STM32F4在UCOS下开中断

ID:82083 · 发表于 2015-6-9 02:25

不说了，贴代码TALK IS LESS.SHOW ME THE CODE.

这个是。c文件

#include "includes.h"
#include "stm32f4xx_exti.h"
void EXTILine4_Config(void)
{

  GPIO_InitTypeDef  GPIO_InitStructure;
  NVIC_InitTypeDef  NVIC_InitStructure;
  EXTI_InitTypeDef  EXTI_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);


  GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd =GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_4;
  GPIO_Init(GPIOD,&GPIO_InitStructure);

  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD,EXTI_PinSource4);

  EXTI_InitStructure.EXTI_Line =EXTI_Line4;
  EXTI_InitStructure.EXTI_Mode =EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger =EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd =ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  NVIC_InitStructure.NVIC_IRQChannel =EXTI4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
  NVIC_InitStructure.NVIC_IRQChannelCmd =ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void EXTI4_IRQHandler()
{ long long int  i;
// OS_CPU_SR cpu_sr;

// OS_ENTER_CRITICAL(); //????????,????
// //?????????(0~255)
// OSIntEnter ( );    //OSSemPost(NMEA_MBOX);
// OS_EXIT_CRITICAL();  //????????
//

if(EXTI_GetITStatus(EXTI_Line4) !=RESET)
{
      BUZZER(HIGH);
delay_ms(1000);
         BUZZER(LOW);

}
EXTI_ClearFlag(EXTI_Line4);
// OSIntExit ( );

}

接下来是。h

#ifndef _EXIT_H_
#define _EXIT_H_
void EXTILine4_Config(void);
void Buzzer(uint8_t time, uint8_t OnTime, uint8_tOffTime);

#endif

------------------------------------------------------------------------------

需要注意的是注意配置的引脚有没有错误，在ucos下要把那两句注释了的OS开头的语句加上，用来告诉系统中断的开闭，让系统进行任务调度，具体参考  可剥夺式内核的任务调度策略

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