STM8S903K3T6C基于ST Visual Develop开发外部中断示例

Posted 2022-12-06 perseverance52

STM8S903K3T6C基于ST Visual Develop开发外部中断示例

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• 📺工程配置过程演示：（不包含中断向量相关内容）
  

• 📌相关篇《STM8S903K3T6C基于ST Visual Develop开发输入输出按键检测示例》

📚外部中断

• 📑STM8 I/O 口引脚配置表

• 📖外部中断端口以及引脚
  
• 📜外部中断向量表
  

• ✅对应的是stm8_interrupt_vector.c文件中的代码：

struct interrupt_vector const _vectab[] = 
	0x82, (interrupt_handler_t)_stext, /* reset */
	0x82, NonHandledInterrupt, /* trap  */
	0x82, NonHandledInterrupt, /* irq0  TLI引脚中断-》PD7引脚*/
	0x82, NonHandledInterrupt, /* irq1  */
	0x82, NonHandledInterrupt, /* irq2  */
	0x82, NonHandledInterrupt, /* irq3  PA端口*/
	0x82, NonHandledInterrupt, /* irq4  PB端口*/
	0x82, PC_Out_Int, /* irq5  PC端口*/
	0x82, NonHandledInterrupt, /* irq6  PD端口*/
	0x82, NonHandledInterrupt, /* irq7  PE端口*/
	0x82, NonHandledInterrupt, /* irq8  */
	0x82, NonHandledInterrupt, /* 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 */
;

🌼按键中断示例代码

📝实现的功能;当PC1按键按下时，PD2引脚上的LED灯状态翻转，当PC5按键按下时，PD7引脚上的LED灯状态翻转。

#include"stm8s903k.h"
_Bool LED1  @PD_ODR:7;
_Bool LED2  @PD_ODR:2;

_Bool but1  @PC_IDR:1;
_Bool but2  @PC_IDR:5;

void GPIO_Init(void)

    PD_DDR |= 0xFF;//推挽输出
    PD_CR1 |= 0xFF;
		
		PC_DDR = 0x00;
    PC_CR1 |= 0xFF;//PC1和PC5中断上拉输入
    PC_CR2 |= 0xFF;
		

void main()

	_asm("sim");    //disable all interrupt
    GPIO_Init();
		EXTI_CR1 = 0x20;    //开启PC口，0x20下降沿触发
    _asm("rim");    //enable all interrupt
		LED1 = 0;
		LED2 = 0;
    while(1);

//@far @interrupt void TLI_Int(void)
//
//    LED1 = !LED1;
 //   while(1);
//
@far @interrupt void PC_Out_Int(void)

	if(but1 == 0)
    LED2 = !LED2;
	
   	if(but2 == 0)
		LED1 = !LED1;
	 

• 🌻stm8_interrupt_vector.c文件中的代码：

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

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

struct interrupt_vector 
	unsigned char interrupt_instruction;
	interrupt_handler_t interrupt_handler;
;

@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;


extern void _stext();     /* startup routine */
//@far @interrupt void TLI_Int(void);
extern @far @interrupt void PC_Out_Int(void);
//@far @interrupt void PC5_Out_Int(void);
struct interrupt_vector const _vectab[] = 
	0x82, (interrupt_handler_t)_stext, /* reset */
	0x82, NonHandledInterrupt, /* trap  */
	0x82, NonHandledInterrupt, /* irq0  TLI_Int*/
	0x82, NonHandledInterrupt, /* irq1  */
	0x82, NonHandledInterrupt, /* irq2  */
	0x82, NonHandledInterrupt, /* irq3  */
	0x82, NonHandledInterrupt, /* irq4  */
	0x82, PC_Out_Int, /* irq5  */
	0x82, NonHandledInterrupt, /* irq6  */
	0x82, NonHandledInterrupt, /* irq7  */
	0x82, NonHandledInterrupt, /* irq8  */
	0x82, NonHandledInterrupt, /* 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 */
;