MATLAB: Check Block Compatibiity Error

check block campatibilityHDL Codersimulink fixed point

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

Best Answer

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.
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