added lorawan example in IAR, and added support for LIS3MDL and LPS22HB sensors

1. modified the HTS221: removed magic numbers, added a sensor_tempnhumi_t struct to accommodate temperature and humidity data
2. added .h and .c files for LIS3MDL magnetic sensor
3. added .h and .c files for LPS22HB pressure sensor
3. added IAR (EWARM) project for lorawan example
4. added bsp.c and bsp.h to manager the sensors

board/NUCLEO_STM32L073RZ/BSP/HardWare/Common/bsp.h

@@ -0,0 +1,89 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2013 Semtech
+
+Description: contains all hardware driver
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis and Gregory Cristian
+*/
+/**
+  ******************************************************************************
+  * @file    bsp.h
+  * @author  MCD Application Team
+  * @brief   contains all hardware driver
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2018 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Ultimate Liberty license
+  * SLA0044, the "License"; You may not use this file except in compliance with
+  * the License. You may obtain a copy of the License at:
+  *                             www.st.com/SLA0044
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __BSP_H__
+#define __BSP_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* Includes ------------------------------------------------------------------*/
+#include <stdint.h>
+#include "HTS221.h"
+#include "LPS22HB.h"
+#include "LIS3MDL.h"
+  
+/* Exported types ------------------------------------------------------------*/
+typedef struct
+{
+  sensor_press_t       sensor_press;         /* pressure sensor          */
+  sensor_tempnhumi_t   sensor_tempnhumi;     /* temperature and humidity */
+  sensor_magn_t        sensor_magn;          /* magnetometer             */
+  
+  //--------------------------- accelerator and gyroscope  -------------------//
+  int16_t  accel_x;                           /* in g           */
+  int16_t  accel_y;                           /* in g           */
+  int16_t  accel_z;                           /* in g           */
+  int16_t  gyro_x;                            /* in degree/s    */
+  int16_t  gyro_y;                            /* in degree/s    */
+  int16_t  gyro_z;                            /* in degree/s    */
+  
+} sensor_data_t;
+
+/* Exported constants --------------------------------------------------------*/
+/* External variables --------------------------------------------------------*/
+/* Exported macros -----------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+/**
+ * @brief  initialises the sensor
+ *
+ * @note
+ * @retval None
+ */
+void  BSP_Sensor_Init(void);
+
+/**
+ * @brief  sensor  read.
+ *
+ * @note none
+ * @retval sensor_data
+ */
+void BSP_Sensor_Read(sensor_data_t *sensor_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BSP_H__ */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/