1. Description and Code Implementation Implement a table-driven key state machine that can be coded according to the steps of state enumeration definition, event enumeration definition, callback function types, state table structure, state table definition, and state machine processing function.Table-driven design: centralizes the mapping of <span>"state – event – next state – callback"</span> in a … Read more
In C++, to implement event dispatching, function pointers need to be bound for event callback dispatching. In C++17, the class template std::function was introduced, which serves as a general-purpose polymorphic function wrapper. With it, flexibility is greatly enhanced, allowing for an easily extensible event callback mechanism through simple encapsulation. The specific implementation is as follows: … Read more
In C, a function pointer is a special type of pointer that can store the address of a function. With function pointers, we can flexibly call different functions, thereby enhancing the flexibility and scalability of the program. This article will introduce the basic definition of function pointers, how to use them, and some common application … Read more
Function pointers are a powerful feature in the C programming language, allowing programs to pass, store, and dynamically call functions as data, providing great flexibility in code design. This article will systematically explain function pointers from their definition syntax, basic usage to advanced applications (callback mechanisms, state machines, plugin systems, object-oriented simulation), combining core insights … Read more
Osprey Talks Microcontrollers • Source: Osprey Talks Microcontrollers The nRF5 SDK has updated the event callback mechanism starting from version 14, introducing the Observer Pattern to decouple different BLE layers from the callback functions for BLE events. This mechanism utilizes Flash sections, combining function calls in RAM with operations in Flash, which is a novel … Read more