串口1，485功能。

数据接收解析及数据库处理

packages/rs485-v1.06/SConscript

@@ -0,0 +1,9 @@
+from building import *
+
+cwd = GetCurrentDir()
+path = [cwd+'/inc']
+src  = Glob('src/*.c')
+ 
+group = DefineGroup('rs485', src, depend = ['PKG_USING_RS485'], CPPPATH = path)
+
+Return('group')