drivers/sensors/h1750fvi.c: Add a character driver for Rohm Ambient Light Sensor BH1750FVI.

2026-06-07 01:05:54 +08:00 · 2016-04-15 08:16:16 -06:00
parent 1f8212679c
commit 7f5339ee5a
6 changed files with 595 additions and 3 deletions
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * include/nuttx/input/bh1750fvi.h
+ *
+ *   Copyright (C) 2015-2016 Gregory Nutt. All rights reserved.
+ *   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.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_SENSORS_BH1750FVI_H
+#define __INCLUDE_NUTTX_SENSORS_BH1750FVI_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/irq.h>
+
+#if defined(CONFIG_BH1750FVI)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* IOCTL Commands ***********************************************************/
+
+#define SNIOC_CHRM          _SNIOC(0x0001) /* Contin. H-Res Mode Arg: None   */
+#define SNIOC_CHRM2         _SNIOC(0x0002) /* Contin. H-Res Mode2 Arg: None  */
+#define SNIOC_CLRM          _SNIOC(0x0003) /* Contin. L-Res Mode Arg: None   */
+#define SNIOC_OTHRM         _SNIOC(0x0004) /* One Time H-Res Mode Arg: None  */
+#define SNIOC_OTHRM2        _SNIOC(0x0005) /* One Time H-Res Mode2 Arg: None */
+#define SNIOC_OTLRM         _SNIOC(0x0006) /* One Time L-Res Mode Arg: None  */
+#define SNIOC_CHMEATIME     _SNIOC(0x0007) /* Change Meas. Time Arg: uint8_t */
+
+/* Device I2C Address*/
+
+#define BH1750FVI_I2C_ADDR        0x23
+
+/* Instruction Set Architecture */
+
+#define BH1750FVI_POWERDOWN       0x00
+#define BH1750FVI_POWERON         0x01
+#define BH1750FVI_RESET           0x07
+#define BH1750FVI_CONTINUOUS_HRM  0x10 /* Continuously H-Resolution Mode */
+#define BH1750FVI_CONTINUOUS_HRM2 0x11 /* Continuously H-Resolution Mode 2 */
+#define BH1750FVI_CONTINUOUS_LRM  0x12 /* Continuously L-Resolution Mode */
+#define BH1750FVI_ONETIME_HRM     0x20 /* One Time H-Resolution Mode */
+#define BH1750FVI_ONETIME_HRM2    0x21 /* One Time H-Resolution Mode 2 */
+#define BH1750FVI_ONETIME_LRM     0x23 /* One Time L-Resolution Mode */
+#define BH1750FVI_MEASURE_TIMEH   0x40 /* Change Measure Time 01000_MT[7,6,5] */
+#define BH1750FVI_MEASURE_TIMEL   0x60 /* Change Measute Time 011_MT[4,3,2,1,0] */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: bh1750fvi_register
+ *
+ * Description:
+ *   Register the BH1750FVI character device as 'devpath'
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/light0"
+ *   i2c     - An instance of the I2C interface to use to communicate with
+ *              BH1750FVI
+ *   addr    - The I2C address of the BH1750FVI.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int bh1750fvi_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
+                       uint8_t addr);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_BH1750FVI */
+#endif /* __INCLUDE_NUTTX_SENSORS_BH1750FVI_H */