47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* Copyright 2021 QMK
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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 3 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 <ch.h>
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#include <hal.h>
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#define DBGMCU_KEY_UNLOCK 0x4B5A6978
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#define DBGMCU_CMD_RESET 0x1
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__IO uint32_t *DBGMCU_KEY = (uint32_t *)DBGMCU_BASE + 0x0CU;
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__IO uint32_t *DBGMCU_CMD = (uint32_t *)DBGMCU_BASE + 0x08U;
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__attribute__((weak)) void bootloader_jump(void) {
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/* The MTIMER unit of the GD32VF103 doesn't have the MSFRST
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* register to generate a software reset request.
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* BUT instead two undocumented registers in the debug peripheral
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* that allow issueing a software reset. WHO would need the MSFRST
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* register anyway? Source:
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* https://github.com/esmil/gd32vf103inator/blob/master/include/gd32vf103/dbg.h */
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*DBGMCU_KEY = DBGMCU_KEY_UNLOCK;
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*DBGMCU_CMD = DBGMCU_CMD_RESET;
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}
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__attribute__((weak)) void mcu_reset(void) {
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// Confirmed by karlk90, there is no actual reset to bootloader.
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// This just resets the controller.
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*DBGMCU_KEY = DBGMCU_KEY_UNLOCK;
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*DBGMCU_CMD = DBGMCU_CMD_RESET;
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}
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/* Jumping to bootloader is not possible from user code. */
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void enter_bootloader_mode_if_requested(void) {}
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