NXP_LPC1114延時函數集合

ID:73735 · 發表于 2015-2-18 23:19

#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 */
}

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NXP_LPC1114延時函數集合