examples/ina219: A simple infinite loop that polls the INA219 sensor and displays the measurements.

examples/README.txt

@@ -701,6 +701,12 @@ examples/i2cchar
       each time that this test executes.  Not available in the kernel build
       mode.
 
+examples/ina219
+^^^^^^^^^^^^^^^
+
+  This is a simple infinite loop that polls the INA219 sensor and displays
+  the measurements.
+
 examples/ipforward
 ^^^^^^^^^^^^^^^^^^
 

examples/ina219/.gitignore

@@ -0,0 +1,11 @@
+/Make.dep
+/.depend
+/.built
+/*.asm
+/*.obj
+/*.rel
+/*.lst
+/*.sym
+/*.adb
+/*.lib
+/*.src

examples/ina219/Kconfig

@@ -0,0 +1,30 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config EXAMPLES_INA219
+	bool "INA219 example"
+	default n
+	---help---
+		Enable the INA219 example
+
+if EXAMPLES_INA219
+
+config EXAMPLES_INA219_PROGNAME
+	string "Program name"
+	default "ina219"
+	depends on BUILD_KERNEL
+	---help---
+		This is the name of the program that will be use when the NSH ELF
+		program is installed.
+
+config EXAMPLES_INA219_PRIORITY
+	int "INA219 task priority"
+	default 100
+
+config EXAMPLES_INA219_STACKSIZE
+	int "INA219 stack size"
+	default 2048
+
+endif

examples/ina219/Make.defs

@@ -0,0 +1,39 @@
+############################################################################
+# apps/examples/ina219/Make.defs
+# Adds selected applications to apps/ build
+#
+#   Copyright (C) 2017 Sebastien Lorquet. All rights reserved.
+#   Author: Sebastien Lorquet <sebastien@lorquet.fr>
+#
+# 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.
+#
+############################################################################
+
+ifeq ($(CONFIG_EXAMPLES_INA219),y)
+CONFIGURED_APPS += examples/ina219
+endif

examples/ina219/Makefile

@@ -0,0 +1,58 @@
+############################################################################
+# apps/examples/ina219/Makefile
+#
+#   Copyright (C) 2017 Sebastien Lorquet. All rights reserved.
+#   Author: Sebastien Lorquet <sebastien@lorquet.fr>
+#   Copyright (C) 2008, 2010-2013, 2017 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)/Make.defs
+
+# Hello, World! built-in application info
+
+CONFIG_EXAMPLES_INA219_PRIORITY ?= SCHED_PRIORITY_DEFAULT
+CONFIG_EXAMPLES_INA219_STACKSIZE ?= 2048
+
+APPNAME = ina219
+PRIORITY = $(CONFIG_EXAMPLES_INA219_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_INA219_STACKSIZE)
+
+# Hello, World! Example
+
+ASRCS =
+CSRCS =
+MAINSRC = ina219_main.c
+
+CONFIG_EXAMPLES_INA219_PROGNAME ?= ina219$(EXEEXT)
+PROGNAME = $(CONFIG_EXAMPLES_INA219_PROGNAME)
+
+include $(APPDIR)/Application.mk

examples/ina219/ina219_main.c

@@ -0,0 +1,78 @@
+/****************************************************************************
+ * examples/ina219/ina219_main.c
+ *
+ *   Copyright (C) 2017 Sebastien Lorquet. All rights reserved.
+ *   Author: Sebastien Lorquet <sebastien@lorquet.fr>
+ *
+ * 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 <fcntl.h>
+#include <unistd.h>
+#include <nuttx/sensors/ina219.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * ina219_main
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int main(int argc, FAR char *argv[])
+#else
+int ina219_main(int argc, char *argv[])
+#endif
+{
+  struct ina219_s sample;
+  int fd;
+  int ret;
+
+  fd = open("/dev/ina219", O_RDWR);
+  while (1)
+    {
+      ret = read(fd, &sample, sizeof(sample));
+      if (ret != sizeof(sample))
+        {
+          break;
+        }
+
+      printf("U=%12u uV I=%12d uA\n", sample.voltage, sample.current);
+    }
+
+  close(fd);
+  return 0;
+}