Analog joystick values

Projects Programming
1

Hello, and good afternoon. I'm about to wrap up the conversion of all my game pads and flightsticks to Bluetooth after solving many of my own issues I am on one last problem.

My problem is the joystick readings for them all. everything is wired and hooked up correctly as in Arduino IDE I can watch the values go up and down from 0 to 941 for both X and Y in the serial monitor but when I go over to Windows test panel and move the joystick in the up position slowly the number value goes all the way up to 127 then atad further is -127 bringing the joystick marker to the bottom of the test plane and if I continue to move the joystick up it goes all the way up from -127 and past 0 then 127 again. It does this in every single direction and all my sensors (hall effect/analog sticks)

Few things to know My old projects used Promicros (ATmega32U4)
For Bluetooth and ease of installing. I got boards that are the same size with the same pin out but use the nRF52840 ProMicro nrf52840's.

Video Of Issue here

CODE

#include <Adafruit_TinyUSB.h>

/*********************************************************************
     Single Handed Gamepad, 15 Buttons, 1 Joystick
 ********************************************************************/


#include <bluefruit.h>



BLEDis bledis;
BLEHidGamepad blegamepad;

// define each function and its input pin number comments describe physical switches
#define X_PIN A2    //JOY x
#define Y_PIN A1    //JOY y

int8_t x = X_PIN;
int8_t y = Y_PIN;

hid_gamepad_report_t gp;

void setup()
{

// LOW POWER MODE!
  // Pins default to INPUT mode. To save power, turn them all to OUTPUT
  // initially, so only those being used will be turn on. See:
  // http://www.pjrc.com/teensy/low_power.html

  Serial.begin(115200);



#if CFG_DEBUG
  // Blocking wait for connection when debug mode is enabled via IDE
  while ( !Serial ) delay(10);
#endif

  Serial.println("ChazronBLE");
  Serial.println("------------------------------------\n");
  Serial.println("FileName: Chazron.ino");
  Serial.println();
  Serial.println("Go to your devices's Bluetooth settings to pair your device");
  Serial.println("then open an application that accepts gamepad input");

  Bluefruit.begin();
  Bluefruit.setTxPower(4);    // Check bluefruit.h for supported values
  Bluefruit.setName("Chazron");
  // Configure and Start Device Information Service
  bledis.setManufacturer("InMyRoom Productions");
  bledis.setModel("Chucke Ergo - nRF52840");
  bledis.begin();

  /* Start BLE HID
   * Note: Apple requires BLE device must have min connection interval >= 20m
   * ( The smaller the connection interval the faster we could send data).
   * However for HID and MIDI device, Apple could accept min connection interval 
   * up to 11.25 ms. Therefore BLEHidAdafruit::begin() will try to set the min and max
   * connection interval to 11.25  ms and 15 ms respectively for best performance.
   */
  blegamepad.begin();

  /* Set connection interval (min, max) to your perferred value.
   * Note: It is already set by BLEHidAdafruit::begin() to 11.25ms - 15ms
   * min = 9*1.25=11.25 ms, max = 12*1.25= 15 ms
   */
  /* Bluefruit.Periph.setConnInterval(9, 12); */

  // Set up and start advertising
  startAdv();

}

void startAdv(void)
{
  // Advertising packet
  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
  Bluefruit.Advertising.addTxPower();
  Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_HID_GAMEPAD);

  // Include BLE HID service
  Bluefruit.Advertising.addService(blegamepad);

  // There is enough room for the dev name in the advertising packet
  Bluefruit.Advertising.addName();

  /* Start Advertising
   * - Enable auto advertising if disconnected
   * - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
   * - Timeout for fast mode is 30 seconds
   * - Start(timeout) with timeout = 0 will advertise forever (until connected)
   *
   * For recommended advertising interval
   * https://developer.apple.com/library/content/qa/qa1931/_index.html
   */
  Bluefruit.Advertising.restartOnDisconnect(true);
  Bluefruit.Advertising.setInterval(32, 244);    // in unit of 0.625 ms
  Bluefruit.Advertising.setFastTimeout(30);      // number of seconds in fast mode
  Bluefruit.Advertising.start(0);                // 0 = Don't stop advertising after n seconds
}

void loop()
{
  // nothing to do if not connected or
  if ( !Bluefruit.connected() ) return;

    int val = analogRead(A2); 
    int val2 = analogRead(A1);
  
    
 
    gp.x = analogRead(x);
    gp.y = analogRead(y); 


 
    Serial.print("X: ");
    Serial.println(val);
    Serial.print("Y: ");
    Serial.println(val2);
    //delay(500);
       blegamepad.report(&gp);
}
2

I think the problem is in data type of gp.x and gp.y

2 Likes
3

The range of possible values for int8_t variables is -128 to 127.

Use int16_t (two bytes) for values in the range -32768 to 32767.

2 Likes
4

I had thought that originally but yields the same results.

I did some reading about mapping the values.

map(value, fromLow, fromHigh, toLow, toHigh)

Using the serial monitor to get actual values and using those values to get the values that I actually want but when I input it in my code the joystick no longer reads anything at all. I will include code with map added maybe im just putting it in wrong.


#include <Adafruit_TinyUSB.h>

/*********************************************************************
    Single Handed Gamepad, 15 Buttons, 1 Joystick
********************************************************************/


#include <bluefruit.h>



BLEDis bledis;
BLEHidGamepad blegamepad;

// define each function and its input pin number comments describe physical switches
#define X_PIN A2    //JOY Y
#define Y_PIN A1      //JOY X

int16_t x = X_PIN;
int16_t y = Y_PIN;

hid_gamepad_report_t gp;

void setup()
{

// LOW POWER MODE!
 // Pins default to INPUT mode. To save power, turn them all to OUTPUT
 // initially, so only those being used will be turn on. See:
 // http://www.pjrc.com/teensy/low_power.html

 Serial.begin(115200);



#if CFG_DEBUG
 // Blocking wait for connection when debug mode is enabled via IDE
 while ( !Serial ) delay(10);
#endif

 Serial.println("ChazronBLE");
 Serial.println("------------------------------------\n");
 Serial.println("FileName: Chazron.ino");
 Serial.println();
 Serial.println("Go to your devices's Bluetooth settings to pair your device");
 Serial.println("then open an application that accepts gamepad input");

 Bluefruit.begin();
 Bluefruit.setTxPower(4);    // Check bluefruit.h for supported values
 Bluefruit.setName("Chazron");
 // Configure and Start Device Information Service
 bledis.setManufacturer("InMyRoom Productions");
 bledis.setModel("Chucke Ergo - nRF52840");
 bledis.begin();

 /* Start BLE HID
  * Note: Apple requires BLE device must have min connection interval >= 20m
  * ( The smaller the connection interval the faster we could send data).
  * However for HID and MIDI device, Apple could accept min connection interval 
  * up to 11.25 ms. Therefore BLEHidAdafruit::begin() will try to set the min and max
  * connection interval to 11.25  ms and 15 ms respectively for best performance.
  */
 blegamepad.begin();

 /* Set connection interval (min, max) to your perferred value.
  * Note: It is already set by BLEHidAdafruit::begin() to 11.25ms - 15ms
  * min = 9*1.25=11.25 ms, max = 12*1.25= 15 ms
  */
 /* Bluefruit.Periph.setConnInterval(9, 12); */

 // Set up and start advertising
 startAdv();

}

void startAdv(void)
{
 // Advertising packet
 Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
 Bluefruit.Advertising.addTxPower();
 Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_HID_GAMEPAD);

 // Include BLE HID service
 Bluefruit.Advertising.addService(blegamepad);

 // There is enough room for the dev name in the advertising packet
 Bluefruit.Advertising.addName();

 /* Start Advertising
  * - Enable auto advertising if disconnected
  * - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
  * - Timeout for fast mode is 30 seconds
  * - Start(timeout) with timeout = 0 will advertise forever (until connected)
  *
  * For recommended advertising interval
  * https://developer.apple.com/library/content/qa/qa1931/_index.html
  */
 Bluefruit.Advertising.restartOnDisconnect(true);
 Bluefruit.Advertising.setInterval(32, 244);    // in unit of 0.625 ms
 Bluefruit.Advertising.setFastTimeout(30);      // number of seconds in fast mode
 Bluefruit.Advertising.start(0);                // 0 = Don't stop advertising after n seconds
}

void loop()
{
 // nothing to do if not connected or
 if ( !Bluefruit.connected() ) return;

   int val = analogRead(A2); 
   int val2 = analogRead(A1);
   x = map(X_PIN, 0, 1024, -32768, 32768);
   y = map(Y_PIN, 0, 1024, -32768, 32768);
   


   gp.x = analogRead(x);
   gp.y = analogRead(y); 



   Serial.print("X: ");
   Serial.println(val);
   Serial.print("Y: ");
   Serial.println(val2);
   //delay(500);
      blegamepad.report(&gp);
     
}
5

I'm seeing that. Been a real headache. I'm a fool and didn't realize how different these boards really are. They may have the same size and pin out but the chips differ and I have only dealt with promicros with ATmega32u4 so this is different or I'm just so lost I don't know what I'm doing anymore.

I have 11 different 3d printed gamepads/flightsticks many are yearsss old and I've gone through many wires and boards due to wear and tear, damage, neglect, cats...... Wireless is needed haha.

6

figured it out using

  analogReadResolution(6);

in beginning of loop

     analogReadResolution(6);
     gp.x = analogRead(X_PIN);
     gp.y = analogRead(Y_PIN);

for some reason no other bitrate works with this board without extreme overshooting.

thank you all for your help.

7

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