Hi Wang,
If you haven't seen it already, this memo is probably useful --
https://github.com/casper-astro/publications/blob/master/Memos/files/Black_box_memo.pdf
The PCORE yellow block doesn't contain anything because it doesn't actually
do anything in FPGA logic. All it does is tells the toolflow to include
extra source files in your build, which should have been pre-generated. The
memo above explains how to do this.
Cheers
Jack
On Wed, 31 Aug 2022 at 09:00, Morag Brown <mbr...@sarao.ac.za> wrote:
> Hi Wang,
>
> I can't answer the first question, and your third is a bit confusing. Can
> you send a screenshot of the block you mean?
>
> As for the shared_bram - this instantiates bram on hardware that is
> exposed to the axi/wishbone (depending on the hardware) bus. You can write
> values (*vals*) to this block via casperfpga by packing your data using "*buf
> = struct.pack('>1024i', *vals)"*, and then write to the bram using*
> "fpga.write('memory
> device name', buf, offset)"*. To read from the bram you would do a
> "*struct.unpack('>1024i',
> fpga.read('memory device name',1024*4,0))"* call - the values 1024, 4 and
> *i* will change depending on the depth of you bram and your data width.
> Within the design, you need to have a counter on the address line to
> iterate through the addresses that you are writing to, and if you are
> planning on writing to the block via casperfpga then you should set *write
> enable *and *data input* to 0; and if you are planning to write in over
> the data line, then *write enable* should be set high with the data line
> tied to wherever your values are coming from. In simulation, you can write
> an array of values (for simulation only) to the "initial values" text box
> within the block that opens when you double click. Then to see what the
> output is doing, you can add a simulink scope block to the bram output.
>
> Hope this helps a bit!
>
> Morag
>
> On Wed, Aug 31, 2022 at 7:48 AM Wang <sandang19990...@gmail.com> wrote:
>
>> Hello CASPER，
>>
>> I am currently looking at David's simulink model of PAPER correlator and
>> some other people built simulink models.
>>
>> I met some questions in the process of looking at it.
>> I have been exposed to simulink for a short time and it is not clear how
>> some modules work.
>>
>> The first question.Double-click on the PCORE block and prompt me for a
>> path. I imitate David's input, but no response. Then I check David's PCORE
>> block inside also nothing, may I ask what is wrong with my operation?
>>
>> The second question.I see Share_BRAM blocks used a lot. I want to
>> understand the details of this block, the official website does not seem to
>> have Share_BRAM description. Also, I want to see what is happening to
>> Share_BRAM during simulation. What blocks can I do this with?
>>
>> The third question.I see that a yellow block (not the same color as
>> Casper-libary's block) does not have a library link. A window appears
>> after double-click :
>> Function Block Parameters: block's name
>> Subsystem (mask)
>> Parameters
>> Number of fft channels (same ad fft prompt)(2^?)
>> Is it a Subsystem block? If yes, how to add the function of double click
>> setting parameter?
>>
>> I really hope you can reply to me, I will be very grateful!
>>
>> BW
>> Wang
>>
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