7-Segment Display with Switch/Case

int a = 6;
int b = 5;
int c = 2;
int d = 3;
int e = 4;
int f = 7;
int g = 8;
int p = 9;

void setup() {
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(a, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(p, OUTPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  Serial.begin(9600);
}

int num = 1;
int xvalue;

void loop() {
  
  LEDplay(num);
  delay(1000);
  xvalue = analogRead(A1);
  
  if(xvalue > 1000){
    num = num+1;
    num = num%10;
  }
  if(xvalue < 10){
    num = num-1;
    num = num%10;
  }
  if(num < 0){
    num = 9;
  }
  
}

void LEDplay(int num){
  switch (num) {
    case 0:
      zero();
      break;
    case 1:
      one();
      break;
    case 2:
      two();
      break;
    case 3:
      three();
      break;
    case 4:
      four();
      break;
    case 5:
      five();
      break;
    case 6:
      six();
      break;
    case 7:
      seven();
      break;
    case 8:
      eight();
      break;
    case 9:
      nine();
      break;
    default:
      //do nothing
      break;
  }
}

void one(){
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  digitalWrite(p, LOW);
}

void two(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void three(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void four(){
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void five(){
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void six(){
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void seven(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  digitalWrite(p, LOW);
}

void eight(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void nine(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(p, LOW);
}

void zero(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
  digitalWrite(p, LOW);
}


Arduino Joystick Demo

 


 int joyPin1 = A0;                 // slider variable connected to analog pin 0
 int joyPin2 = A1;                 // slider variable connected to analog pin 1
 int value1 = 0;                  // variable to read the value from the analog pin 0
 int value2 = 0;                  // variable to read the value from the analog pin 1

 void setup() {
  pinMode(joyPin1, INPUT);              
  pinMode(joyPin2, INPUT); 
  Serial.begin(9600);
 }

 void loop() {
  value1 = analogRead(joyPin1);             
  value2 = analogRead(joyPin2);  

  delay(100);
  Serial.print("Pin1: ");
  Serial.print(value1);
  Serial.print(" Pin2: ");
  Serial.println(value2);
}

Source.

Arduino Serial Demo

void setup() {
  Serial.begin(9600);
}
int i = 1;
void loop() {
  Serial.println("Each line of code will be delayed by 1 second");
  delay(1000);
  Serial.println("Also, integer i will count upwards by one!");
  delay(1000);
  Serial.println(i);
  i = i+1;
}

Running a C Program from Python

import subprocess
 
cmd = "nameOfCProgram.c"
# Example
# cmd = HelloWorld.c
print ("Hey this is Python Script Running\n")
subprocess.call(["gcc",cmd]) #For Compiling
subprocess.call("./a.out") 
 
#end thats all

The C Code

// DO KEEP BOTH PROGRAMS IN SAME LOCATION
// HelloWorld.c

#include<stdio.h>

int main()
{
printf("Hello World\n");
printf("This C program Running\n");
return 0;
}