Implementation of /dev/random using the STM32 Random Number Generator (RNG)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5207 42af7a65-404d-4744-a932-0658087f49c3

configs/stm3240g-eval/README.txt

@@ -1110,7 +1110,16 @@ Where <subdir> is one of the following:
 
        nsh> umount /mnt/stuff
 
-    11. This configuration requires that jumper JP22 be set to enable RS-232
+    11. By default, this configuration supports /dev/random using the STM32's
+        RNG hardware.  This can be disabled as follows:
+
+        -CONFIG_STM32_RNG=y
+        +CONFIG_STM32_RNG=n
+ 
+        -CONFIG_DEV_RANDOM=y
+        +CONFIG_DEV_RANDOM=n
+
+    12. This configuration requires that jumper JP22 be set to enable RS-232
        operation.
 
   nsh2:

configs/stm3240g-eval/nsh/defconfig

@@ -69,7 +69,6 @@ CONFIG_STM32_BUILDROOT=n
 #
 # JTAG Enable settings (by default JTAG-DP and SW-DP are disabled):
 #
-CONFIG_STM32_DFU=y
 CONFIG_STM32_JTAG_FULL_ENABLE=y
 CONFIG_STM32_JTAG_NOJNTRST_ENABLE=n
 CONFIG_STM32_JTAG_SW_ENABLE=n
@@ -100,7 +99,7 @@ CONFIG_STM32_OTGHS=n
 CONFIG_STM32_DCMI=n
 CONFIG_STM32_CRYP=n
 CONFIG_STM32_HASH=n
-CONFIG_STM32_RNG=n
+CONFIG_STM32_RNG=y
 CONFIG_STM32_OTGFS=n
 # AHB3:
 CONFIG_STM32_FSMC=n
@@ -306,6 +305,7 @@ CONFIG_SCHED_WORKSTACKSIZE=2048
 CONFIG_SIG_SIGWORK=4
 CONFIG_SCHED_WAITPID=y
 CONFIG_SCHED_ATEXIT=n
+CONFIG_DEV_RANDOM=y
 
 #
 # System Logging

configs/stm3240g-eval/src/Makefile

@@ -100,8 +100,8 @@ OBJS		= $(AOBJS) $(COBJS)
 ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
 ifeq ($(WINTOOL),y)
   CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
+			   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
+			   -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
 else
   CFLAGS	+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
 endif