Is it necessary to know C to develop single-chip microcomputers?

　　Assembly language is a symbolic language that uses text mnemonics to represent machine instructions. It is the language closest to machine code. Its main advantages are that it takes up less resources and has high program execution efficiency. However, different CPUs may have different assembly languages, so it is not easy to port.

　　For the 8-bit MCU with RISC architecture that is currently widely used, its internal ROM, RAM, STACK and other resources are limited. If it is written in C language, a C language instruction will become many machine codes after compilation, which may easily cause problems such as insufficient ROM space and stack overflow. In addition, some microcontroller manufacturers may not be able to provide C compilers. In assembly language, one instruction corresponds to one machine code, and it is clear what action is performed at each step. In addition, the program size and stack call status are easy to control, and debugging is also more convenient. Therefore, in the development of microcontrollers with fewer resources, we still recommend the use of assembly language.

　　C language is a compiled programming language that takes into account the characteristics of multiple high-level languages ​​and has the functions of assembly language. C language has rich library functions, fast computing speed, high compilation efficiency, good portability, and can directly control system hardware. C language is a structured programming language that supports the top-down structured programming technology widely used in current programming. In addition, C language programs have a complete module program structure, which provides a strong guarantee for the use of modular programming methods in software development. Therefore, using C language for programming has become a mainstream in software development. Using C language to write target system software will greatly shorten the development cycle, significantly increase the readability of the software, and facilitate improvement and expansion, thereby developing a larger system with more complete performance.

　　In summary, using C language for MCU programming is an inevitable trend in MCU development and application. Therefore, as a MCU developer who has comprehensive technology and is involved in large-scale software system development, it is best to master basic C language programming.