Use in main routine : void main() { Delay(); // Delay 3000 Machine Cycles } => For easier use, i should write a DelayMCs() Macro, eg : #define DelayMCs(Interval) //Code Here??? Then, use this Macro like this : void main() { DelayMCs(7000); } => That's my idea. ...
I use KeilC uVision4 for 89C51 MCU. I use "Inline ASM Code", like this : void main() { #pragma ASM MOV R7, #( 80000/40000 ) #pragma ENDASM } -
如下: https://stackoverflow.com/questions/4364971/and-in-macros https://stackoverflow.com/questions/1644868/define-macro-for-debug-printing-in-c #define INT64CONST(x) (x##L) #define UINT64CONST(x) (x##UL) #define LOCAL_FCINFO(name, nargs) \ /* use union with FunctionCallInfoBaseData ...
我们可以使用宏去定义常量,当然我们也可以利用宏定义中运算 #include <stdafx.h> #include <stdio.h> #include <conio.h> #include <stdlib.h> #include <string.h> #define MULTIPLY(val1, val2)((val1)*(val2)) //这里定义了一个乘法运算的宏 void main() { int result; result = MULTIPLY (2,...
2. 通过cmake添加macro宏定义 出入到源文件,例如在编译opencv/caffe的时候,我们通过cmake -DUSE_CUDA=ON/OFF来确定,是否使用cuda. 问题cmake中如何实现上述两个功能的呢? 至于问题1: 我们可能想到直接在头文件中定义,这样也可以,但是如果直接在cmake中定义,然后传递给程序读取生成更加灵活。 至于问题2: 可以在...
When a macro parameter is used with a leading ‘#’, the preprocessor replaces it with the literal text of the actual argument, converted to astring constant. "##" 代表和一个符号相连接,符号可以是变量,或另一个宏符号。 就相当于如下: ...
Quick update - turns out use of defined in macro expressions is too deeply embedded in the way Marlin is built for changing that to be viable. For reference, the rule that's broken according to the SEI CERT C Coding Standard is section 6.10.3, paragraph 11 of ISO/IEC 9899:2011. The ...
宏(Macro)本质上就是代码片段,通过别名来使用。在编译前的预处理中,宏会被替换为真实所指代的代码片段,即下图中 Preprocessor 处理的部分。 C/C++ 代码编译过程 图片来自 ntu.edu.sg 根据用法的不同,分两种,Object like 和 Function like。前者用
A macro in C language is a piece of code which has been assigned a name. When the name is used anywhere in the program, the macro value is replaced before the compilation of the program. How to write a macro in C language is explained in this article.
Compiler warning (level 1) C5048 Use of macro 'macroname' may result in non-deterministic output Compiler warning (level 1) C5049 'string': Embedding a full path may result in machine-dependent output Compiler warning (level 1) C5050 Possible incompatible environment while importing module 'mod...