Some contents related to cmsis-rtos

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CMSIS The main contents are as follows ：

• CMSIS-RTOS： It is mainly used for RTOS Of API, Software layer consistent with middleware and library components .

• CMSIS-DSP：Arm For various Cortex-M The processor core is optimized and enriched DSP Collection of functions .

• CMSIS-Driver： The interface can be used in many microcontroller families .

• CMSIS-Pack： Defines a package that contains software components .

• CMSIS-SVD： The detailed view of the device peripherals can be displayed through the current register status .

• CMSIS-DAP：Cortex Debug access port （DAP） Standardized interface for .

• CMSIS-NN： A collection of efficient neural network cores .

meanwhile , We are using STM32CubeMX To configure FreeRTOS There is a CMSIS_V1 and CMSIS_V2 The option to , Some readers asked a question ：CMSIS-RTOS What is it? ？CMSIS_V1 and CMSIS_V2 What's the difference ？

Now let's briefly share about CMSIS-RTOS The content of .

CMSIS An introduction to the

Cortex Microcontroller software interface standard （Cortex Microcontroller Software Interface Standard） yes ARM A set of standards followed by some compiler manufacturers and semiconductor manufacturers , By ARM Specifically 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 some special peripherals , In order to reduce the cost of money and time brought by the transplantation of chips and development tools .

As long as it's all based on Cortex Chip , The code is reusable .CMSIS yes Cortex-M The vendor independent hardware abstraction layer of the processor family . Use CMSIS A consistent and simple software interface can be implemented for processors and peripherals , So as to simplify the reuse of software 、 Shorten the learning process for new microcontroller developers , And shorten the time to market for new devices .

CMSIS The main contents are as follows ：

• CMSIS-RTOS： It is mainly used for RTOS Of API, Software layer consistent with middleware and library components .

• CMSIS-DSP：Arm For various Cortex-M The processor core is optimized and enriched DSP Collection of functions .

• CMSIS-Driver： The interface can be used in many microcontroller families .

• CMSIS-Pack： Defines a package that contains software components .

• CMSIS-SVD： The detailed view of the device peripherals can be displayed through the current register status .

• CMSIS-DAP：Cortex Debug access port （DAP） Standardized interface for .

• CMSIS-NN： A collection of efficient neural network cores .

CMSIS-RTOS Did you do it ？

as everyone knows , Real time operating system is the cornerstone of embedded field , There are many optional embedded operating systems , Such as FreeRTOS、μCOS、RT-Thread、RTX、ThreadX、uLinux etc. .

CMSIS-RTOS yes ARM The company is a unified operating system 、 Standard software interface of operating system released to lower the threshold of embedded system . Popular speaking ,CMSIS-RTOS Will the operating system （ Whether it's FreeRTOS still RTX etc. ） Shield up , And then provide the CMSIS-RTOS Interface functions call... To the end user .

So since , End users only need to learn CMSIS-ROTS that will do , So as to reduce the learning threshold .（ at present FreeRTOS and RTX Be able to support CMSIS-RTOS, Others RTOS Not yet adapted ）.

CMSIS-RTOS It is a general purpose of real-time operating system API. It provides a standardized programming interface , It just encapsulates RTX/Embos, It may also be encapsulated in the future μCOS、ThreadX Wait for the third party RTOS.

As mentioned at the beginning , stay STM32CubeMX To configure FreeRTOS There is one CMSIS_V1 and CMSIS_V2 The option to ：

meanwhile ,CMSIS-ROTS Also on the Keil Of RTX Made good support , If you install it Keil MDK, stay CMSIS Under the table of contents , You'll find that RTX Source code ：

By the way ：RTX And μCOS、ThreadX Such as these RTOS equally , It's also free and open source （ The source code in CMSIS Under the table of contents , You can check it yourself ）, follow Apache2.0 Open source licenses .

Add

CMSIS RTOS yes ARM Now the hot Internet of things operating system mbedOS The basis of , Understand this RTOS API, More conducive to RTOS Bottom 、IC Bottom software development .

Here is a recommended use of CMSIS-RTOS Tutorial on creating threads ：

https://blog.csdn.net/ichamber/article/details/53116253

Portable to many ,RTOS, Make the software template 、 middleware 、 Libraries and other components can work on supported RTOS System （ST For FreeRTOS Did CMSIS-RTOS Underlying support , therefore , You'll see STM32CubeMX Yes CMSIS_V1 and CMSIS_V2 The option to ）.

More about CMSIS-RTOS The content of , See the official tutorial ：

https://www.keil.com/pack/doc/CMSIS/RTOS2/html/rtos_api2.html

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