diff --git a/src/args_parse.rs b/src/args_parse.rs
index f5df5e5..0d66e0b 100644
--- a/src/args_parse.rs
+++ b/src/args_parse.rs
@@ -16,3 +16,57 @@ pub struct Args {
     #[clap(short, long, value_parser, default_value_t = 1)]
     pub dtr: u8,
 }
+
+//获取参数
+pub fn get_args() -> Args {
+    match Args::try_parse(){
+        Ok(a) => a,
+        Err(e) if e.kind() == clap::error::ErrorKind::DisplayHelp => Args::parse() ,
+        Err(e) if e.kind() == clap::error::ErrorKind::DisplayVersion => Args::parse() ,
+        _ => {
+            //没给参数，手动获取下
+            let mut buff = String::new();
+            let mut a = Args{
+                port: String::new(),
+                baud_rate: 115200,
+                rts: 0,
+                dtr: 1,
+            };
+            println!("your serial ports list:");
+            let port_list = serialport::available_ports().unwrap();
+            port_list.iter().for_each(|p| println!("{}",p.port_name));
+            println!("please select your serial port (default first port if exist):");
+            std::io::stdin().read_line(&mut buff).expect("read_line error!");
+            a.port = if buff.trim().len() == 0 {
+                if port_list.len() > 0{
+                    port_list[0].port_name.clone()
+                }
+                else{
+                    panic!("no port found!")
+                }
+            } else {
+                buff.trim().to_string()
+            };
+            buff.clear();
+
+            println!("please set a baud rate (default 115200):");
+            std::io::stdin().read_line(&mut buff).expect("read_line error!");
+            if buff.trim().len() != 0 {
+                a.baud_rate = buff.trim().parse().unwrap();
+            }
+            buff.clear();
+            println!("please set rts status (default 0, disable):");
+            std::io::stdin().read_line(&mut buff).expect("read_line error!");
+            if buff.trim().len() != 0 {
+                a.rts = buff.trim().parse().unwrap();
+            }
+            buff.clear();
+            println!("please set dtr status (default 1, enable):");
+            std::io::stdin().read_line(&mut buff).expect("read_line error!");
+            if buff.trim().len() != 0 {
+                a.dtr = buff.trim().parse().unwrap();
+            }
+            a
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 5c821d2..fb5ee89 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,80 +1,33 @@
-use std::io::{self, Write};
-
-use clap::Parser;
+use std::io::{self, Write, Read};
 mod args_parse;
-use args_parse::Args;
 
 fn main() {
-    let args = match Args::try_parse(){
-        Ok(a) => a,
-        Err(e) if e.kind() == clap::error::ErrorKind::DisplayHelp => Args::parse() ,
-        Err(e) if e.kind() == clap::error::ErrorKind::DisplayVersion => Args::parse() ,
-        _ => {
-            //没给参数，手动获取下
-            let mut buff = String::new();
-            let mut a = Args{
-                port: String::new(),
-                baud_rate: 115200,
-                rts: 0,
-                dtr: 1,
-            };
-            println!("your serial ports list:");
-            let port_list = serialport::available_ports().unwrap();
-            port_list.iter().for_each(|p| println!("{}",p.port_name));
-            println!("please select your serial port (default first port if exist):");
-            std::io::stdin().read_line(&mut buff).expect("read_line error!");
-            a.port = if buff.trim().len() == 0 {
-                if port_list.len() > 0{
-                    port_list[0].port_name.clone()
-                }
-                else{
-                    panic!("no port found!")
-                }
-            } else {
-                buff.trim().to_string()
-            };
-            buff.clear();
-
-            println!("please set a baud rate (default 115200):");
-            std::io::stdin().read_line(&mut buff).expect("read_line error!");
-            if buff.trim().len() != 0 {
-                a.baud_rate = buff.trim().parse().unwrap();
-            }
-            buff.clear();
-            println!("please set rts status (default 0, disable):");
-            std::io::stdin().read_line(&mut buff).expect("read_line error!");
-            if buff.trim().len() != 0 {
-                a.rts = buff.trim().parse().unwrap();
-            }
-            buff.clear();
-            println!("please set dtr status (default 1, enable):");
-            std::io::stdin().read_line(&mut buff).expect("read_line error!");
-            if buff.trim().len() != 0 {
-                a.dtr = buff.trim().parse().unwrap();
-            }
-            a
-        }
-    };
+    let args = args_parse::get_args();
     let mut port = serialport::new(args.port, args.baud_rate)
-        .timeout(std::time::Duration::from_millis(100)).flow_control(serialport::FlowControl::None)
+        .timeout(std::time::Duration::from_millis(10)).flow_control(serialport::FlowControl::None)
         .open().unwrap();
     port.write_request_to_send(args.rts != 0).unwrap();
     port.write_data_terminal_ready(args.dtr != 0).unwrap();
     //清屏
     print!("\x1bc");
     io::stdout().flush().unwrap();
+    let mut buff : [u8;4096] = [0;4096];
+    let mut read_buff = [0;4096];
     loop {
-        let mut buff : [u8;4096] = [0;4096];
         let len = match port.read(&mut buff) {
             Err(e) if e.kind() == std::io::ErrorKind::TimedOut => 0,
             e => e.unwrap(),
         };
+        let read_len = std::io::stdin().read(&mut read_buff).unwrap();
+        if read_len != 0 {
+            println!("read:{}",String::from_utf8_lossy(&read_buff[0..read_len]));
+            port.write(&read_buff[0..read_len]).unwrap();
+        }
         //没数据，不往下跑
         if len == 0 {
             continue;
         }
-        let s = String::from_utf8_lossy(&buff[0..len]).into_owned();
-        print!("{}",s);
+        io::stdout().write(&buff[0..len]).unwrap();
         io::stdout().flush().unwrap();
     }
 }