199 FIR Filter

199 : FIR Filter

  • Author: Daniel Gonz├ílez
  • Description: FIR Filter with 4 coefficients
  • GitHub repository
  • GDS submitted
  • HDL project
  • Extra docs
  • Clock: 10000000 Hz
  • External hardware: Requires a microcontroller to send the x[n] values for the input signal

picture

How it works

Uses for coefficients which can be defined by the user with the swtichs, or by default 1s are used. The last 4 values of the input signal are multiplied by the coefficients and sum to generate the output value.

How to test

You have to send the input signal x[n] with the uio_in, and the output uio_out will be the output signal y[n]

IO

# Input Output Bidirectional
0 {‘ui_in’: ‘Assign custom coefficients, ui_in[7:3] with sel [2:1] and enable [0]’} {‘uio_out’: ‘Output y[n]’} None
1 {‘uo_out’: ‘does nothing’} n/a n/a
2 {‘ui_in’: ‘Input x[n]’} n/a n/a
3 {‘uio_oe’: ‘does nothing’} n/a n/a
4 {’ena’: ’enables the shift register for taking the inputs’} n/a n/a
5 {‘clk’: ‘clock’} n/a n/a
6 {‘rst_n’: ‘when 0 past values of x[n] are set to 0 and coefficients to 1s’} n/a n/a
7 n/a n/a n/a