添加对hmi屏幕的支持，赋码仪按键按下时发送赋码请求

interface/codec_m4.cpp

@@ -69,7 +69,7 @@ myarray codec_m4::decode(int &srcAddr, int &dstAddr, int &cmd, myarray data)
 //  qDebug("m4 recv:%s",data.toHex(' ').data());
   if (packCheck(data))
   {
-    return data.mid(2);
+    return data.mid(2,data[1]);
   }
   return myarray();
 }

interface/if_uart.cpp

@@ -60,7 +60,13 @@ InterFace *if_uart_hmi()
   static InterFace *if_ = nullptr;
   if (if_ == nullptr)
   {
-    if_ = new if_uart("/dev/ttySTM1", 115200);
+    char *dev=nullptr;
+    if(syscfg()->device_type=="hmi_coder"){
+      dev="/dev/ttySTM3";
+    }else{
+      dev="/dev/ttySTM1";
+    }
+    if_ = new if_uart(dev, 115200);
     // QTimer::singleShot(0, if_, &InterFace::init);
     if_->init();
   }