#define SBUS_RX_BUF_NUM 36u

#define SBUS_RX_BUF_NUM＊＊＊US_RX_BUF_NUM是常量的名称，36u是常量的值。

这个宏定义的作用是为了方便在代码中使用这个常量值，可以通过使用SBUS_RX_BUF_NUM来代替具体的数值36，提高代码的可读性和可维护性。

在代码中，可以使用SBUS_RX_BUF_NUM来表示36，例如：
int buffer[SBUS_RX_BUF_NUM];
这样就定义了一个长度为36的整型数组。

相关问题

#define sbus_Rx pin 19 #define sbus_TX PIN 15

这两行代码是C语言中的宏定义，用于定义两个常量。

第一行代码：`#define sbus_Rx pin 19`，表示定义了一个名为`sbus_Rx`的常量，其值为`pin 19`。

第二行代码：`#define sbus_TX PIN 15`，表示定义了一个名为`sbus_TX`的常量，其值为`PIN 15`。

这两行代码通常用于为硬件引脚编号提供易于理解的名称，以便在程序中引用。

#define Wide 1024 #define Hight 640 #define Wide_map (Wide*5) #define Hight_map (Hight*5) #define Food_num 1888 #define Enemy_num 888

These are preprocessor directives (macros) commonly used in C or C++ programming. Here's what each macro does:

- `#define Wide 1024` : This defines a constant named "Wide" with a value of 1024, probably referring to the width of an image or a rectangular area in pixels.
- `#define Hight 640` : Similarly, "Hight" is defined as a constant with a value of 640, likely the height of the same image or area.
- `#define Wide_map (Wide*5)` : The "Wide_map" macro is a shorthand for multiplying the "Wide" constant by 5, which could represent a resizing or scaling factor for the width or a map data structure.
- `#define Hight_map (Hight*5)` : Same as above, but for the height, multiplying the "Hight" constant by 5.
- `#define Food_num 1888` : "Food_num" is a constant that holds the value 1888, possibly representing the number of food items in a game or simulation.
- `#define Enemy_num 888` : "Enemy_num" is another constant, indicating the number of enemies, also in a game context.