[Lcdproc] serialPOS driver

[Eric Pooch]

Ethan,
see below:
On Feb 4, 2007, at 10:47 AM, Ethan Dicks wrote:


> On 2/4/07, Eric Pooch <epooch@cox.net> wrote:
>
>> driver and docbook for text based serial Point of Sale displays.
>> Currently only supports the AEDEX protocol, but can be extended to
>> use other text-based POS emulation protocols.
>>
>
> Thanks, Eric.  I have a couple flavors of 2x20 VFD Pole Displays.  One
> is a deluxe model and supports one line of scrolling text (you prefix
> the string with ^E, IIRC, and the display itself shifts the
> characters).
>
> Do you have a pointer to the AEDEX protocol somewhere, or is it so
> simple that it's documented in the comments in the driver?
>
here is a pdf explaining several protocols including AEDEX:
http://jb-sys.com/downloads/posPeripherals/disp20x2_spec.pdf

there is an enum in the code I submitted that explains each of the  
AEDEX commands.

AEDEX includes scrolling too, but I could not figure out how lcdproc  
deals with hardware scrolling, so I disabled it.


>
>
>> These can be picked up cheap on ebay if you look around.  They also
>> usually come with full rs232 support and a power adapter.
>>
>
> The ones I have contain TTL serial modules (typically at 4800 bps or
> 9600 bps) and a simple resistor/diode level shifter (plus a 7805) on a
> daughter card.
>


> All of mine have DIN-6 connectors.  Somewhere I have a
> commercial DIN-6 to DB25 + 2.5mm power jack, but it's pretty easy to
> trace out the leads and manufacture a replacement adapter.  What I
> should _really_ do is to modify the pole or the base to have a 2.5mm
> jack for a power adapter, plus an RJ45 for Cisco-compatible serial (I
> always save old Cisco cables and adapters from the trash when they
> pitch out "install kits" at work).
>


Mine is an Emax that uses a driverless (not parallel or TTL and no  
text driver ) Samsung VFD.  I forget the exact model number, but it  
took me a while to realize that there is no hardware text driver on  
the VFD.  It has pins for each scan line and one for the scan rate,  
power, etc.  It then has a large board from the POS manufacturer that  
does all of the rs232, text and controls the VFD. The  VFD could not  
be used alone.  It has standard db9 cables (one for pass through to a  
printer) and a standard power jack and ac adapter.
Because the VFD could not be used without additional hardware, I  
figured it was easier to just write the new driver.


> Thanks again for doing this.  I'll see about hooking up one of my
> displays and making any necessary changes.
>

Let me know if I can do anything to continue to help.


>
> -ethan
> _______________________________________________
> LCDproc mailing list
> LCDproc@lists.omnipotent.net
> http://lists.omnipotent.net/mailman/listinfo/lcdproc
>