|
#ifdef KEYBOARD_massdrop_ctrl
|
|
uint8_t ver_ram_method[] = "v2.18Jun 22 2018 17:28:08"; // The version to match (NULL terminated by compiler)
|
|
uint8_t *ver_check = ver_ram_method; // Pointer to version match string for traversal
|
|
uint8_t *ver_rom = (uint8_t *)0x21A0; // Pointer to address in ROM where this specific bootloader version would exist
|
|
|
|
while (*ver_check && *ver_rom == *ver_check) { // While there are check version characters to match and bootloader's version matches check's version
|
|
ver_check++; // Move check version pointer to next character
|
|
ver_rom++; // Move ROM version pointer to next character
|
|
}
|
|
|
|
if (!*ver_check) { // If check version pointer is NULL, all characters have matched
|
|
*MAGIC_ADDR = BOOTLOADER_MAGIC; // Set magic number into RAM
|
|
NVIC_SystemReset(); // Perform system reset
|
|
while (1)
|
|
; // Won't get here
|
|
}
|
|
#endif
|
|
|
|
// Set watchdog timer to reset. Directs the bootloader to stay in programming mode.
|
|
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
|
|
}
|
|
|
|
__attribute__((weak)) void mcu_reset(void) {
|
|
NVIC_SystemReset();
|
|
}
|