Casio CZ/ VZ/ FZ - Pro Series

That send/ack problem is what has stalled my communication with the fz1 which is a nightmare message-wise.


Sent from my iPhone

On 29 Apr 2016, at 17:08, "Gordonjcp gordon@... [CZsynth]" <CZsynth@yahoogroups.com> wrote:

> On Fri, Apr 29, 2016 at 06:02:55AM -0700, smw-mail@... [CZsynth] wrote:
> > Just a couple of thoughts: (1) Would you consider a tablet (such as an android device) with an app that can do sysex via Wi-Fi? (2) Would you consider building your own sysex sending controller with a low-cost micro processor, say something like a arduino or a pi--or maybe modifying/adding on to something like an old ART? foot controller? (3) I recall reading about one (other that the BCF/BCR 2000s), but will have to look for the reference--I think I might know someone with a programmable foot pedal. 
> > Steve
> > 
> 
> One of the difficulties with USB interfaces and the CZ family is that they expect to send and receive acknowledgement messages to and from the host device when doing sysex transfers, and these don't line up with multiples of three bytes. Because of the way the USB protocol works, most devices seem to want to use this three byte mode for sysex although some allegedly have a byte-at-a-time mode. Mostly you can't send "byte-at-a-time" messages which is what you need.
> 
> I've had an inkling to do an STM32-based interface that will get around this and other usb-midi issues. I've got loads of STM32F107 boards that have USB interfaces and the rest is just two transistors and an optoisolator.
> 
> -- 
> Gordonjcp MM0YEQ
>