Adds driver for msa301 sensore module

drivers/sensors/Kconfig

@@ -429,6 +429,13 @@ config SENSORS_LSM9DS1
 	---help---
 		Enable driver support for the STMicro LSM9DS1.
 
+config SENSORS_MSA301
+	bool "MSA301 support"
+	default n
+	select I2C
+	---help---
+		Enable driver support for the MSA301.
+
 config LSM9DS1_I2C_FREQUENCY
 	int "LSM9DS1 I2C frequency"
 	default 400000

drivers/sensors/Make.defs

@@ -96,6 +96,10 @@ ifeq ($(CONFIG_SENSORS_LSM9DS1),y)
   CSRCS += lsm9ds1.c
 endif
 
+ifeq ($(CONFIG_SENSORS_MSA301),y)
+  CSRCS += msa301.c
+endif
+
 ifeq ($(CONFIG_SENSORS_LPS25H),y)
   CSRCS += lps25h.c
 endif

include/nuttx/sensors/msa301.h

@@ -0,0 +1,118 @@
+#ifndef __MSA301_H
+#define __MSA301_H
+
+#include <nuttx/config.h>
+#include <nuttx/sensors/ioctl.h>
+
+#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_MSA301)
+
+#define MSA301_ACCEL_ADDR0	0x26
+
+#define SNIOC_MSA301_START                _SNIOC(0x0001)
+#define SNIOC_MSA301_STOP                 _SNIOC(0x0002)
+#define SNIOC_MSA301_SET_RANGE            _SNIOC(0x0003)
+#define SNIOC_MSA301_SET_RATE             _SNIOC(0x0004)
+
+#define MSA301_REG_PARTID 0x01
+#define MSA301_REG_OUT_X_L 0x02
+#define MSA301_REG_OUT_X_H 0x03
+#define MSA301_REG_OUT_Y_L 0x04
+#define MSA301_REG_OUT_Y_H 0x05
+#define MSA301_REG_OUT_Z_L 0x06
+#define MSA301_REG_OUT_Z_H 0x07
+#define MSA301_REG_MOTIONINT 0x09
+#define MSA301_REG_DATAINT 0x0A
+#define MSA301_REG_CLICKSTATUS 0x0B
+#define MSA301_REG_RESRANGE 0x0F
+#define MSA301_REG_ODR 0x10
+#define MSA301_REG_POWERMODE 0x11
+#define MSA301_REG_INTSET0 0x16
+#define MSA301_REG_INTSET1 0x17
+#define MSA301_REG_INTMAP0 0x19
+#define MSA301_REG_INTMAP1 0x1A
+#define MSA301_REG_TAPDUR 0x2A
+#define MSA301_REG_TAPTH 0x2B
+
+/** The accelerometer ranges */
+typedef enum {
+  MSA301_RANGE_2_G  = 0x0,  ///< +/- 2g
+  MSA301_RANGE_4_G  = 0x1,  ///< +/- 4g
+  MSA301_RANGE_8_G  = 0x2,  ///< +/- 8g
+  MSA301_RANGE_16_G = 0x3, ///< +/- 16g
+} msa301_range_t;
+
+#define MSA301_CTL_RANGE_SHIFT  (0x0)
+#define MSA301_CTL_RANGE_MASK   (0x3<<0)
+
+/** The accelerometer data rate */
+typedef enum {
+  MSA301_RATE_1_HZ = 0,     ///<  1 Hz
+  MSA301_RATE_1_95_HZ = 1,  ///<  1.95 Hz
+  MSA301_RATE_3_9_HZ = 2,   ///<  3.9 Hz
+  MSA301_RATE_7_81_HZ = 3,  ///<  7.81 Hz
+  MSA301_RATE_15_63_HZ = 4, ///<  15.63 Hz
+  MSA301_RATE_31_25_HZ = 5, ///<  31.25 Hz
+  MSA301_RATE_62_5_HZ = 6,  ///<  62.5 Hz
+  MSA301_RATE_125_HZ = 7,   ///<  125 Hz
+  MSA301_RATE_250_HZ = 8,   ///<  250 Hz
+  MSA301_RATE_500_HZ = 9,   ///<  500 Hz
+  MSA301_RATE_1000_HZ = 10,  ///<  1000 Hz
+} msa301_rate_t;
+
+#define MSA301_CTL_RATE_SHIFT (0x0)
+#define MSA301_CTL_RATE_MASK  (0xF<<0)
+
+#define MSA301_ENABLE_AXIS    (0x0)
+#define MSA301_DISABLE_AXIS   (0x7)
+#define MSA301_CTL_AXIS_SHIFT (0x05)
+#define MSA301_CTL_AXIS_MASK  (0x7<<5)
+
+/** The accelerometer power mode */
+typedef enum {
+  MSA301_NORMALMODE = 0x00,   ///< Normal (high speed) mode
+  MSA301_LOWPOWERMODE = 0x01, ///< Low power (slow speed) mode
+  MSA301_SUSPENDMODE = 0x10, ///< Suspend (sleep) mode
+} msa301_powermode_t;
+
+#define MSA301_CTL_POWERMODE_SHIFT  (0x6)
+#define MSA301_CTL_POWERMODE_MASK   (0x3<<6)
+
+/** The accelerometer read resolution */
+typedef enum {
+  MSA301_RESOLUTION_14 = 0, ///< 14-bit resolution
+  MSA301_RESOLUTION_12 = 1, ///< 12-bit resolution
+  MSA301_RESOLUTION_10 = 2, ///< 10-bit resolution
+  MSA301_RESOLUTION_8 = 3,  ///< 8-bit resolution
+} msa301_resolution_t;
+
+#define MSA301_CTL_RESOLUTION_SHIFT  (0x2)
+#define MSA301_CTL_RESOLUTION_MASK   (0x3<<2)
+
+struct msa301_sensor_data_s
+{
+  int16_t  x_data;
+  int16_t  y_data;
+  int16_t  z_data;
+
+  float x_acc;                       /* X axis acceleration */
+  float y_acc;                       /* Y axis acceleration */
+  float z_acc;                       /* Z axis acceleration */
+};
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+int msa301_sensor_register(FAR const char *devpath,
+                           FAR struct i2c_master_s *i2c
+                          );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_I2C && CONFIG_SENSORS_MSA301 */
+#endif
+