Add loopback support to STM32 CAN driver; Add apps/examples/can loopback test

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4213 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 11 insertions, 8 deletions

diff --git a/apps/examples/Makefile b/apps/examples/Makefile
index 2c82c5145..ec38c8a8f 100644
--- a/apps/examples/Makefile
+++ b/apps/examples/Makefile
@@ -42,25 +42,28 @@ SUBDIRS = adc buttons dhcpd ftpc hello helloxx hidkbd igmp lcdrw mm mount \
 	nxtext ostest pashello pipe poll pwm rgmp romfs sendmail serloop \
 	thttpd tiff touchscreen udp uip usbserial usbstorage usbterm wget wlan
 
-# Sub-directories that might need context setup
+# Sub-directories that might need context setup.  Directories may need
+# context setup for a variety of reasons, but the most common is because
+# the example may be built as an NSH built-in function.
+#
+# Directories that may be built as NSH built-in functions may have their
+# own configuration setting (like CONFIG_EXAMPLES_HELLOXX_BUILTIN), but
+# many only depend on the generic CONFIG_NSH_BUILTIN_APPS setting.  And
+# there a few which an ONLY be built as NSH built-in applications; these
+# are included in the list unconditionally.
 
 CNTXTDIRS = pwm
 
 ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
-CNTXTDIRS +=  adc
-endif
-ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
-CNTXTDIRS +=  dhcpd
+CNTXTDIRS +=  adc can dhcpd nettest
 endif
+
 ifeq ($(CONFIG_EXAMPLES_HELLOXX_BUILTIN),y)
 CNTXTDIRS +=  helloxx
 endif
 ifeq ($(CONFIG_EXAMPLES_LCDRW_BUILTIN),y)
 CNTXTDIRS +=  lcdrw
 endif
-ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
-CNTXTDIRS +=  nettest
-endif
 ifeq ($(CONFIG_EXAMPLES_NX_BUILTIN),y)
 CNTXTDIRS +=  nx
 endif