Mecol Studio - Huawei 14 day Hongmeng equipment development practical notes 3

One .OpenHarmony Quick start ：Hello_World

Two .OpenHarmony Quick start ： Lighten up LED

3、 ... and .OpenHarmony Introduction to compilation and construction

What is? Ninja？

stay Unix/Linux I usually use Makefile To control the compilation of code , however Makefile For larger projects, it is sometimes slow , Code compilation has become an excuse for programmers to relax . So this Google Our programmers are developing Chrome Because I can't stand it Makefile The speed of , I redeveloped a new tool to control compilation called Ninja, Ninja be relative to Makefile This set of tools pays more attention to compilation speed . except Chrome Now there's another one - Some other larger projects are also starting to use Ninja.

Four .OpenHarmony CMSIS Interface profile

What is? CMSIS-RTOS2 Interface ？

CMSIS yes Cortex Microcontroller software connection standard (Cortex Microcontroller Software Interface Standard) yes ARM A set of standards followed by some compiler manufacturers and semiconductor manufacturers , By ARM specially i Door for Cortex-M Standards proposed in the series . Under the agreement of this standard ,ARM And chip manufacturers will provide some general API Interface to access Cortex Kernel and one Some special peripherals , In order to reduce the cost of money and time brought by the transplantation of chips and development tools .

CMSIS-RTOS2 (CMSIS-RTOS API Version 2) yes ArmR CortexR-M General purpose of processor RTOS Interface . For needs RTOS Functional software components provide standardized API.

CMSIS-RTOS2 It is a general API, It's related to the bottom RTOS It's not about the kernel , Programmers writing applications call in user code. CMSIS-RTOS2 API function , It is more convenient to transfer applications from - - individual RTOS To another RTOS, Use CMSIS-RTOS2 API Middleware can also avoid a lot of unnecessary transplantation .