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| author | Dean Camera <dean@fourwalledcubicle.com> | 2010-01-04 13:34:02 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-01-04 13:34:02 +0000 |
| commit | 6122ba93cf957bd495fdd1838bac16fb24896a17 (patch) | |
| tree | b8cef2eb41161e5beb7523f30b54ac03dfd7e9b4 /Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c | |
| parent | 1e1cf2c499d7ac0cfae536e1264af4645350813b (diff) | |
| download | lufa-6122ba93cf957bd495fdd1838bac16fb24896a17.tar.gz lufa-6122ba93cf957bd495fdd1838bac16fb24896a17.tar.bz2 lufa-6122ba93cf957bd495fdd1838bac16fb24896a17.zip | |
Fix MassStorageKeyboard demo USE_INTERNAL_SERIAL check being performed before the required library headers were included, causing a compilation error.
Added notes to the class driver functions indicating which functions require what Device/Host state machine states to function.
Diffstat (limited to 'Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c')
| -rw-r--r-- | Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c index b779ea342..d3e4214fa 100644 --- a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c +++ b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c @@ -29,10 +29,6 @@ this software.
*/
-#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
- #warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
-#endif
-
/** \file
*
* USB Device Descriptors, for library use when in USB device mode. Descriptors are special
@@ -42,6 +38,18 @@ #include "Descriptors.h"
+/* On some devices, there is a factory set internal serial number which can be automatically sent to the host as
+ * the device's serial number when the Device Descriptor's .SerialNumStrIndex entry is set to USE_INTERNAL_SERIAL.
+ * This allows the host to track a device across insertions on different ports, allowing them to retain allocated
+ * resources like COM port numbers and drivers. On demos using this feature, give a warning on unsupported devices
+ * so that the user can supply their own serial number descriptor instead or remove the USE_INTERNAL_SERIAL value
+ * from the Device Descriptor (forcing the host to generate a serial number for each device from the VID, PID and
+ * port location).
+ */
+#if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
+ #warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
+#endif
+
/** HID class report descriptor. This is a special descriptor constructed with values from the
* USBIF HID class specification to describe the reports and capabilities of the HID device. This
* descriptor is parsed by the host and its contents used to determine what data (and in what encoding)
|