John,
> The pi already has a serial port it's just at TTL levels instead of rs232
Wasn't one of the criticisms of the Model T that its serial port was TTL-level
(i.e. max 5 Volt) too ?
If that is correct - and please do correct me if I'm wrong - then what's the
problem ?
|\ _,,,--,,_
/ ,`.-'`' ._ \-;;,
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<---''(_/._)--'(_\_)
Jan Vanden Bossche @ work
From: M100 [mailto:[email protected]] On Behalf Of John R.
Hogerhuis
Sent: zaterdag 2 januari 2016 16:53
To: Model 100 Discussion
Subject: Re: [M100] Raspberry Pi as TPDD
Usually the first adapter shows up as /dev/ttyUSB0
If you have multiple you can have issues with which adapter is which name.
There's a way to create udev rules so the same name is always bound to the same
device.
Power cycles: I suggest getting ups pico board or just always keeping it
plugged in to something, could be a battery.
As to the board: not really smaller no. The pi already has a serial port it's
just at TTL levels instead of rs232. The board I've used is just a max232 chip
to do the level conversion. I guess if you built the chip into the cable it
could be smaller. Otherwise you're adding a daughter board. I prefer the USB
serial devices unless you're out if USB ports.
-- John.
On Saturday, January 2, 2016, Jan-80
<[email protected]<mailto:[email protected]>> wrote:
Hi,
2. LaddieAlpha on Mono were the the names I was looking for. If it works, I
don't care about name or environment. I was just pondering aternatives.
4. /dev/ttyS0 is the first USB-port, then? Or is it the USB-port + a
USB-2-serial adapter?
6. How do you manage power cycles?
5. If you build your own serial port, isn't that smaller?
-- Greetings from the TyRannoSaurus Jan-80
On Fri, 1 Jan 2016 17:22:11 -0500, Stephen Adolph wrote:
HI Jan,
I am currently running a raspberry pi with laddieAlpha, and it is working well.
Why do you want to use Desklink?
In my case, Laddiealpha is listening to a TCP port however, not serial.
Certainly it could use the /dev/ttyS0 port if you wanted to.
John H is the expert here.
..Steve
On Fri, Jan 1, 2016 at 10:46 AM, Jan-80
<[email protected]<javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote:
Hello,
A happy New Year 2016 to all of you.
I would like to use my old Raspberry Pi - an early Model B with only 256 MB RAM
- as a TPDD replacement. It would also allow anyone with any type of old
Raspberry Pi to do so. I am sure that, with the presentation of the Pi2, a lot
of hobbyists are going to sell their first-generation Pi's and they can be
picked up really cheap.
Software: there have been 2 ways reported on this list on getting a TPDD
emulator to work on the R.Pi. A third one was never mentioned, but might be
possible also. Correct me if I'm wrong
1. re-compiling Desklink from the original source for the Raspbian environment.
2. running the Windows.NET based version of Desklink in the .NET-compatible
environment of the R.Pi. (sorry, forgot the name)
3. is it possible to run a Desklink in DOS-emulated environment? (Just an idea
of mine...)
Hardware: come to think of it, some hardware stuff must also be considered.
4. Serial link simple: a USB-to-serial adapter does the trick. I have one, but
don't know if it will work. How do I test this?
5. Isn't it possible to use the I/O pins from the R.Pi as a serial port? Does
the TPDD need the control lines?
6. If you use the R.Pi as a TPDD, you're likely to turn it off an on as one.
But the R.Pi is a computer, and you could ruin the filesystem by doing so.
Isn't it better to use a hardware on/off button instead of simply pulling the
plug? Like this one:
http://www.raspberry-pi-geek.com/Archive/2013/01/Adding-an-On-Off-switch-to-your-Raspberry-Pi
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