1 files changed, 160 insertions, 0 deletions
diff --git a/recipes-demo/de10-nano-qt-usb-gadget-app/files/dialog.cpp b/recipes-demo/de10-nano-qt-usb-gadget-app/files/dialog.cpp
new file mode 100644
index 0000000..6b64a5d
--- /dev/null
+++ b/recipes-demo/de10-nano-qt-usb-gadget-app/files/dialog.cpp
@@ -0,0 +1,160 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include "dialog.h"
+#include "ui_dialog.h"
+#include <QMessageBox>
+
+
+Dialog::Dialog(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::Dialog)
+{
+    ui->setupUi(this);
+
+    QString strText;
+    strText = "1. When USB gadget is enabled, the DE10-nano can work as an USB storage when it is connected to a Host PC. However, user's usb devices are required to plug into de10-nano after de10-nano linux boots. Otherwise, the usb devices will not be detected by the system.\r\n\r\n";
+    strText += "2. When USB gadget is disabled, an external USB device can be detected upon connecting to DE10-Nano before or after Linux boots up on DE10-Nano.\r\n\r\n";
+    strText += "Note: The system needs to reboot before the modified setting is applied to the system.";
+    ui->label_hint->setText(strText);
+
+
+
+    bool bEnable;
+    if (QueryCurrentSetting(&bEnable, false)){
+        if (bEnable)
+            ui->radioButton_Enable->setChecked(true);
+        else
+            ui->radioButton_Disable->setChecked(true);
+    }else{
+        ui->radioButton_Enable->setChecked(true);
+    }
+
+
+}
+
+Dialog::~Dialog()
+{
+    delete ui;
+}
+
+
+void Dialog::on_pushButton_Exit_clicked()
+{
+    qApp->quit();
+}
+
+void Dialog::on_pushButton_Apply_clicked()
+{
+    if (ui->radioButton_Enable->isChecked())
+        GadgetEnable(true);
+    else
+        GadgetEnable(false);
+
+}
+
+bool Dialog::GadgetEnable(bool bEnable){
+    bool bSuccess = false;
+    int res;
+    char szCommand[256], szInfo[256];
+
+    sprintf(szCommand, "systemctl %s de10-nano-gadget-init.service", bEnable?"enable":"disable");
+    res = system(szCommand);
+    if (res == 0)
+        bSuccess = true;
+
+    if (!bSuccess){
+        sprintf(szInfo, "Failed to configure USB gadget.\r\n(%s)", szCommand);
+        QMessageBox(QMessageBox:: Warning, "Error", szInfo, QMessageBox::Ok).exec();
+    }else{
+        sprintf(szInfo, "Configure USB gadget successfully.\r\n");
+        QMessageBox(QMessageBox::Information, "Information", szInfo, QMessageBox::Ok).exec();
+    }
+
+
+    return bSuccess;
+}
+
+
+
+void Dialog::on_pushButton_Current_clicked()
+{
+    // query current setting
+
+    ui->radioButton_Enable->setChecked(true);
+    bool bEnable;
+    if (QueryCurrentSetting(&bEnable)){
+        if (bEnable)
+            ui->radioButton_Enable->setChecked(true);
+        else
+            ui->radioButton_Disable->setChecked(true);
+    }
+
+}
+
+bool Dialog::QueryCurrentSetting(bool *bEnable, const bool bShowError){
+    bool bSuccess = false;
+    int res;
+    char szFilename[] = "gadget.log";
+    char szCommand[256], szInfo[256];
+
+    remove(szFilename);
+    //if (res == 0){
+        sprintf(szCommand, "systemctl is-enabled de10-nano-gadget-init.service > %s", szFilename);
+        res = system(szCommand);
+        if (res == -1){
+            printf("command return fail, code:%d", res);
+        }else{
+                FILE *file;
+                int nReadSize;
+                long int nSize;
+                const char szEnable[] = "enabled";
+                const char szDisable[] = "disabled";
+
+                usleep( 200*1000 ); // delay to make sure the file is ready.
+
+                file = fopen(szFilename, "r");
+                if (file == 0){
+                    printf("failed to open file %s\r\n", szFilename);
+                }else{
+                    fseek(file, 0L, SEEK_END);
+                    nSize = ftell(file);
+                    if(nSize < 0)
+                       nSize = 0;
+                    fseek(file, 0L, SEEK_SET);
+
+                    //
+                    char *szData;
+                    szData = new char[nSize];
+                    nReadSize = fread(szData, 1, nSize, file);
+
+                    if (nReadSize == strlen(szEnable)+1){
+                        if (strncmp(szEnable,szData, strlen(szEnable)) == 0){
+                            *bEnable = true;
+                            bSuccess = true;
+                        }
+                    }else  if (nReadSize == strlen(szDisable)+1){
+                        if (strncmp(szDisable,szData, strlen(szDisable)) == 0){
+                            *bEnable = false;
+                            bSuccess = true;
+                        }
+                    }
+
+                    delete []szData;
+
+                    fclose(file);
+
+                }
+
+        }
+        remove(szFilename);
+
+
+    if (!bSuccess && bShowError){
+        sprintf(szInfo, "Failed to query USB gadget setting.\r\n");
+        QMessageBox(QMessageBox:: Warning, "Error", szInfo, QMessageBox::Ok).exec();
+    }
+
+
+    return bSuccess;
+}