Embedded development learning is a continuous accumulation and summary of the process, from an embedded development engineer for us to summarize the 13 principles of embedded development learning, we may wish to refer to:
First, the law of redundancy
After the embedded system has enough redundancy, the system's "initial sensitivity" has little effect on its "final calculation result".
Second, the law of real-time
The result of embedded system not only relies on the correctness of the logical operation of the system, but also relies on the computational time of the result of the computation.
Third, the law of limited resources
Embedded computing requires not only a fast and consistent computation of the network, but also the ability of the system to execute code and data in an orderly manner, stored in a "common", "small" space.
Iv. Structural laws
For embedded systems, the trend of structural complexity indicates that a system structure is simpler and more effective (the [filtered]st is the best); The more complex the structure of B system is, the more stable (more complex are more stable).
Five, the principle of robustness
Embedded computing not only requires a quick and efficient calculation of the system, but also requires that the system can continue to function properly when some computational units are in error.
Vi. Principles of Conservation
If you want to retain a system function in an embedded system, it is best to regard all other functions as "sacred and inviolable"; The function of the system is removed (extinct) or generated (invaded), which will result in a significant change in the overall (cluster) structure and its dynamic performance.
VII. Organizational Principles
Embedded Internet (embedded Internet) The most important is often not the characteristics of individual devices in the network, but in the network of the overall order, that is, network order. In a high redundancy network, the single function of the device can no longer constitute the main factor affecting the overall performance of the system, and the main function is all the nodes and their linked characteristics.
Eight, the Law of network
The network of embedded Internet nodes, which is composed of a group of devices interacting with each other, has no significant relationship with the nature of individual nodes. Embedded technology Training QQ754634522
Nine, the principle of simplicity
When an embedded system is simplified, the interaction between the remaining functions of the system becomes more and more strong; When the function of the system is simplified, the probability of the success of an alien intruder becomes larger and greater.
Ten, the Law of immunity
The immune system of the embedded Internet (embedded Internet) should be a humanoid mechanism, the immune function is a "feedforward" system, so the system should have foresight ability, so as to "(small) poison attack (large) poison".
Xi. the law of fusion
Embedded Internet is a complex network, the complex network structure with a simple "composition" to resolve, so that the system can be isolated "composition" to interpret the "whole", or let the system can be "node" to express "global."
12, the law of price
If system A is a system B embedded system, B (a), then system A should not cost more than 10 of the cost of system B, while system B (a) should cost more than the sum of system A and system B costs, and system B (a) should be 30 more cost-effective.
13, the message of the law
Guaranteed Search message: It has strict time-sensitive or basic normal system * requirements, such messages require a time guarantee from the system. That is, once the activities or tasks that are caused by such messages are executed, their time limits will be guaranteed by the system at the specified time interval. Best effect message: It has a typical soft time qualification, that is, its time limit is defined by the time series of the activity or the task itself, and it can meet the requirement of time qualification without system guarantee. Technical website: edu118.com Shenzhen-Guangzhou-Zhengzhou professional embedded training QQ914865590
|
