bootloader.c File Reference

This file contains the bootloader implementation including firmware verification, flash programming, checksum validation, and application launch functions. More...

#include "bootloader.h"
#include "board.h"
#include "crc.h"
#include "ff.h"
#include "flash.h"
#include "led.h"
#include "log.h"
#include "mcu_hal.h"
#include "sd_diskio.h"
#include "sd_fatfs.h"
#include "sdmmc.h"
#include "systick.h"
#include <errno.h>
#include <stdlib.h>

Go to the source code of this file.

Typedefs
typedef void(*	Function) (void)

Functions
static bool	CheckApplicationSize (void)
	Check whether the application binary on the SD card fits into the available flash memory region designated for the application. More...
static bool	CheckApplicationCrc (void)
	Validate the integrity of the application binary by comparing a CRC-32 value calculated over the file contents against the reference CRC value read from a separate file on the SD card. More...
static bool	UpdateApplication (void)
	Erase the application flash region and program it with the contents of the application binary file from the SD card, page by page. More...
static bool	VerifyApplication (void)
	Verify the programmed flash contents against the original application binary file on the SD card by performing a word-by-word comparison. More...
static bool	CalculateCrcOfFile (uint32_t *const crc)
	Calculate the CRC-32 checksum of the application binary file on the SD card using the hardware CRC peripheral. More...
static bool	ReadCrcFromFile (uint32_t *const crc)
	Read the expected CRC-32 value from a dedicated CRC file on the SD card and convert the hexadecimal string representation to an integer. More...
bool	BootloaderUpdateFirmware (void)
	This function performs the complete application update procedure. More...
bool	BootloaderCheckForApplication (void)
	This function checks whether a valid application exists in flash. More...
void	BootloaderJumpToApplication (void)
	This function performs the jump to the user application in flash. More...
void	BootloaderJumpToSysMem (void)
	This function performs the jump to the microcontroller System Memory (ST built-in bootloader). More...

Variables
static uint8_t	readBuffer [FLASH_PAGE_SIZE] = {0}

Detailed Description

This file contains the bootloader implementation including firmware verification, flash programming, checksum validation, and application launch functions.

STM32 Bootloader

Author

Akos Pasztor

Copyright

(c) 2026 Akos Pasztor. https://akospasztor.com This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component.

Definition in file bootloader.c.