Problem with a ps2 keyboards signaling to an ESP32

[tbomo]

Hello thank you for listening, I am a beginner and I am currently having a problem with getting a PS2Keyboard to connect properly to an esp32-wrover. Specifically, pins 32/data and 32/Clock are not sending out the proper information, and the keyboards signal leds that flash once when it's fully connected. This time I used my power supply to generate 5-volt power and ground to initially supply pins 3/Gnd and 4/Vcc and I used the correct 2k ohm and 120-ohm resistors and connected them according to this diagram here:

I have also tried to use a different keyboard and connect it to that keyboard specifically, but that hasn't worked either.
here is the example of what I am trying to get to work:

#include "fabgl.h"

#include "vtanimations.h"



fabgl::VGA16Controller DisplayController;
fabgl::Terminal        Terminal;


void setup()
{
  //Serial.begin(115200); delay(500); Serial.write("\n\n\n"); // DEBUG ONLY

  DisplayController.begin();
  DisplayController.setResolution(VGA_640x480_60Hz);

  Terminal.begin(&DisplayController);
  //Terminal.setLogStream(Serial);  // DEBUG ONLY

  Terminal.enableCursor(true);
}


void slowPrintf(const char * format, ...)
{
  va_list ap;
  va_start(ap, format);
  int size = vsnprintf(nullptr, 0, format, ap) + 1;
  if (size > 0) {
    va_end(ap);
    va_start(ap, format);
    char buf[size + 1];
    vsnprintf(buf, size, format, ap);
    for (int i = 0; i < size; ++i) {
      Terminal.write(buf[i]);
      delay(25);
    }
  }
  va_end(ap);
}


void demo1()
{
  Terminal.write("\e[40;92m"); // background: black, foreground: green
  Terminal.write("\e[2J");     // clear screen
  Terminal.write("\e[1;1H");   // move cursor to 1,1
  slowPrintf("* * * *  W E L C O M E   T O   F a b G L  * * * *\r\n");
  slowPrintf("2019-2021 by Fabrizio Di Vittorio - www.fabgl.com\r\n");
  slowPrintf("=================================================\r\n\n");
  slowPrintf("A Display Controller, PS2 Mouse and Keyboard Controller, Graphics Library, Audio Engine, Game Engine and ANSI/VT Terminal for the ESP32\r\n\n");
  slowPrintf("Current settings\r\n");
  slowPrintf("Screen Size   : %d x %d\r\n", DisplayController.getScreenWidth(), DisplayController.getScreenHeight());
  slowPrintf("Viewport Size : %d x %d\r\n", DisplayController.getViewPortWidth(), DisplayController.getViewPortHeight());
  slowPrintf("Terminal Size : %d x %d\r\n", Terminal.getColumns(), Terminal.getRows());
  slowPrintf("Free Memory   : %d bytes\r\n\n", heap_caps_get_free_size(MALLOC_CAP_32BIT));
}

void demo2()
{
  Terminal.write("\e[40;32m"); // background: black, foreground: green
  slowPrintf("8 or 64 colors supported\r\n");
  slowPrintf("ANSI colors:\r\n");
  // foregrounds
  Terminal.write("\e[31mRED\t"); delay(500);
  Terminal.write("\e[32mGREEN\t"); delay(500);
  Terminal.write("\e[33mYELLOW\t"); delay(500);
  Terminal.write("\e[34mBLUE\t"); delay(500);
  Terminal.write("\e[35mMAGENTA\t"); delay(500);
  Terminal.write("\e[36mCYAN\t"); delay(500);
  Terminal.write("\e[37mWHITE\r\n"); delay(500);
  Terminal.write("\e[90mHBLACK\t"); delay(500);
  Terminal.write("\e[91mHRED\t"); delay(500);
  Terminal.write("\e[92mHGREEN\t"); delay(500);
  Terminal.write("\e[93mHYELLOW\t"); delay(500);
  Terminal.write("\e[94mHBLUE\t"); delay(500);
  Terminal.write("\e[95mHMAGENTA\t"); delay(500);
  Terminal.write("\e[96mHCYAN\t"); delay(500);
  Terminal.write("\e[97mHWHITE\r\n"); delay(500);
  // backgrounds
  Terminal.write("\e[40mBLACK\t"); delay(500);
  Terminal.write("\e[41mRED\e[40m\t"); delay(500);
  Terminal.write("\e[42mGREEN\e[40m\t"); delay(500);
  Terminal.write("\e[43mYELLOW\e[40m\t"); delay(500);
  Terminal.write("\e[44mBLUE\e[40m\t"); delay(500);
  Terminal.write("\e[45mMAGENTA\e[40m\t"); delay(500);
  Terminal.write("\e[46mCYAN\e[40m\t"); delay(500);
  Terminal.write("\e[47mWHITE\e[40m\r\n"); delay(500);
  Terminal.write("\e[100mHBLACK\e[40m\t"); delay(500);
  Terminal.write("\e[101mHRED\e[40m\t"); delay(500);
  Terminal.write("\e[102mHGREEN\e[40m\t"); delay(500);
  Terminal.write("\e[103mHYELLOW\e[40m\t"); delay(500);
  Terminal.write("\e[104mHBLUE\e[40m\t"); delay(500);
  Terminal.write("\e[105mHMAGENTA\e[40m\t"); delay(500);
  Terminal.write("\e[106mHCYAN\e[40m\r\n"); delay(500);
}

void demo3()
{
  Terminal.write("\e[40;32m"); // background: black, foreground: green
  slowPrintf("\nSupported styles:\r\n");
  slowPrintf("\e[0mNormal\r\n");
  slowPrintf("\e[1mBold\e[0m\r\n");
  slowPrintf("\e[3mItalic\e[0m\r\n");
  slowPrintf("\e[4mUnderlined\e[0m\r\n");
  slowPrintf("\e[5mBlink\e[0m\r\n");
  slowPrintf("\e[7mInverse\e[0m\r\n");
  slowPrintf("\e[1;3mBoldItalic\e[0m\r\n");
  slowPrintf("\e[1;3;4mBoldItalicUnderlined\e[0m\r\n");
  slowPrintf("\e[1;3;4;5mBoldItalicUnderlinedBlinking\e[0m\r\n");
  slowPrintf("\e[1;3;4;5;7mBoldItalicUnderlinedBlinkingInverse\e[0m\r\n");
  slowPrintf("\e#6Double Width Line\r\n");
  slowPrintf("\e#6\e#3Double Height Line\r\n"); // top half
  slowPrintf("\e#6\e#4Double Height Line\r\n"); // bottom half
}

void demo4()
{
  Canvas cv(&DisplayController);
  Terminal.write("\e[40;32m"); // background: black, foreground: green
  slowPrintf("\nMixed text and graphics:\r\n");
  slowPrintf("Points...\r\n");
  for (int i = 0; i < 500; ++i) {
    cv.setPenColor(random(256), random(256), random(256));
    cv.setPixel(random(cv.getWidth()), random(cv.getHeight()));
    delay(15);
  }
  delay(500);
  slowPrintf("\e[40;32mLines...\r\n");
  for (int i = 0; i < 50; ++i) {
    cv.setPenColor(random(256), random(256), random(256));
    cv.drawLine(random(cv.getWidth()), random(cv.getHeight()), random(cv.getWidth()), random(cv.getHeight()));
    delay(50);
  }
  delay(500);
  slowPrintf("\e[40;32mRectangles...\r\n");
  for (int i = 0; i < 50; ++i) {
    cv.setPenColor(random(256), random(256), random(256));
    cv.drawRectangle(random(cv.getWidth()), random(cv.getHeight()), random(cv.getWidth()), random(cv.getHeight()));
    delay(50);
  }
  delay(500);
  slowPrintf("\e[40;32mEllipses...\r\n");
  for (int i = 0; i < 50; ++i) {
    cv.setPenColor(random(256), random(256), random(256));
    cv.drawEllipse(random(cv.getWidth()), random(cv.getHeight()), random(cv.getWidth()), random(cv.getHeight()));
    delay(50);
  }
  for (int i = 0; i < 30; ++i) {
    Terminal.write("\e[40;32mScrolling...\r\n");
    delay(250);
  }
  cv.clear();
}

void demo5()
{
  Terminal.write("\e[40;93m"); // background: black, foreground: yellow
  Terminal.write("\e[2J");     // clear screen
  slowPrintf("\e[10;56HFast Rendering");
  slowPrintf("\e[12;50HThis is a VT/ANSI animation");
  Terminal.write("\e[20h"); // automatic new line on
  Terminal.write("\e[92m"); // light-green
  Terminal.enableCursor(false);
  for (int j = 0; j < 4; ++j) {
    for (int i = 0; i < sizeof(vt_animation); ++i) {
      Terminal.write(vt_animation[i]);
      if (vt_animation[i] == 0x1B && vt_animation[i + 1] == 0x5B && vt_animation[i + 2] == 0x48)
        delay(120); // pause 100ms every frame
    }
  }
  Terminal.enableCursor(true);
  Terminal.write("\e[20l"); // automatic new line off
}

void demo6()
{
  Terminal.write("\e[40;32m"); // background: black, foreground: green
  Terminal.setColorForAttribute(CharStyle::Bold, Color::BrightYellow, true);
  Terminal.setColorForAttribute(CharStyle::Italic, Color::BrightRed, true);
  Terminal.setColorForAttribute(CharStyle::Underline, Color::BrightWhite, true);
  slowPrintf("\nColored Attributes with styles:\r\n");
  slowPrintf("\e[0mNormal\r\n");
  slowPrintf("\e[1mBold\e[0m\r\n");
  slowPrintf("\e[3mItalic\e[0m\r\n");
  slowPrintf("\e[4mUnderlined\e[0m\r\n");

  delay(1000);

  Terminal.setColorForAttribute(CharStyle::Bold, Color::BrightYellow, false);
  Terminal.setColorForAttribute(CharStyle::Italic, Color::BrightRed, false);
  Terminal.setColorForAttribute(CharStyle::Underline, Color::BrightWhite, false);
  slowPrintf("\nColored Attributes without styles:\r\n");
  slowPrintf("\e[0mNormal\r\n");
  slowPrintf("\e[1mBold\e[0m\r\n");
  slowPrintf("\e[3mItalic\e[0m\r\n");
  slowPrintf("\e[4mUnderlined\e[0m\r\n");

  Terminal.setColorForAttribute(CharStyle::Bold);
  Terminal.setColorForAttribute(CharStyle::Italic);
  Terminal.setColorForAttribute(CharStyle::Underline);
}


void loop()
{
  delay(1000);
  demo1();
  delay(4000);
  demo2();
  delay(4000);
  demo3();
  delay(4000);
  demo4();
  delay(4000);
  demo5();
  delay(4000);
  demo6();
  delay(4000);
}

Any help would be greatly appretiated.

[Idahowalker]

The voltage divider, as shown, is not correct.

[Paul_B]

I doubt that is correct either.

Can't recall exactly how PS/2 works but I am pretty sure you have to drive the device (keyboard or mouse) with the clock, so I would say you need to drive it with 5 V levels, not 3.3 V let alone attenuated 3.3 V.

Much as ESPs are more powerful processors than Arduinox, I think you are better off using an Arduino (such a Nano, not UNO! ) for this particular project not requiring WiFi.

[tbomo]

Hello, Paul thank you for your response, would a nano be fully capable of running something like Fabgl? the reason I am asking this is that in the future I would like to try the PCE emulator example because I wanted to see what it does.

[tbomo]

Very well, thank you Idahowalker I will rewire my circuit accordingly!

[Paul_B]

@tbomo

would a Nano be fully capable of running something like Fabgl?

I suppose were I to have even the slightest idea what "Fabgl" actually was, I might be able to assist you.

Does it involve WiFi which would require an ESP? Does it require a lot of RAM or a lot of fast computation?

[tbomo]

Hello, Paul thank you again, Fabgl is a library that allows you to use ps2controllers and VGA interfaces to make game consoles, terminals, and even full-blown pcs like emulating a Windows 3 computer that has graphics pre-built inside the program itself. Fabgl is located on GitHub but you can also search it from you manage libraries button on your toolbar. It also unfortunately only works with an esp32 revision 1 or higher as I have looked at it. In the example, I have shown you would also need wifi as well which unfortunately does not come with a nano.