Re: [myhdl-list] Third-party modules?
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Re: [myhdl-list] Third-party modules?
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From: Wesley N. <we...@sk...> - 2011-11-21 07:45:07
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Hi Gary,
We are doing a similar thing, we are "wrapping" verilog module
instantiations in MyHDL and then writing simulation models for them.
We are instantiating the verilog like such:
#model
@always(clk.posedge)
def logic():
if (rst == 0 and out < COUNT_TO):
if (en == 1):
out == out + STEP
else:
out = COUNT_FROM
#verilog instantiation
__verilog__ = \
"""
counter
#(
.ARCHITECTURE (%(ARCHITECTURE)s),
.DATA_WIDTH (%(DATA_WIDTH)s),
.COUNT_FROM (%(COUNT_FROM)s),
.COUNT_TO (%(COUNT_TO)s),
.STEP (%(STEP)s)
) counter_%(block_name)s (
.clk (%(clk)s),
.en (%(en)s),
.rst (%(rst)s),
.out (%(out)s)
);
"""
You can see what we are doing at: https://github.com/casper-astro/hdl_devel
.
An good example would be the counter module at:
https://github.com/casper-astro/hdl_devel/tree/master/libraries/primitives/counter
Hope this helps.
Wes
On Sun, Nov 20, 2011 at 7:43 PM, garyr <ga...@fi...> wrote:
> ----- Original Message -----
> From: "Christopher Felton" <chr...@gm...>
> To: <myh...@li...>
> Sent: Saturday, November 19, 2011 8:50 PM
> Subject: Re: [myhdl-list] Third-party modules?
>
>
> > On 11/19/11 8:41 PM, garyr wrote:
> >> Thanks for the information. Can this type of code be tested with the
> >> MyHDL
> >> simulator? I have tried something very similar to that but it appeared
> to
> >> have no effect during simulation.
> >
> > If you do CoSimulation you can test the 3rd party IP (presumed to be
> > Verilog or VHDL). If you want to do MyHDL simulation only, you have to
> > create a model for the IP (or better yet request the IP vendor to create
> > a MyHDL/Python model :) ).
> >
> > Hope that helps,
> > Chris
>
> I should have described my problem in more detail. I'm not actually dealing
> with a third-party module, just modules I have written. I have a utility
> module that I wish to use (not concurrently) with two other modules . I
> wrote some test code and followed the procedure described in Section 8.8
> of the MyHDL manual (which you also described) and inserted a bit of
> Verilog
> code in the primary module that I thought would instantiate the utility
> module. But when I run the simulation it appears that the utility module is
> not instantiated. Here is a bit of my test code:
>
> def test(overflow, count):
> @always(overflow.negedge)
> def logic():
> pass
> count.driven = "wire"
> return logic
> test.verilog_code =\
> """overflowCounter inst_1(.ovfl($overflow), .overflowCount($count));"""
>
> def simpleCounter(reset, signal, gate, count, ofCount):
> overflow = Signal(intbv(0)[5:])
> instTest = test(overflow, ofCount)
> instCounter = counter(reset, signal, gate, count, overflow)
> return instTest, instCounter
>
> The module counter (not shown) is a gated counter; the signal overflow is
> toggled when the counter overflows. The function of the module
> overflowCounter (also not shown) is to count the number of times overflow
> occurred. These two modules when instantiated together as in section 8.4 of
> the manual or in a test bench function correctly. I know very little about
> HDL so the bit of Verilog code above may be incorrect - please comment on
> that. Assuming the Verilog code is correct, if I instantiate the module
> simpleCounter in a test bench will all of the code, overflowCounter
> included, be simulated?
>
> Many thanks,
> Gary Richardson
>
> >
> >>
> >> ----- Original Message -----
> >> From: "Christopher Felton"<chr...@gm...>
> >> To:<myh...@li...>
> >> Sent: Saturday, November 19, 2011 3:00 PM
> >> Subject: Re: [myhdl-list] Third-party modules?
> >>
> >>
> >>> On 11/19/11 12:57 PM, garyr wrote:
> >>>> One of the entries in the MyHDL Frequently Asked Questions states that
> >>>> third-party modules may be instantiated by using "user-defined code to
> >>>> replace a MyHDL module by a corresponding instantiation". My attempts
> >>>> at this have not been successful. Could someone point me to an
> example?
> >>>>
> >>>> Thanks in advance for your replies.
> >>>>
> >>>>
> >>>
> >>> Here is a reply from a earlier, similar, inquiry. You might want to
> >>> refer to the old thread, http://bit.ly/uHcVZi.
> >>>
> >>> Regards,
> >>> Chris
> >>>
> >>>> Here is a small example to achieve what (I think) you are describing.
> >>>> More information can be found here,
> >>>>
> http://www.myhdl.org/doc/current/manual/conversion_examples.html#conv-usage-custom
> >>>>
> >>>> from myhdl import *
> >>>>
> >>>> def BurriedInstance(clk, rst, data_in, data_out):
> >>>>
> >>>> # ... Some Code
> >>>> bi = nativeInstance(clk, rst, data_in, data_out)
> >>>> # ... Some More Code
> >>>>
> >>>> return bi #other generators
> >>>>
> >>>> def nativeInstance(clk, rst, data_in, data_out):
> >>>>
> >>>> @always(clk, rst, data_in)
> >>>> def pass_thru():
> >>>> pass
> >>>> data_out.driven = "wire"
> >>>>
> >>>> nativeInstance.vhdl_code = """
> >>>> P1:ppc port map($clk, $rst, $data_in, $data_out);
> >>>> """
> >>>>
> >>>> return pass_thru
> >>>>
> >>>>
> >>>> if __name__ == '__main__':
> >>>> clk = Signal(False)
> >>>> rst = Signal(False)
> >>>> data_in = Signal(intbv(0)[8:])
> >>>> data_out = Signal(intbv(0)[8:])
> >>>> toVHDL(BurriedInstance, clk, rst, data_in, data_out)
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> ------------------------------------------------------------------------------
> >>> All the data continuously generated in your IT infrastructure
> >>> contains a definitive record of customers, application performance,
> >>> security threats, fraudulent activity, and more. Splunk takes this
> >>> data and makes sense of it. IT sense. And common sense.
> >>> http://p.sf.net/sfu/splunk-novd2d
> >>> _______________________________________________
> >>> myhdl-list mailing list
> >>> myh...@li...
> >>> https://lists.sourceforge.net/lists/listinfo/myhdl-list
> >>>
> >>
> >>
> >>
> >>
> ------------------------------------------------------------------------------
> >> All the data continuously generated in your IT infrastructure
> >> contains a definitive record of customers, application performance,
> >> security threats, fraudulent activity, and more. Splunk takes this
> >> data and makes sense of it. IT sense. And common sense.
> >> http://p.sf.net/sfu/splunk-novd2d
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > All the data continuously generated in your IT infrastructure
> > contains a definitive record of customers, application performance,
> > security threats, fraudulent activity, and more. Splunk takes this
> > data and makes sense of it. IT sense. And common sense.
> > http://p.sf.net/sfu/splunk-novd2d
> > _______________________________________________
> > myhdl-list mailing list
> > myh...@li...
> > https://lists.sourceforge.net/lists/listinfo/myhdl-list
> >
>
>
>
>
> ------------------------------------------------------------------------------
> All the data continuously generated in your IT infrastructure
> contains a definitive record of customers, application performance,
> security threats, fraudulent activity, and more. Splunk takes this
> data and makes sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-novd2d
> _______________________________________________
> myhdl-list mailing list
> myh...@li...
> https://lists.sourceforge.net/lists/listinfo/myhdl-list
>
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