Oops - missed a few references to the old global TimeoutMSRemaining counter in ISPTar...

[pub/USBasp.git] / Demos / Device / ClassDriver / MassStorageKeyboard / Descriptors.c

diff --git a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
index b779ea3..e8523f4 100644 (file)
--- a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
+++ b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
@@ -29,10 +29,6 @@
   this software.\r
 */\r
 \r
-#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)\r
-       #warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.\r
-#endif\r
-\r
 /** \file\r
  *\r
  *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special \r
@@ -42,6 +38,18 @@
 \r
 #include "Descriptors.h"\r
 \r
+/* On some devices, there is a factory set internal serial number which can be automatically sent to the host as\r
+ * the device's serial number when the Device Descriptor's .SerialNumStrIndex entry is set to USE_INTERNAL_SERIAL.\r
+ * This allows the host to track a device across insertions on different ports, allowing them to retain allocated\r
+ * resources like COM port numbers and drivers. On demos using this feature, give a warning on unsupported devices\r
+ * so that the user can supply their own serial number descriptor instead or remove the USE_INTERNAL_SERIAL value\r
+ * from the Device Descriptor (forcing the host to generate a serial number for each device from the VID, PID and\r
+ * port location).\r
+ */\r
+#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)\r
+       #warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.\r
+#endif\r
+\r
 /** HID class report descriptor. This is a special descriptor constructed with values from the\r
  *  USBIF HID class specification to describe the reports and capabilities of the HID device. This\r
  *  descriptor is parsed by the host and its contents used to determine what data (and in what encoding)\r
@@ -173,8 +181,8 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
                {\r
                        .Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},\r
 \r
-                       .InterfaceNumber        = 0x01,\r
-                       .AlternateSetting       = 0x00,\r
+                       .InterfaceNumber        = 1,\r
+                       .AlternateSetting       = 0,\r
                        \r
                        .TotalEndpoints         = 1,\r
                                \r