Hello,
Im a mac user, so i can’t use the DLL’s that ships with the vm116 dmx usb box. Does anybody know how to send data to the box with serial data directly?
VM116/K8062 is recognized as an HID device.
You may use libusb to access it (old API used here)
- find the usb device with Vendor 0x10CF and Product 0x8062
- usb_open() it
- claim the device (usb_detach_kernel_driver_np(dev,0), usb_set_configuration(dev,1), usb_claim_interface(dev,0) )
- to transmit a DMX sequence (channels 1 to N), use the following packets :
4 i+1 D0 D1 D2 D3 D4 D5 ---- Start of DMX, begins with i channels set to 0 then channets set to D0…D5
then
2 D0 D1 D2 D3 D4 D5 D6 ---- Send channels set to D0…D6
3 D0 00 00 00 00 00 00 ---- Send 1 channel set to D0
5 i D0 D1 D2 D3 D4 D5 ---- Send i channels set to 0 then channels set to D0…D5
Do NOT send more than 512 channels.
To send the packets, use usb_interrupt_write(dev,1,(char *) data, 8, 20)
5) repeat step 4 at about every 25ms interval (which leaves time for the whole 512 channels to be transmitted)
6) at program end, release the device (usb_release_interface(dev,0) and usb_close() it.
The usb_detach_kernel_driver_np() call is Linux specific so you may have to skip it under MacOS or use some MAC-only way to disable the default driver.
I hope this will help you… This procedure should work on both Linux, *BSD and MacOSX.