{"id":13812961,"url":"https://github.com/strawberryhacker/operating-system-cortex-a5","last_synced_at":"2025-05-14T22:31:27.353Z","repository":{"id":157962964,"uuid":"293161242","full_name":"strawberryhacker/operating-system-cortex-a5","owner":"strawberryhacker","description":"Operating system","archived":false,"fork":false,"pushed_at":"2021-01-20T05:46:29.000Z","size":13075,"stargazers_count":32,"open_issues_count":22,"forks_count":2,"subscribers_count":3,"default_branch":"master","last_synced_at":"2025-03-22T15:48:14.658Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/strawberryhacker.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.md","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":"2020-09-05T22:04:03.000Z","updated_at":"2024-06-13T19:02:44.000Z","dependencies_parsed_at":"2024-06-24T01:11:47.744Z","dependency_job_id":null,"html_url":"https://github.com/strawberryhacker/operating-system-cortex-a5","commit_stats":null,"previous_names":["bobletroll/operating-system-cortex-a5","strawberryhacker/operating-system-cortex-a5"],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/strawberryhacker%2Foperating-system-cortex-a5","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/strawberryhacker%2Foperating-system-cortex-a5/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/strawberryhacker%2Foperating-system-cortex-a5/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/strawberryhacker%2Foperating-system-cortex-a5/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/strawberryhacker","download_url":"https://codeload.github.com/strawberryhacker/operating-system-cortex-a5/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":254239573,"owners_count":22037730,"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","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":[],"created_at":"2024-08-04T04:00:58.733Z","updated_at":"2025-05-14T22:31:22.299Z","avatar_url":"https://github.com/strawberryhacker.png","language":"C","readme":"## Summary\r\n\r\nCitrus is a bare metal lightweight operation system designed for the Cortex®-A series. Every thing will be completely bare metal - no libraries - literally.\r\n\r\n## Making an application\r\n\r\nComing soon\r\n\r\n## Install\r\n\r\nDownload and burn the disk image file and insert into the board. This will load the bootloader which will load the kernel. To enter debug mode, connect a jumper to PC20 and make the kernel using make install. \r\n\r\n## Building\r\n\r\nSome packages is required in order to build the operating system. I recomend using Ubuntu, either native or in WSL. The build-essentials package is used for running make, and the gcc-arm-none-eabi is the compiler toolchain used for building and debugging the operating system.\r\n\r\n```\r\n\u003e sudo apt update\r\n\u003e sudo apt install build-essential\r\n\u003e sudo apt install gcc-arm-none-eabi\r\n```\r\n\r\nThen you must install the second stage bootloader; c-boot, which will load the operating system into main memory.\r\n\r\n```\r\n\u003e git clone https://github.com/strawberryhacker/c-boot\r\n\u003e cd c-boot\r\n\u003e make\r\n```\r\n\r\nThis will generate a binary called **boot.bin** in the build/ folder. Place this file in the **root** directory of a FAT formatted SD card and plug it into the board. The next step is to download and build the kernel. \r\n\r\n```\r\n\u003e git clone https://github.com/strawberryhacker/citrus\r\n\u003e cd citrus\r\n\u003e make install\r\n```\r\n\r\nThis will load the kernel image to main memory over serial and start it. Support for loading the kernel from an SD card will be added to c-boot later. \r\n","funding_links":[],"categories":["OS"],"sub_categories":["Random Number Generation"],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstrawberryhacker%2Foperating-system-cortex-a5","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fstrawberryhacker%2Foperating-system-cortex-a5","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstrawberryhacker%2Foperating-system-cortex-a5/lists"}