diff --git a/mainwindow.cpp b/mainwindow.cpp
index e8a9c1e..08f2c99 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -521,8 +521,10 @@ void MainWindow::on_pushButton_12_clicked()
             QThread::msleep(10); // 延时10毫秒
             dacHandler->setDACReg(drvUart,cmd2);
             QThread::msleep(10); // 延时10毫秒
-            QByteArray revData = dacHandler->getDACReg(drvUart,cmd3);
-            onLogPrint(" [UART] <-- Read Reg data is :"+revData.toHex(' '));
+            QByteArray tmp = dacHandler->getDACReg(drvUart,cmd3);
+            QByteArray revData = tmp;
+            revData.detach();
+            onLogPrint(" [UART] <-- Read Reg data is :"+tmp.toHex(' '));
             if(revData.length()>=7){
                 regData[i-1]=revData;
             }else{