Possible Code Modifications for Adafruit_VS1053 Files

[Warren52]

• Arduino board: Adafruit VS1053B (https://www.adafruit.com/product/1381)
• Arduino IDE version: 1.8.19
• Code modifications by whh - Feb 2024
• I was looking for an audio board to work with an AVR128DB28 MCU running
• under Spence Konde's DxCore (https://github.com/SpenceKonde/DxCore) with
• IR Remote support via TinyIRReceiver (Arduino-IRremote) as the basis for
• my next projects. I looked over the Adafruit VS1053B (product 1381), the
• various documentation Adafruit provided, how to hook it up, evaluated my
• MCU, etc., and chose to give it a try.
• I ended up downloading the Adafruit_VS1053.h and .cpp files from github,
• found I also needed the Adafruit_SPIDevice.h and .cpp files, put the files
• into my local directory (and modified includes to access the local files,
• and tried to get things working. EVENTUALLY - I starting hearing audio
• out of an Adafruit 3.7W amp to a set of speakers. But I could never get
• a full file to play.
• I went through the VS1053 code to understand what was going on and put
• debug prints here and there. I found the interrupts were happening quite
• rapidly and feedBuffer_noLock could take 16 ms or more. But everything I
• tried never allowed me to have audio and IR Remote working together. So
• I chose a different approach.
• I made an exec() function pattered after the interrupt handler that would
• call a runBuffer() function pattered after feedBuffer_noLock. The exec()
• function would be called in void loop() of an .ino sketch and defines in
• Adafruit_VS1053.h file would separate interrupt code from exec code. I had
• wanted to put the define just before the include in the .ino file but it
• would not pass through and be recognized in the Adafruit_VS1053.h header.
• So long story short, using the exec() function, I can play mp3 audio files
• from the SD Card while at the same time processing IR Remote signals via
• IRRemote TinyIRReceiver. I can start a specific audio file (e.g. buttons
• 1 thru 9), change the volume up or down, mute or unmute the volume, or
• stop playing WITHOUT any interruption or degradation in playback. All
• while only clocking my MCU at 8 MHz. (Oh yea, I also have a fair amount
• of debug content being output while all of this is going on!)
• I have gone back and tried the interrupt method but even with setting
• the MCU clock to the highest frequency of 24 MHz, it will not finish
• playing a mp3 file. I even changed the attachInterrupt parameter from
• CHANGE to RISING. The only way I can get all I want running to run is
• to use the exec() function.
• Ok, so what am I doing. I am giving back to Adafruit. Comments have
• been added to the Adafruit_VS1053.h and .cpp files I have been working
• on. I have also tried to put my initials (e.g. whh) where I have made
• changes. I hope I can zip these files up and submit them to github so
• you can look them over and choose to do what you would like to with
• the code. Maybe one day there is a new code version with instructions
• of how to use either interrupts or the exec() function. Worst go to
• worst, I now have working code for me. Now as soon as more VS1053
• boards become available, I will be able to use them.
• Warren H. Holt (whh) - 17feb2024

Adafruit_VS1053_Mods_Feb_2024.zip