Microcontroller Program to generate a square wave of 10 Hz at pin P1.0 of 8051 using timer

#include <reg51.h> // include 8051 register file
sbit pin = P1^0; // decleare a variable type sbit
for P1.0
main()
{
P1 = 0x00; // clear port
TMOD = 0x09; // initialize timer 0 as 16 bit timer
loop:TL0 = 0xAF; // load valur 15535 = 3CAFh so after
TH0 = 0x3C; // 50000 counts timer 0 will be
overflow
pin = 1; // send high logic to P1.0
TR0 = 1; // start timer
while(TF0 == 0) {} // wait for first overflow for 50 ms
TL0 = 0xAF; // again reload count
TH0 = 0x3C;
pin = 0; // now send 0 to P1.0
while(TF0 == 0) {} // wait for 50 ms again
goto loop; // continue with the loop
}

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