{"id":17429780,"url":"https://github.com/marph91/icestick-uart","last_synced_at":"2026-03-19T01:03:20.938Z","repository":{"id":105039971,"uuid":"280686059","full_name":"marph91/icestick-uart","owner":"marph91","description":"Lightweight UART implementation in VHDL for the lattice icestick","archived":false,"fork":false,"pushed_at":"2021-05-14T14:46:35.000Z","size":23,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-07-20T09:35:04.499Z","etag":null,"topics":["fpga","ghdl","hardware","ice40","icestick","uart","vhdl","yosys"],"latest_commit_sha":null,"homepage":"","language":"VHDL","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mpl-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/marph91.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-07-18T15:38:11.000Z","updated_at":"2022-12-07T20:35:12.000Z","dependencies_parsed_at":null,"dependency_job_id":"82578739-ee69-4c55-9c8c-984df6fd5e36","html_url":"https://github.com/marph91/icestick-uart","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/marph91/icestick-uart","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marph91%2Ficestick-uart","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marph91%2Ficestick-uart/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marph91%2Ficestick-uart/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marph91%2Ficestick-uart/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/marph91","download_url":"https://codeload.github.com/marph91/icestick-uart/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marph91%2Ficestick-uart/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29148099,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-02-06T02:39:25.012Z","status":"ssl_error","status_checked_at":"2026-02-06T02:37:22.784Z","response_time":59,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["fpga","ghdl","hardware","ice40","icestick","uart","vhdl","yosys"],"created_at":"2024-10-17T07:09:01.465Z","updated_at":"2026-02-06T03:31:08.997Z","avatar_url":"https://github.com/marph91.png","language":"VHDL","funding_links":[],"categories":[],"sub_categories":[],"readme":"# icestick-uart\n\nLightweight 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 (\u003chttps://en.wikipedia.org/wiki/8-N-1\u003e). However, sender and receiver can be used independently and the parameter can be modified.\n\n## Repository structure\n\n- hdl: Contains the hardware design.\n- sim: Contains a few testbenches.\n- syn: Contains the scripts and constraints for synthesis.\n\n## Usage\n\n1. Plug in your icestick\n2. Synthesize the design and upload the bitstream: `cd syn \u0026\u0026 ./synth.sh`\n3. Communication\n\nWhen developing, two communication options were used:\n\n- via terminal, for example putty:\n  - Make sure your user is in the `dialout` group: `sudo usermod -a -G dialout ${USER}`\n  - Start putty via: `putty /dev/ttyUSB1 -serial -sercfg 115200,8,n,1,N`\n  - Type something. The received data from the icestick should be displayed in the terminal.\n- via python: see `sim/uart_tx.py`\n\n## Resource usage\n\nFor the default configuration, the following resources are needed:\n\nresource | absolute usage | relative usage\n-------------|----------:|---:\nICESTORM_LC  |  83/ 1280 |  6%\nICESTORM_RAM |   0/   16 |  0%\nSB_IO        |   4/  112 |  3%\nSB_GB        |   1/    8 | 12%\nICESTORM_PLL |   0/    1 |  0%\nSB_WARMBOOT  |   0/    1 |  0%\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarph91%2Ficestick-uart","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmarph91%2Ficestick-uart","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarph91%2Ficestick-uart/lists"}