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Delay.c文件:
#include "LPC11XX.h"
#include "gpio.h"
#include "timer16.h"
#include "Delay.h"
/*系统时钟配置为12MHz,因此提供给定时器的时钟为12Mhz,因此得出以下分频值和匹配值*/
void Delay_Us(unsigned int DelayTimes) /* setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); /* 开启定时器Timer16_1时钟--时钟配置中开启该时钟 */
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 12; /* set prescaler to zero 根据AHB时钟确定分频值 */
LPC_TMR16B1->MR0 = DelayTimes; /* 所需的延时时间 */
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts 复位所有的中断 */
LPC_TMR16B1->MCR = 0x04; /* stop timer on match --达到匹配停止 */
LPC_TMR16B1->TCR = 0x01; /* start timer 启动定时器 */
while (LPC_TMR16B1->TCR & 0x01); /* 等待直到时间到 */
LPC_TMR16B1->TCR = 0x00; /* Close timer --关闭定时器 */
}
void Delay_Ms(unsigned int DelayTimes) /* setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); /* 开启定时器Timer16_1时钟 */
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 12000; /* set prescaler to zero */
LPC_TMR16B1->MR0 = DelayTimes;
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts */
LPC_TMR16B1->MCR = 0x04; /* stop timer on match */
LPC_TMR16B1->TCR = 0x01; /* start timer */
while (LPC_TMR16B1->TCR & 0x01); /* 等待直到时间到 */
LPC_TMR16B1->TCR = 0x00; /* Close timer */
}
void Delay_Sec(unsigned int DelayTimes) /* setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); /* 开启定时器Timer16_1时钟 */
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 60000; /* set prescaler to zero */
LPC_TMR16B1->MR0 = 200*DelayTimes;
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts */
LPC_TMR16B1->MCR = 0x04; /* stop timer on match */
LPC_TMR16B1->TCR = 0x01; /* start timer */
while (LPC_TMR16B1->TCR & 0x01); /* 等待直到时间到 */
LPC_TMR16B1->TCR = 0x00; /* Close timer */
}
Delay.h文件:
#ifndef __DELAY_H__
#define __DELAY_H__
void Delay_Us(unsigned int DelayTimes); /*微秒延时函数*/
void Delay_Ms(unsigned int DelayTimes); /*毫秒延时函数*/
void Delay_Sec(unsigned int DelayTimes); /*秒延时函数*/
#endif
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