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/* 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>
#include <hal.h>
#include "wait.h"
#include "gpio.h"
#define APP_ADDRESS 0x08002000
__attribute__((weak)) void bootloader_jump(void) {
// The ignition bootloader is checking for a high signal on A8 for 100ms when powering on the board.
// Setting both A8 and A9 high will charge the capacitor quickly.
// Setting A9 low before reset will cause the capacitor to discharge
// thus making the bootloder unlikely to trigger twice between power cycles.
setPinOutputPushPull(A9);
setPinOutputPushPull(A8);
writePinHigh(A9);
writePinHigh(A8);
wait_ms(500);
writePinLow(A9);
NVIC_SystemReset();
}
__attribute__((weak)) void mcu_reset(void) {
// When resetting the MCU, we want to jump to the application.
SCB->AIRCR = APP_ADDRESS & 0xFFFF;
// Set the stack pointer to the applications stack pointer
__asm__ volatile("msr msp, %0" ::"g"(*(volatile uint32_t *)APP_ADDRESS));
// Jump to the application
(*(void (**)())(APP_ADDRESS + 4))();
while (1)
;
}
__attribute__((weak)) void enter_bootloader_mode_if_requested(void) {}
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