The Virus TI2 desktop made me sell all my synths

thetechnobear · December 18, 2021, 11:39am

no, as I said, this is raw usb.
as I said, the TI starts up as a ‘vendor specific’ USB Device, so you have to talk to it as such, once you send these bytes… then it switches to be a usb midi device.

I can do better, I can point you to the axoloti code I wrote to do this

github.com

axoloti/axoloti/blob/46f6e4b383ce182da9dcca25b9d4b544fe20f990/firmware/usbh_vendor.c#L110


//                	USBH_UsrLog("USB Host (Virus) Output interval : %i", MIDI_Handle->write_poll);
//                    if(MIDI_Handle->write_poll<MIDI_MIN_WRITE_POLL) MIDI_Handle->write_poll = MIDI_MIN_WRITE_POLL;
                    MIDI_Handle->output_valid = true;
                }
                
            } // each endpoint, or until ive found both input and output endpoint
            if (isValidOutput(MIDI_Handle)) {
                USBH_UsrLog("USB Host (Virus) Output connected to %x : %x", interface, MIDI_Handle->OutEp );
                MIDI_Handle->OutPipe = USBH_AllocPipe(phost, MIDI_Handle->OutEp);
                USBH_OpenPipe  (phost,
                                MIDI_Handle->OutPipe,
                                MIDI_Handle->OutEp,
                                phost->device.address,
                                phost->device.speed,
                                USB_EP_TYPE_BULK,
                                MIDI_Handle->OutEpSize);
                USBH_LL_SetToggle  (phost, MIDI_Handle->OutPipe,0);

basically, its this :

   static uint8_t seq[] = { 0x4e, 0x73, 0x52, 0x01 }; 
   USBH_BulkSendData(phost, seq, sizeof(seq), MIDI_Handle->OutPipe,false);