STM8 定时器Time1使用

1、定时器概述
    STM8S提供三种类型的 TIM 定时器：高级控制型(TIM1)、通用型(TIM2/TIM3/TIM5)和基本型定
时器(TIM4/TIM6)。它们虽有不同功能但都基于共同的架构。此共同的架构使得采用各个定时器
来设计应用变得非常容易与方便(相同的寄存器映射，相同的基本功能)。

2、现在来介绍高级定时器1的配置和应用。
代码如下：
main.c

/* MAIN.C file
 *
 * Copyright (c) 2002-2005 STMicroelectronics
 */
#include "stm8s.h"
#include "stm8s003f3p.h"
#include "stm8s_conf.h"

void GPIOInit(void);
void Time1_Init(void);


void main(void)
{

    CLK_HSECmd(DISABLE); //关闭外部高速振荡器
    CLK_HSICmd(ENABLE);     //启用内部高速时钟
    CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //设置 内部 时钟16M 为主时钟(默认是8分配2MHz)
    GPIOInit();
    Time1_Init();
    while (1){

    }
}

void GPIOInit(void)
{
        GPIO_Init(GPIOC, GPIO_PIN_3, GPIO_MODE_OUT_PP_LOW_FAST);
        GPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_OUT_PP_LOW_FAST);

}

void Time1_Init(void)
{
    TIM1_DeInit();                                                                //恢复为默认值
    TIM1_TimeBaseInit(0x0000, TIM1_COUNTERMODE_UP, 0x3e80, 0x00); //不分频16MHz  计数值16000 1ms中断一次
    TIM1_GenerateEvent(TIM1_EVENTSOURCE_UPDATE);    //手册里有说明,不设置的话就不会产生中断
    TIM1_ITConfig(TIM1_IT_UPDATE, ENABLE);                //配置更新中断
    TIM1_Cmd(ENABLE);                                                            //使能定时器
    enableInterrupts();                                                        //开启总中断
}


@far @interrupt void Timer4_interrupt_handler_t(void) //1ms定时中断
{
        static unsigned int count = 0;
        static unsigned char falg = 0;

    TIM1_ClearITPendingBit(TIM1_IT_UPDATE); //TIM1_SR = 0，清除中断标志

        if(count<1000){

                GPIO_WriteHigh(GPIOC, GPIO_PIN_4);
                GPIO_WriteLow(GPIOC, GPIO_PIN_3);
        }
        else if(count>=1000)
        {

            GPIO_WriteHigh(GPIOC, GPIO_PIN_3);
            GPIO_WriteLow(GPIOC, GPIO_PIN_4);
        }

        if(count >=2000)count =0;
        count++;
}

然后还有一个很重要的地方，就是在stm8_interrupt_vector.c中注册中断服务函数。

stm8_interrupt_vector.c

/*    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 Timer4_interrupt_handler_t(void);
struct interrupt_vector const _vectab[] = {
    {0x82, (interrupt_handler_t)_stext}, /* reset */
    {0x82, NonHandledInterrupt}, /* trap */
    {0x82, NonHandledInterrupt}, /* TLI */
    {0x82, NonHandledInterrupt}, /* AWU */
    {0x82, NonHandledInterrupt}, /* CLK */
    {0x82, NonHandledInterrupt}, /* EXTI0 Port A */
    {0x82, NonHandledInterrupt}, /* EXTI1 Port B */
    {0x82, NonHandledInterrupt}, /* EXTI2 Port C */
    {0x82, NonHandledInterrupt}, /* EXTI3 Port D */
    {0x82, NonHandledInterrupt}, /* EXTI4 Port E */
    {0x82, NonHandledInterrupt}, /* CAN RX */
    {0x82, NonHandledInterrupt}, /* CAN TX */
    {0x82, NonHandledInterrupt}, /* SPI (End of transfer) */
    {0x82, (interrupt_handler_t)Timer4_interrupt_handler_t}, /* TIM1 update/ overflow/ underflow/trigger/ break */
    {0x82, NonHandledInterrupt}, /* TIM1 capture/ compare */
    {0x82, NonHandledInterrupt}, /* TIM2 update/ overflow */
    {0x82, NonHandledInterrupt}, /* TIM2 capture/ compare */
    {0x82, NonHandledInterrupt}, /* TIM3 update/ overflow */
    {0x82, NonHandledInterrupt}, /* TIM3 capture/ compare */
    {0x82, NonHandledInterrupt}, /* UART1 Tx complete */
    {0x82, NonHandledInterrupt}, /* UART1 Receive register DATA FULL */
    {0x82, NonHandledInterrupt}, /* I2C interrupt */
    {0x82, NonHandledInterrupt}, /* UART2/3 Tx complete */
    {0x82, NonHandledInterrupt}, /* UART2/3 Receive register DATA FULL */
    {0x82, NonHandledInterrupt}, /* ADC1 end of conversion/ analog watchdog interrupt */
    {0x82, NonHandledInterrupt}, /* TIM4 update/ overflow */
    {0x82, NonHandledInterrupt}, /* Flash EOP/WR_PG_DIS */
    {0x82, NonHandledInterrupt}, /* irq25 */
    {0x82, NonHandledInterrupt}, /* irq26 */
    {0x82, NonHandledInterrupt}, /* irq27 */
    {0x82, NonHandledInterrupt}, /* irq28 */
    {0x82, NonHandledInterrupt}, /* irq29 */
};

通过上述的简单设置就可以使用高级定时器1了。

现象是一个LED以1s的间隔在亮灭间转换。