本程序通过外部中断来控制LED亮灭。在STVD建立工程后，包含了main.c和stm8_interrupt_vector.c，外部中断程序除了要在main里面初始化以外还需要对stm8_interrupt_vector.c作一下改动。main程序如下：

/* MAIN.C file
 *
 * Copyright (c) 2002-2005 STMicroelectronics
 */
#include <iostm8s.h>

void Delay(unsigned int time)
{
 volatile unsigned int i;
 while(time--){
  i=300;
  while(i--);
 }
}

void Init_Gpio(void)
{
 PC_ODR |= (1<<1);//PC1输出1
 PC_DDR |= (1<<1)|(1<<2);//将PC1和PC2设置为输出
}

void Init_Exti(void)
{
 PD_DDR &= (1<<3);//PD3设置为输入
 PD_CR1 |= (1<<3);//带上拉电阻输入
 PD_CR2 |= (1<<3);//使能外部中断
 EXTI_CR1 |= (2<<6);//仅下降沿触发
 _asm("rim\n"); //使能全局中断
}

main()
{
 Init_Gpio();
 Init_Exti();
 while (1)
 {
  Delay(200);
 }
}

stm8_interrupt_vector.c如下，有颜色的字为修改过的内容

/* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
 * Copyright (c) 2007 STMicroelectronics
 */
#include <iostm8s.h>

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;
}

@far @interrupt void EXTI_PORTD_IRQHandler (void)
{
  /* In order to detect unexpected events during development,
     it is recommended to set a breakpoint on the following instruction.
  */
 PC_ODR ^= (1<<1)|(1<<2);
  return;
}

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, EXTI_PORTD_IRQHandler}, /* 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 */
};