stvd+stm8l051F3(2): 外部中断

stvd+stm8l051F3(一): 外部中断

stvd: ST Visual Develop Version 4.3.9
ic:     stm8l051F3

1、原理图


按键接在stm8l051F3的PB1脚，LED接在stm8l051F3的PD0脚

2、建立stvd key项目
打开stvd新建stm8l051_key项目，并将stm8l15x.h，stm8l15x_it.h，stm8l15x_it.c，stm8l15x_conf.h，stm8l15x_exti.c，stm8l15x_gpio.c文件加入项目；
stm8l15x_gpio.c：io相关源文件；
stm8l15x_exti.c：中断相关源文件；


3、修改代码
main.c：

/* MAIN.C file
 *
 * Copyright (c) 2002-2005 STMicroelectronics
 */
#include "stm8l15x.h"

//定义LED、按键端口
#define LED_PORT  GPIOD
#define LED_PINS  GPIO_Pin_0
#define KEY_PORT  GPIOB
#define KEY_PINS  GPIO_Pin_1
/*******************************************************************************
****入口参数：无
****出口参数：无
****函数备注：不精确延时函数
*******************************************************************************/
void Delay(__IO uint16_t nCount)
{
    /* Decrement nCount value */
    while (nCount != 0)
    {
        nCount--;
    }
}
/*******************************************************************************
****函数说明：主函数
****入口参数:无
****出口参数:无
****函数备注:按键按下后在外部中断1中将LED亮灭变换
********************************************************************************/
void main(void)
{
  GPIO_Init(LED_PORT,LED_PINS,GPIO_Mode_Out_PP_Low_Slow);//初始化LED端口
  GPIO_Init(KEY_PORT, KEY_PINS, GPIO_Mode_In_PU_IT);//初始化按键，上拉输入，带中断


  EXTI_DeInit (); //恢复中断的所有设置
  EXTI_SetPinSensitivity (EXTI_Pin_1,EXTI_Trigger_Falling);//外部中断1，下降沿触发，向量号9
  enableInterrupts();//使能中断

  while (1)//等待中断
  {

  }
}

stm8l15x.h:
打开芯片型号宏定义

/* Uncomment the line below according to the target STM8L15x device used in your
   application
  */
/* #define STM8L15X_LD */ /*!< STM8L15X_LD: STM8L15x Low density devices */
/* #define STM8L15X_MD */ /*!< STM8L15X_MD: STM8L15x Medium density devices */
/* #define STM8L15X_MDP */ /*!< STM8L15X_MDP: STM8L15x Medium density plus devices */
/* #define STM8L15X_HD */ /*!< STM8L15X_HD: STM8L15x/16x High density devices */
 #define STM8L05X_LD_VL */ /*!< STM8L05X_LD_VL: STM8L051xx3 Low density value line devices */
/* #define STM8L05X_MD_VL */ /*!< STM8L05X_MD_VL: STM8L052xx6 Medium density value line devices */
/* #define STM8L05X_HD_VL */ /*!< STM8L05X_HD_VL: STM8L052xx8 High density value line devices */
/* #define STM8AL31_L_MD */ /*!< STM8AL31_L_MD: STM8AL3x Medium density devices */

stm8l15x_conf.h：
关闭USE_FULL_ASSERT宏

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Uncomment the line below to expanse the "assert_param" macro in the
   Standard Peripheral Library drivers code */
/* #define USE_FULL_ASSERT (1) */

/* Exported macro ------------------------------------------------------------*/

stm8l15x_it.c：
修改中断向量9响应函数INTERRUPT_HANDLER(EXTI1_IRQHandler,9)，在该函数中添加自定义中断处理函数

INTERRUPT_HANDLER(EXTI1_IRQHandler,9)
{
    /* In order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction.
    */

    EXTI_ClearITPendingBit (EXTI_IT_Pin1);//清除中断标志
    GPIO_ToggleBits(GPIOD, GPIO_Pin_0);//翻转LED端口电平
}

stm8_interrupt_vector.c：
注释@far @interrupt void NonHandledInterrupt (void)函数，添加#include "stm8l15x_it.h"，解决重定义拨错问题，
将_vectab中irq9的中断处理函数由NonHandledInterrupt修改为EXTI1_IRQHandler

/*    BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
 *    Copyright (c) 2007 STMicroelectronics
 */

/* 添加stm8l15x_it.h头文件 */
#include "stm8l15x_it.h"

typedef void @far (*interrupt_handler_t)(void);

struct interrupt_vector {
    unsigned char interrupt_instruction;
    interrupt_handler_t interrupt_handler;
};

/* 注释掉NonHandledInterrupt */
#if 0
@far @interrupt void NonHandledInterrupt (void)
{
    /* in order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction
    */
    return;
}
#endif

extern void _stext(); /* startup routine */

struct interrupt_vector const _vectab[] = {
    {0x82, (interrupt_handler_t)_stext}, /* reset */
    {0x82, NonHandledInterrupt}, /* trap */
    {0x82, NonHandledInterrupt}, /* irq0 */
    {0x82, NonHandledInterrupt}, /* irq1 */
    {0x82, NonHandledInterrupt}, /* irq2 */
    {0x82, NonHandledInterrupt}, /* irq3 */
    {0x82, NonHandledInterrupt}, /* irq4 */
    {0x82, NonHandledInterrupt}, /* irq5 */
    {0x82, NonHandledInterrupt}, /* irq6 */
    {0x82, NonHandledInterrupt}, /* irq7 */
    {0x82, NonHandledInterrupt}, /* irq8 */
    {0x82, EXTI1_IRQHandler}, /* irq9 */
    {0x82, NonHandledInterrupt}, /* irq10 */
    {0x82, NonHandledInterrupt}, /* irq11 */
    {0x82, NonHandledInterrupt}, /* irq12 */
    {0x82, NonHandledInterrupt}, /* irq13 */
    {0x82, NonHandledInterrupt}, /* irq14 */
    {0x82, NonHandledInterrupt}, /* irq15 */
    {0x82, NonHandledInterrupt}, /* irq16 */
    {0x82, NonHandledInterrupt}, /* irq17 */
    {0x82, NonHandledInterrupt}, /* irq18 */
    {0x82, NonHandledInterrupt}, /* irq19 */
    {0x82, NonHandledInterrupt}, /* irq20 */
    {0x82, NonHandledInterrupt}, /* irq21 */
    {0x82, NonHandledInterrupt}, /* irq22 */
    {0x82, NonHandledInterrupt}, /* irq23 */
    {0x82, NonHandledInterrupt}, /* irq24 */
    {0x82, NonHandledInterrupt}, /* irq25 */
    {0x82, NonHandledInterrupt}, /* irq26 */
    {0x82, NonHandledInterrupt}, /* irq27 */
    {0x82, NonHandledInterrupt}, /* irq28 */
    {0x82, NonHandledInterrupt}, /* irq29 */
};

编译项目通过

4、测试
设置断点单步调试，按下按键led点亮，再按led熄灭。