STM32F407 cubeIDE Bootloader APP 如何写

一、bootloader

代码如下：

#define FLASH_JUMP_ADDR		(0x0800c000)
/* 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 *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif
PUTCHAR_PROTOTYPE
{HAL_UART_Transmit(&huart1 , (uint8_t *)&ch, 1, 0xFFFF);return ch;
}typedef void (*p_APP)(void);/** 功能：运行应用程程序* 输入：app_address：应用程序起始地址* 输出：* 备注：*/
void StartApplication(uint32_t app_address)
{p_APP application;uint32_t jump_address;
//判断栈顶指针的合法性if (((*(__IO uint32_t*)app_address) & 0x2F000000 ) == 0x20000000){jump_address = *(__IO uint32_t*) (app_address + 4);application = (p_APP) jump_address;__set_MSP(*(__IO uint32_t*) app_address);application();}else{printf("app_address illegal\r\n");}
}
/* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();MX_TIM2_Init();/* USER CODE BEGIN 2 */
//  HAL_Delay(1000);for(int i=0; i<10; i++){printf("---delay----\r\n");HAL_Delay(400);HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);}//怎加一个区域添加标志位，比较好。1代表用APP1,2代表app2，其他代表无APPif(((FLASH_JUMP_ADDR+4)&0xFF000000)==0x08000000) //Judge if start at 0X08XXXXXX.{printf("---jump--\r\n");StartApplication(FLASH_JUMP_ADDR); // Jump to  APP}elseprintf("---no jump--\r\n");/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){printf("---bootloader--\r\n");HAL_Delay(400);HAL_GPIO_TogglePin(LED0_GPIO_Port, LED0_Pin);/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}

程序的STM32F407ZETX_FLASH.ld需要修改以下，主要是flash的长度

/* Memories definition */
MEMORY
{CCMRAM    (xrw)    : ORIGIN = 0x10000000,   LENGTH = 64KRAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = 128KFLASH    (rx)    : ORIGIN = 0x8000000,   LENGTH = 48K
}

因为STM32F407的FLASH分区如下，所以取48K放bootloader，按照实际取大小即可。
在这里插入图片描述
栈顶指针通过WINHEX查看BIN文件是0X20020000如下：

二、写APP

代码如下：

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */#define SYSTEM_APP_FLASH_ADDR    0x800C000
/* 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 *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif
PUTCHAR_PROTOTYPE
{HAL_UART_Transmit(&huart1 , (uint8_t *)&ch, 1, 0xFFFF);return ch;
}
/* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 */SCB->VTOR=SYSTEM_APP_FLASH_ADDR;/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 *//* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */printf("---APP1--\r\n");HAL_Delay(500);HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);}/* USER CODE END 3 */
}

同时需要修改STM32F407ZETX_FLASH.ld文件

MEMORY
{CCMRAM    (xrw)    : ORIGIN = 0x10000000,   LENGTH = 64KRAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = 128KFLASH    (rx)    : ORIGIN = 0x800C000,   LENGTH = 80K
}