drvers/sensor and include/nuttx/sensors: Add support to Bosch BMP180 barometer. From Alan Carvalho de Assis.

drivers/sensors/Kconfig

@@ -3,6 +3,13 @@
 # see the file kconfig-language.txt in the NuttX tools repository.
 #
 
+config BMP180
+	bool "Bosch BMP180 Barometer Sensor support"
+	default n
+	select I2C
+	---help---
+		Enable driver support for the Bosch BMP180 barometer sensor.
+
 config LIS331DL
 	bool "ST LIS331DL device support"
 	default n

drivers/sensors/Make.defs

@@ -53,6 +53,10 @@ ifeq ($(CONFIG_ADXL345_I2C),y)
   CSRCS += adxl345_i2c.c
 endif
 
+ifeq ($(CONFIG_BMP180),y)
+  CSRCS += bmp180.c
+endif
+
 ifeq ($(CONFIG_I2C_LM75),y)
   CSRCS += lm75.c
 endif
@@ -82,4 +86,4 @@ DEPPATH += --dep-path sensors
 VPATH += :sensors
 CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)drivers$(DELIM)sensors}
 
-endif # CONFIG_SENSORS
+endif # CONFIG_SENSORS

include/nuttx/sensors/bmp180.h

@@ -0,0 +1,92 @@
+/********************************************************************************************
+ * drivers/sensors/bmp180.h
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *
+ * 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.
+ *
+ ********************************************************************************************/
+
+#ifndef __DRIVERS_SENSORS_BMP180_H
+#define __DRIVERS_SENSORS_BMP180_H
+
+#if defined(CONFIG_BMP180)
+
+/********************************************************************************************
+ * Pre-processor Definitions
+ ********************************************************************************************/
+
+#define BMP180_I2C_PORTNO 1
+
+/* Configuration ****************************************************************************/
+/* Prerequisites:
+ *
+ * CONFIG_BMP180
+ *   Enables support for the BMP180 driver
+ * CONFIG_BMP180_REGDEBUG
+ *   Enable very low register-level debug output.  Requires CONFIG_DEBUG.
+ */
+
+/********************************************************************************************
+ * Public Function Prototypes
+ ********************************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: bmp180_register
+ *
+ * Description:
+ *   Register the BMP180 character device as 'devpath'
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/press0"
+ *   i2c     - An instance of the I2C interface to use to communicate with
+ *             BMP180
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int bmp180_register(FAR const char *devpath, FAR struct i2c_dev_s *i2c);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_BMP180 */
+#endif /* __DRIVERS_BMP180_H */