實驗4-5 EXTI：中斷與事件

ID:415128 · 發(fā)表于 2018-11-18 14:00

本帖最后由 zhou__mi 于 2020-6-22 19:06 編輯

程序代碼：
//Pass at PROTEUS 8.7,ZhouMi,1881003@qq.com,20181118,11:52
//實驗內(nèi)容和現(xiàn)象：
//（1）配置完整RCC,使能GPIOC、GPIOE和AFIO的時鐘的時鐘；
//（2）配置NVIC：優(yōu)先組NVIC_PriorityGroup_1為1，占先式PreemptionPriority為0，副優(yōu)先SubPriority為0；
//（3）設(shè)置端口位PA5（聯(lián)接KEY1）為GPIO_Mode_IN_FLOATING、PC6（聯(lián)接LED1）為GPIO_Mode_Out_PP 50MHz；
//（4）LCD顯示實驗信息，沒有學習LCD之前，請忽略；
//（5）配置EXTI：與PA5聯(lián)接的KEY1中斷為EXTI_Line5。
//（6）在stm32f10x_it.c里，配置EXTI9_5_IRQHandler，發(fā)生中斷時將PC6輸出取反驅(qū)動LED1指示中斷發(fā)生了。
//（7）下載運行程序，按下KEY1觸發(fā)中斷EXTI_Line5，LED1指示中斷發(fā)生了。
// 說明：程序源于STM3210E-EVAL，請看本project的readme.txt
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name       : main.c
* Author          : MCD Application Team
* Version          : V2.0.1
* Date             : 06/13/2008
* 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"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static vu32 TimingDelay = 0;
EXTI_InitTypeDef EXTI_InitStructure;
ErrorStatus HSEStartUpStatus;

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

void SysTick_Config(void);
void Delay(u32 nCount);
void Decrement_TimingDelay(void);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : main
* Description : Main program.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
  RCC_Configuration();       //（1）調(diào)用RCC設(shè)置函數(shù)

  /* NVIC configuration */
  NVIC_Configuration();       //（2）調(diào)用NVIC設(shè)置函數(shù)

  /* Configure the GPIO ports */
  GPIO_Configuration();       //（3）調(diào)用GPIO設(shè)置函數(shù)

  /* Connect KEY1 Button EXTI Line to Key Button GPIO Pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource5);       //（4）PA5設(shè)置為EXTI5

  /* Configure KEY1 Button EXTI Line to generate an interrupt on falling edge */
  EXTI_InitStructure.EXTI_Line = EXTI_Line5;       //EXTI中斷線是EXTI_Line5
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;       //EXTI中斷模式是中斷(另外一種是事件)
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;       //EXTI觸發(fā)方式是下降沿
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;             //使用EXTI
  EXTI_Init(&EXTI_InitStructure);       //（5）初始化EXTI

  /* Generate software interrupt: simulate a falling edge applied on KEY1 Button EXTI line */
  EXTI_GenerateSWInterrupt(EXTI_Line5); //產(chǎn)生一個軟件中斷

  while (1)             //等待中斷發(fā)生
  {
  }
}

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

工程見附件

ID:407876 · 發(fā)表于 2018-11-19 09:25

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