func midi_init() error {
var ctx libusb.Context
err := libusb.Init(&ctx)
if err != nil {
return err
}
defer libusb.Exit(ctx)
list, err := libusb.Get_Device_List(ctx)
if err != nil {
return err
}
defer libusb.Free_Device_List(list, 1)
for _, dev := range list {
dd, err := libusb.Get_Device_Descriptor(dev)
if err != nil {
return err
}
if dd.IdVendor == usb_vid && dd.IdProduct == usb_pid {
fmt.Printf("found\n")
break
}
}
return nil
}
func OpenDpf() (*DPF, error) {
vid := uint16(AX206_VID)
pid := uint16(AX206_PID)
dpf := new(DPF)
err := libusb.Init(&dpf.ctx)
if err != nil {
return nil, err
}
dpf.hasCtx = true
dpf.udev = libusb.Open_Device_With_VID_PID(dpf.ctx, vid, pid)
if dpf.udev == nil {
return nil, fmt.Errorf("Failed to open device [%04x:%04x] (may be no permission?)", vid, pid)
}
dpf.hasUdev = true
libusb.Set_Auto_Detach_Kernel_Driver(dpf.udev, true)
if err = libusb.Claim_Interface(dpf.udev, AX206_INTERFACE); err != nil {
return nil, fmt.Errorf("Can't claim interface: %v", err)
}
dpf.hasClaim = true
return dpf, nil
}