41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
|
/* Copyright 2021 QMK
|
||
|
|
*
|
||
|
|
* 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 3 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 <ch.h>
|
||
|
|
|
||
|
|
#define DBGMCU_KEY_UNLOCK 0x4B5A6978
|
||
|
|
#define DBGMCU_CMD_RESET 0x1
|
||
|
|
|
||
|
|
__IO uint32_t *DBGMCU_KEY = (uint32_t *)DBGMCU_BASE + 0x0CU;
|
||
|
|
__IO uint32_t *DBGMCU_CMD = (uint32_t *)DBGMCU_BASE + 0x08U;
|
||
|
|
|
||
|
|
__attribute__((weak))
|
||
|
|
void bootloader_jump(void) {
|
||
|
|
/* The MTIMER unit of the GD32VF103 doesn't have the MSFRST
|
||
|
|
* register to generate a software reset request.
|
||
|
|
* BUT instead two undocumented registers in the debug peripheral
|
||
|
|
* that allow issueing a software reset. WHO would need the MSFRST
|
||
|
|
* register anyway? Source:
|
||
|
|
* https://github.com/esmil/gd32vf103inator/blob/master/include/gd32vf103/dbg.h */
|
||
|
|
*DBGMCU_KEY = DBGMCU_KEY_UNLOCK;
|
||
|
|
*DBGMCU_CMD = DBGMCU_CMD_RESET;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Jumping to bootloader is not possible from user code. */
|
||
|
|
void enter_bootloader_mode_if_requested(void) { }
|