202 Rotary encoder
202 : 0b 011 001 010 : Rotary encoder
- Author: Wim Dams
- Description: Reads in a (incremental) rotary encoder and shows the result on the seven-segment display
- GitHub repository
- HDL project
- Extra docs
- Clock: 10000 Hz
- External hardware: Rotary encoder connected to pin A and pin B
How it works
The rotary pins are sampled every clock cycle. If a rising edge is detected on pin A, the 4 bit counter will be incremented/decremented depending on pin B. The counter is put on the seven segment display and a debounce time is started (125 clk cycles)
How to test
After reset, turn the rotary encoder and the counter should increment/decrement as you turn
IO
| # | Input | Output |
|---|---|---|
| 0 | clock | segment a |
| 1 | reset | segment b |
| 2 | Rotary encoder pin A (sometimes marked as CLK) | segment c |
| 3 | Rotary encoder pin B (sometimes marked as DT) | segment d |
| 4 | none | segment e |
| 5 | none | segment f |
| 6 | none | segment g |
| 7 | none | none |