Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
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how to set the decimal and fractional bits (m.n) for sink_real and sink_imag when i use Fixed Point?

masato1
Beginner
795 Views

I do not find the setting for the decimal and fractional bits (m.n) . 

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Kshitij_Intel
Employee
664 Views

Hi,


In which IP you want to set the bits?


Thank you,

Kshitij Goel


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masato1
Beginner
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Kshitij_Intel
Employee
558 Views

Hi,


Please refer to the Column "Size" in the below link to understand about the input and output width w.r.t. different FFT parameter settings.


3.6.2. FFT IP Core Avalon-ST Signals (intel.com)


Thank you,

Kshitij Goel


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masato1
Beginner
548 Views

Thank you for your reply. According to the chart below, does that mean sink_real is a signed number with an integer part and without a fractional part?

sink_realInputdatadata precision widthReal input data, which represents a signed number of data precision bits.
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Kshitij_Intel
Employee
533 Views

Hi,


It is a signed number and it should contain the fractional part.


You can check also.


Thank you,

Kshitij Goel


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masato1
Beginner
530 Views

So I want to know how many bits of the integer part and how many bits of the fractional part. the manual did not tell me.

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Kshitij_Intel
Employee
443 Views

Hi,

 

My apologies, it will not contain any fractional data.

 

Thank you,

Kshitij Goel

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Kshitij_Intel
Employee
443 Views

Hi,

 

My apologies, it will not contain any fractional data.

 

Thank you,

Kshitij Goel

 

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masato1
Beginner
371 Views

So, you mean how many fractional data it determined by myself?

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Kshitij_Intel
Employee
334 Views

Hi,


It will not contain any fractional data.

 

Thank you,

Kshitij Goel


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Kshitij_Intel
Employee
202 Views

Hi,


As we do not receive any response from you on the previous answer that we have provided. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

 

Thank you,

Kshitij Goel


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