Add a text for the new composite USB device

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4341 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 11 insertions, 0 deletions

diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 76790e1694..0a75bf0175 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -1005,6 +1005,11 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_CDCACM_COMPOSITE
 		  Configure the CDC serial driver as part of a composite driver
 		  (only if CONFIG_USBDEV_COMPOSITE is also defined)
+		CONFIG_CDCACM_IFNOBASE
+ 		  If the CDC driver is part of a composite device, then this may need to 
+		  be defined to offset the CDC/ACM interface numbers so that they are
+		  unique and contiguous.  When used with the Mass Storage driver, the
+		  correct value for this offset is zero.
 		CONFIG_CDCACM_EP0MAXPACKET
 		  Endpoint 0 max packet size. Default 64.
 		CONFIG_CDCACM_EPINTIN
@@ -1057,6 +1062,12 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_USBMSC_COMPOSITE
 		  Configure the mass storage driver as part of a composite driver
 		  (only if CONFIG_USBDEV_COMPOSITE is also defined)
+		CONFIG_USBMSC_IFNOBASE
+		  If the CDC driver is part of a composite device, then this may need to 
+		  be defined to offset the mass storage interface number so that it is
+		  unique and contiguous.  When used with the CDC/ACM driver, the
+		  correct value for this offset is two (because of the two CDC/ACM
+ 		  interfaces that will precede it).
 		CONFIG_USBMSC_EP0MAXPACKET
 		  Max packet size for endpoint 0
 		CONFIG_USBMSCEPBULKOUT and CONFIG_USBMSC_EPBULKIN