exti.c

STM32 开发板例子:外部中断. 开发环境:Keil For ARM

/*

                         \\\|///
                       \\  - -  //
                        (  @ @  )
+---------------------oOOo-(_)-oOOo-------------------------+
|                 智林STM32开发板试验程序                   |
|                     外部中断实验实验                      |
|                 刘笑然 by Xiaoran Liu                     |
|                        2008.4.16                          |
|                                                           |
|           智林测控技术研究所 ZERO research group          |
|                      www.the0.net                         |
|                             Oooo                          |
+-----------------------oooO--(   )-------------------------+
                       (   )   ) /
                        \ (   (_/
                         \_)     

*/
/*----------------------------------------------------------*\
 |  引入相关芯片的头文件                                    |
\*----------------------------------------------------------*/
#include <stdio.h>
#include <stm32f10x_lib.h>    // STM32F10x Library Definitions
#include "STM32_Init.h"       // STM32 Initialization
#include "TFT018.h"

int ledLight = 0;
int Alarm = 0;
/*----------------------------------------------------------*\
 | HARDWARE DEFINE                                          |
\*----------------------------------------------------------*/
#define LED             ( 1 << 5 )                // PB5: LED D2
/*----------------------------------------------------------*\
 | EXTI0 Interrupt Handler                                  |
\*----------------------------------------------------------*/
void EXTI0_IRQHandler(void)
{
  if (EXTI->PR & (1<<0)) {                        // EXTI13 interrupt pending?
    if ((ledLight ^=1) == 0) 
    	GPIOB->ODR &= ~LED;                           // switch on LED
    else
    	GPIOB->ODR |=  LED;                           // switch off LED

    EXTI->PR |= (1<<0);                           // clear pending interrupt
  }
}

/*----------------------------------------------------------*\
 | EXTI15..10 Interrupt Handler                             |
\*----------------------------------------------------------*/
void EXTI15_10_IRQHandler(void)
{
  if (EXTI->PR & (1<<13)) {                       // EXTI0 interrupt pending?
    if ((ledLight ^=1) == 0) 
    	GPIOB->ODR &= ~LED;                           // switch on LED
    else
    	GPIOB->ODR |=  LED;                           // switch off LED

    EXTI->PR |= (1<<13);                          // clear pending interrupt
  }
}
/*----------------------------------------------------------*\
 | MIAN ENTRY                                               |
\*----------------------------------------------------------*/
int main (void) {
  stm32_Init ();                                // STM32 setup
  LCD_Init();
  LCD_Clear_Screen(Blue);

  Font = 0;
  LCD_PutString(30,0,"STM32F 开发板",Cyan,Blue);
  LCD_PutString(35,16,"外部中断实验",Red,Yellow);
  Font = 1;
  LCD_PutString(38,32,"Version 1.0",Green,Blue);
  Font = 0;
  LCD_PutString(10,94,"智林测控技术研究所",Yellow,Blue);
  LCD_PutString(36,111,"www.the0.net",Magenta,Blue);

  for(;;) {
  	}
  }
/*----------------------------------------------------------*\
 | END OF FILE                                              |
\*----------------------------------------------------------*/