TSOP

TSOP.c

#include <LCD.h>
sbit IR=P1^0;

// intuitive code

void main()
{
    LCD_INIT();
    while(1) {
        if(IR == 0) {
            LCD_CMD(LCD_CLEAR);
            LCD_WRITE("Detected", 0, 0);
        } else {
            LCD_CMD(LCD_CLEAR);
            LCD_WRITE("Not detected", 0, 0);
        }
				delay(500);
    }
}

// image
// https://i1.wp.com/embetronicx.com/wp-content/uploads/2017/11/ir-sensor-interfacing-with-8051.jpg?resize=768%2C424&ssl=1