NXP_LPC1114延時函數集合

#include "LPC11XX.h"

#include "gpio.h"

#include "timer16.h"

/*系統時鐘配置為48MHz，AHB不分頻，一次定時器時鐘為48Mhz，因此得出以下分頻值，匹配值*/

void Delay_Us(unsigned int DelayTimes)

{

/* * setup timer #1 for delay */

//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); /*開啟定時器Timer16_1時鐘--時鐘配置中開啟該時鐘*/

LPC_TMR16B1->TCR = 0x02; /* reset timer */

LPC_TMR16B1->PR = 48; /* set prescaler to zero 根據AHB時鐘確定分頻值*/

LPC_TMR16B1->MR0 = DelayTimes; /* 所需的延時時間 */

LPC_TMR16B1->IR = 0xff; /* reset all interrrupts 復位所有的中斷*/

LPC_TMR16B1->MCR = 0x04; /* stop timer on match --達到匹配停止*/

LPC_TMR16B1->TCR = 0x01; /* start timer 啟動定時器*/

while (LPC_TMR16B1->TCR & 0x01); /*等待直到時間到*/

LPC_TMR16B1->TCR = 0x00; /* Close timer --關閉定時器*/

}

void Delay_Ms(unsigned int DelayTimes)

{

/* * setup timer #1 for delay */

//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //開啟定時器Timer16_1時鐘

LPC_TMR16B1->TCR = 0x02; /* reset timer */

LPC_TMR16B1->PR = 48000; /* 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); /*等待直到時間到*/

LPC_TMR16B1->TCR = 0x00; /* Close timer */

}

void Delay_Sec(unsigned char DelayTimes)

{

/* * setup timer #1 for delay */

//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //開啟定時器Timer16_1時鐘

LPC_TMR16B1->TCR = 0x02; /* reset timer */

LPC_TMR16B1->PR = 48000000; /* 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); /*等待直到時間到*/

LPC_TMR16B1->TCR = 0x00; /* Close timer */

}