LPC1768之定时器TIMER0

时间:2020-12-01 23:37:53
/*************************************************************************************	  
*	main.c:  the main file 
*	NXP --> LPC1768
*
*   
*	Author	:	light					
*	Date	:	2012-4-23  
*
*	Email	:	lightwu@hotmail.com
***************************************************************************************/

#include <LPC17XX.h>
#include "GPIO.h"

volatile uint32_t Timer0Cont = 0;
/********************************************************************************
** Descriptions			:timer0 initialze
**
** parameters			:None
** Returned value		:None
*********************************************************************************/
void Timer0Init(void) 
{												
	LPC_SC->PCONP |= (1<<1);						//打开功率控制
	
	LPC_TIM0->TCR |= (1<<1);						//复位定时器
	LPC_TIM0->PR   = 0x00;							//预分频清零
	LPC_TIM0->MR0  = 10000;							//匹配寄存器与定时器计数器值相比较
	LPC_TIM0->IR  |= 0XFF;							//清所有中断标志位
	LPC_TIM0->MCR |= ((1<<1)|(1<<0));				//MR0与TC值匹配时将产生中断,TC复位
	LPC_TIM0->TCR  = (1<<0);						//启动定时器

	NVIC_EnableIRQ(TIMER0_IRQn);              		/* enable irq in nvic              */

}
/********************************************************************************
** Descriptions			:Timer0 interrupt
**
** parameters			:None 
** Returned value		:None
*********************************************************************************/
void TIMER0_IRQHandler(void)
{
	LPC_TIM0->IR |= (1<<0);			//清中断标志

	Timer0Cont++;
}


/*----------------------------------------------------------------------------
  The main Function 
 *----------------------------------------------------------------------------*/
int main(void)
{
	int loc;

	SystemInit();
	Timer0Init(); 
	LedInit();

	while(1)
	{

		if(1000 == Timer0Cont)
		{
			Timer0Cont = 0;
			loc = ~loc;
			if(!loc)
			{
				LedNOn(1);
				LedNOn(2);
			}
			else
			{
				LedNOff(1);
				LedNOff(2);	
			}
			
		}


/*			LedNOn(loc);
			DelayMs(1000);

			LedNOff(loc);
			DelayMs(1000);
*/

	}

}