OD Gate and XOR Gate Test Verification

We used digital pin 7 (D7) to read the output of the AND gate/open-drain (OD). Please ensure that your OD gate output is connected to 5V through an external pull-up resistor, and that this pin is connected to the D7 pin of the Arduino UNO. In this way, when the OD gate outputs a low level, the D7 pin of the Arduino UNO will read a low level (0), and when the OD gate outputs a high level, the internal pull-up resistor will pull the D7 pin high to a high level (1).

Description

#include <LiquidCrystal.h>

// Initialize the LCD library, setting the Arduino pins connected to the LCD

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Define the pin connections for the buttons

const int sw1 = 8; // The first button is connected to D2

const int sw2 = 9; // The second button is connected to D3

// Define the pin connection for the LED

const int ledPin = 0; // The LED is connected to D13

// Define the pin connection for the AND gate/open-drain output

const int andODOutputPin = 7; // Assuming the AND gate/open-drain output is connected to D7

void setup() {

pinMode(sw1, INPUT_PULLUP);

pinMode(sw2, INPUT_PULLUP);

pinMode(ledPin, OUTPUT);

pinMode(andODOutputPin, INPUT); // Set as input mode

lcd.begin(16, 2); // Initialize the LCD for 16 columns and 2 rows

lcd.clear(); // Clear the screen

}

void loop() {

int input1 = digitalRead(sw1);

int input2 = digitalRead(sw2);

int andODResult = digitalRead(andODOutputPin); // Read the output of the AND gate/open-drain

int xorResult = input1 ^ input2; // Calculate the XOR result

digitalWrite(ledPin, xorResult); // Control the LED

// Display the results

lcd.clear(); // Clear the screen at the start of each loop

lcd.print("SW1: ");

lcd.print(input1);

lcd.print(" SW2: ");

lcd.print(input2);

lcd.setCursor(0, 1); // Set the cursor position to the second line

lcd.print("OD: ");

lcd.print(andODResult);

lcd.print(" XOR: ");

lcd.print(xorResult);

delay(500); // Wait for 500ms before measuring again

}