diff --git a/appmain/xmodem b/appmain/xmodem
deleted file mode 100644
index cfa2142..0000000
--- a/appmain/xmodem
+++ /dev/null
@@ -1,115 +0,0 @@
-package com.proxgrind.chameleon.xmodem;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import com.proxgrind.chameleon.posixio.PosixCom;
-import com.proxgrind.chameleon.utils.tools.HexUtil;
-
-/**
- * @author DXL
- * 抽象XModem，定义协议的基本特性，通用动作!
- */
-public abstract class AbstractXModem {
-
-    protected String LOG_TAG = this.getClass().getSimpleName();
-
-    // 结束
-    protected byte mEOT = 0x04;
-    // 应答
-    protected byte mACK = 0x06;
-    // 重传
-    protected byte mNAK = 0x15;
-    // 无条件结束
-    protected byte mCAN = 0x18;
-
-    // 以128字节块的形式传输数据
-    protected int mBlockSize = 128;
-    // 最大错误（无应答）包数
-    protected int mErrorMax = 10;
-
-    // 通信接口,用于读取串口数据
-    protected PosixCom mCom;
-
-    public AbstractXModem(PosixCom com) {
-        this.mCom = com;
-    }
-
-    /**
-     * @param sources 字节来源，可以是InputStream的任何有效实现!
-     * @return 传输结果!
-     */
-    public abstract boolean send(InputStream sources) throws IOException;
-
-    /**
-     * @param target 字节去向，可以是OutputStream的任何有效实现!
-     * @return 传输结果!
-     */
-    public abstract boolean recv(OutputStream target) throws IOException;
-
-    /**
-     * 刷新数据,进行剩余字节发送!!
-     *
-     * @throws IOException 异常
-     */
-    protected void flush() throws IOException {
-        mCom.flush();
-    }
-
-    /**
-     * 获取数据,每次在超时值内读取一个字节!
-     *
-     * @return 数据
-     * @throws IOException 异常
-     */
-    protected byte read(int timeout) throws IOException {
-        byte[] b = new byte[1];
-        mCom.read(b, 0, 1, timeout);
-        return b[0];
-    }
-
-    /**
-     * 发送数据
-     *
-     * @param data 数据
-     * @return 发送成功的字节长度!
-     * @throws IOException 异常
-     */
-    protected int write(byte data, int timeout) throws IOException {
-        byte[] b = {data};
-        return mCom.write(b, 0, 1, timeout);
-    }
-
-    /**
-     * 发送数据
-     *
-     * @param dataByte 数据
-     * @param checkSum 校验和
-     * @return 发送成功的字节
-     * @throws IOException 异常
-     */
-    protected int write(byte[] dataByte, byte[] checkSum, int timeout) throws IOException {
-        return write(HexUtil.bytesMerge(dataByte, checkSum), timeout);
-    }
-
-    /**
-     * 发送数据
-     *
-     * @param dataByte 数据
-     * @return 发送成功的字节
-     * @throws IOException 异常
-     */
-    protected int write(byte[] dataByte, int timeout) throws IOException {
-        return mCom.write(dataByte, 0, dataByte.length, timeout);
-    }
-
-    /**
-     * 取消传输。使停止!
-     *
-     * @param timeout 超时值!
-     */
-    public void cancel(int timeout) throws IOException {
-        write(mCAN, timeout);
-    }
-}