gk_timer0.c

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/*------------------------------------------------------------------------------
uPSD_TIMER.C
------------------------------------------------------------------------------*/

//#pragma CODE					// include assembler listing in .lst file

#include ".\include\gk_timer0.h"
#include ".\include\reg52.h"
#include ".\include\gk_extern_var.h"

#include <intrins.h>

#define TIMER0_INTERVAL		0xF8CC		// set timer T0 for 1ms tick
static int kkkkk=100;

					
/*------------------------------------------------------------------------------
			  Local Variable Declarations
------------------------------------------------------------------------------*/

//static unsigned int timer0_tick;

/*------------------------------------------------------------------------------
static void timer0_isr (void);

This function is an interrupt service routine for TIMER 0.  It should never
be called by a C or assembly function.  It will be executed automatically
when TIMER 0 overflows.
------------------------------------------------------------------------------*/

static void gk_timer0_isr (void) interrupt 1 using 1
{
//	TR0 = 0;								// stop timer 0 
//	TL0 = TL0 + (TIMER_INTERVAL & 0x00FF);	// Update LSB
//	TH0 = TH0 + (TIMER_INTERVAL >> 8);		// Update MSB
//	TR0 = 1;								// start timer 0
	TL0 = (TIMER0_INTERVAL & 0x00FF);		// set LSB timeout
	TH0 = (TIMER0_INTERVAL >> 8);			// set MSB timeout
	
	if(COMM_INT_FALG_1)	//通讯1超时监测
	{
		SERIAL_TIME_FACTOR_1++;
		if(SERIAL_TIME_FACTOR_1>100)				//30ms
		{
			START_FLAG_1=0;
			FUNC_FLAG_1=0;
			SYNC_FLAG_1=0;
			LENG_FLAG_1=0;
			SERIAL_TIME_FACTOR_1=0;
			COMM_INT_FALG_1=0;
//			SERIAL_R_COMPLETE_1=0;			//
		}
	}
	kkkkk++;
}

/*------------------------------------------------------------------------------
void timer0_initialize (void);

This function enables TIMER 0.  TIMER 0 will generate a synchronous interrupt
once every 100Hz (10mS).
------------------------------------------------------------------------------*/
void gk_timer0_initialize (void)		// Enable TMR0 for 10mS interrupts
{
//	EA = 0;				// disable interrupts

	TR0 = 0;			// stop timer 0
	TMOD &= ~0x0F;			// clear timer 0 mode bits
	TMOD |= 0x01;			// put timer 0 into 16-bit no prescale
	TL0 = (TIMER0_INTERVAL & 0x00FF);// set LSB timeout
	TH0 = (TIMER0_INTERVAL >> 8);	// set MSB timeout
	PT0 = 1;			// timer0 is 1st priority
	ET0 = 1;			// enable timer 0 interrupt
	TR0 = 1;			// start timer 0
//	EA = 1;				// enable interrupts
	IE&=0x7F;
}