Can anyone explain/break down whats going on in this arduino code? const int arr
ID: 3898668 • Letter: C
Question
Can anyone explain/break down whats going on in this arduino code?
const int arraySize=102;
char var11='0';
int array1[arraySize]={1153, 6708, 7944, 5668, 1490, 8124, 2196, 9530, 903, 7722, 4666, 8549, 8024, 7801, 6853, 977, 7408, 8228, 4933, 298, 8981, 8635, 8013, 3865, 9814, 9063, 4536, 9425, 1669, 4115, 94, 5629, 6501, 6517, 4195, 105, 404, 9451, 4298, 2188, 1123, 9505, 6882, 6752, 1566, 6716, 337, 4438, 21, 1501, 4897, 6807, 5249, 73, 3658, 8930, 1272, 7544, 878, 7923, 7709, 4440, 8165, 4492, 3042, 7987, 2503, 2327, 1729, 8840, 2612, 4303, 3169, 7709, 7157, 9560, 933, 3099, 278, 1816, 5335, 9097, 7826, 3512, 9267, 3810, 7633, 979, 9149, 6579, 8821, 1967, 672, 1393, 9336, 5485, 1745, 5228, 4091, 194, 6357, 5001 };
int function1(int var1a[]){
int var1b=var1a[0];
for (int i=1; i<arraySize;i=i+1){//POINTA
if (var1b<var1a[i]){
var1b=var1a[i];
}
}
return var1b;
}
void function2(int var2a, int var2b, int var2c){
digitalWrite(var2a,HIGH);
delay(250);
digitalWrite(var2a,LOW);
delay(250);
digitalWrite(var2b,HIGH);
delay(250);
digitalWrite(var2b,LOW);
delay(250);
digitalWrite(var2c,HIGH);
delay(250);
digitalWrite(var2c,LOW);
delay(1000);
}
void function3(){
int j=0;
while (j<100){
j=j*j+1;
}
}
float function4(float var4a){
if (var4a>20){//POINTB
int var4b=pow(var4a,3)/22.5+array1[22]-PI;
return var4b;
}
else{
delay(5);
return function4(var4a+PI);//POINTC
}
}
int function5(char var5){
if (var5='A'){
return 7;
}
if (var5='B'){
return 14;
}
if (var5='C'){
return 11;
}
}
void function6(int a[], int var6) {
for(int i=0; i<(var6-1); i++) {
for(int o=0; o<(var6-(i+1)); o++) {
if(a[o] > a[o+1]) {
int t = a[o];
a[o] = a[o+1];
a[o+1] = t;
}
}
}
}
int function7(int var7){
if (var7<3){
var7=var7+1;
}
else if (var7<9){
var7=function4(var7);
}
else if(var7>12){
var7=20;
}
return var7;
}
void function8(int baudrate){
Serial.println("This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...");
}
int function9(float var9){
var9=var9*10;
int var9Int=var9;
var9=var9-var9Int;
if (var9<.5){
var9=0;
}
else{
var9=1;
}
var9=(var9+var9Int)/10;
return(var9);
}
int function10(int var10a[], int var10b, int var10c){
int i=var10b;
int var10d=0;
while (i<=var10c){
var10d=var10d+var10a[i];
}
return var10d;
}
void function11(){
var11=var11+4;
}
void setup(){
Serial.begin(9600);
pinMode(11,OUTPUT);
analogWrite(11,95);
attachInterrupt(digitalPinToInterrupt(2), function11,CHANGE);
}
void loop(){
long int startTime=millis();
//PointD
long int endTime = millis()-startTime;
Serial.print("The endTime is ");
Serial.println(endTime);
Serial.print("analogpin3 is ");
Serial.println(analogRead(3));
delay (2000);
}
Explanation / Answer
const int arraySize=102;
char var11='0';
int array1[arraySize]={1153, 6708, 7944, 5668, 1490, 8124, 2196, 9530, 903, 7722, 4666, 8549, 8024, 7801, 6853, 977, 7408, 8228, 4933, 298, 8981, 8635, 8013, 3865, 9814, 9063, 4536, 9425, 1669, 4115, 94, 5629, 6501, 6517, 4195, 105, 404, 9451, 4298, 2188, 1123, 9505, 6882, 6752, 1566, 6716, 337, 4438, 21, 1501, 4897, 6807, 5249, 73, 3658, 8930, 1272, 7544, 878, 7923, 7709, 4440, 8165, 4492, 3042, 7987, 2503, 2327, 1729, 8840, 2612, 4303, 3169, 7709, 7157, 9560, 933, 3099, 278, 1816, 5335, 9097, 7826, 3512, 9267, 3810, 7633, 979, 9149, 6579, 8821, 1967, 672, 1393, 9336, 5485, 1745, 5228, 4091, 194, 6357, 5001 };
// This function will return largest number from the given array
int function1(int var1a[]){
// Store first value from the array to variable
int var1b=var1a[0];
// Trace each values in array
for (int i=1; i<arraySize;i=i+1){//POINTA
// Check if value at pos i in array is greatee than varlb then store that value in variable
if (var1b<var1a[i]){
var1b=var1a[i];
}
}
// Return largest value
return var1b;
}
void function2(int var2a, int var2b, int var2c){
// digitalWrite() will enable (HIGH) or disable (LOW) the internal pullup on the input pin.
digitalWrite(var2a,HIGH); // sets the digital pin var2a on
delay(250); // waits for 250 millisecs
digitalWrite(var2a,LOW); // sets the digital pin var2a off
delay(250); // waits for 250 millisecs
digitalWrite(var2b,HIGH); // sets the digital pin var2b on
delay(250); // waits for 250 millisecs
digitalWrite(var2b,LOW); // sets the digital pin var2b off
delay(250); // waits for 250 millisecs
digitalWrite(var2c,HIGH); // sets the digital pin var2c on
delay(250); // waits for 250 millisecs
digitalWrite(var2c,LOW); // sets the digital pin var2c off
delay(1000); // waits for a second
}
void function3(){
// initialize variable j to 0
int j=0;
// Loop will execute until j is less than 100
while (j<100){
// Calculate new value for j
j=j*j+1;
}
}
float function4(float var4a){ // recursive function
if (var4a>20){//POINTB
int var4b=pow(var4a,3)/22.5+array1[22]-PI; // Make some calculation
return var4b; // Return calculated value
}
else{
delay(5); // waits for 5 millisecs
return function4(var4a+PI);//POINTC This recursively call itself until var4a becomes greater than 20
}
}
int function5(char var5){
// Check if var5 stores 'A' then return value 7
if (var5='A'){
return 7;
}
// Check if var5 stores 'B' then return value 14
if (var5='B'){
return 14;
}
// Check if var5 stores 'C' then return value 11
if (var5='C'){
return 11;
}
}
void function6(int a[], int var6) { // implements bubble sort
for(int i=0; i<(var6-1); i++) {
// Last i elements are already in place
for(int o=0; o<(var6-(i+1)); o++) {
if(a[o] > a[o+1]) { // Check first value is greater than second then replace both
int t = a[o];
a[o] = a[o+1];
a[o+1] = t;
}
}
}
}
int function7(int var7){
if (var7<3){ // If value of var7 is less than 3 then store var7 incremented by 1
var7=var7+1;
}
else if (var7<9){ // If value of var7 is greater or eqauls to 3 and less than 9 then call "function4"(Recursive function) and store value that function returns
var7=function4(var7);
}
else if(var7>12){ // If value of var7 is greater than 12 then store 20 as value
var7=20;
}
// Return new value of var7
return var7;
}
void function8(int baudrate){
// Prints data to the serial port as human-readable text
Serial.println("This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...This is the song that never ends, yes it goes on and on my friend. Some people started singing it, not knowing what it was, and they'll continue singing it forever just because...");
}
// This function will make some calculations and return calculated value
int function9(float var9){
var9=var9*10;
int var9Int=var9;
var9=var9-var9Int;
if (var9<.5){
var9=0;
}
else{
var9=1;
}
var9=(var9+var9Int)/10;
return(var9);
}
// This function move to infinite loop if value of var10b <= var10c
int function10(int var10a[], int var10b, int var10c){
int i=var10b;
int var10d=0;
while (i<=var10c){
var10d=var10d+var10a[i];
}
return var10d;
}
void function11(){
var11=var11+4; // Store value to '4' as char
}
// The setup() function is called when a sketch starts.
void setup(){
// Sets the data rate in bits per second (baud) for serial data transmission.
Serial.begin(9600);
// Sets the digital pin 11 as output
pinMode(11,OUTPUT);
// analogWrite(pin, value); Writes an analog value (PWM wave) to a pin
analogWrite(11,95);
// Digital Pins With Interrupts. When intrrupts occur(trigger the interrupt whenever the pin changes value) it will call "function11"
attachInterrupt(digitalPinToInterrupt(2), function11,CHANGE);
}
// After creating a setup() function, which initializes and sets the initial values, the loop() function does precisely what its name suggests, and loops consecutively, allowing your program to change and respond.
void loop(){
long int startTime=millis();
//PointD
long int endTime = millis()-startTime;
Serial.print("The endTime is ");
Serial.println(endTime);
Serial.print("analogpin3 is ");
Serial.println(analogRead(3));
delay (2000);
}