SIMULINK Datatype mysmatch error

Hello all!

I'm quite new to SIMULINK model-design and i have stumbled into an error, and I though I might ask for help here, since there may be a better way to handle this implementation.

Currently, I'm implementing this piece of (a fft benchmark) C code into SIMULINK Model-based design:

for ( i=rev=0; i < NumBits; i++ )
    {
        rev = (rev << 1) | (index & 1);
        index >>= 1;
    }

So far, this what I've got:

However, i got these two datatype mismatch error,

Data type mismatch. Input port 2 of 'fftModel/iteratorNumSamples /For Iterator Subsystem/Bitwise Operator' expects a signal of data type 'uint32'. However, it is driven by a signal of data type 'ufix32_E1'.

Data type mismatch. Output port 1 of 'fftModel/iteratorNumSamples /For Iterator Subsystem/Shift Arithmetic' is a signal of data type 'ufix32_E1'. However, it is driving a signal of data type 'uint32'.

To fix this, I thought into putting a Data Type Conversion block, but this block changes the code behavior. Is there an easy way to fix this?

Thanks in advance.

Answer 1

[Mark McBroom]

In Shift Arithmetic block, make sure the "Binary points to shift" is set to zero.