timer32.c

LPC1114_例程和教程

/******************** (C) COPYRIGHT 2010 Embest Info&Tech Co.,LTD. ************
* 文件名: timer32.c
* 作者  : Wuhan R&D Center, Embest
* 日期  : 01/18/2010
* 描述  : 32位定时器相关的函数实现
*******************************************************************************
*******************************************************************************
* 历史:
* 01/18/2010		 : V1.0		   初始版本
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "LPC11xx.h"
#include "timer32.h"

volatile uint32_t timer32_0_counter = 0;
volatile uint32_t timer32_1_counter = 0;



/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/	
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/


/**
  * @函数名：delay32Ms
  * @描述：以间隔毫秒启动定时器直到时间耗完 
  * @参数：定时器号，以毫秒为单位的延迟时间
  * @返回值：无
  */
void delay32Ms(uint8_t timer_num, uint32_t delayInMs)
{
  if (timer_num == 0)
  {
    /* 建立定时器0的延迟 */
    /* 复位定时器 */
	LPC_TMR32B0->TCR = 0x02;		
    /* 设置预分频器为0 */
	LPC_TMR32B0->PR  = 0x00;		
    LPC_TMR32B0->MR0 = delayInMs * (SystemAHBFrequency / 1000);
    /* 复位所有的中断 */
	LPC_TMR32B0->IR  = 0xff;		
    /* 停止定时器匹配 */
	LPC_TMR32B0->MCR = 0x04;		
    /* 启动定时器 */
	LPC_TMR32B0->TCR = 0x01;		
  
    /* 等待直到延迟时间消耗完 */
    while (LPC_TMR32B0->TCR & 0x01);
  }
  else if (timer_num == 1)
  {
    /* 建立定时器1的延迟 */
    /* 复位定时器 */
	LPC_TMR32B1->TCR = 0x02;		
    /* 设置预分频器为0 */
	LPC_TMR32B1->PR  = 0x00;		
    LPC_TMR32B1->MR0 = delayInMs * (SystemAHBFrequency / 1000);
    /* 复位所有的中断 */
	LPC_TMR32B1->IR  = 0xff;		
    /* 停止定时器匹配 */
	LPC_TMR32B1->MCR = 0x04;		
    /* 启动定时器 */
	LPC_TMR32B1->TCR = 0x01;		
  
    /* 等待直到延迟时间消耗完 */
    while (LPC_TMR32B1->TCR & 0x01);
  }
  return;
}

/**
  * @函数名：TIMER32_0_IRQHandler
  * @描述：定时器/计数器0中断例程在60 MHz CPU时钟下每10ms执行一次
  * @参数：无
  * @返回值：无
  */
void TIMER32_0_IRQHandler(void)
{
  /* 清中断标志位 */	 
  LPC_TMR32B0->IR = 1;			
  timer32_0_counter++;
  return;
}

/**
  * @函数名：TIMER32_1_IRQHandler
  * @描述：定时器/计数器1中断例程在60 MHz CPU时钟下每10ms执行一次
  * @参数：无
  * @返回值：无
  */
void TIMER32_1_IRQHandler(void)
{
	/* 清中断标志位 */  
  LPC_TMR32B1->IR = 1;			
  timer32_1_counter++;
  return;
}

/**
  * @函数名：enable_timer
  * @描述：使能定时器
  * @参数：定时器号：0 或 1
  * @返回值：无
  */
void enable_timer32(uint8_t timer_num)
{
  if ( timer_num == 0 )
  {
    LPC_TMR32B0->TCR = 1;
  }
  else
  {
    LPC_TMR32B1->TCR = 1;
  }
  return;
}


/**
  * @函数名：disable_timer
  * @描述：禁止定时器
  * @参数：定时器号：0 或 1
  * @返回值：无
  */
void disable_timer32(uint8_t timer_num)
{
  if ( timer_num == 0 )
  {
    LPC_TMR32B0->TCR = 0;
  }
  else
  {
    LPC_TMR32B1->TCR = 0;
  }
  return;
}


/**
  * @函数名：reset_timer
  * @描述：重启定时器
  * @参数：定时器号：0 或 1
  * @返回值：无
  */
void reset_timer32(uint8_t timer_num)
{
  uint32_t regVal;

  if ( timer_num == 0 )
  {
    regVal = LPC_TMR32B0->TCR;
    regVal |= 0x02;
    LPC_TMR32B0->TCR = regVal;
  }
  else
  {
    regVal = LPC_TMR32B1->TCR;
    regVal |= 0x02;
    LPC_TMR32B1->TCR = regVal;
  }
  return;
}


/**
  * @函数名：init_timer
  * @描述：初始化定时器，设置定时器间隔，复位定时器设置定时器中断例程
  * @参数：定时器号和定时器间隔
  * @返回值：无
  */
void init_timer32(uint8_t timer_num, uint32_t TimerInterval) 
{
  if ( timer_num == 0 )
  {
    /* 因为JTAG和定时器CAP/MAT管脚是混合使用的如果在使用了该模块是一些 I/O 管脚语言仔细的配置。 */
    LPC_SYSCON->SYSAHBCLKCTRL |= (1<<9);
    
	/*  Timer0_32 I/O 配置 */
	/* Timer0_32 CAP0 */
	LPC_IOCON->PIO1_5 &= ~0x07;	
    LPC_IOCON->PIO1_5 |= 0x02;	
    /* Timer0_32 MAT0 */
	LPC_IOCON->PIO1_6 &= ~0x07;
    LPC_IOCON->PIO1_6 |= 0x02;	
    /* Timer0_32 MAT1 */
	LPC_IOCON->PIO1_7 &= ~0x07;
    LPC_IOCON->PIO1_7 |= 0x02;	
    /* Timer0_32 MAT2 */
	LPC_IOCON->PIO0_1 &= ~0x07;	
    LPC_IOCON->PIO0_1 |= 0x02;	
#ifdef __JTAG_DISABLED
    /* Timer0_32 MAT3 */
	LPC_IOCON->JTAG_TDI_PIO0_11 &= ~0x07;	
    LPC_IOCON->JTAG_TDI_PIO0_11 |= 0x03;	
#endif

    timer32_0_counter = 0;
    LPC_TMR32B0->MR0 = TimerInterval;
//	LPC_TMR32B0->EMR &= ~(0xFF<<4);
//	LPC_TMR32B0->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8)|(0x3<<10));	/* MR0/1/2/3 Toggle */
    /* MR0上的中断和复位  */
	LPC_TMR32B0->MCR = 3;			

    /* 使能TIMER0中断 */
    NVIC_EnableIRQ(TIMER_32_0_IRQn);
  }
  else if ( timer_num == 1 )
  {
    /* 因为JTAG和定时器CAP/MAT管脚是混合使用的如果在使用了该模块是一些 I/O 管脚语言仔细的配置。 */
    LPC_SYSCON->SYSAHBCLKCTRL |= (1<<10);
#ifdef __JTAG_DISABLED
    /*  Timer1_32 I/O 配置 */
	/* Timer1_32 CAP0 */
	LPC_IOCON->JTAG_TMS_PIO1_0  &= ~0x07;	
    LPC_IOCON->JTAG_TMS_PIO1_0  |= 0x03;	
    /* Timer1_32 MAT0 */
	LPC_IOCON->JTAG_TDO_PIO1_1  &= ~0x07;	
    LPC_IOCON->JTAG_TDO_PIO1_1  |= 0x03;	
    /* Timer1_32 MAT1 */
	LPC_IOCON->JTAG_nTRST_PIO1_2 &= ~0x07;
    LPC_IOCON->JTAG_nTRST_PIO1_2 |= 0x03;	
    /* Timer1_32 MAT2 */
	LPC_IOCON->ARM_SWDIO_PIO1_3  &= ~0x07;
    LPC_IOCON->ARM_SWDIO_PIO1_3  |= 0x03;	
#endif
    /* Timer0_32 MAT3 */
	LPC_IOCON->PIO1_4 &= ~0x07;
    LPC_IOCON->PIO1_4 |= 0x02;		

    timer32_1_counter = 0;
    LPC_TMR32B1->MR0 = TimerInterval;
//	LPC_TMR32B1->EMR &= ~(0xFF<<4);
//	LPC_TMR32B1->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8));	/* MR0/1/2 Toggle */
    	/* MR0上的中断和复位  */
	LPC_TMR32B1->MCR = 3;		

    /* 使能TIMER1中断 */
    NVIC_EnableIRQ(TIMER_32_1_IRQn);
  }
  return;
}
/**
  * @}
  */ 

/**
  * @}
  */ 
/************* (C) COPYRIGHT 2010 Wuhan R&D Center, Embest *****文件结束*******/