Lpc2000

With the rising interest in Forth, we have decided to make a 
demo system for Philips LPC2xxx CPUs. I had a couple of hours 
spare today, so a first cut is now available. You need 64k 
Flash, 16k RAM and a 10, 12, or 14.7 MHz crystal and a terminal 
emulator at 115200 baud. The distribution includes multitasking, 
floating point and a manual!

http://www.mpeforth.com/arena/lpcforth.zip

Please let me have some feedback, and when it's been tested on 
more LPC flavours, I'll put it in the files section.

Stephen
--
Stephen Pelc, stephen@...
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeforth.com - free VFX Forth downloads

----- Original Message ----- 

From: "Stephen Pelc" <stephen@...>
To: <lpc2000@yahoogroups.com>; <armForth@yahoogroups.com>
Sent: Tuesday, March 28, 2006 4:31 PM
Subject: [lpc2000] Free Forth for LPC2xxx


> With the rising interest in Forth, we have decided to make a
> demo system for Philips LPC2xxx CPUs. I had a couple of hours
> spare today, so a first cut is now available. You need 64k
> Flash, 16k RAM and a 10, 12, or 14.7 MHz crystal and a terminal
> emulator at 115200 baud. The distribution includes multitasking,
> floating point and a manual!
>
> http://www.mpeforth.com/arena/lpcforth.zip
>
> Please let me have some feedback, and when it's been tested on
> more LPC flavours, I'll put it in the files section.

Thanks, Stephen. I just tried it on an old LPC2104 board of mine and it 
worked OK - added a couple of integers and gave the correct answer.

Leon
--
Leon Heller, G1HSM
leon.heller@...
http://www.geocities.com/leon_heller

--- In lpc2000@yahoogroups.com, "Stephen Pelc" <stephen@...> wrote:
>
> With the rising interest in Forth, we have decided to make a 
> demo system for Philips LPC2xxx CPUs. I had a couple of hours 
> spare today, so a first cut is now available. You need 64k 
> Flash, 16k RAM and a 10, 12, or 14.7 MHz crystal and a terminal 
> emulator at 115200 baud. The distribution includes multitasking, 
> floating point and a manual!
> 
> http://www.mpeforth.com/arena/lpcforth.zip
> 
> Please let me have some feedback, and when it's been tested on 
> more LPC flavours, I'll put it in the files section.
> 
> Stephen
> --
> Stephen Pelc, stephen@...
> MicroProcessor Engineering Ltd - More Real, Less Time
> 133 Hill Lane, Southampton SO15 5AF, England
> tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
> web: http://www.mpeforth.com - free VFX Forth downloads
>

Running on Olimex LPC2106 Prototyping Board
http://www.sparkfun.com/commerce/product_info.php?products_id=269

Next step Olimex LPC2106 Header Board
http://www.sparkfun.com/commerce/product_info.php?products_id=263

Plus a couple of intermediate steps: learn Forth and come up with an
application.

Very interesting...

Richard

--- In lpc2000@yahoogroups.com, "Stephen Pelc" <stephen@...> wrote:
>
> With the rising interest in Forth, we have decided to make a 
> demo system for Philips LPC2xxx CPUs. I had a couple of hours 
> spare today, so a first cut is now available. You need 64k 
> Flash, 16k RAM and a 10, 12, or 14.7 MHz crystal and a terminal 
> emulator at 115200 baud. The distribution includes multitasking, 
> floating point and a manual!
> 
> http://www.mpeforth.com/arena/lpcforth.zip
> 
> Please let me have some feedback, and when it's been tested on 
> more LPC flavours, I'll put it in the files section.
> 
> Stephen
> --
> Stephen Pelc, stephen@...
> MicroProcessor Engineering Ltd - More Real, Less Time
> 133 Hill Lane, Southampton SO15 5AF, England
> tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
> web: http://www.mpeforth.com - free VFX Forth downloads
>

Is floating point actually included?  The example in section 13.7 of
the manual comes back as undefined:

1.234 FCONSTANT CON1 is undefined
1.234 FCONSTANT CON1
     ^

Direct evaluation of integers works:
1 2 + . 3  ok

No so with floating point:
1.1 2.2 + . is undefined
1.1 2.2 + .
   ^

But, then, I have been working with Forth for about 5 minutes...

Richard

   ^

Hi, 


> Is floating point actually included?  The example in section 
> 13.7 of the manual comes back as undefined:
> 
> 1.234 FCONSTANT CON1 is undefined
> 1.234 FCONSTANT CON1
>      ^
> 
> Direct evaluation of integers works:
> 1 2 + . 3  ok
> 
> No so with floating point:
> 1.1 2.2 + . is undefined
> 1.1 2.2 + .
>    ^
> 
> But, then, I have been working with Forth for about 5 minutes...

I think 1.1 is a double constant (2 cells on the stack) and would be
added with D+ (IIRC).

To add floats I believe you need F+ and to print them F.

Regards,

-- Paul.

--- In lpc2000@yahoogroups.com, "Paul Curtis" <plc@...> wrote:
>
> Hi, 
> 
> 
> > Is floating point actually included?  The example in section 
> > 13.7 of the manual comes back as undefined:
> > 
> > 1.234 FCONSTANT CON1 is undefined
> > 1.234 FCONSTANT CON1
> >      ^
> > 
> > Direct evaluation of integers works:
> > 1 2 + . 3  ok
> > 
> > No so with floating point:
> > 1.1 2.2 + . is undefined
> > 1.1 2.2 + .
> >    ^
> > 
> > But, then, I have been working with Forth for about 5 minutes...
> 
> I think 1.1 is a double constant (2 cells on the stack) and would be
> added with D+ (IIRC).
> 
> To add floats I believe you need F+ and to print them F.
> 
> Regards,
> 
> -- Paul.
>

It seems to me that it doesn't parse the input for the first constant
much less get to the point of doing the addition.  So, I ordered a
couple of books...  I have been using Alibris to find and purchase
used books.  FWIW, I am very happy with their service - a distributed
seller network.

Richard

>    From: "rtstofer" <rstofer@...>
> Is floating point actually included?  The example in section 13.7 of
> the manual comes back as undefined:
> 
> 1.234 FCONSTANT CON1 is undefined
> 1.234 FCONSTANT CON1
>      ^

Two things:
1) bug, fixed, new version going up in ten minutes!
2) The format of floats requires numbers like
  1.234e0 
and you need F+ to add and F. to display. I've amended the 
documentation as well.

If you need books there are free books on Forth at
  http://www.mpeforth.com/books.htm

Stephen
--
Stephen Pelc, stephen@...
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeforth.com - free VFX Forth downloads

>    From: "rtstofer" <rstofer@...>

Forgot:
3) You must use REALS to enable floating point.

Which leads to:
a) I really must read our manuals more thoroughly, even though 
they are derived from the source code itself.
b) I get more of a kick working on tons of machinery than in 
dealing with floating point.

Stephen
--
Stephen Pelc, stephen@...
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeforth.com - free VFX Forth downloads

--- In lpc2000@yahoogroups.com, "Stephen Pelc" <stephen@...> wrote:
>
> >    From: "rtstofer" <rstofer@...>
> 
> Forgot:
> 3) You must use REALS to enable floating point.
> 
> Which leads to:
> a) I really must read our manuals more thoroughly, even though 
> they are derived from the source code itself.
> b) I get more of a kick working on tons of machinery than in 
> dealing with floating point.
> 
> Stephen
> --
> Stephen Pelc, stephen@...
> MicroProcessor Engineering Ltd - More Real, Less Time
> 133 Hill Lane, Southampton SO15 5AF, England
> tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
> web: http://www.mpeforth.com - free VFX Forth downloads
>

In the early days of Bill Gates' Basic (and many other varieties,
before and after) it was common to use the interpreter as a command
line calculator.  Lacking any real experience with Forth, trying the
floating point multiply was the only thing I could come up with.

I have installed the updated version and started through the online
book: Starting Forth.  So far, so good.

Thanks
Richard

--- In lpc2000@yahoogroups.com, "Stephen Pelc" <stephen@...> wrote:
>
> With the rising interest in Forth, we have decided to make a 
> demo system for Philips LPC2xxx CPUs.
...
> http://www.mpeforth.com/arena/lpcforth.zip

Wow, your documentation is the best I've seen for any Forth system.

I'm sorry that I don't have time to try it now, but judging from the
manual I'm sure it's great!

You've even got floating point routines...

Eric

>    From: "Eric Engler" <englere.geo@...>

> > http://www.mpeforth.com/arena/lpcforth.zip
> 
> Wow, your documentation is the best I've seen for any Forth system.

Blush! Thanks. For the last five or six years we've done all our 
new manuals using a literate programming system called DocGen. 
All documentation  be put in the source files themselves. DocGen 
is part of VFX Forth for Windows. It's similar in some ways to 
Doxygen, but more designed from the perspective that it *must* 
be easy to use otherwise programmers won't bother. The lcc 
sources convinced us of that! 

One major benefit of this is that generating new manuals for 
different implementations is little more than writing Forth 
scripts naming a set a files. All the documentation is inherited 
from the source files themselves.

Another major benefit is that because it is easy to write 
formatted manuals, programmers adapt their work pattern and 
write the documentation as they go. This in turn leads to 
improved code quality in our experience.

As you can gather, I'm a fan of literate programming systems.

Stephen
--
Stephen Pelc, stephen@...
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeforth.com - free VFX Forth downloads