I am attempting to use an esp8266 to play an .mp3 audio file through a connected speaker using the 'ESP8266Audio' library.
I have tested that the hardware setup is correct (e.g. I have been able to play sounds from the speaker using a simple tone() function). I have also tested that the filesystem image is correctly built and uploaded because I have been able to list the files in the directory and read from simple text files that I have placed there.
Why is my code unable to process/play the audio file?
Here is my code:
#include <Arduino.h>
#include <LittleFS.h>
#include <AudioFileSourceLittleFS.h>
#include <AudioGeneratorMP3.h>
#include <AudioOutputI2SNoDAC.h>
AudioGeneratorMP3 *mp3;
AudioFileSourceLittleFS *file;
AudioOutputI2SNoDAC *out;
void setup() {
Serial.begin(9600);
if (!LittleFS.begin()) {
Serial.println("LittleFS initialization failed!");
return;
} else {
Serial.println("LittleFS initialisation successful");
}
file = new AudioFileSourceLittleFS("/feet.mp3");
if (!file->isOpen()) {
Serial.println("Failed to open file.");
return;
} else {
Serial.println("File opened successfully.");
}
out = new AudioOutputI2SNoDAC();
out->SetOversampling(200);
out->SetGain(2.0);
mp3 = new AudioGeneratorMP3();
if (mp3->begin(file, out)) {
Serial.println("MP3 begin successful");
} else {
Serial.println("MP3 begin failed");
}
}
void loop() {
if (mp3->isRunning()) {
if (!mp3->loop()) {
Serial.println("MP3 loop failed");
mp3->stop();
} else {
Serial.print("Free heap during loop: ");
Serial.println(ESP.getFreeHeap());
}
} else {
Serial.println("MP3 done");
delay(1000);
}
}
The results of the exception decoder is:
Exception (3):
epc1=0x402046ae epc2=0x00000000 epc3=0x00000000 excvaddr=0x40249b36 depc=0x00000000
LoadStoreError: Processor internal physical address or data error during load or store
epc1=0x402046ae in mad_layer_III at ??:?
excvaddr=0x40249b36 in system_get_sdk_version at ??:?
>>>stack>>>
ctx: cont
sp: 3ffffb40 end: 3fffffd0 offset: 0150
3ffffc90: 00000000 00000000 00000000 006f0000
3ffffca0: 00000000 00000000 0000f884 00000000
3ffffcb0: 00000000 00000000 00000000 00000000
3ffffcc0: 00000000 00000030 00000008 3ffe8368
3ffffcd0: 4025dd3f 3ffe8368 40219f3c 00000004
3ffffce0: 00000000 0000000a 3ffffd53 00000000
3ffffcf0: 000000b0 00000000 3ffffd53 4025e128
3ffffd00: 4025e129 3ffe8368 3ffffdc0 02b2a450
3ffffd10: 009200c0 01000000 00ff050f 24070000
3ffffd20: 00000004 00000039 fe302064 3ffef64c
3ffffd30: 00100408 3ffef9c0 00100408 00000000
3ffffd40: 00000000 00000000 0000001f 341002a8
3ffffd50: 00353930 400042db 3fffc228 40105af5
3ffffd60: 40004b31 3ffefa14 00000000 003435c0
3ffffd70: 3ffffe90 3ffffe80 00000014 4000050c
3ffffd80: 3ffffe90 ffffff9d ffffff9d ffffff9d
3ffffd90: ffffff9d ffffff9d ffffff9d ffffff9d
3ffffda0: ffffff9d ffffff9d ffffff9d ffffff9d
3ffffdb0: ffffff9d ffffff9d ffffff9d ffffff9d
3ffffdc0: ffffff9d ffffff9d ffffff9d ffffff9d
3ffffdd0: ffffff9d ffffff9d ffffff9d 3ffe85e0
3ffffde0: 00000080 0000270f 00000000 00000030
3ffffdf0: 402079a8 00000030 00000008 ffffffff
3ffffe00: 402079a8 3fff12eb 3ffefa30 00000001
3ffffe10: 40100175 00000096 3ffefa30 00000001
3ffffe20: 4000050c 40100138 3fffc270 4000050c
3ffffe30: 40100175 00000080 3fff0374 402174cd
3ffffe40: 3ffffe90 3ffffe80 0000000c 4000050c
3ffffe50: 4020b8f8 00000030 00000008 ffffffff
3ffffe60: 3fff0d04 00080010 40252660 40217540
3ffffe70: 3fff536c 3fff5c6c 3fff0d01 00080010
3ffffe80: ffffffe8 14000000 04000000 3ffffc90
3ffffe90: 40252664 3ffffd88 00000000 00000001
3ffffea0: 00000000 3fff1d3c 00000002 3ffffc90
3ffffeb0: 00000000 00000000 3ffffe68 3fff536c
3ffffec0: 00000000 00000000 000002b2 3fff12f4
3ffffed0: 3fff1cf4 74612027 00000001 40251be4
3ffffee0: 74657366 3ffffc90 00000054 00000000
3ffffef0: 000000ab 3fff1324 00000057 00000057
3fffff00: 00000054 000000ab 00000004 3fff5c6c
3fffff10: 3fff1d3c 00000002 3fffff6c 3fff12f4
3fffff20: 00000001 3fff1d3c 3fff1310 4020158f
3fffff30: 3fff12ec 00000000 6f726863 617a696e
3fffff40: 3fff12ec 00000001 3fff0374 00000000
3fffff50: 3fff1cf4 3fff12f4 3fff1d3c 402016b8
3fffff60: 0000270f 3fff0374 00000000 4020db7c
3fffff70: 0000270f 3fff0384 3fff0374 4020d004
3fffff80: 0000270f 3fff0384 3fff0374 4020d161
3fffff90: 4020f19c 3ffe8b88 3ffee8fc 3ffeea6c
3fffffa0: 3fffdad0 3ffee8bc 3ffee8fc 4020c34f
3fffffb0: 3fffdad0 00000000 3ffeea40 402107bc
3fffffc0: feefeffe feefeffe 3fffdab0 40100f11
<<<stack<<<
0x4025dd3f in etharp_output at ??:?
0x40219f3c in __ssputs_r at /workdir/repo/newlib/newlib/libc/stdio/nano-vfprintf.c:179
0x4025e128 in etharp_output at ??:?
0x4025e129 in etharp_output at ??:?
0x40105af5 in ets_timer_disarm at ??:?
0x402079a8 in lfs_bd_read at lfs.c:?
0x402079a8 in lfs_bd_read at lfs.c:?
0x40100175 in i2s_slc_isr at core_esp8266_i2s.cpp:?
0x40100138 in i2s_slc_isr at core_esp8266_i2s.cpp:?
0x40100175 in i2s_slc_isr at core_esp8266_i2s.cpp:?
0x402174cd in vsnprintf at /workdir/repo/newlib/newlib/libc/stdio/vsnprintf.c:41
0x4020b8f8 in lfs_file_read at ??:?
0x40252660 in system_get_sdk_version at ??:?
0x40217540 in snprintf_P at /workdir/repo/newlib/newlib/libc/sys/xtensa/stdio_pgmspace.c:33
0x40252664 in system_get_sdk_version at ??:?
0x40251be4 in system_get_sdk_version at ??:?
0x4020158f in mad_header_decode at ??:?
0x402016b8 in mad_frame_decode at ??:?
0x4020db7c in littlefs_impl::LittleFSFileImpl::read(unsigned char*, unsigned int) at ??:?
0x4020d004 in AudioGeneratorMP3::DecodeNextFrame() at ??:?
0x4020d161 in AudioGeneratorMP3::loop() at ??:?
0x4020f19c in HardwareSerial::write(unsigned char const*, unsigned int) at ??:?
0x4020c34f in loop at ??:?
0x402107bc in loop_wrapper() at core_esp8266_main.cpp:?
0x40100f11 in cont_wrapper at ??:?
As an newbie to this world, any help would be greatly appreciated!
