stm32 cubeide bootloader 简单流程笔记

灯琰1

已于 2024-08-22 16:30:42 修改

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文章标签： stm32 笔记嵌入式硬件

于 2024-08-22 16:25:24 首次发布

本文链接：https://blog.youkuaiyun.com/qq_38230916/article/details/141431192

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一 bootloader 区

1.通过cubumx配置一个串口，一个led，来验证现象

2.新建一个boot_boot的工程， STM32F103C8TX_FLASH.ld文件修改

FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 20K /* 0x5000 */ 留20k用来做bootloader区

3.添加app 地址定义

#define SYSTEM_APP_FLASH_ADDR    0x8005000

4.写跳转app 函数

 
typedef  void (*iap_fun)(void);
iap_fun jumpfun;
 
void jump_app()
{
 
	     jumpfun = *(__IO uint32_t*)(SYSTEM_APP_FLASH_ADDR + 4);//用户代码区第二个字为程序开始地址
 
	    __set_MSP(*(__IO uint32_t*) SYSTEM_APP_FLASH_ADDR);//初始化APP堆栈指针
 
	     jumpfun();//跳转到APP.
 
}

5.最后调用jump_app（），下载进芯片。

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

#define SYSTEM_APP_FLASH_ADDR    0x8005000


/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

//串口重定向代码放在main.c中
#ifdef __GNUC__                                 //串口重定向
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int c

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