485 Huffmann_Coder
485 : Huffmann_Coder
- Author: Marvin Barth
- Description: compresses ASCII input into Huffman codes
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
This ASIC compresses ASCII characters into Huffman codes, using a lookup table.
How to test
Send an ASCII character to ui[6:0], set ui[7] = 1 (Load), wait for valid_out = 1, then read the Huffman code from uo and uio.
External hardware
To communicate with the ASIC, you need either the RP2040 or an external MCU to send ASCII input and read the compressed Huffman output.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | ASCII_in[0] | Huffman_out[0] | Huffman_out[8] |
| 1 | ASCII_in[1] | Huffman_out[1] | Huffman_out[9] |
| 2 | ASCII_in[2] | Huffman_out[2] | Valid_out |
| 3 | ASCII_in[3] | Huffman_out[3] | Bit_length[0] |
| 4 | ASCII_in[4] | Huffman_out[4] | Bit_length[1] |
| 5 | ASCII_in[5] | Huffman_out[5] | Bit_length[2] |
| 6 | ASCII_in[6] | Huffman_out[6] | Bit_length[3] |
| 7 | Load | Huffman_out[7] |