嵌入式系统——GPIO实验

#include "stm32f10x.h"
#include "delay.h"
//#include "sys.h"
#include "stm32f10x_exti.h"

//QHKJ TEB-CM5000实验箱STM32实验1
//固件库V3.5工程模板
//QHKJ

GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
  
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{ 
  /* Configure the system clocks */
//  RCC_Configuration();
//  SysTick_Configuration();
  delay_init();
    
  /* NVIC Configuration */
  NVIC_Configuration();

  /* Configure the GPIO ports */
  GPIO_Configuration();
  
  /* Connect EXTI Line9 to PA.9 */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource9);

  /* Configure EXTI Line8 to generate an interrupt on falling edge */  
  EXTI_InitStructure.EXTI_Line = EXTI_Line9;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

   for(;;)
   {                               /* 10£¬ 9£¬8£¬7£¬6£¬5£¬4£¬3£¬2£¬1£¬0
                                 00000 0   0  0  1  1  0  0  0  0  0  0
                                             1        1
                                          1              1
                                      1                     1*/
  GPIO_Write(GPIOF,  0xf87f);   //1111  1 000 0111 1 111   fc0f     1111  1 000010 0 0 111
  delay_ms(500);
     
  GPIO_Write(GPIOF, 0xf8ff);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  GPIO_Write(GPIOF, 0xfd07);    //1111  1 001 0010 0 111    f927
  delay_ms(500);  
  GPIO_Write(GPIOF, 0xf81f);    //1111  1 000 1100 0 111    f8c7
  delay_ms(500);
  GPIO_Write(GPIOF, 0xf987);    //1111  1 000 1100 0 111    f8c7
  delay_ms(500);
  GPIO_Write(GPIOF, 0xf867);    //1111  1 001 0010 0 111    f927
  delay_ms(500);
  GPIO_Write(GPIOF, 0xfc0f);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  GPIO_Write(GPIOF, 0xfa17);    //1111  1 100 0000 1 111   fc0f

  delay_ms(500);
  GPIO_Write(GPIOF, 0xf927);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  GPIO_Write(GPIOF, 0xf8c7);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  GPIO_Write(GPIOF, 0xfa17);    //1111  1 100 0000 1 111   fc0f

  delay_ms(500);
  GPIO_Write(GPIOF, 0xf927);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  GPIO_Write(GPIOF, 0xf8c7);    //1111  1 010 0001 0 111    fa17
  delay_ms(500);
  }   

}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
 NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  
  /* Enable the EXTI9_5 Interrupt */
  //NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}


/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable GPIOA, GPIOF and AFIO clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOF | 
                         RCC_APB2Periph_AFIO, ENABLE);
 
  /* Configure PF. as Output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOF, &GPIO_InitStructure);
    
  /* Configure PA9 as input floating (EXTI Line9) */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
//  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;  
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}