Hi Heystek,
You can pre-compute the sinusoid values and only write the 1st quarter to
BRAM. To 'lookup' values simply read out the BRAM linearly. You could use a
counter as an address generator. Keep in mind that the address space of the
BRAM (and counter) represents only 1/4 of the waveform so
Hey Andrew
Yes, you read correctly, it is 602 million data points. I perhaps thought that
I might had to shorten the amount of data points. I played around and the bram
can comfortably handle 6020 data points and that still gives me a decent sine
wave if I plot it.
I would I implement a
Hey Heystek
I would recommend trying to figure out how to do your tests without needing
so many data points.
Cheers
On Fri, Nov 26, 2021 at 3:49 PM Heystek Grobler
wrote:
> Hey Andrew
>
> Thank you so much for the explanation.
>
> Is there a way to get around it by using a similar kind of
Hi Heystek,
It's a Friday afternoon so perhaps my eyes are deceiving me, but it looks
like you are wanting to store 602 million data points in BRAM? don't think
you are going to have too much luck with that. You could generate a
relatively fine grained cosine wave and only store the first 1/4
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
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
wrote:
> Hey everyone.
>
> I have
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!
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
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 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
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