例3.txt

新手必备的stm8例程

第三个是定时器4的应用程序，这次是基于中断的方法的。实现功能跟上面软件查询的一样，简单的流水灯。
#include "STM8S105C_S.h"
#define uint unsigned int
#define uchar unsigned char
uchar table[]={0x00,0x01,0x04,0x08};
uchar i=0;

void GPIO_Init(void)
{
        PD_DDR|=0x0d;                                        //3个LED端口(PD3 PD2 PD0 )设为推挽输出，频率10M  方向，方式，频率
        PD_CR1|=0x0d;
        PD_CR2|=0x0d;
}
void Time4_Init(void)
{
        TIM4_IER=0x01;                                        //禁止触发中断,使能更新中断
        TIM4_EGR=0x01;                                        //计数器溢出时，更新事件产生
        TIM4_PSCR=0x07;                                //对计数脉冲进行128分频
        TIM4_ARR=255;                                        //计数值，当计数器计数到这个值就溢出
        TIM4_CR1=0x01;                                        //使能计数器
        _asm("rim");//这是开中断 
}

main()
{
GPIO_Init();
Time4_Init();
while (1)
{
                PD_ODR=table[i];                        //往IO口写数据
}
}
@far @interrupt void TIM4_UPD_OVF_IRQHanlder (void)
{
        TIM4_SR=0x00;
        i++;
        if(i==4)i=0;
}


/*        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 */
extern @far @interrupt void TIM4_UPD_OVF_IRQHanlder (void);
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, 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, TIM4_UPD_OVF_IRQHanlder}, /* irq23 */
        {0x82, NonHandledInterrupt}, /* irq24 */
        {0x82, NonHandledInterrupt}, /* irq25 */
        {0x82, NonHandledInterrupt}, /* irq26 */
        {0x82, NonHandledInterrupt}, /* irq27 */
        {0x82, NonHandledInterrupt}, /* irq28 */
        {0x82, NonHandledInterrupt}, /* irq29 */
};