问如何获取值并保存它们，以便以后在Arduino上使用？

EN

#include "Reference.h"
#include <Keypad.h>

char keypad_referenceNumber[9];
char keypad_SPEED[4];
char keypad_STEPS[6];

int counter = 0;

const byte ROWS = 4;
const byte COLS = 3;

char keys[ROWS][COLS] = {
    { '1', '2', '3' },
    { '4', '5', '6' },
    { '7', '8', '9' },
    { '*', '0', '#' }
};

byte rowPins[ROWS] = { 8, 7, 6, 5 };
byte colPins[COLS] = { 4, 3, 2 };

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

int data_referenceNumber;
int data_SPEED;
int data_STEPS;

List* myList;

void setup()
{
    // put your setup code here, to run once:

    Serial.begin(9600);

    // Initialize the first element of the list
    List* myList = initialisation();
}

void loop()
{
    // put your main code here, to run repeatedly:

    // get from the keypad the reference number
    getreferenceNumber();
    // get from the keypad the speed
    getSPEED();
    // get from the keypad the steps
    getSTEPS();
    // Add a new reference to the list
    addNewReference(myList, data_referenceNumber, data_SPEED, data_STEPS);
    // Display the list of references
    displayList(myList);

} // END LOOP
// function to get the reference number
void getreferenceNumber()
{

    char key = keypad.getKey();

    if (key != NO_KEY) {

        keypad_referenceNumber[counter++] = key;
        keypad_referenceNumber[counter] = '\0';

        Serial.print(key);

        if (key == '#') {

            data_referenceNumber = atoi(keypad_referenceNumber);

            Serial.println(data_referenceNumber);

            counter = 0;
        }
    }
}
//function to get speed value from keypad
void getSPEED()
{

    char key = keypad.getKey();
    if (key != NO_KEY) {
        keypad_SPEED[counter++] = key;
        keypad_SPEED[counter] = '\0';

        if (key == '#') {
            data_SPEED = atoi(keypad_SPEED);
            Serial.println(data_SPEED);
            counter = 0;
        }
    }
}
// function to get the steps value from keypad
void getSTEPS()
{
    char key = keypad.getKey();
    if (key != NO_KEY) {
        keypad_STEPS[counter++] = key;
        keypad_STEPS[counter] = '\0';

        if (key == '#') {
            data_STEPS = atoi(keypad_STEPS);
            Serial.println(data_STEPS);
            counter = 0;
        }
    }
}

//function to initialize the first element of the list
List* initialisation()
{
    List* list;
    References* references;

    if (list == NULL || references == NULL) {
        exit(EXIT_FAILURE);
    }

    references->referenceNumber = 0;
    references->SPEED = 0;
    references->STEPS = 0;

    references->next = NULL;
    list->firstElement = references;

    return list;
};
// Function to add a new reference
// x : reference number
// y : speed
// z : steps
void addNewReference(List* list, int x, int y, int z)
{
    References* newReference;

    if (list == NULL || newReference == NULL) {
        exit(EXIT_FAILURE);
    }
    newReference->referenceNumber = x;
    newReference->SPEED = y;
    newReference->STEPS = z;

    newReference->next = list->firstElement;

    list->firstElement = newReference;
}
// function to display to list of references
void displayList(List* list)
{
    if (list == NULL) {
        exit(EXIT_FAILURE);
    }
    References* current = list->firstElement;

    while (current != NULL) {
        Serial.println(current->referenceNumber);
        Serial.println(current->SPEED);
        Serial.println(current->STEPS);

        current = current->next;
    }
    Serial.println("NULL");
}

#ifndef _REFERENCE_H_
#define _REFERENCE_H_

typedef struct References References;
struct References { 
    int referenceNumber;
    int SPEED;
    int STEPS;  
    References *next;    
};

typedef struct List List;
struct List {
    References *firstElement; 
};

#endif