增加从设备描述符iProduct域中判断通信协议版本的接口

hgdriver/hgdev/scanner_manager.cpp

@@ -743,6 +743,11 @@ scanner_err hg_scanner_mgr::hg_scanner_open(scanner_handle* h, const char* name,
         ret = (scanner_err)usb_manager::instance()->open(it->dev, &io, &hg_scanner_mgr::last_open_msg_);
         if (ret == SCANNER_ERR_OK)
         {
+            if (io->get_ver() > 1)
+            {
+                // new version ...
+            }
+
             hg_scanner* scanner  = g_supporting_devices[it->ind].create_scanner(it->display_name.c_str(), io, h);
             if (!scanner)
             {

hgdriver/hgdev/usb_manager.cpp

@@ -769,6 +769,24 @@ void usb_io::init_after_open(void)
         close();
         last_err_ = err;
     }
+    else
+    {
+        char    str[128] = { 0 }, *ver = nullptr;
+        libusb_device_descriptor    dd = { 0 };
+
+        libusb_get_device_descriptor(dev_info_.device, &dd);
+        libusb_get_string_descriptor_ascii(handle_, dd.iProduct, (unsigned char*)str, _countof(str) - 1);
+        VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Device Product: '%s'\n", str);
+        ver = strstr(str, "(V");
+        if (ver)
+        {
+            ver_ = (int)atof(ver + 2);
+        }
+        else
+        {
+            ver_ = 1;
+        }
+    }
 }
 void usb_io::open(void)
 {
@@ -1107,6 +1125,10 @@ int usb_io::get_pid(void)
 {
     return dev_info_.pid;
 }
+int usb_io::get_ver(void)
+{
+    return ver_;
+}
 
 void usb_io::on_disconnected(void)
 {

hgdriver/hgdev/usb_manager.h

@@ -152,6 +152,7 @@ class usb_io
     int                     last_err_;
     std::string             init_err_msg_;
     libusb_device           *ref_device_;
+    unsigned int            ver_ = 1;
 
     // endpoint ports
     usb_manager::USBTRANSENDP  endpoints_;
@@ -191,6 +192,7 @@ public:
     libusb_device* get_usb_device(void);                // 获取该USB对象
     int get_vid(void);                                  // 获取连接到该USB端口上的设备VID
     int get_pid(void);                                  // 获取连接到该USB端口上的设备PID
+    int get_ver(void);
 
     void on_disconnected(void);
     std::string init_error_msg(void);