Write a VHDL code to use two ultrasonic sensors as detectors,placed one at entrance and other at exit of a parking space. Whenthe ultrasonic detects a car, use a counter to count the carsentering and decrement when a car exits. There is an RGB led placeat each gate (entry &exit) which is used to indicate openingand closing of gates. Entry gate LED turns green when car detectedand space available. LED stays red when no car detected, or cardetected but no space available. Exit LED stays red but turns greenwhen car detected by ultrasonic.
