diff --git a/src/libusb_wrapper.c b/src/libusb_wrapper.c
index c277b3b..d4572c7 100644
--- a/src/libusb_wrapper.c
+++ b/src/libusb_wrapper.c
@@ -34,6 +34,22 @@ ssize_t getListDevices(libusb_context *context, libusb_device ***list_ptr) {
     return count;
 }
 
+void* _enumerateDevices(libusb_context *context, void (*func)(libusb_device *device)){
+    libusb_device **list;
+    ssize_t count = getListDevices(context, &list);
+
+    ssize_t i = 0;
+    for (i = 0; i < count; i++) {
+        libusb_device *device = list[i];
+
+        func(device);
+    }
+
+    libusb_free_device_list(list, 1);
+
+    return NULL; //DBGONLY TEMP
+}
+
 //print readable string, not asked for tutoring
 void _printConfig(libusb_device *device) {//private method
     // Ouverture du périphérique
@@ -62,51 +78,41 @@ void _printConfig(libusb_device *device) {//private method
 }
 
 
-void displayDevices(libusb_context *context) {
-    libusb_device **list;
-    ssize_t count = getListDevices(context, &list);
+void _displayOneDevice(libusb_device *device){
+    struct libusb_device_descriptor desc;
 
-    ssize_t i = 0;
-    for (i = 0; i < count; i++) {
-        libusb_device *device = list[i];
-        struct libusb_device_descriptor desc;
-
-        int status = libusb_get_device_descriptor(device, &desc);
-        if (status != LIBUSB_SUCCESS){
-            printf("Cannot get device desc : %s\n", libusb_error_name(status)); //DBGONLY
-            perror("libusb_open");
-            continue;
-        }
+    int status = libusb_get_device_descriptor(device, &desc);
+    if (status != LIBUSB_SUCCESS){
+        printf("Cannot get device desc : %s\n", libusb_error_name(status)); //DBGONLY
+        perror("libusb_open");
+        return;
+    }
 
-        uint8_t bus = libusb_get_bus_number(device);
-        uint8_t address = libusb_get_device_address(device);
+    uint8_t bus = libusb_get_bus_number(device);
+    uint8_t address = libusb_get_device_address(device);
 
-        printf("Device Found @ (Bus:Address) %d:%d\n", bus, address);
-        printf("Vendor ID 0x0%x\n", desc.idVendor);
-        printf("Product ID 0x0%x\n", desc.idProduct);
+    printf("Device Found @ (Bus:Address) %d:%d\n", bus, address);
+    printf("Vendor ID 0x0%x\n", desc.idVendor);
+    printf("Product ID 0x0%x\n", desc.idProduct);
 
+    //_printConfig(device); //Does it work ?
+    //displayDeviceEndpoints(device); //Not really work on Axel@Alptop
+}
 
-        //_printConfig(device); //Does it work ?
-        //displayDeviceEndpoints(device); //Not really work on Axel@Alptop
-    }
+void displayDevices(libusb_context *context) {
+    _enumerateDevices(context, _displayOneDevice);
+}
 
-    libusb_free_device_list(list, 1);
+//void getFirstDeviceFromID(vid, pid)
 
-}
 
+//void getDevicesFromID(vid, pid)
 
-void displayDeviceEndpoints(libusb_device *device) {
-    printf("Yes you're in\n");
 
-    // Ouverture du périphérique
-    libusb_device_handle *handle;
-    int statusDevice = libusb_open(device, &handle);
-    if (statusDevice != LIBUSB_SUCCESS) {
-        printf("This error is : %d\n", statusDevice); //DBGONLY
-        printf("Printable error : %s\n", libusb_error_name(statusDevice)); //DBGONLY
-        perror("libusb_open");
-        return;
-    }
+void displayDeviceEndpoints(libusb_device_handle* handle) {
+    //recover pointer from handle
+    libusb_device *device;
+    device = libusb_get_device(handle);
 
 
     // lectures des configs?
--
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