199 FIR Filter
199 : FIR Filter
- Author: Daniel González
- 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
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 |