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Modbus硬件控制02——modbus继电器 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...:26 编辑
一、概述
该模块是一款以专用集成电路为核心的经济型MODBUS-485继电器模块,实现了标准MODBUS-485通信功能。它可以与9V，12V或24V电压配合使用。本模块支持所有常见波特率、停止位和校验位的组合，并可任意设置MODBUS地...
clang: how to list supported target architectures?
...t;vendor>-<sys>-<abi>, where:
arch = x86, arm, thumb, mips, etc.
sub = for ex. on ARM: v5, v6m, v7a, v7m, etc.
vendor = pc, apple, nvidia, ibm, etc.
sys = none, linux, win32, darwin, cuda, etc.
abi = eabi, gnu, android, macho, elf, etc.
and you can even fine tune specify a target cp...
Why is nginx responding to any domain name?
...me domain_1;
[...]
}
server {
server_name domain_2;
[...]
}
etc
** EDIT **
It seems some users are a bit confused by this example and think it is limited to a single conf file etc.
Please note that the above is a simple example for the OP to develop as required.
I personally use ...
How to permanently set $PATH on Linux/Unix? [closed]
...st use a specific shell syntax and export or set commands.
System wide
/etc/environment List of unique assignments, allows references. Perfect for adding system-wide directories like /usr/local/something/bin to PATH variable or defining JAVA_HOME. Used by PAM and SystemD.
/etc/environment.d/*.co...
Windows、Linux开放指定端口 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...认设置即可：
设置后立即生效。
Linux篇：
vi /etc/sysconfig/iptables
添加一行：
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
重启防火墙：
service iptables restart
Windows Linux 端口 防火墙
PHP 安装 ZIP 扩展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...php.ini文件末尾加上extension=zip.so
我的php.ini在/usr/local/php/etc下（找到自己安装php的php.ini文件）
extension=zip.so
最后再重启下php即可。
-------------------------------------
解决phpize 命令不存在：
可使用 which 命令查找 phpize 的...
How to implement a rule engine?
... right);
}
}
Note that I used 'GreaterThan' instead of 'greater_than' etc. - this is because 'GreaterThan' is the .NET name for the operator, therefore we don't need any extra mapping.
If you need custom names you can build a very simple dictionary and just translate all operators before compil...
No ConcurrentList in .Net 4.0?
...Add and provide random read-only access by index (but no Insert, RemoveAt, etc., and also no random write access).
This was the goal of my ConcurrentList<T> implementation. But when I tested its performance in multithreaded scenarios, I found that simply synchronizing adds to a List<T> ...
How to include package data with setuptools/distribute?
... ('bitmaps', ['bm/b1.gif', 'bm/b2.gif']),
('/opt/local/myproject/etc', ['myproject/config/settings.py', 'myproject/config/other_settings.special']),
('/opt/local/myproject/etc', [os.path.join('myproject/config', 'cool.huh')]),
#
('/opt/local/myproject/etc', [os.path.join('m...
Where can I learn how to write C code to speed up slow R functions? [closed]
...simpler code, less boilerplate, no PROTECT/UNPROTECT, no memory management etc pp. Doug Bates just yesterday stated that he finds C++ and Rcpp to be much more like writing R than writing C++. YMMV and all that.
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