Unable to use mouse pointer when using FabGls PC Emulator on a ESP32

Hello there, I am currently having a problem with my PS2 mouse using my ESP-32-Wrover board. I am unable to make the mouse pointer appear properly when I move the mouse side to side. I have followed the PS2 Diagram as shown here:

this is the example code I was using from the FabGl library as well for the context of this situation:

  


#pragma message "This sketch requires Tools->Partition Scheme = Huge APP"


#include "esp32-hal-psram.h"
extern "C" {
#include "esp_spiram.h"
}
#include "esp_sntp.h"

#include <Preferences.h>
#include <WiFi.h>
#include <HTTPClient.h>

#include "fabgl.h"

#include "machine.h"


using fabgl::StringList;
using fabgl::imin;
using fabgl::imax;



struct DiskConf {
  char const * desc;
  char const * diskA_URL;
  char const * diskC_URL;
};

static const DiskConf diskConfs[] = {
  { "FreeDOS (A:)",                               "http://www.fabglib.org/downloads/A_freedos.img",  nullptr },
  { "FreeDOS (A:) + DOS Programming Tools (C:)",  "http://www.fabglib.org/downloads/A_freedos.img",  "http://www.fabglib.org/downloads/C_dosdev.img" },
  { "FreeDOS (A:) + Windows 3.0 Hercules (C:)",   "http://www.fabglib.org/downloads/A_freedos.img",  "http://www.fabglib.org/downloads/C_winherc.img" },
  { "FreeDOS (A:) + DOS Programs and Games (C:)", "http://www.fabglib.org/downloads/A_freedos.img",  "http://www.fabglib.org/downloads/C_dosprog.img" },
  { "MS-DOS 3.31 (A:)",                           "http://www.fabglib.org/downloads/A_MSDOS331.img", nullptr },
  { "Linux ELKS 0.4.0",                           "http://www.fabglib.org/downloads/A_ELK040.img",   nullptr },
  { "CP/M 86 + Turbo Pascal 3",                   "http://www.fabglib.org/downloads/A_CPM86.img",    nullptr },
};


Preferences preferences;
InputBox    ibox;
Machine     * machine;


// try to connected using saved parameters
bool tryToConnect()
{
  bool connected = WiFi.status() == WL_CONNECTED;
  if (!connected) {
    char SSID[32] = "";
    char psw[32]  = "";
    if (preferences.getString("SSID", SSID, sizeof(SSID)) && preferences.getString("WiFiPsw", psw, sizeof(psw))) {
      ibox.progressBox("", "Abort", true, 200, [&](fabgl::ProgressApp * app) {
        WiFi.begin(SSID, psw);
        for (int i = 0; i < 32 && WiFi.status() != WL_CONNECTED; ++i) {
          if (!app->update(i * 100 / 32, "Connecting to %s...", SSID))
            break;
          delay(500);
          if (i == 16)
            WiFi.reconnect();
        }
        connected = (WiFi.status() == WL_CONNECTED);
      });
      // show to user the connection state
      if (!connected) {
        WiFi.disconnect();
        ibox.message("", "WiFi Connection failed!");
      }
    }
  }
  return connected;
}


bool checkWiFi()
{
  bool connected = tryToConnect();
  if (!connected) {

    // configure WiFi?
    if (ibox.message("WiFi Configuration", "Configure WiFi?", "No", "Yes") == InputResult::Enter) {

      // repeat until connected or until user cancels
      do {

        // yes, scan for networks showing a progress dialog box
        int networksCount = 0;
        ibox.progressBox("", nullptr, false, 200, [&](fabgl::ProgressApp * app) {
          app->update(0, "Scanning WiFi networks...");
          networksCount = WiFi.scanNetworks();
        });

        // are there available WiFi?
        if (networksCount > 0) {

          // yes, show a selectable list
          StringList list;
          for (int i = 0; i < networksCount; ++i)
            list.appendFmt("%s (%d dBm)", WiFi.SSID(i).c_str(), WiFi.RSSI(i));
          int s = ibox.menu("WiFi Configuration", "Please select a WiFi network", &list);

          // user selected something?
          if (s > -1) {
            // yes, ask for WiFi password
            char psw[32] = "";
            if (ibox.textInput("WiFi Configuration", "Insert WiFi password", psw, 31, "Cancel", "OK", true) == InputResult::Enter) {
              // user pressed OK, connect to WiFi...
              preferences.putString("SSID", WiFi.SSID(s).c_str());
              preferences.putString("WiFiPsw", psw);
              connected = tryToConnect();
              // show to user the connection state
              if (connected)
                ibox.message("", "Connection succeeded!");
            } else
              break;
          } else
            break;
        } else {
          // there is no WiFi
          ibox.message("", "No WiFi network found!");
          break;
        }
        WiFi.scanDelete();

      } while (!connected);

    }

  }

  return connected;
}


void updateDateTime()
{
  // Set timezone
  setenv("TZ", "CET-1CEST,M3.5.0,M10.5.0/3", 1);
  tzset();

  if (checkWiFi()) {

    // we need time right now
    ibox.progressBox("", nullptr, true, 200, [&](fabgl::ProgressApp * app) {
      sntp_setoperatingmode(SNTP_OPMODE_POLL);
      sntp_setservername(0, (char*)"pool.ntp.org");
      sntp_init();
      for (int i = 0; i < 12 && sntp_get_sync_status() != SNTP_SYNC_STATUS_COMPLETED; ++i) {
        app->update(i * 100 / 12, "Getting date-time from SNTP...");
        delay(500);
      }
      sntp_stop();
    });

  } else {

    // set default time
    //printf("Setting default date/time\n");
    auto tm = (struct tm){ .tm_sec  = 0, .tm_min  = 0, .tm_hour = 8, .tm_mday = 14, .tm_mon  = 7, .tm_year = 84 };
    auto now = (timeval){ .tv_sec = mktime(&tm) };
    settimeofday(&now, nullptr);

  }
}


// download specified filename from URL
bool downloadURL(char const * URL, FILE * file)
{
  bool success = false;

  char const * filename = strrchr(URL, '/') + 1;

  ibox.progressBox("", "Abort", true, 380, [&](fabgl::ProgressApp * app) {
    app->update(0, "Preparing to download %s", filename);
    HTTPClient http;
    http.begin(URL);
    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
      if (file) {
        int tlen = http.getSize();
        int tlenK = tlen / 1024;
        int len = tlen;
        constexpr int BUFSIZE = 6000;
        uint8_t * buf = (uint8_t*) malloc(BUFSIZE);
        WiFiClient * stream = http.getStreamPtr();
        int dsize = 0;
        while (http.connected() && (len > 0 || len == -1)) {
          size_t size = stream->available();
          if (size) {
            int c = stream->readBytes(buf, imin(BUFSIZE, size));
            fwrite(buf, c, 1, file);
            dsize += c;
            if (len > 0)
              len -= c;
            if (!app->update(dsize / 1024 * 100 / tlenK, "Downloading %s (%.2f / %d MB)", filename, (double)dsize / 1048576.0, tlenK / 1024))
              break;
          }
        }
        free(buf);
        success = (len == 0 || (len == -1 && dsize > 0));
      }
    }
  });

  return success;
}



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

  disableCore0WDT();
  delay(100); // experienced crashes without this delay!
  disableCore1WDT();

  preferences.begin("PCEmulator", false);

  // uncomment to clear preferences
  //preferences.clear();

  ibox.begin(VGA_640x400_70Hz, 400, 300); // VGA_640x400_60Hz as alternative?
  ibox.setBackgroundColor(RGB888(0, 0, 0));

  // we need PSRAM for this app, but we will handle it manually, so please DO NOT enable PSRAM on your development env
  #ifdef BOARD_HAS_PSRAM
  ibox.message("Warning!", "Please disable PSRAM to improve performance!");
  #endif

  // note: we use just 2MB of PSRAM so the infamous PSRAM bug should not happen. But to avoid gcc compiler hack (-mfix-esp32-psram-cache-issue)
  // we enable PSRAM at runtime, otherwise the hack slows down CPU too much (PSRAM_HACK is no more required).
  if (esp_spiram_init() != ESP_OK)
    ibox.message("Error!", "This app requires a board with PSRAM!", nullptr, nullptr);

  #ifndef BOARD_HAS_PSRAM
  esp_spiram_init_cache();
  #endif

  if (!FileBrowser::mountSDCard(false, "/SD", 8))
    ibox.message("Error!", "This app requires a SD-CARD!", nullptr, nullptr);

  // uncomment to format SD!
  //FileBrowser::format(fabgl::DriveType::SDCard, 0);

  updateDateTime();

  // show a list of disks configurations
  StringList dconfs;
  for (int i = 0; i < sizeof(diskConfs) / sizeof(DiskConf); ++i)
    dconfs.append(diskConfs[i].desc);
  dconfs.select(preferences.getInt("dconf", 0), true);
  ibox.select("Disks Configurations", "Please select a disk configuration", &dconfs, nullptr, "OK", 8);
  int idx = imax(dconfs.getFirstSelected(), 0);
  preferences.putInt("dconf", idx);

  // load selected configuration
  FileBrowser fb;
  fb.setDirectory("/SD");
  bool disksExist = true;
  char const * filenameDiskA = nullptr;
  char const * filenameDiskC = nullptr;
  if (diskConfs[idx].diskA_URL) {
    filenameDiskA = strrchr(diskConfs[idx].diskA_URL, '/') + 1;
    disksExist = fb.exists(filenameDiskA, false);
    if (!disksExist) {
      // disk A doesn't exist, download
      auto file = fb.openFile(filenameDiskA, "wb");
      disksExist = downloadURL(diskConfs[idx].diskA_URL, file);
      fclose(file);
      if (!disksExist)
        fb.remove(filenameDiskA);
    }
  }
  if (diskConfs[idx].diskC_URL) {
    filenameDiskC = strrchr(diskConfs[idx].diskC_URL, '/') + 1;
    disksExist = disksExist && fb.exists(filenameDiskC, false);
    if (!disksExist) {
      // disk C doesn't exist, download
      auto file = fb.openFile(filenameDiskC, "wb");
      disksExist = downloadURL(diskConfs[idx].diskC_URL, file);
      fclose(file);
      if (!disksExist)
        fb.remove(filenameDiskC);
    }
  }

  if (!disksExist) {
    // unable to get disks
    ibox.message("Error!", "Unable to get system disks!");
    esp_restart();
  }

  ibox.end();


  machine = new Machine;
  machine->setDriveA(filenameDiskA);
  machine->setDriveC(filenameDiskC);
  machine->run();
}



#if FABGLIB_VGAXCONTROLLER_PERFORMANCE_CHECK
namespace fabgl {
  extern volatile uint64_t s_vgapalctrlcycles;
}
using fabgl::s_vgapalctrlcycles;
#endif



void loop()
{

#if FABGLIB_VGAXCONTROLLER_PERFORMANCE_CHECK
  static uint32_t tcpu = 0, s1 = 0, count = 0;
  tcpu = machine->ticksCounter();
  s_vgapalctrlcycles = 0;
  s1 = fabgl::getCycleCount();
  delay(1000);
  printf("%d\tCPU: %d", count, machine->ticksCounter() - tcpu);
  printf("   Graph: %lld / %d   (%d%%)\n", s_vgapalctrlcycles, fabgl::getCycleCount() - s1, (int)((double)s_vgapalctrlcycles/240000000*100));
  ++count;
#else

  vTaskDelete(NULL);

#endif
}

As the code for this example is quite big I will share a link to the exact example I am talking about to make this faster: https://github.com/fdivitto/FabGL/blob/master/examples/VGA/PCEmulator/PCEmulator.ino and here is a video that shows what the problem is from my side as I am using the FabGl example on the ESP-32-Wrover board: Example of the mouse not working
I have also connected the 120 ohm and 2k ohm resistors as seen in the schematic to pins 27 and 26 so I have also done that as well. I will also include a reference sheet to the Wrover module if that helps as well: esp32-wrover_datasheet_en.pdf (446.2 KB), Thank you to anyone who can help with this problem it will be most appreciated! :grinning: