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。