{"id":30720259,"url":"https://github.com/coderarjob/signal.echo","last_synced_at":"2025-09-03T11:02:06.308Z","repository":{"id":297446885,"uuid":"993437180","full_name":"coderarjob/signal.echo","owner":"coderarjob","description":"Demo board which generates sample signals experimenting/checking oscilloscope features","archived":false,"fork":false,"pushed_at":"2025-09-02T20:25:18.000Z","size":14129,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-09-02T22:18:01.659Z","etag":null,"topics":["c","demo-board","electronics","kicad","oscilloscope","signal-generator","ziglang"],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/coderarjob.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,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2025-05-30T19:39:23.000Z","updated_at":"2025-09-02T20:25:21.000Z","dependencies_parsed_at":"2025-07-08T20:30:37.428Z","dependency_job_id":"8e360e3d-0d91-4d51-a510-0f68e208b10d","html_url":"https://github.com/coderarjob/signal.echo","commit_stats":null,"previous_names":["coderarjob/scopetester","coderarjob/signal.echo"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/coderarjob/signal.echo","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/coderarjob%2Fsignal.echo","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/coderarjob%2Fsignal.echo/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/coderarjob%2Fsignal.echo/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/coderarjob%2Fsignal.echo/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/coderarjob","download_url":"https://codeload.github.com/coderarjob/signal.echo/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/coderarjob%2Fsignal.echo/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":273431417,"owners_count":25104496,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-09-03T02:00:09.631Z","response_time":76,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"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":["c","demo-board","electronics","kicad","oscilloscope","signal-generator","ziglang"],"created_at":"2025-09-03T11:00:44.762Z","updated_at":"2025-09-03T11:02:06.285Z","avatar_url":"https://github.com/coderarjob.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003cp align=\"center\"\u003e\n    \u003cimg src=\"/docs/images/logo.png\"/\u003e\n    \u003cbr/\u003e\n    \u003cbr/\u003e\n    \u003cimg src=\"https://github.com/coderarjob/ScopeTester/actions/workflows/utbuild.yaml/badge.svg\"/\u003e\n    \u003cimg src=\"https://github.com/coderarjob/ScopeTester/actions/workflows/fwbuild.yaml/badge.svg\"/\u003e\n\u003c/p\u003e\n\n## About\n\nThis is a hardware project based on Atmega8A microcontroller. This project came about from a\npersonal need for a demo board to test my new oscilloscope. I plan to create a complete PCB\nalong with firmware in this repo.\n\n### Screenshots\n\n##### 1. Serial RS232 (TTL Level) decoding test\n\n![rs232](docs/images/usart.png)\n\n##### 2. Serial I2C decoding test\n\n![rs232](docs/images/i2c.png)\n\n##### 3. Positive \u0026 negative Runt detection pulse\n\n![Positive runt pulse](docs/images/positive_runt.png)\n\n![Negative runt pulse](docs/images/negative_runt.png)\n\n##### 4. Burst mode pulses\n\n![Negative runt pulse](docs/images/burst_pulses.png)\n\n##### 5. Sine wave\n\n![Sine wave](docs/images/sine_wave.png)\n![Sine wave](docs/images/sine_wave_freq_dist.png)\n![Sine wave](docs/images/sine_wave_fft.png)\n\n##### 5. Amplitude Modulation wave\n\n![Sine wave](docs/images/am_wave.png)\n![Sine wave](docs/images/am_wave_fft.png)\n\n##### 6. Triangle wave\n\n![Triangle wave](docs/images/triangle_wave.png)\n![Triangle wave](docs/images/triangle_wave_freq_dist.png)\n![Triangle wave](docs/images/triangle_wave_fft.png)\n\n##### 7. Sawtooth wave\n\n![Sawtooth wave](docs/images/sawtooth_wave.png)\n![Sawtooth wave](docs/images/sawtooth_wave_freq_dist.png)\n![Sawtooth wave](docs/images/sawtooth_wave_fft.png)\n\n### Goals\n\n- [X] Firmware: RS232 sample output (positive)\n- [X] Firmware: I2C sample output\n- [X] Firmware: Runt pulse (+ve \u0026 -ve runt pulses)\n- [X] Firmware: Sine wave pattern\n- [X] Firmware: Amplitude Modulation wave pattern\n- [X] Firmware: Triangle wave pattern\n- [X] Firmware: Sawtooth wave pattern\n- [X] Firmware: Burst data in two lines\n- [X] Firmware: Separate arch independent codes\n- [X] Unittests: Add unittests for utils\n- [X] Unittests: Add unittests for existing tests\n\n## Building prerequisites\n\n1. Requires Linux environment for building.\n2. GNU Make\n3. avr-gcc\n4. avr-libc\n\n### Firmware\n\n```\nBUILD_DIR=out make\n```\n\nFirmware is the `./out/firmware.hex` file. To program micro with avrdude, we can do `make program`.\n\n### Unittests\n\nWe can build every unittests and run them using the `run` target.\n\n```\nBUILD=ut BUILD_DIR=out/ut make run\n```\n\n### Tools\n\nSome tools which are used exclusively in this project are/will be put into the `tools` folder. Each\nmay have different prerequisites and build procedures. For information see `Readme.md` of each\ntool.\n\n# Feedback\n\nOpen a GitHub issue or drop a email at arjobmukherjee@gmail.com. I would love to hear your\nsuggestions and feedbacks.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcoderarjob%2Fsignal.echo","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcoderarjob%2Fsignal.echo","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcoderarjob%2Fsignal.echo/lists"}