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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat Dec 15, 2007 7:35 pm Post subject: OT RS-232 standard for DB-25 connector |
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I had to replace the blue tube (low emission) on my 4600HD. Now I have to redo the grayscale. This time I thought I'd hook up my test pattern generator to a unused input of my NEC ISS 6010 switcher which is two rooms away. The TPG has a DB-25 connector labled RS-232. I've never tried to control a device that has RS-232 on a DB-25 connector. Does anyone know if there is a standard pin-out for it? If I can figure this out, I can control it via my Crestron system and do it from the theater touch screen then eventually rack mount the TPG. Am I spoiled or what 
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sat Dec 15, 2007 7:45 pm Post subject: |
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DB-25 is the origional specification from yee olden days of the 1960's. Just google it, that'll give you the pin out. OR grab a couple of RS-232 9 pin to 25 pin cables. There's two major type's, regular modem cable and 'NULL' modem cable, aka serial printer cable.
That is if it's a standard RS-232 port.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat Dec 15, 2007 7:50 pm Post subject: |
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Ooooo, ya know what? I never throw away anything. I'll bet there's a serial printer cable out in the laboratory Igor
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Chip
A Barco is only a AmPro with training wheels
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Joust
Joined: 05 May 2006
Posts: 2429
Location: Almonte, Ontario, Canada
TV/Projector: Marquee 8501LC
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VideoGrabber
Joined: 09 Apr 2006
Posts: 933
Location: Michigan
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| Posted: Sun Dec 16, 2007 2:50 am Post subject: |
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Joust commented:
> ...it does have a misnomer on there for the 9pin connector. it is a DE9 NOT a DB9 <
Thanks, Barry! I've been using these for 30+ years, and never heard them referred to by their proper name. I've got DB9s, DB15s, DB37s, and a few other odd varieties here... none of which are actually DBs!
Amazing what you can learn from a comment here and a quick trip to wikipedia.  Though if you go shopping for any of these, you'll find them a lot faster by their incorrect-DB names.
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Joust
Joined: 05 May 2006
Posts: 2429
Location: Almonte, Ontario, Canada
TV/Projector: Marquee 8501LC
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| Posted: Sun Dec 16, 2007 3:10 am Post subject: |
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LOL yeah,
the misnomer has more or less become the defacto standard by the ignorant computer shop owner types.
I was using D-subminiature connectors before they came into vogue on the PC.
http://en.wikipedia.org/wiki/D-subminiature
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Dec 16, 2007 12:08 pm Post subject: |
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Isn't there a program in windows that allows you to send rs-232 protocol directly from the keyboard? I was sure there was but can't seem to find it.
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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Joust
Joined: 05 May 2006
Posts: 2429
Location: Almonte, Ontario, Canada
TV/Projector: Marquee 8501LC
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| Posted: Sun Dec 16, 2007 3:05 pm Post subject: |
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| stefuel wrote: | | Isn't there a program in windows that allows you to send rs-232 protocol directly from the keyboard? I was sure there was but can't seem to find it. |
hyperterminal does this. but it sends only characters. I imagine rs-232 control would require specific codes (protocol) to be sent.
If the projector is designed to use character strings then you could use a terminal emulator on the PC. you could use Macros to send specific codes.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Dec 16, 2007 5:09 pm Post subject: |
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I wasn't going to respond to this because I didn't think my blathering would
really matter but I had some extra time so I thought I would throw in my 2
cents.
Rs232 control can be used in 2 enviornments, dos or windows. (Dont want to
get into Mac or linux here). Now in a dos enviornment the code is sent
directly to the device as long as handshaking is available.When a key is
pushed it sends a binary code to the device. Example,if you press a ,on the
key board a hex value of 61 or 1100001 in binary is sent to the device.Now
its up to the device to determine what to do with it.I the device firmware
is written to take the code and execute power on, thats what it will do. If
the firmware is written to increase briteness then thats what it will do.
So the function of the device is dependant on how the firmware is written.The
keyboard will always send the same binary code unless another key is
pressed with it, such as shift a, which is the same as a capital A, then
the hex is 41 and the binary is 1000001.Therefore keyboard functions are
dependant on the devices firmware.
Now in a windows enviornment the software recieves the commands but can
execute them differently. Example would be if you pressed an A on the
keyboard the software could chose to pass through the binary code or change
the binary to say a T was pressed instead. Now the windows software sends a
command to the device, however it is still up to the device to determine
what to do with that code and what commands to execute. The firmware in the
device still determines the function.The Windows software may only have a
button to select that says power on, but selecting that button is mearly
sending a binary code of 1000001,(same as pressing a Capital A).So what that
means is Windows software must be written specifically for the device it is
controlling.If the device is RS232 controllable and you could get a copy of
the command codes, then you would know what function would be controlled by
which key was selected. I dont think there is a universal Windows software
because the firmware in the device determines what command to execute
depending on what code it recieves.
Well enough rambling, Probably doesn't really mean much to anybody. Just had
some time to waste.
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Joust
Joined: 05 May 2006
Posts: 2429
Location: Almonte, Ontario, Canada
TV/Projector: Marquee 8501LC
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| Posted: Sun Dec 16, 2007 5:18 pm Post subject: |
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thats what I said....
I disagree on the difference between Dos and Windows though. they act the same. Both can be made to translate codes.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Dec 16, 2007 5:23 pm Post subject: |
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| macgyver655 wrote: | I wasn't going to respond to this because I didn't think my blathering would
really matter but I had some extra time so I thought I would throw in my 2
cents.
Rs232 control can be used in 2 enviornments, dos or windows. (Dont want to
get into Mac or linux here). Now in a dos enviornment the code is sent
directly to the device as long as handshaking is available.When a key is
pushed it sends a binary code to the device. Example,if you press a ,on the
key board a hex value of 61 or 1100001 in binary is sent to the device.Now
its up to the device to determine what to do with it.I the device firmware
is written to take the code and execute power on, thats what it will do. If
the firmware is written to increase briteness then thats what it will do.
So the function of the device is dependant on how the firmware is written.The
keyboard will always send the same binary code unless another key is
pressed with it, such as shift a, which is the same as a capital A, then
the hex is 41 and the binary is 1000001.Therefore keyboard functions are
dependant on the devices firmware.
Now in a windows enviornment the software recieves the commands but can
execute them differently. Example would be if you pressed an A on the
keyboard the software could chose to pass through the binary code or change
the binary to say a T was pressed instead. Now the windows software sends a
command to the device, however it is still up to the device to determine
what to do with that code and what commands to execute. The firmware in the
device still determines the function.The Windows software may only have a
button to select that says power on, but selecting that button is mearly
sending a binary code of 1000001,(same as pressing a Capital A).So what that
means is Windows software must be written specifically for the device it is
controlling.If the device is RS232 controllable and you could get a copy of
the command codes, then you would know what function would be controlled by
which key was selected. I dont think there is a universal Windows software
because the firmware in the device determines what command to execute
depending on what code it recieves.
Well enough rambling, Probably doesn't really mean much to anybody. Just had
some time to waste. |
The device I'm attempting to control is a Team Systems Digital video generator. I don't have the protocol as of yet but from what you say, I assume trial and error will prove some results. As the funtions are activated a led next to the button lights up. So I guess I can, could figure it out. I'm hoping the number funtions will be the same 1-1 2-2. time will tell.
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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