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[讨论] DFPlayer板后面工作的蓝灯没有亮问题出在哪以及如何解决 |
我用DFPlayer mini mp3模块,利用三个按键做下一首上一首和暂停/播放的效果,线路检查了好几遍,代码也正常,喇叭焊接也是成功的,但是按下按键没有声音,我发现DFPlayer板后面工作的蓝灯没有亮问题出在哪呢,以及怎么解决呀,求求大家帮帮忙,另外附上代码 #include "SoftwareSerial.h" SoftwareSerial mySerial(10, 11); # define Start_Byte 0x7E # define Version_Byte 0xFF # define Command_Length 0x06 # define End_Byte 0xEF # define Acknowledge 0x00 //Returns info with command 0x41 [0x01: info, 0x00: no info] # define ACTIVATED LOW int buttonNext = 2; int buttonPause = 3; int buttonPrevious = 4; boolean isPlaying = false; void setup () { pinMode(buttonPause, INPUT); digitalWrite(buttonPause,HIGH); pinMode(buttonNext, INPUT); digitalWrite(buttonNext,HIGH); pinMode(buttonPrevious, INPUT); digitalWrite(buttonPrevious,HIGH); mySerial.begin (9600); delay(1000); playFirst(); isPlaying = true; } void loop () { if (digitalRead(buttonPause) == ACTIVATED) { if(isPlaying) { pause(); isPlaying = false; }else { isPlaying = true; play(); } } if (digitalRead(buttonNext) == ACTIVATED) { if(isPlaying) { playNext(); } } if (digitalRead(buttonPrevious) == ACTIVATED) { if(isPlaying) { playPrevious(); } } } void playFirst() { execute_CMD(0x3F, 0, 0); delay(500); setVolume(20); delay(500); execute_CMD(0x11,0,1); delay(500); } void pause() { execute_CMD(0x0E,0,0); delay(500); } void play() { execute_CMD(0x0D,0,1); delay(500); } void playNext() { execute_CMD(0x01,0,1); delay(500); } void playPrevious() { execute_CMD(0x02,0,1); delay(500); } void setVolume(int volume) { execute_CMD(0x06, 0, volume); // Set the volume (0x00~0x30) delay(2000); } void execute_CMD(byte CMD, byte Par1, byte Par2) // Excecute the command and parameters { // Calculate the checksum (2 bytes) word checksum = -(Version_Byte + Command_Length + CMD + Acknowledge + Par1 + Par2); // Build the command line byte Command_line[10] = { Start_Byte, Version_Byte, Command_Length, CMD, Acknowledge, Par1, Par2, highByte(checksum), lowByte(checksum), End_Byte}; //Send the command line to the module for (byte k=0; k<10; k++) { mySerial.write( Command_line[k]); } } |
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