if defined

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C-language Conditional compilation #if, #elif, #else, #endif, #ifdef, #ifndef_Embeder__C语言

Some programs are debugging, compatibility, in situations like platform porting, you might want to generate a different software by simply setting some parameters, which, of course, can be done with variable settings, write all the possible code,

Conditional compilation of C language # If, #elif, #else, #endif, #ifdef, #ifndef

Some programs in debugging, compatibility, platform porting and so on may want to create a different software by simply setting some parameters, this can of course, through the variable settings, all the code can be used to write in the

Transplantation of network card dm9000e Based on S3C2440 embedded Linux

The steps for porting A dm9000e Nic to mini2440 are as follows: I. view the circuit diagram On the basis of porting the Linux-2.6.29.1 kernel and root file system on the mini2440 Development Board, transplantation of network card dm9000e, because

Content in/sys/bus/I2C/devices and i2c_board_info struct

I2C devices in the system can be found in the/sys/bus/I2C/devices directory, as follows: View plaincopy to clipboardprint?# Ls0-00340-00300-00110-0058# Ls0-00340-00300-00110-0058 These devices exist in the system. How did these devices come from? In

ZSTACK-CC2530-2.5.1A Main Code Analysis summary--understand Zstack-osal's principle and thought

First, download zstack-cc2530.2.5.1ahttp://download.csdn.net/detail/thanksgining/8328925After download:Second, installation zstack-cc2530.2.5.1aAfter installation:Components : As the name implies, this is a library file, which puts some

Front-end Basic tutorial-jquery Easyui Easyloader Instances

   Brother even front-end HTML5 training to share Easyloader instances of -jquery Easyui To move the panel to other position  $ (' #p '). Panel (' move ', {  LEFT:100,  top:100  });Property:  The title, type is string, is the caption text that is

Ecshopinit. PHP file analysis _ PHP Tutorial

Ecshopinit. php file analysis. 1. ecshopinit. php file analysis 2 .? Php3.4. ** 5. * ECSHOP front-end public file 6.*7. * All rights reserved. 1. ecshop init. php file analysis 2. 3. 4 ./** 5. * ECSHOP front-end public files 6 .* ====================

How to interpret the first loading of a PHP page

How to interpret how PHP pages load php for the first time If (! Ispostback) { ..... } To determine whether the page is loaded for the first time! Reply to discussion (solution) Why is this decision? Php and. net are different. Session You

openal-1.13 static compilation (MINGW32)

1.cmakelists.txt set (Libtype SHARED) changed to set (Libtype STATIC) 2.include/al/al.h Delete dllexport 3.include/al/ alc.h Delete dllexport 4.alc/bs2b.c bs2b_set_level change to Bs2b_set_level2 ... 5.openal32/include/bs2b.h Bs2b_set_level changed

How to interpret a PHP page for the first time loading

How PHP looks like. NET. if (!ispostback) { ..... } To see if the page was loaded for the first time! Reply to discussion (solution) Why do you make this judgment? PHP is not the same as. Net. Session Should be able to use cookies to

Port linux2.6.18 to ARM9.

If you don't talk nonsense, let's talk about how to change it, (1) arch/ARM/mach-s3c2410/common-smdk.c Static struct s3c2410_platform_nand smdk_nand_info = { . Tacls = 0,. Twrph0 = 30,. Twrph1 = 0,. Nr_sets = array_size (smdk_nand_sets ),. Sets =

Ecshop init. php file Analysis

1. ecshop init. php file Analysis2. 3.4 ./**5. * ECSHOP front-end public files6 .*========================================================== ===========================================7. * copyright: 2005-2008 Shanghai shangpi Network Technology Co.,

Dark Horse programmer--C Language macros

Introduction to Macros 1. C language before compiling the source program, will be a number of special pre-processing instructions (such as the previous use of the # include file contains instructions), a new source program (this process is called

Transplantation Study Notes of dm9000 driver on mini2440

Dm9000Driver inMini2440Transplant Study Notes on I want to know the principle of porting and modifying the dm9000, So I analyzed the timing diagram and pin connection. First, let's take a look at the connection between the dm9000 pin and the mini2440

Uboot Debug Summary (Freescale Platform for example)

Uboot EntranceArch/arm/lib/crt0. S#include #include #include /* * This file handles the Target-independent stages of the u-boot * start-up where a C runtime environment is needed. Its entry point * is _main and is branched to from the target ' s

Timer settings in uboot

In uboot, the timer is not initialized in the uboot assembly part, but in C. In the void start_armboot (void) function of the C entry function, call [cpp] typedef int (init_fnc_t) (void) using the following code ); [html] init_fnc_t * init_sequence [

DM9000 Drive on the MINI2440 transplant Learning notes

I want to know about the transplant modification principle of DM9000, so I analyzed the sequence diagram and PIN connection. First, take a look at DM9000 pins and MINI2440 pin connections. DM9000 MINI2440 Function DescriptionSD0 DATA0 Data Signal|

"Learning Notes", "C Language" conditional compilation

1. The concept of conditional compilationIn many cases, we want some of the code in the program to compile only if certain conditions are met, otherwise it does not participate in compilation (only the code that participates in the compilation will

. NET calls Win32 API

. NET call API declaration formatVB. NET[Vb] Declare Function Lib () As  'Example:Declare Function FormatMessage Lib "kernel32" Alias "FormatMessageA "(_ByVal dwFlags As Integer, ByRef lpSource As Object ,_ByVal dwMessageId As Integer, ByVal

# Ifdef, # ifndef, # define, # endif Parsing

When we look at some open-source code, we often see the following scenarios:# If defined (_ PTHREADS )&&! Defined (_ NOTHREADS)# Define _ STL_PTHREADS# Endif # If defined (_ UITHREADS )&&! Defined (_ PTHREADS )&&! Defined (_ NOTHREADS)# Define _ STL_

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