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

[Kshitij_Intel]

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