how to set the decimal and fractional bits (m.n) for sink_real and sink_imag when i use Fixed Point?

[masato1]

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

[Kshitij_Intel]

Hi,

In which IP you want to set the bits?

Thank you,

Kshitij Goel

[masato1]

FFT IP core

[Kshitij_Intel]

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

[masato1]

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_real

Input

data

data precision width

Real input data, which represents a signed number of data precision bits.

[Kshitij_Intel]

Hi,

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

You can check also.

Thank you,

Kshitij Goel

[masato1]

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.

[Kshitij_Intel]

Hi,

My apologies, it will not contain any fractional data.

Thank you,

Kshitij Goel

[Kshitij_Intel]

Hi,

My apologies, it will not contain any fractional data.

Thank you,

Kshitij Goel

[masato1]

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

[Kshitij_Intel]

Hi,

It will not contain any fractional data.

Thank you,

Kshitij Goel