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authorDean Camera <dean@fourwalledcubicle.com>2010-01-12 00:42:00 +0000
committerDean Camera <dean@fourwalledcubicle.com>2010-01-12 00:42:00 +0000
commit89e4d73289b6156aebf4e3e492033d6b017c7813 (patch)
tree3c4b8adc646193a55c764d57e9cc136498fcd8b1 /LUFA
parent5fc294a6503d48b422ce67438d703bdd647de146 (diff)
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Fixed incorrect interface values in the VirtualSerialMouse and KeyboardMouse demo class driver structures.
Added caveat information to the CDC device class driver.
Diffstat (limited to 'LUFA')
-rw-r--r--LUFA/Doxygen.conf4
-rw-r--r--LUFA/Drivers/USB/Class/Device/CDC.h17
-rw-r--r--LUFA/ManPages/ChangeLog.txt1
3 files changed, 20 insertions, 2 deletions
diff --git a/LUFA/Doxygen.conf b/LUFA/Doxygen.conf
index 265a27ec6..c46aba6a1 100644
--- a/LUFA/Doxygen.conf
+++ b/LUFA/Doxygen.conf
@@ -872,14 +872,14 @@ GENERATE_HTMLHELP = NO
# can add a path in front of the file if the result should not be
# written to the html output directory.
-CHM_FILE =
+CHM_FILE = ../LUFA.chm
# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can
# be used to specify the location (absolute path including file name) of
# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run
# the HTML help compiler on the generated index.hhp.
-HHC_LOCATION =
+HHC_LOCATION =
# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag
# controls if a separate .chi index file is generated (YES) or that
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.h b/LUFA/Drivers/USB/Class/Device/CDC.h
index 617410b11..d248868cd 100644
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -38,6 +38,23 @@
* \section Module Description
* Device Mode USB Class driver framework interface, for the CDC USB Class driver.
*
+ * \note There are several major drawbacks to the CDC-ACM standard USB class, however
+ * it is very standardized and thus usually available as a built-in driver on
+ * most platforms, and so is a better choice than a proprietary serial class.
+ *
+ * One major issue with CDC-ACM is that it requires two Interface descriptors,
+ * which will upset most hosts when part of a multi-function "Composite" USB
+ * device, as each interface will be loaded into a separate driver instance. To
+ * conbat this, you should use the "Interface Association Descriptor" addendum to
+ * the USB standard which is available on most OSes when creating Composite devices.
+ *
+ * Another major oversight is that there is no mechanism for the host to notify the
+ * device that there is a data sink on the host side ready to accept data. This
+ * means that the device may try to send data while the host isn't listening, causing
+ * lengthy blocking timeouts in the transmission routines. To combat this, it is
+ * recommended that the virtual serial line DTR (Data Terminal Ready) be used where
+ * possible to determine if a host application is ready for data.
+ *
* @{
*/
diff --git a/LUFA/ManPages/ChangeLog.txt b/LUFA/ManPages/ChangeLog.txt
index 351c33f3e..d0043223e 100644
--- a/LUFA/ManPages/ChangeLog.txt
+++ b/LUFA/ManPages/ChangeLog.txt
@@ -34,6 +34,7 @@
* - Fixed blocking CDC streams not aborting when the host is disconnected
* - Fixed XPLAIN board Dataflash driver broken due to incorrect preprocessor commands
* - Fixed inverted XPLAIN LED driver output (LED turned on when it was supposed to be turned off, and vice-versa)
+ * - Fixed Class Driver struct interface numbers in the KeyboardMouse and VirtualSerialMouse demos
*
* \section Sec_ChangeLog091223 Version 091223
*