Could it Possible to map hardware Interrupt on P3^2 () to pin P3^1 so when I press Switch on P3^1 Interrupt starts and make toggle the LED
Here is the Code :
But some how its for Switch 3 / Interrupt on Pin P3^2 so upon pressing switch 3 Interrupt occur and toggle led , but I want that upon pressing the Switch K1 the LED starts toggle
Code :

#include<reg51.h>
sbit LED = P2^0;      // LED at P2.0
void delay_ms(unsigned int ms) {
  unsigned int i, j;
  for (i = 0; i < ms; i++) {
    for (j = 0; j < 120; j++)
        {
        }// Approx 1ms delay in 8051 with 11.0592 MHz Crystal
  }
}

void ISR_External0(void) interrupt 0  // ISR for External Interrupt 0
{
    
  LED = ~LED;
    delay_ms(300);
}

void main()
{
  EA = 1;       // Enable Global Interrupts
  EX0 = 1;      // Enable External Interrupt 0
  IT0 = 1;      // falling edge // whwen we hold leds it will lock the state not blinking the leds // while IT0 = 0 makes blinking 
    // Because in low-level mode:

// The interrupt is active the entire time the pin is LOW (0) IT0 = 0 //    while IT0 = 1 detect one event per press 
// It stops only when the pin goes back to HIGH (1) //

  LED = 0;      // LED ON Initially // common anode mode // Anode is connected to Vcc of all leds 

  while(1)
    {
    }
}

 

Do you think it might be useful to at least tell people what microcontroller you are talking about?

 

there is mention of this in the code "8051 with 11.0592 MHz Crystal"