Mario Hüttel
963b1e106c
Updater RAM Code ---------------- * Ack running watchdog every 250 ms * Blink green LED every 250 ms Firmware -------- * Add RAM code loader * Reorganize initialization * Add update command to shell
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware 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 the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <reflow-controller/updater/updater.h>
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#include <reflow-controller/safety/watchdog.h>
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#include "ram-code/updater-ram-code.bin.h"
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#include <stm32/stm32f4xx.h>
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#include <cmsis/core_cm4.h>
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void __attribute__((noreturn)) start_updater(void)
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{
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const char *updater_src = binary_blob;
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char *dest_ptr = (char *)UPDATER_RAM_CODE_BASE_ADDRESS;
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uint32_t *dest_ptr_words = (uint32_t *)UPDATER_RAM_CODE_BASE_ADDRESS;
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uint32_t updater_size = (uint32_t)sizeof(binary_blob);
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uint32_t i;
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void (*reset_ptr)(void);
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/* This function will never return
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* because it corrupts memory by copying the ram code for updating
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* Therefore we have to make sure to only use stack in this function
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*/
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/* Disable all IRQs and ack the watchdog */
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__disable_irq();
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watchdog_ack(WATCHDOG_MAGIC_KEY);
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for (i = 0UL; i < updater_size; i++)
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*(dest_ptr++) = *(updater_src++);
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/* Load the reset vector of the RAM code */
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reset_ptr = (void (*)(void))dest_ptr_words[1];
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/* Move the interrupt vector table to ram code */
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SCB->VTOR = UPDATER_RAM_CODE_BASE_ADDRESS;
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reset_ptr();
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while(1);
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}
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