configs/stm32f4discovery: Integrate BH1750FVI driver in the STM32F4Discovery board

ChangeLog

@@ -11653,3 +11653,5 @@
 	  frequency.  Noted by Henry Zhang (2015-04-15).
 	* drivers/sensors/h1750fvi.c:  Add a character driver for Rohm Ambient
 	  Light Sensor BH1750FVI.  From Alan Carvalho de Assi (2016-04-15).
+	* configs/stm32f4discovery: Integrate BH1750FVI driver in the
+	  STM32F4Discovery board.  From Alan Carvalho de Assi (2016-04-15).

configs/stm32f4discovery/src/Makefile

@@ -52,6 +52,10 @@ ifeq ($(CONFIG_STM32_OTGFS),y)
 CSRCS += stm32_usb.c
 endif
 
+ifeq ($(CONFIG_BH1750FVI),y)
+CSRCS += stm32_bh1750fvi.c
+endif
+
 ifeq ($(CONFIG_BMP180),y)
 CSRCS += stm32_bmp180.c
 endif

configs/stm32f4discovery/src/stm32_bh1750fvi.c

@@ -0,0 +1,105 @@
+/************************************************************************************
+ * configs/stm32f4discovery/src/stm32_bh1750fvi.c
+ *
+ *   Copyright (C) 2016 Alan Carvalho de Assis. 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.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/spi/spi.h>
+#include <nuttx/sensors/bh1750fvi.h>
+
+#include "stm32.h"
+#include "stm32_i2c.h"
+#include "stm32f4discovery.h"
+
+#if defined(CONFIG_I2C) && defined(CONFIG_BH1750FVI)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#define BH1750FVI_I2C_PORTNO 1   /* On I2C1 */
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_bh1750initialize
+ *
+ * Description:
+ *   Initialize and register the MPL115A Pressure Sensor driver.
+ *
+ * Input parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/light0"
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ************************************************************************************/
+
+int stm32_bh1750initialize(FAR const char *devpath)
+{
+  FAR struct i2c_master_s *i2c;
+  int ret;
+
+  sndbg("Initializing BH1750FVI!\n");
+
+  /* Initialize I2C */
+
+  i2c = stm32_i2cbus_initialize(BH1750FVI_I2C_PORTNO);
+
+  if (!i2c)
+    {
+      return -ENODEV;
+    }
+
+  /* Then register the barometer sensor */
+
+  ret = bh1750fvi_register(devpath, i2c, BH1750FVI_I2C_ADDR);
+  if (ret < 0)
+    {
+      sndbg("Error registering BM180\n");
+    }
+
+  return ret;
+}
+
+#endif /* CONFIG_I2C && CONFIG_BH1750FVI && CONFIG_STM32_I2C1 */

configs/stm32f4discovery/src/stm32_bringup.c

@@ -98,6 +98,10 @@ int stm32_bringup(void)
 #endif
   int ret = OK;
 
+#ifdef CONFIG_BH1750FVI
+  stm32_bh1750initialize("/dev/light0");
+#endif
+
 #ifdef CONFIG_ZEROCROSS
   /* Configure the zero-crossing driver */
 

configs/stm32f4discovery/src/stm32f4discovery.h

@@ -355,6 +355,19 @@
 
 void weak_function stm32_spidev_initialize(void);
 
+/****************************************************************************
+ * Name: stm32_bh1750initialize
+ *
+ * Description:
+ *   Called to configure an I2C and to register BH1750FVI for the stm32f4discovery
+ *   board.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BH1750FVI
+int stm32_bh1750initialize(FAR const char *devpath);
+#endif
+
 /****************************************************************************
  * Name: stm32_bmp180initialize
  *