2021年10月08日 | STM8 定时器Time1使用

2021-10-08 来源：eefocus

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

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/* 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

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/* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
*/
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。

STM8 定时器 Time1

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