DFplayer Mini模块串口模式下条件语句中控制声音的播放与关闭
想通过Arduino Nano，基本某种限定条件下，控制MP3的播放与停止。我选择的是利用串口模式的控制。在此之前，测试了DFRobotDFPlayerMini库和DFPlayer_Mini_Mp3_by_Makuna库。这两个库都可以正常的控制指定MP3的播放与停止。但当我偿试加入条件语句进行判别并决定MP3的播放与停止时，我发现扬声器并不能够正确播放或停止音乐。感觉条件语句一直在被执行。现将基于DFPlayer_Mini_Mp3_by_Makuna库的代码发上来，请指教。include <VarSpeedServo.h>
#include <SoftwareSerial.h>
#include <DFMiniMp3.h>
class Mp3Notify
{
public:
static void PrintlnSourceAction(DfMp3_PlaySources source, const char* action)
{
if (source & DfMp3_PlaySources_Sd)
{
Serial.print("SD Card, ");
}
if (source & DfMp3_PlaySources_Usb)
{
Serial.print("USB Disk, ");
}
if (source & DfMp3_PlaySources_Flash)
{
Serial.print("Flash, ");
}
Serial.println(action);
}
static void OnError(uint16_t errorCode)
{
// see DfMp3_Error for code meaning
Serial.println();
Serial.print("Com Error ");
Serial.println(errorCode);
}
static void OnPlayFinished(DfMp3_PlaySources source, uint16_t track)
{
Serial.print("Play finished for #");
Serial.println(track);
}
static void OnPlaySourceOnline(DfMp3_PlaySources source)
{
PrintlnSourceAction(source, "online");
}
static void OnPlaySourceInserted(DfMp3_PlaySources source)
{
PrintlnSourceAction(source, "inserted");
}
static void OnPlaySourceRemoved(DfMp3_PlaySources source)
{
PrintlnSourceAction(source, "removed");
}
};
VarSpeedServo barrier_1;
VarSpeedServo barrier_2;
// I/O PINS
#define POWER_SERVO 4 //舵机供电控制引脚4，HIGH舵机可用，LOW舵机关闭
#define ALARM_1 2
#define ALARM_2 3
#define SENSOR_LEFT A0
#define SENSOR_RIGHT A1
int IRthreshold = 500;
unsigned int sen1_Val,sen2_Val;
bool trigger_s1 = false, trigger_s2 = false, latch_s1, latch_s2;
bool crossing_blocked;
static unsigned long millisPower;
bool alarmSignals, tick_blink;
SoftwareSerial secondarySerial(7, 8); // RX, TX
DFMiniMp3<SoftwareSerial, Mp3Notify> mp3(secondarySerial);
void setup()
{
//MP3 初始化
Serial.begin(115200);
Serial.println("initializing...");
mp3.begin();
uint16_t volume = mp3.getVolume();
Serial.print("volume ");
Serial.println(volume);
mp3.setVolume(24);
uint16_t count = mp3.getTotalTrackCount(DfMp3_PlaySource_Sd);
Serial.print("files ");
Serial.println(count);
Serial.println("starting...");
// Initialize Servos 舵机初始化
pinMode(LED_BUILTIN, OUTPUT);
pinMode(ALARM_1, OUTPUT);
pinMode(ALARM_2, OUTPUT);
pinMode(POWER_SERVO, OUTPUT);
pinMode(SENSOR_LEFT,INPUT_PULLUP);
pinMode(SENSOR_RIGHT,INPUT_PULLUP);
barrier_1.attach(5); //舵机控制引脚为5和6
barrier_2.attach(6);
/*栏杆初始动作-抬杆
舵机控制-“栏杆”动作说明：
barrier_X.write(XXX-运动角度,XX-(移动速度，值从低到高为0~255，程序设定速度为32)，bool值：Ture等待动作完成，false不等动作完成)
SERVO 1 (HOUSE) UP: 165 | DOWN: 25
SERVO 2 (CORNER) UP: 170 | DOWN: 35
Speed 0 or 255: maximum, 1-254 from lower to higher speed */
digitalWrite(POWER_SERVO, HIGH);
digitalWrite(LED_BUILTIN, HIGH);
delay(30);
barrier_1.write(180,32,false);
delay(30);
barrier_2.write(180,32,false);
millisPower = millis();
}
void loop()
{
mp3.loop();
delay(1);
if (analogRead(SENSOR_LEFT) <= IRthreshold) mp3.loopGlobalTrack(1);//这里，如果不加入条件语句，mp3.loopGlobalTrack(1)和mp3.stop()将被依次执行，而加入条件语句时，上述功能不能正常使用
else mp3.stop();
｝
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