mirror of
https://github.com/RIOT-OS/RIOT.git
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97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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* Copyright (C) 2017 Kaspar Schleiser <kaspar@schleiser.de>
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* Inria
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* 2020 Mesotic SAS
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup bootloaders
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* @{
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*
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* @file
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* @brief RIOT-based bootloader with USB-DFU support
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Francisco Acosta <francisco.acosta@inria.fr>
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* @author Dylan Laduranty <dylan.laduranty@mesotic.com>
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*
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* @}
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*/
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#include "cpu.h"
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#include "panic.h"
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#include "riotboot/slot.h"
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#include "riotboot/usb_dfu.h"
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#include "ztimer.h"
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#include "riotboot/bootloader_selection.h"
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#ifdef BTN_BOOTLOADER_PIN
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#include "periph/gpio.h"
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#endif
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static bool _bootloader_alternative_mode(void)
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{
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#if defined (BTN_BOOTLOADER_PIN) && defined (BTN_BOOTLOADER_MODE)
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bool state;
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gpio_init(BTN_BOOTLOADER_PIN, BTN_BOOTLOADER_MODE);
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state = gpio_read(BTN_BOOTLOADER_PIN);
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/* If button configures w/ internal or external pullup, then it is an
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active-low, thus reverts the logic */
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if (BTN_BOOTLOADER_EXT_PULLUP || BTN_BOOTLOADER_MODE == GPIO_IN_PU ||
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BTN_BOOTLOADER_MODE == GPIO_OD_PU ) {
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return !state;
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} else {
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return state;
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}
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#else
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return false;
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#endif
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}
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void kernel_init(void)
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{
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uint32_t version = 0;
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int slot = -1;
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for (unsigned i = 0; i < riotboot_slot_numof; i++) {
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const riotboot_hdr_t *riot_hdr = riotboot_slot_get_hdr(i);
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if (riotboot_slot_validate(i)) {
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/* skip slot if metadata broken */
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continue;
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}
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if (riot_hdr->start_addr != riotboot_slot_get_image_startaddr(i)) {
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continue;
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}
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if (slot == -1 || riot_hdr->version > version) {
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version = riot_hdr->version;
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slot = i;
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}
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}
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/* Init ztimer before starting DFU mode */
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ztimer_init();
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/* Flash the unused slot if magic word is set */
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riotboot_usb_dfu_init(0);
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if (slot != -1 && !_bootloader_alternative_mode()) {
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riotboot_slot_jump(slot);
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}
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/* Nothing to boot, stay in DFU mode to flash a slot */
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riotboot_usb_dfu_init(1);
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}
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NORETURN void core_panic(core_panic_t crash_code, const char *message)
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{
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(void)crash_code;
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(void)message;
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while (1) {}
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}
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