Hey Andrew Thank you so much for the explanation.
Is there a way to get around it by using a similar kind of block? Or should I rethink the sine wave that I generated that makes use of 602 000 000 data points? Thanks for the help! Heystek > On 26 Nov 2021, at 15:46, Andrew Martens <[email protected]> wrote: > > Hi Heystek > > Simulink has a maximum BRAM size of 64k (16 bits address size). A 32 bit > address size would equate to 4G addresses, which is far larger than the > amount of BRAM available in the FPGA. > > Regards > Andrew > > On Fri, Nov 26, 2021 at 3:40 PM Heystek Grobler <[email protected] > <mailto:[email protected]>> wrote: > Hey everyone. > > I have one last question regarding the BRAM. For my application I need an > address width of 32, but I get the error that the maximum allowable address > width is 16. Is there away around this problem or a way to get the BRAM to > use an address width of 32? > > Thanks for the help! > > Heystek > >> On 25 Nov 2021, at 21:28, Dan Werthimer <[email protected] >> <mailto:[email protected]>> wrote: >> >> >> hi morag. >> >> thanks for helping everyone. >> >> best wishes, >> >> dan >> >> >> >> >> On Thu, Nov 25, 2021 at 11:25 AM Morag Brown <[email protected] >> <mailto:[email protected]>> wrote: >> Happy to help :) >> >> On Thu, Nov 25, 2021 at 9:19 PM Heystek Grobler <[email protected] >> <mailto:[email protected]>> wrote: >> Hey Morag! >> >> Know I understand! >> >> It is working. >> >> <Screenshot 2021-11-25 at 21.18.00.png> >> >> Thank you so much for the help!!! >> >> Heystek >> >>> On 25 Nov 2021, at 21:08, Morag Brown <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> Hi Heystek, >>> >>> Great! >>> >>> I think Jack mentioned in an earlier email that the maximum number that can >>> be represented by a <32,31> fixed point system is 1 - 2^-31. Reducing the >>> magnitude of your sinusoid so that the peak value is below this maximum >>> would work. Or alternatively, scaling your values by an amount less than >>> 2^31 would have the same effect. >>> >>> Morag >>> >>> On Thu, Nov 25, 2021 at 8:59 PM Heystek Grobler <[email protected] >>> <mailto:[email protected]>> wrote: >>> Hey Morag >>> >>> That worked! >>> >>> When I read the packed sine wave from the BRAM, unpack it and plot it, I >>> get this: >>> >>> <Screenshot 2021-11-25 at 20.56.16.png> >>> >>> I assume there is one data point that is causing problems at 1 or -1 that >>> is overflowing? Any idea how I can fix that? >>> >>> Heystek >>> >>>> On 25 Nov 2021, at 20:22, Morag Brown <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> >>>> Hi Heystek, >>>> >>>> You would need to increase the BRAM depth to one that can store all your >>>> data - currently, because the address width is 10, it can only store 2^10 >>>> (1024) points and you're trying to write 6020. So you would need to >>>> increase the address width to an appropriate size. >>>> >>>> Morag >>>> >>>> On Thu, Nov 25, 2021 at 8:05 PM Heystek Grobler <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> Hey Morag >>>> >>>> The BRAM has an address width 10 and a data width of 32. >>>> >>>> Should I increase it? >>>> >>>> Heystek >>>> >>>>> On 25 Nov 2021, at 19:52, Morag Brown <[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> >>>>> Hi Heystek, >>>>> >>>>> How big is the BRAM in your design? Does it have enough space to >>>>> accommodate the amount of data you're trying to write to it? >>>>> >>>>> Morag >>>>> >>>>> On Thu, Nov 25, 2021 at 6:59 PM Heystek Grobler <[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> Hey Morag and Jack >>>>> >>>>> Thank you for the suggestions. >>>>> >>>>> I played around a little bit. if I create the sine wave the same as you >>>>> Morag, then it works. I am able to write it to the bram, read it back >>>>> from the bram, unpack it and get the same signal back. As soon as I use >>>>> the sine wave that I require for my application, then it breaks again. >>>>> >>>>> Here is what I achieved using your sine wave Morag (ps iI changed my >>>>> design to 32 bit): >>>>> >>>>> <Screenshot 2021-11-25 at 18.49.04.png> >>>>> >>>>> >>>>> <Screenshot 2021-11-25 at 18.49.34.png> >>>>> >>>>> <Screenshot 2021-11-25 at 18.49.58.png> >>>>> >>>>> When I use my sign wave, then it does not work: >>>>> >>>>> <Screenshot 2021-11-25 at 18.55.45.png> >>>>> >>>>> <Screenshot 2021-11-25 at 18.56.02.png> >>>>> >>>>> <Screenshot 2021-11-25 at 18.56.14.png> >>>>> >>>>> <Screenshot 2021-11-25 at 18.56.43.png> >>>>> >>>>> The only thing that changed is the sine wave. is there something that I >>>>> am missing? >>>>> >>>>> Thanks for the help! I really appreciate it! >>>>> >>>>> Heystek >>>>> >>>>> >>>>>> On 25 Nov 2021, at 14:57, Morag Brown <[email protected] >>>>>> <mailto:[email protected]>> wrote: >>>>>> >>>>>> I think that's because the functions used in both In[15] and In[16] do >>>>>> the same thing. See the screenshots below to see what I mean. So you >>>>>> construct the raw bytes data in In[15] and then try to pack that as an >>>>>> integer in In]16}, which won't work because struct.pack('>i',A_y) >>>>>> expects data of type int while you're actually giving it data of type >>>>>> bytes. To pack the data using struct.pack() you would need to pass it an >>>>>> int (or array of ints and tell it how many points you're packing). I >>>>>> think (someone please correct me if I'm wrong) that you only need to do >>>>>> one or the other to get the correct raw data to be written to BRAM. >>>>>> >>>>>> <Screenshot from 2021-11-25 14-55-29.png> >>>>>> <Screenshot from 2021-11-25 14-55-39.png> >>>>>> >>>>>> I also see you're scaling up by 2^31, but I think your BRAM is data >>>>>> width is 16 bits, so you'd likely want to scale by 2^15? >>>>>> >>>>>> Morag >>>>>> >>>>>> On Thu, Nov 25, 2021 at 12:46 PM Heystek Grobler >>>>>> <[email protected] <mailto:[email protected]>> wrote: >>>>>> Hey Jack and Morag >>>>>> >>>>>> thank you for the advice and help! i am still getting errors and is >>>>>> stuck. Below is the new errors: >>>>>> >>>>>> <Screenshot 2021-11-25 at 12.41.43.png> >>>>>> >>>>>> <Screenshot 2021-11-25 at 12.42.53.png> >>>>>> >>>>>> I have also attached the new script I am working on. >>>>>> >>>>>> Could it be that I am generating the sine wave incorrectly? I have about >>>>>> 600 000 000 points that I am working with. >>>>>> >>>>>> I keep getting “cannot convert argument to integer when running >>>>>> struct.pack. >>>>>> >>>>>> Thanks for the help! >>>>>> >>>>>> Heystek >>>>>> >>>>>> >>>>>>> On 23 Nov 2021, at 14:31, Jack Hickish <[email protected] >>>>>>> <mailto:[email protected]>> wrote: >>>>>>> >>>>>>> Hi Heystek, >>>>>>> >>>>>>> Assuming your BRAM is set for 32-bit wide, you probably want to be >>>>>>> writing the values with 31 bits below the binary point -- i.e. >>>>>>> normalized to the range [-1, 1) (aka simulink FIx32_31). In this case >>>>>>> the packed values would be: >>>>>>> >>>>>>> struct.pack('>i', int(floating_point_sine_value * 2**31)) >>>>>>> >>>>>>> Though, be careful, because +1.0 isn't included in this number >>>>>>> representation (the maximum is 1 - 2**-31) , so you might want to >>>>>>> include some saturation logic (or scale up by a value less than 2**31). >>>>>>> >>>>>>> For what it's worth, you can pack an entire numpy array with: >>>>>>> floating_point_numpy_array.astype('>i').tobytes() ,which saves looping >>>>>>> and appending to a binary string. >>>>>>> >>>>>>> Does that help? >>>>>>> >>>>>>> Cheers >>>>>>> Jack >>>>>>> >>>>>>> On Mon, 22 Nov 2021 at 18:10, Heystek Grobler <[email protected] >>>>>>> <mailto:[email protected]>> wrote: >>>>>>> Hey Jack >>>>>>> >>>>>>> I am also well thank you. We are starting to go back to the observatory >>>>>>> (HartRAO) again. >>>>>>> >>>>>>> Here is a snippets of the python code that I am using as well as my >>>>>>> simulink design: >>>>>>> >>>>>>> The first nipped is where I create the sine wave: >>>>>>> >>>>>>> The second snipped is where I plot the sine wave: >>>>>>> >>>>>>> >>>>>>> The third snipped is where I pack the sine wave array: >>>>>>> >>>>>>> >>>>>>> The fourth snipped is where I write the packed data to the BRAM: >>>>>>> >>>>>>> >>>>>>> Snipped 5 is where I want to use the sine wave and cosine wave: >>>>>>> >>>>>>> >>>>>>> But to check that it is working, I have created the simple design in >>>>>>> snipped 6: >>>>>>> >>>>>>> >>>>>>> I have also attached my simulink design and python script. >>>>>>> >>>>>>> Thank you for the help! >>>>>>> >>>>>>> Heystek >>>>>>> >>>>>>> >>>>>>>> On 22 Nov 2021, at 18:55, Jack Hickish <[email protected] >>>>>>>> <mailto:[email protected]>> wrote: >>>>>>>> >>>>>>>> Hi Heystek, >>>>>>>> >>>>>>>> All good here (in London), Thanks. Hope things are going ok with you >>>>>>>> too! >>>>>>>> >>>>>>>> I've taken this back on list for the benefit of others. Do you have: >>>>>>>> >>>>>>>> a) a snippet of some python code which you're using at the moment >>>>>>>> b) A Simulink snippet of the BRAM you're trying to write to, >>>>>>>> indicating how the bram is configured and how its data are being used? >>>>>>>> >>>>>>>> Cheers >>>>>>>> Jack >>>>>>>> >>>>>>>> On Mon, 22 Nov 2021 at 16:52, Heystek Grobler >>>>>>>> <[email protected] <mailto:[email protected]>> wrote: >>>>>>>> Hey Jack >>>>>>>> >>>>>>>> How are you? It has been a while since we last spoke. >>>>>>>> >>>>>>>> I am really struggling to pack data into binary format for my design. >>>>>>>> I was wondering if you have time if you can please help me with it. I >>>>>>>> have no clue if what i am doing is correct and there is no one around >>>>>>>> me with the knowledge to help me. >>>>>>>> >>>>>>>> All that I want to do is too pack a sine wave that I already >>>>>>>> generated, and write it to a BRAM. >>>>>>>> >>>>>>>> I hope to hear from you soon! >>>>>>>> >>>>>>>> Heystek >>>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "[email protected] <mailto:[email protected]>" >>>>>> group. >>>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>>> an email to [email protected] >>>>>> <mailto:[email protected]>. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/8791F6EA-204B-4BCC-B0DC-3CAD3D928A05%40gmail.com >>>>>> >>>>>> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/8791F6EA-204B-4BCC-B0DC-3CAD3D928A05%40gmail.com?utm_medium=email&utm_source=footer>. >>>>>> >>>>>> -- 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discussion on the web visit >>>>> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/5B9A4F5B-4F61-4CF6-AC06-6BD3432B11AB%40gmail.com >>>>> >>>>> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/5B9A4F5B-4F61-4CF6-AC06-6BD3432B11AB%40gmail.com?utm_medium=email&utm_source=footer>. >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google Groups >>>>> "[email protected] <mailto:[email protected]>" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send an >>>>> email to [email protected] >>>>> <mailto:[email protected]>. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0TfPZw9xvQbrTbB0Vyq%2BnQwpeFaeBLy9zG0D2Hi%2BqtHd_w%40mail.gmail.com >>>>> >>>>> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0TfPZw9xvQbrTbB0Vyq%2BnQwpeFaeBLy9zG0D2Hi%2BqtHd_w%40mail.gmail.com?utm_medium=email&utm_source=footer>. >>>> >>>> >>>> -- 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