Check Block Compatibiity Error

Hi guys.

I have error during using HDL Workflow Advisor. The error is _ " Error: Product block with divide input (/) supports fixed point division only when the fraction length of output is equal to the fraction length of the dividend minus the fraction length of the divisor." _ . But, i dont understand what exactly the meaning is.

Does anyone know about this problem? How can I solve it? Thanks in advance

Answer 1

[Tim McBrayer]

HDL Coder only supports division for fixed-point numbers, not for doubles. Fixed point numbers are denoted by specifying a word length (in bits), a fraction length (in bits), and whether the value is signed. The choices for these parameters determine what values the fixed point type can hold, and with what precision.

In x = a/b, a is the dividend, b is the divisor, and x is the output. The error message is stating that fraction(x) == fraction(a) - fraction(b). So, if the dividend (a) has 8 bits of fraction, and the divisor (b) has 3, then the result (x) must have 5 fractional bits.

Answer 2

[Muhammad Rizwan]

Hi

I encountered the same problem.But my divisor and dividend both are whole numbers That means Dividend is 14 bit signed 2s complement data and I will normalize it with 2^8(8191 max positive number).

So botyh didnot have any fraction part but output should have fraction part.

How can I solve this issue?

Answer 3

[Kiran Kintali]

Can you share a sample model?

Thanks