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author | Gregory Nutt <gnutt@nuttx.org> | 2013-10-20 11:37:56 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2013-10-20 11:37:56 -0600 |
commit | 5d38ee0f6f16a8db3b212d9282a21d5833b669e7 (patch) | |
tree | e97ba7461ff319ab77864afdf2aa45f0fcc340d9 /apps/examples/random | |
parent | cd6eaa5af6142c5a1027a14763df280b5c141999 (diff) | |
download | nuttx-5d38ee0f6f16a8db3b212d9282a21d5833b669e7.tar.gz nuttx-5d38ee0f6f16a8db3b212d9282a21d5833b669e7.tar.bz2 nuttx-5d38ee0f6f16a8db3b212d9282a21d5833b669e7.zip |
apps/examples/random: Add a test for /dev/random
Diffstat (limited to 'apps/examples/random')
-rw-r--r-- | apps/examples/random/.gitignore | 11 | ||||
-rw-r--r-- | apps/examples/random/Kconfig | 31 | ||||
-rw-r--r-- | apps/examples/random/Makefile | 107 | ||||
-rw-r--r-- | apps/examples/random/random_main.c | 128 |
4 files changed, 277 insertions, 0 deletions
diff --git a/apps/examples/random/.gitignore b/apps/examples/random/.gitignore new file mode 100644 index 000000000..fa1ec7579 --- /dev/null +++ b/apps/examples/random/.gitignore @@ -0,0 +1,11 @@ +/Make.dep +/.depend +/.built +/*.asm +/*.obj +/*.rel +/*.lst +/*.sym +/*.adb +/*.lib +/*.src diff --git a/apps/examples/random/Kconfig b/apps/examples/random/Kconfig new file mode 100644 index 000000000..8fde3e7d8 --- /dev/null +++ b/apps/examples/random/Kconfig @@ -0,0 +1,31 @@ +# +# For a description of the syntax of this configuration file, +# see misc/tools/kconfig-language.txt. +# + +config EXAMPLES_RANDOM + bool "/dev/random test" + default n + depends on DEV_RANDOM + ---help--- + Enable a simple test of /dev/random + +if EXAMPLES_RANDOM + +config EXAMPLES_MAXSAMPLES + int "I/O buffer size" + default 64 + ---help--- + This is the size of the /dev/random I/O buffer in units of 32-bit + samples. Careful! This buffer is allocated on the stack as needed! + +config EXAMPLES_NSAMPLES; + int "Default samples" + default 8 + ---help--- + When you execute the rand command, a number of samples ranging from + 1 to EXAMPLES_MAXSAMPLES may be specified. If no argument is + specified, this is the default number of samples that will be + collected and displayed. + +endif diff --git a/apps/examples/random/Makefile b/apps/examples/random/Makefile new file mode 100644 index 000000000..7872f6a3d --- /dev/null +++ b/apps/examples/random/Makefile @@ -0,0 +1,107 @@ +############################################################################ +# apps/examples/random/Makefile +# +# Copyright (C) 2008, 2010-2013 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <gnutt@nuttx.org> +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name NuttX nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ + +-include $(TOPDIR)/.config +-include $(TOPDIR)/Make.defs +include $(APPDIR)/Make.defs + +# /dev/random test + +APPNAME = rand +PRIORITY = SCHED_PRIORITY_DEFAULT +STACKSIZE = 1024 + +ASRCS = +CSRCS = random_main.c + +AOBJS = $(ASRCS:.S=$(OBJEXT)) +COBJS = $(CSRCS:.c=$(OBJEXT)) + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +ifeq ($(CONFIG_WINDOWS_NATIVE),y) + BIN = ..\..\libapps$(LIBEXT) +else +ifeq ($(WINTOOL),y) + BIN = ..\\..\\libapps$(LIBEXT) +else + BIN = ../../libapps$(LIBEXT) +endif +endif + +ROOTDEPPATH = --dep-path . + +# Common build + +VPATH = + +all: .built +.PHONY: clean depend distclean + +$(AOBJS): %$(OBJEXT): %.S + $(call ASSEMBLE, $<, $@) + +$(COBJS): %$(OBJEXT): %.c + $(call COMPILE, $<, $@) + +.built: $(OBJS) + $(call ARCHIVE, $(BIN), $(OBJS)) + @touch .built + +ifeq ($(CONFIG_NSH_BUILTIN_APPS),y) +$(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile + $(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main) + +context: $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat +else +context: +endif + +.depend: Makefile $(SRCS) + @$(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep + @touch $@ + +depend: .depend + +clean: + $(call DELFILE, .built) + $(call CLEAN) + +distclean: clean + $(call DELFILE, Make.dep) + $(call DELFILE, .depend) + +-include Make.dep diff --git a/apps/examples/random/random_main.c b/apps/examples/random/random_main.c new file mode 100644 index 000000000..ea8a3abc0 --- /dev/null +++ b/apps/examples/random/random_main.c @@ -0,0 +1,128 @@ +/**************************************************************************** + * examples/random/random_main.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <errno.h> +#include <debug.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ + +#ifndef CONFIG_EXAMPLES_MAXSAMPLES +# define CONFIG_EXAMPLES_MAXSAMPLES 64 +#endif + +#ifndef CONFIG_EXAMPLES_NSAMPLES +# define CONFIG_EXAMPLES_NSAMPLES 8 +#endif + +#if CONFIG_EXAMPLES_NSAMPLES > CONFIG_EXAMPLES_MAXSAMPLES +# warning CONFIG_EXAMPLES_NSAMPLES > CONFIG_EXAMPLES_MAXSAMPLES +# undef CONFIG_EXAMPLES_NSAMPLES +# define CONFIG_EXAMPLES_NSAMPLES CONFIG_EXAMPLES_MAXSAMPLES +#endif + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * rand_main + ****************************************************************************/ + +int rand_main(int argc, char *argv[]) +{ + uint32_t buffer[CONFIG_EXAMPLES_MAXSAMPLES]; + int nsamples = CONFIG_EXAMPLES_NSAMPLES; + ssize_t nread; + int fd; + + /* One argument is possible... the number of samples to collect */ + + if (argc > 1) + { + nsamples = atoi(argv[1]); + } + + /* Clip the numer of samples to the configured buffer size */ + + if (nsamples > CONFIG_EXAMPLES_MAXSAMPLES) + { + nsamples = CONFIG_EXAMPLES_MAXSAMPLES; + } + + /* Open /dev/random */ + + fd = open("/dev/random", O_RDONLY); + if (fd < 0) + { + int errcode = errno; + fprintf(stderr, "ERROR: Failed to open /dev/random: %d\n", errcode); + exit(EXIT_FAILURE); + } + + /* Read the requested number of samples */ + + printf("Reading %d random numbers\n", nsamples); + nread = read(fd, buffer, nsamples * sizeof(uint32_t)); + if (nread < 0) + { + int errcode = errno; + fprintf(stderr, "ERROR: Read from /dev/randon failed: %d\n", errcode); + (void)close(fd); + exit(EXIT_FAILURE); + } + + /* Dump the sample buffer */ + + lib_dumpbuffer("Random values", (FAR const uint8_t*)buffer, nread); + (void)close(fd); + return EXIT_SUCCESS; +} + |