/**

 *  文件名：timer.h

 */

#ifndef _TIMER_H

#define _TIMER_H

#define SYS_MCLK 11059200 //系统主时钟

#define FOSC 11059200 //晶振频率

#define USING_T0

#define USING_STC15_T2

#ifdef USING_T0

extern uint8_t tmr0LowByte, tmr0HighByte;

void tmr0_init(uint8_t ms);

#endif

#ifdef USING_T1

extern uint8_t tmr1LowByte, tmr1HighByte;

void tmr1_init(uint8_t ms);

#endif

#ifdef USING_T2

void tmr2_init(uint8_t ms);

#endif

#ifdef USING_STC15_T2

void stc15_tmr2_init(uint8_t ms);

#endif

#endif

/**

 *  文件名：timer.c

 */

#include

#include "stdint.h"

#include "timer.h"

/**

 * 定时器0

 */

#ifdef USING_T0

uint8_t tmr0LowByte, tmr0HighByte;

void tmr0_init(uint8_t ms) { //!!8bits

uint32_t tmp; //小心溢出

tmp = ms * SYS_MCLK / 12 / 1000;

tmp = 65536 - tmp;

tmr0LowByte = (uint8_t)tmp;

tmr0HighByte = (uint8_t)(tmp >> 8);

AUXR &= 0x7F; //定时器时钟12T模式

TMOD &= 0xF0;

TMOD |= 0x01;

TL0 = tmr0LowByte;

TH0 = tmr0HighByte;

EA = 1;

ET0 = 1;

TR0 = 1;

}

#endif

#ifdef USING_T1

uint8_t tmr1LowByte, tmr1HighByte;

void tmr1_init(uint8_t ms) { //!!8bits

uint32_t tmp;

tmp = ms * SYS_MCLK / 12 / 1000;

tmp = 65536 - tmp;

tmr1LowByte = (uint8_t)tmp;

tmr1HighByte = (uint8_t)(tmp >> 8);

AUXR &= 0xBF;

TMOD &= 0x0F;

TMOD |= 0x10;

TL1 = tmr1LowByte;

TH1 = tmr1HighByte;

EA = 1;

ET1 = 1;

TR1 = 1;

}

#endif

#ifdef USING_T2

/**

 * 89系列单片机定时器2初始化

 * 定时器模式：16位自动重载

 * 定时器时钟：12T(FOSC/12)

 */

void tmr2_init(uint8_t ms) {

uint32_t tmp; //小心溢出

tmp = ms * SYS_MCLK / 12 / 1000;

tmp = 65536 - tmp;

T2MOD = 0x00; //初始化模式寄存器

T2CON = 0x00; //初始化控制寄存器

TL2 = (uint8_t)tmp; //设置定时器初值

TH2 = (uint8_t)(tmp >> 8);

RCAP2L = TL2; //设置定时器重载值

RCAP2H = TH2;

EA = 1; //!!!

ET2 = 1; //!!!

TR2 = 1;

}

#endif

#ifdef USING_STC15_T2

/**

 * stc15系列单片机定时器2初始化

 * 定时器模式：16位自动重载

 * 定时器时钟：12T(FOSC/12)

 */

void stc15_tmr2_init(uint8_t ms) {

uint32_t tmp; //小心溢出

tmp = ms * SYS_MCLK / 12 / 1000;

tmp = 65536 - tmp;

AUXR &= 0xFB; //定时器时钟12T模式

T2L = (uint8_t)tmp; //设置定时器初值

T2H = (uint8_t)(tmp >> 8);

EA = 1; //!!!

IE2 |= 0x04; //!!!开定时器2中断

AUXR |= 0x10; //定时器2开始计时

}

#endif