examples/cpuhog and serialblaster from Bob Doiron

4 files changed, 296 insertions, 0 deletions

diff --git a/apps/examples/cpuhog/.gitignore b/apps/examples/cpuhog/.gitignore
new file mode 100644
index 000000000..fa1ec7579
--- /dev/null
+++ b/apps/examples/cpuhog/.gitignore
@@ -0,0 +1,11 @@
+/Make.dep
+/.depend
+/.built
+/*.asm
+/*.obj
+/*.rel
+/*.lst
+/*.sym
+/*.adb
+/*.lib
+/*.src
diff --git a/apps/examples/cpuhog/Kconfig b/apps/examples/cpuhog/Kconfig
new file mode 100644
index 000000000..a74074537
--- /dev/null
+++ b/apps/examples/cpuhog/Kconfig
@@ -0,0 +1,13 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+config EXAMPLES_CPUHOG
+    bool "CPU Hog"
+    default n
+    ---help---
+        Enable the cpuhog example
+
+if EXAMPLES_CPUHOG
+endif
diff --git a/apps/examples/cpuhog/Makefile b/apps/examples/cpuhog/Makefile
new file mode 100644
index 000000000..995380b0e
--- /dev/null
+++ b/apps/examples/cpuhog/Makefile
@@ -0,0 +1,109 @@
+############################################################################
+# apps/examples/cpuhog/Makefile
+#
+#   Copyright (C) 2014 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
+
+# do nothing loop to use up cpu time
+
+ASRCS =
+CSRCS = cpuhog_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 .
+
+# Built-in application info
+
+APPNAME = cpuhog
+PRIORITY = SCHED_PRIORITY_LOW
+STACKSIZE = 1024
+
+# 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/cpuhog/cpuhog_main.c b/apps/examples/cpuhog/cpuhog_main.c
new file mode 100644
index 000000000..26c456952
--- /dev/null
+++ b/apps/examples/cpuhog/cpuhog_main.c
@@ -0,0 +1,163 @@
+/****************************************************************************
+ * examples/cpuhog/cpuhog_main.c
+ *
+ *   Copyright (C) 2014 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 <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <nuttx/clock.h>
+#include <nuttx/arch.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define CPUHOG_FIFO_FNAME "/dev/cpuhogfifo"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct state_s
+{
+  volatile bool initialized;
+  sem_t sem;
+  int count;
+} g_state;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int cpuhog_main(int argc, char *argv[])
+{
+  int id = -1;
+  char buf[256];
+  int fd = -1;
+
+  if (!g_state.initialized)
+    {
+      sem_init(&g_state.sem, 0, 1);
+      mkfifo(CPUHOG_FIFO_FNAME, 0666);
+      g_state.count = 0;
+      g_state.initialized = true;
+      printf("cpuhog initialized\n");
+    }
+
+  while(1)
+    {
+      /* To test semaphore interaction (debugging system crashes...) */
+
+      while (sem_wait(&g_state.sem) != 0)
+        {
+          ASSERT(errno == EINTR);
+        }
+
+      /* Burn some inside semlock */
+
+      up_udelay(3000);
+      sem_post(&g_state.sem);
+
+      /* Unassigned */
+
+      if (id == -1)
+        {
+          id = g_state.count++;
+          printf("cpuhog %d", id);
+          if (id == 0)
+            {
+              printf(": consumer\n");
+              fd = open(CPUHOG_FIFO_FNAME, O_RDONLY);
+            }
+          else if (id == 1)
+            {
+              printf(": producer\n");
+              fd = open(CPUHOG_FIFO_FNAME, O_WRONLY);
+            }
+          else
+            {
+              printf("\n");
+            }
+        }
+
+      /* Consumer */
+
+      else if (id == 0)
+        {
+          if (read(fd, buf, sizeof(buf)) > 0)
+            {
+              printf("-");
+            }
+          else
+            {
+              perror("fifo: ");
+            }
+        }
+
+      /* Producer */
+
+      else if (id == 1)
+        {
+          if (write(fd, buf, sizeof(buf)) > 0)
+            {
+              printf("+");
+            }
+          else
+            {
+              perror("fifo: ");
+            }
+        }
+
+      /* Otherwise just a cpu burner */
+
+      else
+        {
+          /* Burn some outside semlock */
+
+          up_udelay(3000);
+        }
+    }
+
+  return 0;
+}