Every day, we use a large number of ASIC (application specific integrated circuits) devices. ASICs can be found in everything from an automated mosquito repelling machine to a television remote control. Each one contains a distinct chipset or circuit that performs a certain function. The C language is not directly used to program these devices. Due to the fact that C is a high-level programming language. And because it necessitates more sophisticated circuits, implementing it directly will be more expensive. As a result, we program ASIC devices using assembly languages. Assembly languages are nothing more than C extension libraries created by various industry organizations. To give you an example, in C language, if you need to save an information bit, you just write it to a memory address, however in assembly language, you must first write it to a specific register.
When programming a device or operating system, we try to keep the operational complexity as low as possible so that we can readily implement it in hardware. As a result, we use the RISC algorithm, which is less complicated than other OS programming (assembly) languages. Although many alternative assembly languages have fewer instructions and consume less memory, they are more complex. As a result, we concentrate on fewer complex algorithms so that we can simply implement them at the hardware level.
C is used to write operating systems, such as Linux. The Windows operating system and the majority of apps are written in C, C++, or C#. C is the de facto standard in the realm of programmed devices.
We can't think of an embedded system that doesn't need C. The most prevalent programming languages in the embedded industry for developing various types of assembly languages to command devices.
Microchips or chipsets are now being developed for usage in mobile phones. The CPU (microcontroller), GPU (graphic processing unit), DSP, network module, and memory in placed in a single chip (occasionally memory is placed outside the microchip using the north-bridge bus). You're aware of the importance of C for microcontrollers. C and C++, on the other hand, are the most popular programming languages for graphics processing units (GPU). Network module and memory - all can be programmed with assembly languages developed from C.