main.c

STM32GPIO例程,学习STM32的入门例程

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 3/12/2008
* Description        : This program show  how to use the GPIO of
                       of the board.when you put the button on the
                       board ,you will find one of the led will be
                       toggled .

********************************************************************************
* History:
* 3/12/2008: 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 "stm32f10x_lib.h"

/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
/* Private functions ---------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;
/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{

  int i=0;
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
  RCC_Configuration();

  /* GPIO configuration*/
  GPIO_Configuration();
  /*Turn off all the leds at first*/
  GPIO_WriteBit(GPIOB, GPIO_Pin_1, Bit_RESET);
  GPIO_WriteBit(GPIOB, GPIO_Pin_2, Bit_RESET);
  GPIO_WriteBit(GPIOB, GPIO_Pin_11, Bit_RESET);
  GPIO_WriteBit(GPIOB, GPIO_Pin_10, Bit_RESET);

  /*When a button is put,the corresponding led flashes */
  while(1)
  {
  if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_6))        //S2
   {
    GPIO_WriteBit(GPIOB, GPIO_Pin_11, (BitAction)0x01);
    for(i=0;i<100000;i++);
    GPIO_WriteBit(GPIOB, GPIO_Pin_11, (BitAction)0x00);

   }
   if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_4))       //S3
   {
    GPIO_WriteBit(GPIOB, GPIO_Pin_10, (BitAction)0x01);
    for(i=0;i<100000;i++);
    GPIO_WriteBit(GPIOB, GPIO_Pin_10, (BitAction)0x00);
   }
   if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_5))       //S4
   {
    GPIO_WriteBit(GPIOB, GPIO_Pin_2, (BitAction)0x01);
    for(i=0;i<100000;i++);
    GPIO_WriteBit(GPIOB, GPIO_Pin_2, (BitAction)0x00);
   }
   if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_3))      //S5
   {

    GPIO_WriteBit(GPIOB, GPIO_Pin_1, (BitAction)0x01);
    for(i=0;i<100000;i++);
    GPIO_WriteBit(GPIOB, GPIO_Pin_1, (BitAction)0x00);
   }
  }
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures Leds and Keys.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
   /*Configure PB11 as output for LD3*/
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*Configure PB10 as output for LD4*/
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*Configure PB1 as output for LD6*/
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_1;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*Configure PB2 as output for LD5*/
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*Configure PA3 as output for S5*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;		
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /*Configure PA4 as output for S3*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;		
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /*Configure PA5 as output for S4*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;		
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /*Configure PA6 as output for S2*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;			
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}



/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* 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)
  {
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);

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

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

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* 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)
    {
    }
  }
  /*Enble GPIOA、GPIOB、GPIOC*/
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
                         RCC_APB2Periph_GPIOC , ENABLE);
}


#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) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/