myhdl-list

[myhdl-list] subtype RamWord_t

[Edward V. <dev...@sb...>]

Hello all,
In the process of learning myhdl and trying to convert a vdh code snippet to myhdl.
RAM_WIDTH_C = 16 is defined as constant 

subtype RamWord_t is unsigned(RAM_WIDTH_C-1 downto 0);  -- RAM word type.


RAM_SIZE_C = 16384
For addr I used 

addr_r = addr_r = Signal(intbv(0, min = 0, max = RAM_SIZE_C))

which converted  addr_r: out unsigned(13 downto 0); which
I am trying dataToRam_r = Signal(intbv(0, min = 0, max = 2**RAM_WIDTH_C - 1))
which is correct I think but not of subtype RamWord_t
dataToRam_r: out unsigned(15 downto 0);

What is the process to make it of type RamWord_t
Any and all help is appreciated.

Edward Vidal Jr.
e-mail dev...@sb...
915-595-1613

Re: [myhdl-list] subtype RamWord_t

[Christopher F. <chr...@gm...>]

That is correct, the first creates 14bits and the second
16bits as you specified.

     In [4] : RAM_WIDTH_C = 16
              RAM_SIZE_C = 16384
              t1 = intbv(0, min=0, max=RAM_SIZE_C)
              t2 = intbv(0, min=0, max=2**RAM_WIDTH_C)
              print(len(t1), len(t2))
     (14, 16)

     Int[5]: 2**14
     Out[5]: 16384

Regards,
Chris


On 10/2/2014 2:38 PM, Edward Vidal wrote:
> Hello all,
> In the process of learning myhdl and trying to convert a vdh code snippet to myhdl.
> RAM_WIDTH_C = 16 is defined as constant
>
> subtype RamWord_t is unsigned(RAM_WIDTH_C-1 downto 0);  -- RAM word type.
>
>
> RAM_SIZE_C = 16384
> For addr I used
>
> addr_r = addr_r = Signal(intbv(0, min = 0, max = RAM_SIZE_C))
>
> which converted  addr_r: out unsigned(13 downto 0); which
> I am trying dataToRam_r = Signal(intbv(0, min = 0, max = 2**RAM_WIDTH_C - 1))
> which is correct I think but not of subtype RamWord_t
> dataToRam_r: out unsigned(15 downto 0);
>
> What is the process to make it of type RamWord_t
> Any and all help is appreciated.
>
> Edward Vidal Jr.
> e-mail dev...@sb...
> 915-595-1613
>
>
>
> ------------------------------------------------------------------------------
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> myhdl-list mailing list
> myh...@li...
> https://lists.sourceforge.net/lists/listinfo/myhdl-list
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Re: [myhdl-list] subtype RamWord_t

[Christopher F. <chr...@gm...>]

There is no method to define a type for the generated
VHDL.  The generator will not create types in VHDL,
if you are integrating existing VHDL components with
MyHDL generated VHDL components you will need to use
conversion functions in the VHDL.

If you are having issues on the VHDL side, you can
post the VHDL code and someone might be able to help
or try one of the VHDL specific groups.

Regards,
Chris

On 10/2/2014 2:38 PM, Edward Vidal wrote:
> Hello all,
> In the process of learning myhdl and trying to convert a vdh code snippet to myhdl.
> RAM_WIDTH_C = 16 is defined as constant
>
> subtype RamWord_t is unsigned(RAM_WIDTH_C-1 downto 0);  -- RAM word type.
>
>
> RAM_SIZE_C = 16384
> For addr I used
>
> addr_r = addr_r = Signal(intbv(0, min = 0, max = RAM_SIZE_C))
>
> which converted  addr_r: out unsigned(13 downto 0); which
> I am trying dataToRam_r = Signal(intbv(0, min = 0, max = 2**RAM_WIDTH_C - 1))
> which is correct I think but not of subtype RamWord_t
> dataToRam_r: out unsigned(15 downto 0);
>
> What is the process to make it of type RamWord_t
> Any and all help is appreciated.
>
> Edward Vidal Jr.
> e-mail dev...@sb...
> 915-595-1613
>
>
>
> ------------------------------------------------------------------------------
> Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer
> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports
> Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper
> Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer
> http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk
>
>
>
> _______________________________________________
> myhdl-list mailing list
> myh...@li...
> https://lists.sourceforge.net/lists/listinfo/myhdl-list
>