User Interface, Using A buffer with a module

Projects Programming
9

sterretje:
When the '\n' is received, a flag is set to indicate that the message is complete and sets 'ndx' to 0 for the next
For a 'a', you should see 61, for a 'b' 62 and so on. For a '0' you should see '30', for '1' you should see '31' etc. See asciitable.com

Great! I will try to get the library for you... It was so long ago I can't remember where I got it.

Hardware:

  1. Arduino MEGA

  2. Ps2 Adapter: https://www.amazon.com/gp/product/B00XRRNV4A/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

  3. Keyboard: https://www.amazon.com/gp/product/B0075W8C8S/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Ok. So I ran this code:

// Example 2 - Receive with an end-marker

#include <PS2Keyboard.h> //Keyboard

const byte numChars = 32;
char receivedChars[numChars];   // an array to store the received data

const int DataPin = 18;
const int IRQpin =  19;

boolean newData = false;

PS2Keyboard keyboard;

void setup() {
    Serial.begin(9600);
    keyboard.begin(DataPin, IRQpin);
    Serial.println("<Arduino is ready>");
}

void loop() {
    recvWithEndMarker();
    showNewData();
}

void recvWithEndMarker() {
    static byte ndx = 0;
    char endMarker = '\n';
    char rc;
    
   while (keyboard.available() > 0 && newData == false)
  {
    Serial.println("characters available");
    rc = keyboard.read();
    Serial.print(rc, HEX);

    if (rc != endMarker)
    {
            receivedChars[ndx] = rc;
            ndx++;
            if (ndx >= numChars) {
                ndx = numChars - 1;
            }
    }
    else
    {
      Serial.println("  endMarker received");
receivedChars[ndx] = '\0'; // terminate the string
            ndx = 0;
            newData = true;
    }
}
}

void showNewData() {
    if (newData == true) {
        Serial.print("This just in ... ");
        Serial.println(receivedChars);
        newData = false;
    }
}

On the serial monitor, I got this:

<Arduino is ready>
characters available
63characters available
67characters available
61characters available
64characters available
64characters available
65characters available
61characters available
65characters available
72characters available

61 was infact the letter A!
The letter B was 62!

When I hit ENTER on the keyboard, it prints the letter "D"

Where should I go from here? With this current code, are all the values being stored into the buffer? Can I just print the buffer and have all the numbers displayed on the same line, in the same thing?

Thanks SO much for the help so far!