Re: What is greenarrays up to lately?

From	rickman <gnuarm@gmail.com>
Newsgroups	comp.lang.forth
Subject	Re: What is greenarrays up to lately?
Date	2015-03-20 00:12 -0400
Organization	A noiseless patient Spider
Message-ID	<meg6ma$nv9$1@dont-email.me> (permalink)
References	<ae798c14-c5a2-4b38-bb15-63cd45f530e6@googlegroups.com> <42d25675-3529-4aa7-8ff9-08f4ad256cef@googlegroups.com> <20150316194214.6ff8abb8@T60A> <mea2ks$n57$2@dont-email.me> <20150319112440.0e202ee8@T60A>

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On 3/19/2015 7:24 AM, Jan Coombs <Jan-54 wrote:
> On Tue, 17 Mar 2015 16:26:53 -0400
> rickman <gnuarm@gmail.com> wrote:
>
>> On 3/16/2015 3:42 PM, Jan Coombs <Jan-54 wrote:
>>   >
>>   > It's a bit more exciting if the simulation can export
>>   > the design to the FPGA tools, then you are closer to
>>   > having a chip.
>>
>> I'm not sure what that means.  What design?  The chip or the code?
>
> Both.  The simulator consumes the source code for the
> hardware design.  One file of which contains a simulation
> model for the target processor code ROM, and also FPGA
> chip family dependant code to initialize a matching RAM
> block on the chip.

This is not clear to me at all.


>> I'm
>> not sure why the simulator is the right tool to be producing code.  The
>> simulator is used to run the code you have produced.
>
> It is right because the development is test driven,
> and good because the edit-test loop is very short.
>
>
> In more detail:
>
> For each new feature a test is added to the test suite.
> Once a processor has grown to a certain size this might
> just mean adding a new target code fragment.
>
> The simulator [1] is used to perform a suite of tests
> to indicate that the last development step is not yet
> achieved, also, that achieving it has not broken the
> hardware design elsewhere.
>
> During a test run the simulator also exports Verilog
> and/or VHDL files for the chip tools.  This adds
> confidence that the hardware source is valid.
>
> By occasionally running the FPGA tools it can be seen
> that the code is still synthesizable, and that chip
> dependent features are catered for, for example, RAM
> initialisation to hold the target code.
>
> That's why I feel "closer to having a chip"
>
> Test driven development for hardware is still new to
> me; I understand the theory, but still fiddle... :)
>
> [1] http://www.myhdl.org/start/why.html

You are talking about code describing the operation of the chip, not a 
simulator to test your software.  If you were designing a chip you would 
use an HDL like Verilog, VHDL or one of the others.  Otherwise you would 
be writing a whole lot more than just the code for the chip, you would 
be writing the simulator and synthesis engine too.

I can't say I follow what you are trying to say really.  You seem to be 
saying you would run a simulation on your code which is the test suite 
to test the HDL?  I think that would be most easily done in the HDL 
simulator, no?  That is what I did when I designed a CPU.  So in that 
sense I was *always* running the FPGA tools.

What tools are you talking about exactly?

-- 

Rick

Thread

What is greenarrays up to lately? polymorph self <jackvanc3@gmail.com> - 2015-03-11 21:54 -0700
  Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-15 14:08 -0700
    Re: What is greenarrays up to lately? hughaguilar96@gmail.com - 2015-03-15 19:10 -0700
      Re: What is greenarrays up to lately? polymorph self <jackvanc3@gmail.com> - 2015-03-16 21:58 -0700
        Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-17 12:19 -0700
          Re: What is greenarrays up to lately? Jason Damisch <jasondamisch@yahoo.com> - 2015-03-17 13:24 -0700
    Re: What is greenarrays up to lately? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-03-16 18:03 +0000
    Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-03-16 19:42 +0000
      Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-17 16:26 -0400
        Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-03-19 11:24 +0000
          Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 00:12 -0400
            Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-03-21 23:03 +0000
              Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-21 21:14 -0400
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-22 00:38 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-22 18:35 -0400
                Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-22 16:18 -0700
                Re: What is greenarrays up to lately? Bernd Paysan <bernd.paysan@gmx.de> - 2015-03-23 01:06 +0100
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-22 22:20 -0400
                Re: What is greenarrays up to lately? Jason Damisch <jasondamisch@yahoo.com> - 2015-03-23 08:02 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-23 16:13 -0400
                Offer + Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-04-08 09:51 +0100
                Re: Offer + Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-04-10 00:47 -0400
    Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-17 16:24 -0400
      Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-17 13:57 -0700
        Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-17 14:36 -0700
          Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-17 16:36 -0700
            Re: What is greenarrays up to lately? Dennis Ruffer <daruffer@gmail.com> - 2015-03-18 07:00 -0700
            Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-18 15:54 -0700
              Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-18 19:27 -0400
              Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-18 16:44 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-18 20:24 -0400
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-19 07:22 -0700
                Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-03-19 22:20 +0000
                Re: What is greenarrays up to lately? Bernd Paysan <bernd.paysan@gmx.de> - 2015-03-20 00:14 +0100
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-20 08:24 -0700
                Re: What is greenarrays up to lately? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-03-20 15:30 +0000
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-20 08:49 -0700
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-20 09:04 -0700
                Re: What is greenarrays up to lately? Bernd Paysan <bernd.paysan@gmx.de> - 2015-03-20 20:32 +0100
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 12:31 -0400
                Re: What is greenarrays up to lately? Bernd Paysan <bernd.paysan@gmx.de> - 2015-03-20 19:44 +0100
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-20 08:20 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 00:22 -0400
                Re: What is greenarrays up to lately? Mark Wills <markwills1970@gmail.com> - 2015-03-20 03:07 -0700
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-20 08:41 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 12:49 -0400
                Re: What is greenarrays up to lately? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-03-21 13:29 +0000
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 12:43 -0400
                Re: What is greenarrays up to lately? Jason Damisch <jasondamisch@yahoo.com> - 2015-03-20 09:48 -0700
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-19 07:34 -0700
                Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-19 13:23 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 00:51 -0400
                Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-20 21:05 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-21 04:04 -0400
                Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-21 09:16 -0700
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-21 14:02 -0400
                Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-20 00:39 -0400
                Re: What is greenarrays up to lately? JUERGEN <epldfpga@aol.com> - 2015-03-19 07:15 -0700
          Re: What is greenarrays up to lately? Howerd <howerdo@yahoo.co.uk> - 2015-03-18 00:09 -0700
            Re: What is greenarrays up to lately? Paul Rubin <no.email@nospam.invalid> - 2015-03-18 00:23 -0700
            Re: What is greenarrays up to lately? lynx <rinkasu@kaze.void.null> - 2015-03-19 23:40 +0000
        Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-17 23:16 -0400
    Re: What is greenarrays up to lately? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-03-18 11:05 +0000
  Re: What is greenarrays up to lately? rickman <gnuarm@gmail.com> - 2015-03-22 22:38 -0400

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