USB Host Cable not reading MIDI

[pnduk]

Hi everyone,

I am trying to receive MIDI clock from my Elektron Digitakt via USB, but it cannot connect to my Teensy.

- I am using a Teensy 4.1/Audio shield rev D.
- I confirmed that the cable actually works with a simple HID mouse example.
- I am powering the Teensy via microUSB to my laptop.
- I have also tried the USBHost_t36 'InputFunctions.ino' example, but it had the same issue.

Is my Digitakt somehow at fault here? I've used it connected to my laptop via the same USB cable with no issues before.
My code only outputs 'midi: not connected, clk=0, running=0', no matter what MIDI info I send.

Thank you for the help, I am very new to this!

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
#include <USBHost_t36.h>
#include "SGTL5000.h"

AudioInputI2S            i2s1;
AudioOutputI2S           i2s2;
AudioConnection          patchCord1(i2s1, 0, i2s2, 0);
AudioConnection          patchCord2(i2s1, 1, i2s2, 1);
SGTL5000                 codec;

USBHost usb;
MIDIDevice midi(usb);

volatile uint32_t clkCount = 0;
volatile bool running = false;

void onClock() { clkCount++; }
void onStart() { running = true; }
void onStop() { running = false; }
void onContinue() { running = true; }

void setup() {
  Serial.begin(115200);

  AudioMemory(12);
  codec.enable();

  usb.begin();
  midi.setHandleClock(onClock);
  midi.setHandleStart(onStart);
  midi.setHandleStop(onStop);
  midi.setHandleContinue(onContinue);
}

uint32_t lastPrint = 0;

void loop() {
  usb.Task();
  midi.read();

  if (millis() - lastPrint > 500) {
    lastPrint = millis();
    Serial.printf("midi: %s, clk=%lu, running=%d\n",
    midi ? "connected" : "not connected",
    clkCount, running);
  }
}

 

[el_supremo]

When I've used midi over the usbhost, I have used code from the working examples which use

MIDIDevice midi1(usb);

for the device.
Try midi1, see if it helps.

Pete

 

[submo]

There's an option in the settings on the Digitakt to set it's USB out to Midi Only:

System>>USB config

You could try that if you haven't already. Think by default it's set to Audio/Midi