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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-02-17 23:21:28 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-02-17 23:21:28 +0000 |
commit | e3940eb2080711edac189cca3f642ee89dc215f2 (patch) | |
tree | 1c390958fae49e34dce698b175487e6d4681e540 /nuttx/drivers | |
parent | 2223612deb2cc6322992f8595b6d6f86fcb53ae1 (diff) | |
download | px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.tar.gz px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.tar.bz2 px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.zip |
NuttX RTOS
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers')
-rw-r--r-- | nuttx/drivers/Makefile | 74 | ||||
-rw-r--r-- | nuttx/drivers/dev_null.c | 89 |
2 files changed, 163 insertions, 0 deletions
diff --git a/nuttx/drivers/Makefile b/nuttx/drivers/Makefile new file mode 100644 index 000000000..dcd4dec62 --- /dev/null +++ b/nuttx/drivers/Makefile @@ -0,0 +1,74 @@ +############################################################ +# Makefile +# +# Copyright (C) 2007 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# +# 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 Gregory Nutt 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)/Make.defs + +MKDEP = $(TOPDIR)/tools/mkdeps.sh + +ASRCS = +AOBJS = $(ASRCS:.S=.o) + +CSRCS = dev_null.c +COBJS = $(CSRCS:.c=.o) + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +BIN = libdrivers.a + +all: $(BIN) + +$(AOBJS): %.o: %.S + $(CC) -c $(CFLAGS) -D__ASSEMBLY__ $< -o $@ + +$(cOBJS): %.o: %.c + $(CC) -c $(CFLAGS) $< -o $@ + +$(BIN): $(OBJS) + $(AR) rcs $@ $(OBJS) + +.depend: Makefile $(SRCS) + $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep + touch $@ + +depend: .depend + +clean: + rm -f $(BIN) *.o *~ + +distclean: clean + rm -f Make.dep .depend + +-include Make.dep diff --git a/nuttx/drivers/dev_null.c b/nuttx/drivers/dev_null.c new file mode 100644 index 000000000..f4211b513 --- /dev/null +++ b/nuttx/drivers/dev_null.c @@ -0,0 +1,89 @@ +/************************************************************ + * dev_null.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 Gregory Nutt 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. + * + ************************************************************/ + +/************************************************************ + * Compilation Switches + ************************************************************/ + +/************************************************************ + * Included Files + ************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <string.h> +#include <errno.h> +#include <nuttx/fs.h> + +/************************************************************ + * Private Function Prototypes + ************************************************************/ + +static ssize_t devnull_read(struct file *, char *, size_t); +static ssize_t devnull_write(struct file *, const char *, size_t); + +/************************************************************ + * Private Data + ************************************************************/ + +static struct file_operations devnull_fops = +{ + .read = devnull_read, + .write = devnull_write, +}; + +/************************************************************ + * Private Functions + ************************************************************/ + +static ssize_t devnull_read(struct file *filp, char *buffer, size_t len) +{ + return 0; /* Return EOF */ +} + +static ssize_t devnull_write(struct file *filp, const char *buffer, size_t len) +{ + return len; /* Say that everything was written */ +} + +/************************************************************ + * Public Functions + ************************************************************/ + +void devnull_register(void) +{ + (void)register_inode("/dev/null", &devnull_fops, 0666, NULL); +} |