DFPlayerMini music player volume display

outbackhut · July 22, 2022, 5:56am

I'm making a arduino music player using a 3.95" tft screen, a mega2560, and a DFPlayer mini.
The code I'm using works, but instead of only displaying 30 volume levels in Serial monitor, it displays 255. How do I fix that error?

[code]
#define BLACK 0x0000       /*   0,   0,   0 */
#define NAVY 0x000F        /*   0,   0, 128 */
#define DARKGREEN 0x03E0   /*   0, 128,   0 */
#define DARKCYAN 0x03EF    /*   0, 128, 128 */
#define MAROON 0x7800      /* 128,   0,   0 */
#define PURPLE 0x780F      /* 128,   0, 128 */
#define OLIVE 0x7BE0       /* 128, 128,   0 */
#define LIGHTGREY 0xC618   /* 192, 192, 192 */
#define DARKGREY 0x7BEF    /* 128, 128, 128 */
#define BLUE 0x001F        /*   0,   0, 255 */
#define GREEN 0x07E0       /*   0, 255,   0 */
#define CYAN 0x07FF        /*   0, 255, 255 */
#define RED 0xF800         /* 255,   0,   0 */
#define MAGENTA 0xF81F     /* 255,   0, 255 */
#define YELLOW 0xFFE0      /* 255, 255,   0 */
#define WHITE 0xFFFF       /* 255, 255, 255 */
#define ORANGE 0xFD20      /* 255, 165,   0 */
#define GREENYELLOW 0xAFE5 /* 173, 255,  47 */
#define PINK 0xF81F
#define MINT 0x8ff8
#define MINTBLUE 0x87ff

#include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
#include <EEPROM.h>
#include <Adafruit_GFX.h>
#include <MCUFRIEND_kbv.h>

MCUFRIEND_kbv tft;

#include <XPT2046_Touchscreen.h>           // Hardware SPI library
char *name = "Touch Shield";  //edit name of shield
const int TS_LANDSCAPE = 1; //XPT2046_TouchScreen.h
const int TS_LEFT = 261, TS_RT = 3770, TS_TOP = 3869, TS_BOT = 296;
#define XPT_CS  53      // MEGA2560 SHIELD 
#define XPT_IRQ 255     // XPT2046 library does not like IRQ
XPT2046_Touchscreen ts(XPT_CS, XPT_IRQ);

int pixel_x, pixel_y;     //Touch_getXY() updates global vars
bool Touch_getXY(void)
{
  bool pressed = ts.touched();
  if (pressed) {
    TS_Point p = ts.getPoint();
    if (TS_LANDSCAPE) mapxy(p.y, p.x);
    else mapxy(p.x, p.y);
  }
  return pressed;
}

void Touch_init(void)
{
  ts.begin();
}

void mapxy(int x, int y)                //maps ADC to pixel_x, pixel_y
{
  int aspect = tft.getRotation();     //LANDSCAPE
  int tft_width = tft.width();
  int tft_height = tft.height();
  switch (aspect & 3) {
    case 0:      //PORTRAIT
      pixel_x = map(x, TS_LEFT, TS_RT, 0, tft_width);
      pixel_y = map(y, TS_TOP, TS_BOT, 0, tft_height);
      break;
    case 1:      //LANDSCAPE
      pixel_x = map(y, TS_TOP, TS_BOT, 0, tft_width);
      pixel_y = map(x, TS_RT, TS_LEFT, 0, tft_height);
      break;
    case 2:      //PORTRAIT REV
      pixel_x = map(x, TS_RT, TS_LEFT, 0, tft_width);
      pixel_y = map(y, TS_BOT, TS_TOP, 0, tft_height);
      break;
    case 3:      //LANDSCAPE REV
      pixel_x = map(y, TS_BOT, TS_TOP, 0, tft_width);
      pixel_y = map(x, TS_LEFT, TS_RT, 0, tft_height);
      break;
  }
}

#define USE_TOUCH    0x2046

SoftwareSerial mySoftwareSerial(10, 11); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

Adafruit_GFX_Button pause_btn, play_btn, next_btn, prev_btn, up_btn, down_btn;

bool down;

uint8_t volume = 15;

uint8_t prevVol;

void setup()
{
  mySoftwareSerial.begin(9600);
  Serial.begin(9600);
  Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));

  if (!myDFPlayer.begin(mySoftwareSerial)) {  //Use softwareSerial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while (true);
  }
  Serial.println(F("DFPlayer Mini online."));
  myDFPlayer.EQ(DFPLAYER_EQ_NORMAL);
  myDFPlayer.outputDevice(DFPLAYER_DEVICE_SD);

  myDFPlayer.setTimeOut(500); //Set serial communictaion time out 500ms
  tft.begin(0x9488);
  Touch_init();
  tft.setRotation(1);
  tft.fillScreen(BLACK);
  myDFPlayer.volume(volume);  //Set volume value. From 0 to 30
  prevVol = volume;
  pause_btn.initButton(&tft,  200, 280, 80, 80, DARKCYAN, MINT, BLACK, "", 2);
  play_btn.initButton(&tft,  280, 280, 80, 80, DARKCYAN, MINT, BLACK, "", 2);
  next_btn.initButton(&tft,  360, 280, 80, 80, DARKCYAN, MINT, BLACK, ">", 2);
  prev_btn.initButton(&tft,  120, 280, 80, 80, DARKCYAN, MINT, BLACK, "<", 2);
  up_btn.initButton(&tft, 440, 280, 80, 80, DARKCYAN, MINT, BLACK, "^", 2);
  down_btn.initButton(&tft, 40, 280, 80, 80, DARKCYAN, MINT, BLACK, "^", 2);
  next_btn.drawButton(false);
  play_btn.drawButton(false);
  pause_btn.drawButton(false);
  prev_btn.drawButton(false);
  up_btn.drawButton(false);
  down_btn.drawButton(false);
  tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
  tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
  tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  tft.fillRect(10, 15, 18, 196, DARKGREY);
  myDFPlayer.play(1);
}

void loop(void)
{
  down = Touch_getXY();
  pause_btn.press(down && pause_btn.contains(pixel_x, pixel_y));
  play_btn.press(down && play_btn.contains(pixel_x, pixel_y));
  next_btn.press(down && next_btn.contains(pixel_x, pixel_y));
  prev_btn.press(down && prev_btn.contains(pixel_x, pixel_y));
  up_btn.press(down && up_btn.contains(pixel_x, pixel_y));
  down_btn.press(down && down_btn.contains(pixel_x, pixel_y));
  if (pause_btn.justReleased()) {
    pause_btn.drawButton(true);
    tft.fillRect(195, 271, 3, 18, WHITE); //pausebar1
    tft.fillRect(205, 271, 3, 18, WHITE); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  }
  if (pause_btn.justPressed())
  {
    pause_btn.drawButton(true);
    play_btn.drawButton(false);
    next_btn.drawButton(false);
    prev_btn.drawButton(false);
    up_btn.drawButton(false);
    down_btn.drawButton(false);
    myDFPlayer.pause();
  }
  if (play_btn.justReleased()) {
    play_btn.drawButton(true);
    tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
    tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, WHITE);
  }
  if (play_btn.justPressed())
  {
    pause_btn.drawButton(false);
    play_btn.drawButton(true);
    next_btn.drawButton(false);
    prev_btn.drawButton(false);
    up_btn.drawButton(false);
    down_btn.drawButton(false);
    myDFPlayer.start();
  }
  if (up_btn.justReleased()) {
    up_btn.drawButton();
    tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
    tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  }
  if (up_btn.justPressed())
  {
    pause_btn.drawButton(false);
    play_btn.drawButton(false);
    next_btn.drawButton(false);
    prev_btn.drawButton(false);
    up_btn.drawButton(true);
    down_btn.drawButton(false);
    myDFPlayer.volumeUp();
    volume ++;
  }
  if (down_btn.justReleased()) {
    down_btn.drawButton();
    tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
    tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  }
  if (down_btn.justPressed())
  {
    pause_btn.drawButton(false);
    play_btn.drawButton(false);
    next_btn.drawButton(false);
    prev_btn.drawButton(false);
    up_btn.drawButton(false);
    down_btn.drawButton(true);
    myDFPlayer.volumeDown();
    volume --;
  }
  if (next_btn.justReleased()) {
    next_btn.drawButton();
    tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
    tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  }
  if (next_btn.justPressed())
  {
    pause_btn.drawButton(false);
    play_btn.drawButton(false);
    next_btn.drawButton(true);
    prev_btn.drawButton(false);
    up_btn.drawButton(false);
    down_btn.drawButton(false);
    myDFPlayer.next();
  }
  if (prev_btn.justReleased()) {
    prev_btn.drawButton();
    tft.fillRect(195, 271, 3, 18, BLACK); //pausebar1
    tft.fillRect(205, 271, 3, 18, BLACK); //pausebar2
    tft.fillTriangle(288, 280, 273, 272, 273, 288, BLACK);
  }
  if (prev_btn.justPressed())
  {
    pause_btn.drawButton(false);
    play_btn.drawButton(false);
    next_btn.drawButton(false);
    prev_btn.drawButton(true);
    up_btn.drawButton(false);
    down_btn.drawButton(false);
    myDFPlayer.previous();
  }
  Volume();
}

void Volume() {
  //  if (volume = !prevVol) {
  //    prevVol = volume;
  Serial.println(volume);
  tft.fillRect(10, 15, 18, 196, DARKGREY);
  if (volume == 0) {
    tft.fillRect(16, 201, 6, 4, RED);
  }
  if (volume == 1) {
    tft.fillRect(16, 195, 6, 10, RED);
  }
  if (volume == 2) {
    tft.fillRect(16, 189, 6, 16, RED);
  }
  if (volume == 3) {
    tft.fillRect(16, 183, 6, 22, RED);
  }
  if (volume == 4) {
    tft.fillRect(16, 177, 6, 28, RED);
  }
  if (volume == 5) {
    tft.fillRect(16, 171, 6, 34, RED);
  }
  if (volume == 6) {
    tft.fillRect(16, 165, 6, 40, RED);
  }
  if (volume == 7) {
    tft.fillRect(16, 159, 6, 46, RED);
  }
  if (volume == 8) {
    tft.fillRect(16, 153, 6, 52, RED);
  }
  if (volume == 9) {
    tft.fillRect(16, 147, 6, 58, RED);
  }
  if (volume == 10) {
    tft.fillRect(16, 141, 6, 64, RED);
  }
  if (volume == 11) {
    tft.fillRect(16, 135, 6, 70, RED);
  }
  if (volume == 12) {
    tft.fillRect(16, 129, 6, 76, RED);
  }
  if (volume == 13) {
    tft.fillRect(16, 123, 6, 82, RED);
  }
  if (volume == 14) {
    tft.fillRect(16, 117, 6, 88, RED);
  }
  if (volume == 15) {
    tft.fillRect(16, 111, 6, 94, RED);
  }
  if (volume == 16) {
    tft.fillRect(16, 105, 6, 100, RED);
  }
  if (volume == 17) {
    tft.fillRect(16, 99, 6, 106, RED);
  }
  if (volume == 18) {
    tft.fillRect(16, 93, 6, 112, RED);
  }
  if (volume == 19) {
    tft.fillRect(16, 87, 6, 118, RED);
  }
  if (volume == 20) {
    tft.fillRect(16, 81, 6, 124, RED);
  }
  if (volume == 21) {
    tft.fillRect(16, 75, 6, 130, RED);
  }
  if (volume == 22) {
    tft.fillRect(16, 69, 6, 136, RED);
  }
  if (volume == 23) {
    tft.fillRect(16, 63, 6, 142, RED);
  }
  if (volume == 24) {
    tft.fillRect(16, 57, 6, 148, RED);
  }
  if (volume == 25) {
    tft.fillRect(16, 51, 6, 154, RED);
  }
  if (volume == 26) {
    tft.fillRect(16, 45, 6, 160, RED);
  }
  if (volume == 27) {
    tft.fillRect(16, 39, 6, 166, RED);
  }
  if (volume == 28) {
    tft.fillRect(16, 33, 6, 172, RED);
  }
  if (volume == 29) {
    tft.fillRect(16, 27, 6, 178, RED);
  }
  if (volume == 30) {
    tft.fillRect(16, 21, 6, 184, RED);
    //    }
  }
}
[/code]

markd833 · July 22, 2022, 6:32am

I'll hazard a guess that you don't limit the maximum value of volume. Your Volume() function suggests that the volume has 31 unique values (0-30), but your up button code allows the value of volume to increase beyond that limit.

outbackhut · July 22, 2022, 6:33am

@markd833
Yes, that is the exact issue. I just don't quite know HOW to limit the maximum value of volume.

UKHeliBob · July 22, 2022, 6:39am

volume++;
if (volume > 30)
{
  volume = 30;
}

outbackhut · July 22, 2022, 6:41am

@UKHeliBob
Still prints the volume as 255 if I press the volume button often enough.

markd833 · July 22, 2022, 7:05am

Where did you put the code that @UKHeliBob suggested? You may also experience issues with volume-- as well.

outbackhut · July 22, 2022, 7:36am

@markd833 @UKHeliBob
I have it working perfectly.
The only other question is how do I update the volume level on the tft only when it actually changes? At this point it is updating about a hundred times a second whether it is actually changing or not.

UKHeliBob · July 22, 2022, 10:51am

//code here to set or read volume
if (volume != previousVolume)
{
  //update the volume on screen
}
previousVolume = volume;

system · January 18, 2023, 10:52am

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DFPlayerMini music player volume display

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