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APP
if(((FLASH_JUMP_ADDR+4)&0xFF000000)==0x08000000) //Judge if start at 0X08XXXXXX.
{
printf("---jump--\r\n");
StartApplication(FLASH_JUMP_ADDR); // Jump to APP
}
else
printf("---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 = 64K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K
FLASH (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。
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 = 64K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K
FLASH (rx) : ORIGIN = 0x800C000, LENGTH = 80K
}
只给APP分了80K, 后续可以分配给APP2。
运行效果如下：
这只是简单实现2个程序的跳转。如何升级还需标志位判断和跳转。