t2test.c

该资料详细的介绍了T2定时器计数器的用法与作用

#include "STC89C51RC_RD_PLUS.H"

sbit led = P2^0;
unsigned char count;

void main()
{
	count =0;
	T2CON=0x04;
    T2MOD=0x00;
	TH2=0x3C;
      TL2=0xB0;
      RCAP2H=0x3C;
      RCAP2L=0xB0;
      TR2=1;
      ET2=1;

	TL2 = (65536-50000) % 256;
	TH2 = (65536-50000) / 256;
	EA = 1;
	TR2 = 1;
	ET2 = 1;
	while(1)
	{

	}

}

void timer2 (void) interrupt 5
{
EA = 0; 
TF2 = 0;

TL2 = (65536-50000) % 256;
	TH2 = (65536-50000) / 256;
	
	count ++;
	if (count == 10)
	{
		count = 0;
		led = !led;
	}
		
   EA = 1;
}