优化项目结构

config.go

@@ -0,0 +1,14 @@
+package main
+
+type Config struct {
+	portName    string
+	baudRate    int
+	dataBits    int
+	stopBits    int
+	outputCode  string
+	inputCode   string
+	endStr      string
+	enableLog   bool
+	logFilePath string
+	parityBit   int
+}