No serial output from EZ_USB_MIDI_HOST_PIO_example.ino

[HanYangZhao]

Hi there,

Thanks for your hard work. I tried running EZ_USB_MIDI_HOST_PIO_example.ino with a RP2040 Adafruit USB host board and a normal Pico Board but I'm unable to get any serial logs, not even Serial.println("EZ USB MIDI HOST PIO Example for Arduino\r\n");. The LED blinks fine. Weirdly enough I tried running usb_midi_host_pio_example.ino from the usb_midi_host library which does have serial output but does not respond when I plug in a MIDI keyboard. This has been kinda frustrating as I've gotten usb_midi_host_pio_example.ino to work before a couple of weeks ago, but I have update some of the dependencies libraries which seems to have broken it. Hope you can give me some advice!

My settings are as follow

I did try various level of debug but didn't see any difference

Multiple libraries were found for "Adafruit_TinyUSB.h"
 Used: C:\Users\han\Documents\Arduino\libraries\Adafruit_TinyUSB_Library
 Not used: C:\Users\han\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\3.9.0\libraries\Adafruit_TinyUSB_Arduino
Using library Pico_PIO_USB at version 0.6.0 in folder: C:\Users\han\Documents\Arduino\libraries\Pico_PIO_USB 
Using library EZ_USB_MIDI_HOST at version 2.0.0 in folder: C:\Users\han\Documents\Arduino\libraries\EZ_USB_MIDI_HOST 
Using library MIDI_Library at version 5.0.2 in folder: C:\Users\han\Documents\Arduino\libraries\MIDI_Library 
Using library Adafruit_TinyUSB_Library at version 3.3.0 in folder: C:\Users\han\Documents\Arduino\libraries\Adafruit_TinyUSB_Library 
Using library SPI at version 1.0 in folder: C:\Users\han\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\3.9.0\libraries\SPI 
Using library usb_midi_host at version 1.1.1 in folder: C:\Users\han\Documents\Arduino\libraries\usb_midi_host 

[HanYangZhao]

I'm pretty sure it's due to this bug sekigon-gonnoc/Pico-PIO-USB#122. Downgrading to an earlier version fixed the issue