2020年03月15日 | STVD TIM4 8位中断定时器

中断定时：

1.在main.c中写下中断函数

@far @interrupt void TIM4_UPD_OVF_IRQHandler(void)

{

  TIM4_SR=0x00;//清楚更新标志

  PD_ODR^=0x0f;

}

添加声明：void TIM4_UPD_OVF_IRQHandler(void);

出现错误“#error cpstm8 main.c:40(48) space attribute conflict“

将“@near @interrupt void TIM4_UPD_OVF_IRQHandler(void)”改为“@far@interrupt void TIM4_UPD_OVF_IRQHandler(void)”

2.在stm8_interrupt_vector.c文件中在“extern void _stext();”下面添加声明:extern void TIM4_UPD_OVF_IRQHandler(void);

更改中断向量表为： {0x82, (interrupt_handler_t)TIM4_UPD_OVF_IRQHandler}, /* irq23 */

在中断向量表中若不添加(interrupt_handler_t)，将会出现“#error cpstm8 stm8_interrupt_vector.c:48(8+23) invalid pointer initializer”的错误

3，中断函数既可以放在main.c中也可以放在stm8_interrupt_vector.c中。

/********************************************************************************************************************************************************

/* MAIN.C file

 * 

 * Copyright (c) 2002-2005 STMicroelectronics

 */

//中断方式的8位定时器

//周期是30.63ms

#include "stm8s103f.h"

main()

{

 //IO口的初始化

 PD_DDR=0x0f;

 PD_CR1=0x0f;

 PD_CR2=0x00;

 PD_ODR=0x00;//设置pd0、pd1、pd2、pd3的输出为0

 //定时器4的初始化

 TIM4_IER = 0x00; // 禁止中断

 TIM4_EGR = 0x01; // 允许产生更新事件

 TIM4_PSCR = 0x07; // 计数器时钟=主时钟/128=2MHZ/128

          // 相当于计数器周期为64us

 TIM4_ARR = 255; // 设定重装载时的寄存器值，255是最大值

 TIM4_CNTR = 255;// 设定计数器的初值

         // 定时周期=(ARR+1)*64=30.63mS

 TIM4_CR1 = 0x01;// b0 = 1,允许计数器工作

         // b1 = 0,允许更新

         // 设置控制器，启动定时器

 TIM4_IER = 0x01;// 允许更新中断

 _asm("rim"); // 允许CPU全局中断

 //进入无限循环

 while (1)

 {

 }

}

 /********************************************************************************************************************************************************

stm8_interrupt_vector.c

/* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices

 * Copyright (c) 2007 STMicroelectronics

 */

 #include "stm8s103f.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;

}

extern void _stext();     /* startup routine */

void TIM4_UPD_OVF_IRQHandler(void);

//函数功能：定时器4的中断服务程序

//输入参数：无

//输出参数：无

//返回值：无

@near @interrupt void TIM4_UPD_OVF_IRQHandler(void)

{

  TIM4_SR=0x00;//清楚更新标志

  PD_ODR^=0x0f;

}

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, (interrupt_handler_t)TIM4_UPD_OVF_IRQHandler}, /* irq23 */

 {0x82, NonHandledInterrupt}, /* irq24 */

 {0x82, NonHandledInterrupt}, /* irq25 */

 {0x82, NonHandledInterrupt}, /* irq26 */

 {0x82, NonHandledInterrupt}, /* irq27 */

 {0x82, NonHandledInterrupt}, /* irq28 */

 {0x82, NonHandledInterrupt}, /* irq29 */

};