main.c

基于STM32 的IAP升级库

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 05/21/2007
* Description        : The main program
********************************************************************************
* History:
* 05/21/2007: V0.1 
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "common.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern pFunction Jump_To_Application;
extern u32 JumpAddress;

/* Private function prototypes -----------------------------------------------*/
static u8 Push_Button_Read (void);
static void Push_Button_Config(void);
static void IAP_Init(void);

/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif
  
  /* Flash unlock */
  FLASH_Unlock();
  
  Push_Button_Config();

  /* Test if PB.09 level is low (Key push-button on Eval Board pressed) */
  if (Push_Button_Read() == 0x00)       
  { /* If Key is pressed */
    /* Execute the IAP driver in order to re-program the Flash */
    IAP_Init();
    SerialPutString("\r\n======================================================================");
    SerialPutString("\r\n=              (C) Copyright 2007 STMicroelecronics                  =");
    SerialPutString("\r\n=                                                                    =");
    SerialPutString("\r\n=     In-Application Programming Application  (Version 0.1)          =");
    SerialPutString("\r\n=                                                                    =");
    SerialPutString("\r\n=                                   By MCD Application Team          =");
    SerialPutString("\r\n======================================================================");
    SerialPutString("\r\n\r\n");
    Main_Menu ();
  }
  /* Keep the user application running */
  else 
  {
    /* Test if user code is programmed starting from address "ApplicationAddress" */
    if (((*(vu32*)ApplicationAddress) & 0x2FFF0000 ) == 0x20000000)
    { /* Jump to user application */
      JumpAddress = *(vu32*) (ApplicationAddress + 4);
      Jump_To_Application = (pFunction) JumpAddress;
      Jump_To_Application();
	}
  }

  while (1)
  {
  }
}

/*******************************************************************************
* Function Name  : IAP_Init
* Description    : Initialize the IAP:Configure RCC, USART and GPIOs.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void IAP_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;

  /* Clock configuration -------------------------------------------------------*/
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();

  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  while(RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET)
  {
  }

  /* Flash 2 wait state and Prefetch enable*/
  FLASH_SetLatency(FLASH_Latency_2);  
  FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

  /* HCLK = SYSCLK */
  RCC_HCLKConfig(RCC_SYSCLK_Div1); 

  /* PCLK2 = HCLK */
  RCC_PCLK2Config(RCC_HCLK_Div1); 

  /* PCLK1 = HCLK/2 */
  RCC_PCLK1Config(RCC_HCLK_Div2);

  /* PLLCLK = 8MHz * 9 = 72 MHz */
  RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

  /* 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)
  {
  }

  /* Enable GPIOA, GPIOC and USART1 clock  */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC
                         | RCC_APB2Periph_USART1, ENABLE);

  /* Configure the GPIO ports( USART1 Transmit and Receive Lines) */
  /* Configure the USART1_Tx as Alternate function Push-Pull */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure the USART1_Rx as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /*-- USART1 configured as follow:------------------------
        - Word Length = 8 Bits
        - 1 Stop Bit
        - No parity
        - BaudRate = 115200 baud
        - Receive and transmit enabled
  -------------------------------------------------------*/

  USART_InitStructure.USART_BaudRate = 115200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No ;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  USART_InitStructure.USART_Clock = USART_Clock_Disable;
  USART_InitStructure.USART_CPOL = USART_CPOL_Low;
  USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
  USART_InitStructure.USART_LastBit = USART_LastBit_Disable;

  USART_Init(USART1, &USART_InitStructure);
  
  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
}

/*******************************************************************************
* Function Name  : Push_Button_Read
* Description    : Read the port pin (connected to the push button) level.
* Input          : None
* Output         : None
* Return         : The port pin level (SET or RESET).
*******************************************************************************/
static u8 Push_Button_Read (void)
{
  /* Return the status of the PB.9 pin = "Key" button on the STM32F10x-EVAL */
  return GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_9);
}

/*******************************************************************************
* Function Name  : Push_Button_Config
* Description    : Configures the port pin connected to the push button.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
static void Push_Button_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable GPIOB clock  */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure PB.09 as input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert error line source number
* Output         : None
* Return         : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  while(1)
  {
  }
}
#endif

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/