为什么我的音频声音无法在我的 Arduino 代码中播放，但如果我单独播放它，它开始工作正常

Question

我正在尝试设置计时器，之后音频将自动播放一次，但它不会播放任何东西，只是噪音，但是当我单独运行音频程序时，它工作得很好

这是我的代码，请帮助我找出我做错的地方。

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <SD.h>
#include <TMRpcm.h>
#include <SPI.h>
int timer1_counter;
#define SD_ChipSelectPin 4
TMRpcm tmrpcm;
unsigned long time_now = 0;
LiquidCrystal_I2C lcd(0x27, 16, 2);
const byte ledPin = 13;
const byte interruptPin1 = 2;
const byte interruptPin2 = 3;
int counter2 = 0;
volatile byte state = LOW;
int count = 0;
int limit = 0;
bool TimerFlag = false;
int deviceTime = 0;
int set = 5;
bool soundplayflag = false;
void setup() 
{
lcd.begin();
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
pinMode(interruptPin1, INPUT_PULLUP);
pinMode(interruptPin2, INPUT_PULLUP);
pinMode(set, INPUT_PULLUP);
lcd.backlight();
lcd.setCursor(1,0);
lcd.print("Please Select:");
noInterrupts();           // disable all interrupts
TCCR1A = 0;
TCCR1B = 0;
TCNT1  = 0;
OCR1A = 31250;            // compare match register 16MHz/256/2Hz
TCCR1B |= (1 << WGM12);   // CTC mode
TCCR1B |= (1 << CS12);    // 256 prescaler 
TIMSK1 |= (1 << OCIE1A);  // enable timer compare interrupt
interrupts();             // enable all interrupts
// initialize timer1 
}
ISR(TIMER1_COMPA_vect)          // timer compare interrupt service routine
{
if (soundplayflag == true)
{
counter2 = counter2+1;
Serial.println(counter2/2);
}
}
void loop() 
{
//unsigned long currentMillis = millis();
int up = digitalRead(interruptPin1);
int down = digitalRead(interruptPin2);
int setbutton = digitalRead(set);
delay(230);
if (up == 0)
{
Serial.println("Entering up");
count++;
if (count >= 0) {
lcdprint(count);    
}
}
else if (down == 0)
{
Serial.println("Entering down");
count--;
if (count >= 0) {
lcdprint(count);
}
}
else if (setbutton == 0)
{
Serial.println("Entering set");
soundplayflag=true;
deviceTime = count;
}
if (deviceTime > 0)
{
if (deviceTime == counter2)
{
soundplayflag=false;
Serial.println("Hello world");
PlaySound();
counter2 = 0;
}
}
}
int lcdprint(int a)
{
lcd.clear();
lcd.setCursor(1,0);
lcd.print("Please Select:");
lcd.setCursor (7,1);
lcd.print(a);
Serial.println(a);
lcd.setCursor (10,1);
lcd.print("Min");
}// end of lcdprint(int a)

void PlaySound()
{
for (int i = 0; i < 10; i++)
{
tmrpcm.setVolume(5);
tmrpcm.play("3.wav");
delay(1000);
}// end of for loop
}// end of void PlaySound()

我的预期输出是它应该在我设置时间时播放声音

Answer 1

TMRpcm 似乎使用 Timer1，这与您的TIMER1_COMPA_vect冲突。这可以解释为什么如果你不运行任何其他东西，它就会起作用。

也许尝试使用#define USE_TIMER2？