Reduce all DIO interrupt handling to single ISR/task pair
E (62201) bus_lock: spi_bus_lock_acquire_end(701): Cannot release a lock that hasn't been acquired.
Can be trigger by triggering receive just before a send
E (62201) bus_lock: spi_bus_lock_acquire_end(701): Cannot release a lock that hasn't been acquired.
Guru Meditation Error: Core 0 panic'ed (IntegerDivideByZero). Exception was unhandled.
Update README to reflect new device config
Figure out audio board
Settled on DFPlayerMini with SD card. This eliminates the USB connector. Tracks are played in order they are written to the card.
This issue can closed once a basic driver (#3) is in place.