reflow-oven-control-sw/stm-firmware/updater/updater.c

75 lines
2.2 KiB
C

/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <reflow-controller/updater/updater.h>
#include <reflow-controller/safety/safety-memory.h>
#include <reflow-controller/safety/watchdog.h>
#include <generated/updater-ram-code.bin.h>
#include <stm32/stm32f4xx.h>
#include <cmsis/core_cm4.h>
#include <stdint.h>
#include <stddef.h>
void __attribute__((noreturn)) start_updater_ram_code(void)
{
const char *updater_src = binary_blob;
char *dest_ptr = (char *)UPDATER_RAM_CODE_BASE_ADDRESS;
uint32_t *dest_ptr_words = (uint32_t *)UPDATER_RAM_CODE_BASE_ADDRESS;
uint32_t updater_size = (uint32_t)sizeof(binary_blob);
uint32_t i;
void (*reset_ptr)(void);
/* This function will never return
* because it corrupts memory by copying the ram code for updating
* Therefore we have to make sure to only use stack in this function
*/
/* Disable all IRQs and ack the watchdog */
__disable_irq();
watchdog_ack(WATCHDOG_MAGIC_KEY);
for (i = 0UL; i < updater_size; i++)
*(dest_ptr++) = *(updater_src++);
/* Load the reset vector of the RAM code */
reset_ptr = (void (*)(void))dest_ptr_words[1];
/* Move the interrupt vector table to ram code */
SCB->VTOR = UPDATER_RAM_CODE_BASE_ADDRESS;
reset_ptr();
while(1);
}
void __attribute__((noreturn)) updater_update_from_file(const char *filename)
{
struct safety_memory_boot_status status;
safety_memory_get_boot_status(&status);
status.reboot_to_bootloader = 0xFFFFFFFFUL;
safety_memory_set_boot_status(&status);
safety_memory_set_update_filename(filename);
NVIC_SystemReset();
while (1);
}