update go & PLC

lcp0578 · lcp0578 · commit aadde0701c25 · 2019-07-10T22:50:59.000+08:00
diff --git a/README.md b/README.md
@@ -421,4 +421,6 @@
 	- [PostgreSQL for mac](src/PostgreSQL/mac.md) mac下安装及使用
 71. [ICU4C VS ICU4J](src/ICU/README.md)
 72. [VS Code](src/VSCode/README.md)
-	- [go 环境配置](src/VSCode/go.md)
+	- [go 环境配置](src/VSCode/go.md)
+73. [PLC](src/PLC/README.md)
+	- [西门子 S7-200SmartPLC](src/PLC/Siemens.md)
diff --git a/src/Go/StandardLibrary/sync.md b/src/Go/StandardLibrary/sync.md
@@ -1 +1,3 @@
-## sync
+## sync
+> https://studygolang.com/articles/12972
+> https://studygolang.com/articles/319
diff --git a/src/Go/for-select.md b/src/Go/for-select.md
@@ -1,4 +1,6 @@
 ## for select
+> https://wudaijun.com/2017/10/go-select/
+
 - return 退出
 
 		package main 
diff --git a/src/Go/portability.md b/src/Go/portability.md
@@ -0,0 +1,5 @@
+## portability 可移植性
+> https://tonybai.com/2017/06/27/an-intro-about-go-portability/
+> https://www.jisec.com/application-development/753.html 交叉编译
+> CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build main.go
+> https://tonybai.com/2014/10/20/cross-compilation-with-golang/
diff --git a/src/Go/tcp.md b/src/Go/tcp.md
@@ -0,0 +1,2 @@
+## tcp 黏包问题
+> https://juejin.im/post/5d220f7b6fb9a07ec7553da4
diff --git a/src/PLC/README.md b/src/PLC/README.md
@@ -0,0 +1,2 @@
+## PLC
+- [西门子 S7-200SmartPLC](Siemens.md)
diff --git a/src/PLC/Siemens.md b/src/PLC/Siemens.md
@@ -0,0 +1,5 @@
+## 西门子 S7-200SmartPLC
+> https://blog.csdn.net/u014780302/article/details/52796187
+> https://github.com/falionname/Siemens
+> https://github.com/netdata-be/libnodave
+> https://github.com/robinson/gos7

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+## tcp 黏包问题`
	`2`	`+> https://juejin.im/post/5d220f7b6fb9a07ec7553da4`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+## PLC`
	`2`	`+- [西门子 S7-200SmartPLC](Siemens.md)`