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From: juanma.freelance on 5 Oct 2008 12:10
On 2 oct, 00:30, "PhilW" <p...(a)microcoin.com> wrote:
> Hi Juan,
>
> Yes it is possible, but everything I mentioned previously remains the same.
>
> To be honest we have not looked at Section 8, we are mainly involved in
> coin/note validation. However, nothing else changes. The device you want to
> build is still just a device that must meet the standard MDB interface
> specification.
>
> Connection to the MDB bus for you as a device is much simpler than that of a
> host. You can get away with a couple of opto couplers, just like in the
> sample schematic in that section 4. You would be for eg slave 1.
>
> PhilW

PhilW, Have you anyone schematic to make a adapter MDB to RS232 or any
pc port (usb, rj45, etc...)??

Thanks you!

Juan.
From: juanma.freelance on 7 Oct 2008 20:29
On 5 oct, 18:10, juanma.freela...(a)gmail.com wrote:
> On 2 oct, 00:30, "PhilW" <p...(a)microcoin.com> wrote:
>
> > Hi Juan,
>
> > Yes it is possible, but everything I mentioned previously remains the same.
>
> > To be honest we have not looked at Section 8, we are mainly involved in
> > coin/note validation. However, nothing else changes. The device you want to
> > build is still just a device that must meet the standard MDB interface
> > specification.
>
> > Connection to the MDB bus for you as a device is much simpler than that of a
> > host. You can get away with a couple of opto couplers, just like in the
> > sample schematic in that section 4. You would be for eg slave 1.
>
> > PhilW
>
> PhilW, Have you anyone schematic to make a adapter MDB to RS232 or any
> pc port (usb, rj45, etc...)??
>
> Thanks you!
>
> Juan.

Anybody Can answer me?
From: Wlad on 8 Oct 2008 11:12

But.. have you considered using the Executive Protocol ?
Of course, it depends on the function you have to implement, anyway it
is less difficult,
even if it isn't possible to connect directly the PC seria port with
the vending machine.

Talking about mdb I've found only the PC2MDB product, but I haven't
used it.
Let us know if you try it..

From: Jeff Jonas on 30 Oct 2008 04:07
>> However, some of the USB serial chips may be flexible enough to
>> implement a 9-bit mode without resorting the parity trick.
>> Alternatively, some of the USB-capable microcontrollers certainly are.

>I'm not aware of any USB chips that support full 9 bit mode ...
>Even though some USB-capable chips are able to support 9bit serial,
>supporting it through the USB is another question.

I'm unsure if there are affordable off-the-shelf
USB to 9 bit adapters
(Black Box probably has an adapter for $$$).

Atmel AVR and Microchip PIC chips (such as the PIC18F14K50, PIC18F66J50
as featured in the October 2008 Circuit Cellar magazine)
have 9 bit UARTS and USB 2.0 on chip, but require your own programming.
Manufacturer's Application Notes and user support might give you all
the building blocks, perhaps entire programs to handle the problem.
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