main.c

通过手动烧写flash,实现了stm32的自动更新功能,用户可以再本例程的基础上修改实现通过串口或者网络实现程序的自动更新

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V2.0.2
* Date               : 09/22/2008
* Description        : Main program body
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x_lib.h"
#include "main.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/



/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);


/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
extern void CallApplication(void);
int main(void)
{
	unsigned long bUpdate;
	unsigned long i, j;
	unsigned long pRd = BACKUP_START_ADDRESS;	//	
	unsigned long pWr = APP_START_ADDRESS;	//	
	/* Flash unlock */
	
	//RCC_Configuration();
  	//检查是否需要更新
	bUpdate = *(unsigned long*)CONFIG_START_ADDRESS;	
	if (bUpdate != 0xFFFFFFFF)	//需要更新
	{
		//更新程序,将BACKUP_START_ADDRESS拷贝到APP_START_ADDRESS, 一次拷贝1K
		FLASH_Unlock();
		for (i = 2; i < 32; i++)
		{
			FLASH_ErasePage(pWr);	//擦除1k

			//写入1k
			for (j = 0; j < 256; j++, pWr+=4, pRd+=4)
			{
				FLASH_ProgramWord(pWr, *(unsigned long*)pRd); //写入4个byte的数据
			}
			FEED_DOG;
		}
		FLASH_ErasePage(CONFIG_START_ADDRESS); //清除标志位
		FLASH_Lock();
	}

	NVIC_SetVectorTable(APP_START_ADDRESS, 0);	//重新设置向量表
	CallApplication();

}


/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
 	ErrorStatus HSEStartUpStatus;
	/* RCC system reset(for debug purpose) */
	RCC_DeInit();
	
	/* Enable HSE */
	RCC_HSEConfig(RCC_HSE_ON);
	
	/* Wait till HSE is ready */
	HSEStartUpStatus = RCC_WaitForHSEStartUp();
	
	if (HSEStartUpStatus == SUCCESS)
	{
		/* Enable Prefetch Buffer */
		FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
		
		/* Flash 2 wait state */
		FLASH_SetLatency(FLASH_Latency_2);
		
		/* HCLK = SYSCLK */
		RCC_HCLKConfig(RCC_SYSCLK_Div2);
		
		/* PCLK2 = HCLK */
		RCC_PCLK2Config(RCC_HCLK_Div2);
		
		/* PCLK1 = HCLK/2 */
		RCC_PCLK1Config(RCC_HCLK_Div2);
		
		/* PLLCLK = 8MHz * 9 = 72 MHz */
		RCC_PLLConfig(RCC_PLLSource_HSE_Div2, RCC_PLLMul_4);
		
		/* Enable PLL */
		RCC_PLLCmd(ENABLE);
		
		/* Wait till PLL is ready */
		while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
		{}
		
		/* Select PLL as system clock source */
		RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
		
		/* Wait till PLL is used as system clock source */
		while (RCC_GetSYSCLKSource() != 0x08)
		{}
	}

}



/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/