"If life is just like the first sight" -- risc-v

mention RISC-V, One word we have to mention is Instruction set architecture (ISA).

that , What is meant by “ISA”,ISA It can be called CPU Soul , Sometimes referred to as “ framework ” Otherwise known as “ Processor architecture ”.

  Above the ISA Made a detailed description , I won't repeat it here .

With instruction set architecture , Different processor hardware implementation schemes can be used to design processors with different performance . The specific hardware implementation scheme of the processor is called Microarchitecture (Microarchitecture).

RISC-V( English is read as “risk-five”), Is a new instruction set architecture .RISC-V The framework is mainly composed of several professors from the University of California, Berkeley 2010 The invention of . The reason why Berkeley developers invented a new instruction set architecture , Instead of using mature X86 perhaps arm framework , Because these architectures have been developed for many years , Become extremely complex and miscellaneous , And there are high patent and architecture licensing problems . therefore ,RISC-V Architecture is a new , Simple, open and free instruction set architecture .

 

Briefly introduce some CPU principle ：

1. Classic five stage assembly line

Flow of an instruction ： Fingering > decoding > perform > Visiting and depositing > Write back to

Simply mention a concept ： Pipeline depth

Deeper and deeper assembly lines ： Pursuing high performance

Shallower and shallower assembly lines ： Pursue low power consumption

2.CPU Data access

 

About match

Competition questions ： Based on hummingbird E203 RISC-V Intelligent recognition of kernel SoC Design and application system development

Content ： Open source hummingbird based on xinlai Technology E203 Demo SoC（e203_hbirdv2） Expand , On the limited programmable logic platform, we build a..., which is oriented to the application field of intelligent recognition SoC, And then complete the actual application system development . It is required to build SoC In order to improve the overall performance of the system , The application system realized is innovative 、 Practicality and market application prospects .

Make complaints about it ： I can't borrow & It's too persuasive to buy a board

 （Nuclei MCU200T, The price is 2499）

 （Nuclei DDR200T, The price is 4999）

Finally, with the support of Wang Xuechang in the Laboratory , Bought a development board

 （ Vinci pro 35T, The price is 1526）

Familiar with board , The biggest headache is still E203 soc Transplant the kernel to the board （ Online tutorials are almost 0）

The migration tutorial will be sent later

Sharing is only for learning and communication , I hope the big guys will not hesitate to give me advice 🥰