Hong Meng technical community today issued a document that developers finally brush into OpenHarmony 3.0 on the Raspberry Pi 4B and run it up, although the function is incomplete, can only achieve the display and touch two This kind of operation is of great significance as a third-party device to support the Hongmeng system.
Huawei has donated all the basic capabilities of Hongmeng HarmonyOS to the Open Atom Open Source Foundation. The latter integrated the contributions of other participants to form the OpenAtom OpenHarmony ("OHOS") open-source project, and obtained Supported from several manufacturers, the latest version is 3.0.
The Open Atom Open Source Foundation is a non-profit organization dedicated to promoting the development of the global open source industry. It was jointly initiated by leading technology companies such as Alibaba, Baidu, Huawei, Inspur, 360, Tencent, China Merchants Bank, and was registered and established in June 2020. , "Based in China, facing the world", is my country's first foundation in the field of open source.
OpenHarmony is positioned as an open-source distributed operating system for all scenarios. Each manufacturer can obtain code from the "Open Atom Open Source Foundation" on an equal footing, and make products according to different business requirements.
According to the introduction, OpenHarmony creatively proposed the concept of adapting multiple terminal forms based on the same set of system capabilities on the basis of the traditional single-device system capabilities and supports operation on multiple terminal devices. The first version supports 128K-128M devices. Run, the developer will get the simulator, SDK package, and IDE tools.
It is said that the method of flashing OHOS for the Raspberry Pi this time is not too difficult. He directly uses the Raspberry Pi Linux rpi-5.10.y kernel and then compiles the OHOS 3.0 file system to supplement the missing files in Linux.
At present, OHOS seems to adopt the kernel→DRM→libdrm→wayland→weston model, so the DRM of the Raspberry Pi is normal, and the ecology of the Raspberry Pi is relatively open, and the information is easy to obtain, so overall it is not too difficult, just The root file system of OHOS uses Toybox, which is not friendly to most tools.
Raspberry Pi 4B is equipped with a Broadcom BCM2711 processor, 28nm process, integrated quad-core A72 1.5GHz, built-in GPU frequency is 500MHz, performance is improved by nearly 50% compared with the previous generation Raspberry Pi 3B+, with 1/2/4GB LPDDR4 Memory, Gigabit network card, Bluetooth 5.0, USB 3.0 interface, microHDMI interface.
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