Re: How connect PC Embedded to MDB (Vending Machine)
- From: Paul Keinanen <keinanen@xxxxxx>
- Date: Mon, 29 Sep 2008 23:07:25 +0300
On Mon, 29 Sep 2008 11:32:31 +1000, "PhilW" <phil@xxxxxxxxxxxxx>
wrote:
<juanma.freelance@xxxxxxxxx> wrote in message
news:c4d5b1b0-ea81-446b-ba2a-4f7ebe2811c3@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi!
I'm sorry but I am not English and I speack English very bad.
My question is: How connect a PC Embedded to Vending Machine? I know
that exist a protocol MDB that is used by vending machine, but this
conector is different to pc conector (RS232, USB, i2c, etc). Can I
connect a PC Embedded by MDB? How?
Anybody understand me?
Thanks you!
We understand you.
Read the spec to understand what is required to connect.
However, even once you have done the hardware to be able to connect to a
PC's RS232 port you will, more than likely run into the problem of the 9bit
char format not being supported on a std PC serial port.
This is the tricky part.
Unless you are prepared to do very low level coding, the only thing I
have found so far is some ethernet to 9bit serial converters done by
Port Box in Prague.
You can fudge it using the mark/space parity control but it is not very
nice.
This is OK for slow speeds and as long as you are able to disable the
interrupts.
Paul
.
- References:
- How connect PC Embedded to MDB (Vending Machine)
- From: juanma . freelance
- Re: How connect PC Embedded to MDB (Vending Machine)
- From: PhilW
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