stm8 tim1 如何實(shí)現(xiàn)定時(shí) 不明白都不行

ID:7209 · 發(fā)表于 2016-10-14 14:13

/* MAIN.C file
*
* Copyright (c) 2002-2016 STMicroelectronics
*/

/***
曾經(jīng)給TIM1  捏了無(wú)數(shù)次，希望能幫到后來(lái)的兄弟免遭揉捏之苦，我將持續(xù)分析TIM1 的東西發(fā)上來(lái)給大家共同學(xué)習(xí)，保障每次一看就明白。

*/
#include "stm8s105c4.h"
void gpio_init(void);
void tim1_init(void);
void delay(unsigned int time);

void gpio_init(void)
{
PB_ODR |=0X01;
PB_DDR |=0X01;
PB_CR1 |=0X01;
PB_CR2 |=0X01;
}

void tim1_init()
{
//設(shè)置預(yù)分頻系數(shù)
TIM1_PSCRH = 0;
TIM1_PSCRL = 19;
//默認(rèn)系統(tǒng)時(shí)鐘 2Mhz  2000.000/20 = 100khz
//周期 1/100.000 = 0.00001s
//開啟溢出中斷
TIM1_IER = 0X01;
//設(shè)置定時(shí)值
TIM1_ARRH = (unsigned char) (5000>>8);
TIM1_ARRL = (unsigned char )5000;
//設(shè)置定時(shí)器初值
TIM1_CNTRH = (unsigned char) (5000>>8);
TIM1_CNTRL = (unsigned char )5000;
//這產(chǎn)生1 HZ 的方波  高電平500ms  低電平500毫秒
/*
*  50000 從什么地方毛出來(lái)的是預(yù)裝載值
*  50000 =定時(shí)時(shí)間 / 周期
*  比如想產(chǎn)生10HZ 的方波
* 1/10HZ = 0.1s  就是50ms高電平 50ms低電平
*  0.05s/0.00001s = 5000
*  裝載值 = 5000
*  0.00001s 從哪里來(lái)的啊啊啊啊
*  系統(tǒng)默認(rèn)是內(nèi)部時(shí)鐘 2mhz 2000.000/(19+1) = 100KHZ
*  1/100KZH = 0.00001s
*

*/

}
void delay(unsigned int time)
{
while(time--);
}

void  main()
{

gpio_init();
tim1_init();
TIM1_CR1 |=0X01;
_asm("rim");
   while (1);
}

@far @interrupt void TIM1_OVF_IRQ(void)
{
TIM1_SR1 &= 0XFE;
PB_ODR ^=0X01;  //取反 PB0
}

記得修改中斷 11 ，否則還是不行的。

ID:7209 · 發(fā)表于 2016-10-14 14:14

還是把，中斷這部分發(fā)上來(lái)，否則，還真有人，實(shí)驗(yàn)不通過
/* 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 TIM1_OVF_IRQ(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, TIM1_OVF_IRQ}, /* 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 */
};

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stm8 tim1 如何實(shí)現(xiàn)定時(shí) 不明白都不行

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