How to use FFT HDL Optimized ?

How to use FFT HDL Optimized block and IFFT HDL Optimized? I have some problems with them, I sent you my simulink project that made with HDL supported lib. Maybe you show me exaple of using this blocks? because when I try to generate vhdl I have problem with kernel of FFT.

Answer 1

[Bharath Venkataraman]

There is an example in HDL Coder "OFDM Receiver with 512-Point Streaming I/O FFT" that uses the FFT HDL Optimized block. Are you able to generate HDL code for that examples model (hdlcoder_ofdm_fft)?

[Niki]

No, it doesn't work, here is repot of compilation:

    DL Code Generation Check Report for hdlcoder_ofdm_fft
    Generated on 2014-04-29 13:53:06

    The following table describes blocks for which errors, warnings or messages were reported.

    Simulink Block  Level  Description
    hdlcoder_ofdm_fft/Channel/Dynamic AWGN  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Channel/Dynamic AWGN'.
    hdlcoder_ofdm_fft/Channel/Random Source  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Channel/Random Source'.
    hdlcoder_ofdm_fft/Channel/In1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Channel/Dynamic AWGN  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Deserializer/Buffer  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Deserializer/Buffer'.
    hdlcoder_ofdm_fft/Deserializer/Buffer  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver ADC/In1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver ADC/Rx ADC  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection/Data Type Conversion4  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection/Extract Data Carriers and Reorder1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection/Frame Conversion  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection/RX Power Scaling1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection/Rectangular QAM Demodulator Baseband  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1/Data Type Conversion4  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1/Extract Data Carriers and Reorder1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1/Frame Conversion  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1/RX Power Scaling1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1/Rectangular QAM Demodulator Baseband  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/IFFT  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/OFDM Transmitter/IFFT'.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/In1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/DSP Constant1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/DSP Constant2  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/DSP Constant3  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Gain  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Gain1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Input Packing  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/PN Sequence Generator  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Reorder [0,...,Fs]  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots/Subchannel Selector  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/In1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Append Cyclic Prefix  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/IFFT  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Insert Pilots  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Rectangular QAM Modulator Baseband  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/TX Power Scaling  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Tx ADC  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter/Tx DAC  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator/Random Source  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Random-Integer Generator/Random Source'.
    hdlcoder_ofdm_fft/Random-Integer Generator/Rounding Function  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Random-Integer Generator/Rounding Function'.
    hdlcoder_ofdm_fft/Random-Integer Generator/Data Type Conversion  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator/Frame Status Conversion  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator/Random Source  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator/Reshape  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator/Rounding Function  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Serializer/Unbuffer  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Serializer/Unbuffer'.
    hdlcoder_ofdm_fft/Serializer/Frame Conversion  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Simulink DSP FFT  Error  Cannot find the implementation for block 'hdlcoder_ofdm_fft/Simulink DSP FFT'.
    hdlcoder_ofdm_fft/Channel  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Receiver Symbol Detection1  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/OFDM Transmitter  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Random-Integer Generator  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Selector3  Error  Frame based models are not supported for HDL code generation.
    hdlcoder_ofdm_fft/Channel/Dynamic AWGN  Warning  Could not find tag for the block 'Dynamic AWGN'.

Answer 2

[Bharath Venkataraman]

You seem to be generating the HDL code for the entire model. Please select just the subsystem to generate HDL code.