例5.txt

新手必备的stm8例程

第五个是TLI中断程序，PD7接旋转编码开关1脚，2脚接地，3脚接PC5，通过TLI的下降沿触发中断，判断PC5 是高电平或者低电平来判断编码开关是正转还是反转，从而控制三颗LED的流水方向。
#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)
{
    /* LED IO Configuration        */
    /* LD3: PD3             */
    /* LD2: PD1             */
    /* LD1: PD0             */
    PD_DDR |= 0x0D;          /* Output. */
    PD_CR1 |= 0x0D;          /* PushPull. */
    PD_CR2 |= 0x0D;          /* Output speed up to 2MHz. */
                
                 /*Switch IO Configuration*/
                /*PC5 contect to the key*/
                PC_DDR        &=~0x20;        /*Input*/
                PC_CR1        |=0x20;        /*Float In*/
                PC_CR2        &=~0x20;      /*Disable Exti Interrupt*/

    /* PD7 external interrupt */
    EXTI_CR1  = 0x80;         /* External interrupt (TLI) sensitivity. */
    EXTI_CR2  = 0x00;
    PD_DDR   &=~0x80;        /* PD7: Input */
    PD_CR2   |= 0x80;        /* Enable TLI interrupt. */
    _asm("rim");             //这是开中断 
}

main()
{
GPIO_Init();
while (1)
{
                PD_ODR=table[i];                        //往IO口写数据
}
}
@far @interrupt void TLI_Interrupt (void)
{
    if(PC_IDR&=0x20)i++;
                else        i--;
                if(i>3)i=3;
                if(i<2)i=1;
    return;
}

/*        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 TLI_Interrupt (void);
struct interrupt_vector const _vectab[] = {
        {0x82, (interrupt_handler_t)_stext}, /* reset */
        {0x82, NonHandledInterrupt}, /* trap  */
        {0x82, TLI_Interrupt},       /* 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, NonHandledInterrupt}, /* irq23 */
        {0x82, NonHandledInterrupt}, /* irq24 */
        {0x82, NonHandledInterrupt}, /* irq25 */
        {0x82, NonHandledInterrupt}, /* irq26 */
        {0x82, NonHandledInterrupt}, /* irq27 */
        {0x82, NonHandledInterrupt}, /* irq28 */
        {0x82, NonHandledInterrupt}, /* irq29 */
};