PRJ2.FFT.md

 # Project2. Fast Fouriour Transform accelerator IP for RISC-V core
 
+## Design objective: 
+
+Design a 256 point FFT accelerator module for RISC-V, mounted on the ICB bus of Hummingbird E203.
+
+## Basic technical requirements:
+
+- 1.The input data stream (time series data, length=256) can be 32-bit fixed-point format;
+- 2.The input data can be pre-loaded into RAM with your program. Check your simulation waveform to verify the correctness of FFT process.
+- 3.The time of calculation(256 points FFT) should be less than 1ms.
+- 4. You can use Gowin's IP to implement FFT calculation.
+
+## Extended requirements (bonus points):
+
+- 1. Design a timer in your SoC for counting the time of calculation;
+- 2. Transfer input data and output result through UART.
+- 3. Design the FFT module from scratch. Multipliers for FFT calculation can use hardwired MAC macroblock, which is provided by FPGA.
+
+## Verification methodology
+
+- 1. For basic requirements, Matlab can be used to generate a signal(time series data) with specific harmonic components, and then import the data into SoC. The frequency domain sequence generated by Matlab's built-in FFT function can be used as reference data to compare with the calculation results done by your SoC; 
+- 2. Show your simulation waveforms of IP For the verification of basic technical requirements.
+
+## Other requirements
+
+The content of submission should include:
+
+- Project report:
+  - description of interfaces
+  - detailed implementation of core modules
+  - simulation waveforms
+  - explanations of key modules
+  - testing methods and processes
+  - references
+
+If you have done extension task3(FFT from scratch), please describe the detailed FFT calculation principles.
+
+
+## Scoring criteria
+
+Total scores:100
+
+| Item | Seq | Requirements | Score | remark |
+| -- | -- | -- | -- | -- |
+|    | 1  | Can achieve 256-pt FFT calculation | 50 |  |
+|    | 2  | Calculation time less than 1ms | 10 | |
+|    |    |
+