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Author: AashiDutt

Timer_interface/ckt.png

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+#include<reg52.h>
+
+void ms_delay();
+
+void main()
+{
+	
+	TMOD = 0X01; // timer 0 , mode 1,16 bit mode
+	while(1)
+	{
+		P1 = 0XFF; // sending high and low logic 
+		ms_delay();
+		P1 =0X00;
+		ms_delay();
+	}
+}
+
+void ms_delay()  // 5ms
+{
+	TL0=0X00;  // timer 0 low 
+	TH0=0X0EE; //timer 0 high (5ms)
+	TR0=1;     // turn ON timer 0
+	
+	while(!TF0); //  if overflow flag is high
+	TR0=0;     // turn timer off
+	TF0=0;     // clear the timer flag reg.
+}
+