101 Conway's Game of Life on UART and VGA
101 : Conway's Game of Life on UART and VGA
- Author: Ciro Cattuto
- Description: A simulation of Conways' Game of Life visualized to an ANSI terminal over UART and to VGA
- GitHub repository
- Clock: 24000000 Hz
How it works
This projects simulates Conway's Game of Life in hardware on a small (32x16) grid with periodic boundary conditions. At each time step, the output of the simulation is printed to an ANSI serial terminal over a serial (UART) interface. The initial state of the board is pseudo-random, generated using a linear-feedback shift register. Single characters received over the serial interface are used to control the simulation, according to the following table:
<space>: start/stop simulation0: randomize state1: single-step the simulation
The UART interface of the project is exposed according the the Tiny Tapeout recommended pinout, with ui_in[3] used for RX signal and uo_out[4] for TX. The UART is configured as 8N1 at 115200 baud, with no flow control.
VGA output of the simulation state is also exposed on the bidirectional pins, that are all configured as outputs and wired to work with a TinyVGA PMOD.
How to test
Connected the UART interface of the project to any UART terminal, or to an UART-to-USB PMOD or adapter, e.g., the one provided by the onboard RP2040 of the PCB. Configure the serial interface for 8 bits, 1 start bit, no parity bit, 1 stop bit (8N1), with no hardware or software flow control. Open the terminal and type any character: this will bring up a welcome message explaining how to control the simulation.
External hardware
UART terminal, or UART-to-USB adapter (PMOD or on-board via RP2040). And/or TinyVGA PMOD for VGA output.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | simulation start | hsync | |
| 1 | simulation randomization | B[0] | |
| 2 | G[0] | ||
| 3 | UART RX | R[0] | |
| 4 | UART TX | vsync | |
| 5 | B[1] | ||
| 6 | G[1] | ||
| 7 | R[1] |