Lightweight UART sender and receiver for the lattice icestick. The default configuration can be found at hdl/uart_top.vhd. Every received word gets echoed back. The parameters are 115200/8-N-1 (https://en.wikipedia.org/wiki/8-N-1). However, sender and receiver can be used independently and the parameter can be modified.
- hdl: Contains the hardware design.
- sim: Contains a few testbenches.
- syn: Contains the scripts and constraints for synthesis.
- Plug in your icestick
- Synthesize the design and upload the bitstream:
cd syn && ./synth.sh - Communication
When developing, two communication options were used:
- via terminal, for example putty:
- Make sure your user is in the
dialoutgroup:sudo usermod -a -G dialout ${USER} - Start putty via:
putty /dev/ttyUSB1 -serial -sercfg 115200,8,n,1,N - Type something. The received data from the icestick should be displayed in the terminal.
- Make sure your user is in the
- via python: see
sim/uart_tx.py
For the default configuration, the following resources are needed:
| resource | absolute usage | relative usage |
|---|---|---|
| ICESTORM_LC | 83/ 1280 | 6% |
| ICESTORM_RAM | 0/ 16 | 0% |
| SB_IO | 4/ 112 | 3% |
| SB_GB | 1/ 8 | 12% |
| ICESTORM_PLL | 0/ 1 | 0% |
| SB_WARMBOOT | 0/ 1 | 0% |