Hello everybody,
I'm using an Attiny 1614 and an MP3-TF-16p (china DFPlayer) in a small Lasertag grenade that's supposed to play an explosion sound and then emit an IR signal. strangely the playing of the Audio only works twice. After that the MP3-TF-16p doesn't play a tune and the program gets stuck at the Player.play() command.
#define F_CPU 16000000L
#define DEBUG
#define TRACE
// #include <util/delay.h>
#include <Arduino.h>
#include <tinyNeoPixel.h>
#include <SoftwareSerial.h>
#include <DFRobotDFPlayerMini.h>
#define NEOPIXEL_PIN PIN_PB0
#define SOFTSERIAL_RX PIN_PA2
#define SOFTSERIAL_TX PIN_PA7
#define IR_RECEIVE_PIN PIN_PA6
#define IR_SEND_PIN PIN_PA4
#define BATTERY_MEASURE_PIN PIN_PA3
/*
+5V
|
-----------
| ATiny |
-----------
|
|
\
|
| --------------------> To Power Switch Pin (PIN_PA5)
/
|
|-
|
GND
*/
#define POWER_SWITCH_PIN PIN_PA5
#define BUTTON_PIN PIN_PB1
#define DFPLAYER_RX PIN_HWSERIAL0_RX
#define DFPLAYER_TX PIN_HWSERIAL0_TX
#define EXPLODE_SOUND 1
#define COUNTDOWN_SOUND 2
SoftwareSerial Serial1 = SoftwareSerial(SOFTSERIAL_RX, SOFTSERIAL_TX);
// Make sure to DEFINE IR related thinks *before* including IRremote.hpp
#define DECODE_MILESTAG2 // Enable only the MILESTAG 2 protocol to save memory
#define MARK_EXCESS_MICROS 20
#include <IRremote.hpp>
enum GrenadeState
{
WaitingForConnect,
WaitingForButtonPress,
Exploding
};
GrenadeState currentState = WaitingForButtonPress;
uint32_t countdownStart = 0;
const uint32_t countdownDuration = 3000; // 3 seconds countdown
// Team colors (0: red, 1: blue, 2: yellow, 3: green)
const uint32_t teamColors[] = {
0xFF0000, // red
0x0000FF, // blue
0xFFFF00, // yellow
0x00FF00 // green
};
uint8_t team = 0; // team of the tagger that connected
uint32_t storedData = 0; // the IR data received during waiting phase
uint8_t storedBits = 0; // number of bits of the stored signal
tinyNeoPixel pixels = tinyNeoPixel(2, NEOPIXEL_PIN, NEO_GRB);
DFRobotDFPlayerMini dfPlayer;
uint8_t fileToPlay = 0; // File that should be played by the DFPlayer ( 0 = no file, 1 = first file, 2 = second file , etc)
void triggerExplosion();
void setup()
{
// Softserial pins for debugging || Hardware serial for DFPlayer
pinMode(SOFTSERIAL_TX, OUTPUT);
pinMode(SOFTSERIAL_RX, INPUT);
// Pin for IR receiver
pinMode(IR_RECEIVE_PIN, INPUT_PULLUP);
pinMode(BUTTON_PIN, INPUT); // Pulled down externally
// Power for the grenade is turned on as long is this is high
pinMode(POWER_SWITCH_PIN, OUTPUT);
// Pin to meassure Battery
pinMode(BATTERY_MEASURE_PIN, INPUT);
// Turn on power at start so grenade stays turned on
digitalWrite(POWER_SWITCH_PIN, HIGH);
// Used for debugging
// Attiny has bug where you have to specify 80% of the baudrate: 115200 * 0.8 = 92160
Serial1.begin(92160);
Serial1.println("hello");
// Serial1.println("IR protocols:");
// printActiveIRProtocols(&Serial1);
Serial1.flush();
// Used for DFPlayer
////Attiny has bug where you have to specify 80% of the baudrate: 9600 * 0.8 = 7680
Serial.begin(7680);
dfPlayer.begin(Serial, true, false); // The MP3 tf 16P doen't support resting at start
dfPlayer.setTimeOut(500);
dfPlayer.volume(30); // Set volume to max
// dfPlayer.play(2); // Play the second sound on the SD card
// delay(2000); // GIve the Dfplayer some time to play the sound
pixels.begin();
pixels.setBrightness(127);
// use default color (blue) until connected
IrSender.begin();
IrReceiver.begin(IR_RECEIVE_PIN, DISABLE_LED_FEEDBACK);
disableLEDFeedback();
// dfPlayer.loop(2);
}
void loop()
{
if (currentState == WaitingForConnect) {
if ((millis() % 2000) < 20)
Serial1.println("Waiting for connect...");
// Stay in connect mode until an IR signal is received
if (IrReceiver.decode()) {
IRData receivedData = IrReceiver.decodedIRData;
if (receivedData.protocol == MILESTAG2) {
// Save the received data for later emission
storedData = receivedData.decodedRawData;
storedBits = receivedData.numberOfBits;
// Extract team color (team is stored in upper nibble of command)
team = (receivedData.command >> 4) & 0x0F;
// For safety, limit team to 0-3
if (team > 3)
team = 0;
// Display the team color on the LEDs
pixels.fill(teamColors[team]);
pixels.show();
Serial1.print("Connected; Team: ");
Serial1.println(team);
delay(400);
currentState = WaitingForButtonPress;
}
IrReceiver.resume();
}
IrReceiver.resume(); // Resume receiving IR signals
// If no IR signal is received, do some fancy LED animation
static uint16_t HSV_hue = 0; // Only assign once, because of 'static' keyword
HSV_hue += 10000; // Aggressive hue change to show that grenade is working
pixels.fill(pixels.ColorHSV(HSV_hue, 255, 255));
pixels.show();
// dfPlayer.play(1);
// delay(2000);
}
else if (currentState == WaitingForButtonPress) {
Serial1.println("Waiting for button press...");
// Wait here until the explode button is pressed
if (digitalRead(BUTTON_PIN) == HIGH) { // BUTTON_PIN is pulled down externally
// Button pressed, start countdown
countdownStart = millis();
currentState = Exploding;
fileToPlay = COUNTDOWN_SOUND;
// dfPlayer.play(2); // Play the second sound on the SD card
// delay(2000);
Serial1.println("Countdown started...");
}
// // Play sound for state indication
// dfPlayer.play(2); // Play the second sound on the SD card
// delay(2000);
}
else if (currentState == Exploding) {
// During countdown, if a new IR signal is received, override team and explode immediately.
if (IrReceiver.decode()) {
IRData receivedData = IrReceiver.decodedIRData;
if (receivedData.protocol == MILESTAG2) {
// Update team and stored data on hit
storedData = receivedData.decodedRawData;
storedBits = receivedData.numberOfBits;
team = (receivedData.command >> 4) & 0x0F;
if (team > 3)
team = 0;
pixels.fill(teamColors[team]);
pixels.show();
Serial1.println("Hit during countdown! Changing team & exploding instantly.");
triggerExplosion();
}
IrReceiver.resume();
}
else {
IrReceiver.resume();
// Check for countdown expiration.
if (millis() - countdownStart > countdownDuration) {
Serial1.println("Countdown finished. Exploding now.");
triggerExplosion();
}
}
}
if(fileToPlay != 0)
{
Serial1.println("playing audio");
if(!dfPlayer.waitAvailable(3000)){
Serial1.println("Dfplayer not available");
}
dfPlayer.play(fileToPlay);
fileToPlay = 0;
}
}
void triggerExplosion()
{
// Set an explosion effect on the LEDs
pixels.fill(); // Turn off all LEDs
pixels.show();
delay(200);
pixels.fill(0xFFFFFF); // Bright flash
pixels.show();
delay(200);
pixels.fill(); // Turn off all LEDs
pixels.show();
Serial1.println("playing explosion sound");
dfPlayer.reset();
// Serial1.println(dfPlayer.readState());
Serial1.flush();
// Play explosion sound
fileToPlay = EXPLODE_SOUND;
Serial1.println("playing audio finished");
Serial1.flush();
// Emit the stored IR signal (repeat count 0)
// IrSender.sendMilesTag2(storedData, storedBits, 1);
// Optionally print out explosion info and reset state:
Serial1.println("Boom! Grenade exploded.");
Serial1.flush();
// You might want to add a delay/reset process here.
currentState = WaitingForConnect;
}
The strange Baudrate is because ATtiny seems to calculate baudrates wrongly.
