stm32 hal库 bootloader详细程序代码

下面是一个基于STM32 HAL库的Bootloader程序代码，仅供参考：

#include "main.h"
#include "flash.h"

/* Bootloader entry point */
void bootloader(void) {
    /* Check if the user button is pressed */
    if (HAL_GPIO_ReadPin(USER_BUTTON_GPIO_Port, USER_BUTTON_Pin) == GPIO_PIN_RESET) {
        /* User button is pressed, enter bootloader mode */
        uint32_t bootloader_mode = 0x12345678;
        HAL_FLASH_Unlock();
        HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, BOOTLOADER_MODE_ADDRESS, bootloader_mode);
        HAL_FLASH_Lock();
        NVIC_SystemReset();
    } else {
        /* User button is not pressed, jump to application */
        uint32_t app_address = APP_ADDRESS;
        jump_to_app(app_address);
    }
}

/* Jump to application */
void jump_to_app(uint32_t app_address) {
    /* Deinitialize all peripherals */
    HAL_RCC_DeInit();
    HAL_DeInit();

    /* Set the vector table offset */
    SCB->VTOR = app_address;

    /* Jump to application */
    uint32_t jump_address = *(volatile uint32_t*)(app_address + 4);
    void (*jump)(void) = (void (*)())jump_address;
    jump();
}

/* Write flash */
bool write_flash(uint32_t address, uint8_t* data, uint32_t size) {
    HAL_FLASH_Unlock();

    /* Erase the flash page */
    FLASH_EraseInitTypeDef erase_init;
    erase_init.TypeErase = FLASH_TYPEERASE_PAGES;
    erase_init.PageAddress = address;
    erase_init.NbPages = 1;
    uint32_t page_error;
    HAL_FLASHEx_Erase(&erase_init, &page_error);

    /* Write the flash */
    for (uint32_t i = 0; i < size; i += 4) {
        uint32_t word_data = *(uint32_t*)(data + i);
        HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address + i, word_data);
    }

    HAL_FLASH_Lock();
    return true;
}

/* Read flash */
bool read_flash(uint32_t address, uint8_t* data, uint32_t size) {
    for (uint32_t i = 0; i < size; i++) {
        data[i] = *(uint8_t*)(address + i);
    }
    return true;
}

此代码用于实现一个简单的Bootloader，包括以下功能：

- 检测按键是否按下，如果按下则进入Bootloader模式；
- 如果按键没有按下，则跳转到应用程序；
- 写入Flash和读取Flash的函数，用于更新应用程序。

需要注意的是，此代码仅为参考代码，实际使用时需要根据硬件和应用程序的实际情况进行修改。