Diff: BMP280_SPI.h

Revision:

0:0463be4e35c0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BMP280_SPI.h	Thu Feb 08 09:56:31 2018 +0000
@@ -0,0 +1,115 @@
+/**
+ ******************************************************************************
+ * @file    BMP280_SPI.h
+ * @author  Toyomasa Watarai
+ * @version V1.0.0
+ * @date    8 Feb 2018
+ * @brief   This file contains the class of a BMP280 Digital pressure sensor library with SPI interface
+ ******************************************************************************
+ * @attention
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef MBED_BMP280_SPI_H
+#define MBED_BMP280_SPI_H
+
+#include "mbed.h"
+
+#ifdef _DEBUG
+extern Serial pc;
+#define DEBUG_PRINT(...) pc.printf(__VA_ARGS__)
+#else
+#define DEBUG_PRINT(...)
+#endif
+
+/**  Interface for controlling BMP280 pressure sensor
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "BMP280_SPI.h"
+ *
+ * Serial pc(USBTX, USBRX);
+ * BMP280_SPI sensor(D11, D12, D13, D9); // mosi, miso, sclk, cs
+ *
+ * int main() {
+ *
+ *     while(1) {
+ *         pc.printf("%2.2f degC, %04.2f hPa\n", sensor.getTemperature(), sensor.getPressure());
+ *         wait(1);
+ *     }
+ * }
+ *
+ * @endcode
+ */
+
+/** BMP280_SPI class
+ *
+ *  BMP280_SPI: A library to correct data using Boshe BMP280 pressure sensor device
+ *
+ */
+class BMP280_SPI
+{
+public:
+
+    enum spi_mask {
+        BMP280_SPI_WRITE = 0x7F
+    };
+
+    /** Create a BMP280 instance
+     *  which is connected to specified SPI pins
+     *
+     * @param mosi SPI MOSI pin
+     * @param miso SPI MISO pin
+     * @param sclk SPI SCLK pin
+     * @param cs device CS pin
+     */
+    BMP280_SPI(PinName mosi, PinName miso, PinName sclk, PinName cs);
+
+    /** Destructor of BMP280_SPI
+     */
+    virtual ~BMP280_SPI();
+
+    /** Initializa BMP280 sensor
+     *
+     *  Configure sensor setting and read parameters for calibration
+     *
+     */
+    void initialize(void);
+
+    /** Read the current temperature value (degree Celsius) from BMP280 sensor
+     *
+     * @return Temperature value (degree Celsius)
+     */
+    float getTemperature(void);
+
+    /** Read the current pressure value (hectopascal) from BMP280 sensor
+     *
+     * @return Pressure value (hectopascal)
+     */
+    float getPressure(void);
+
+private:
+
+    SPI         _spi;
+    DigitalOut  _cs;
+    uint16_t    dig_T1;
+    int16_t     dig_T2, dig_T3;
+    uint16_t    dig_P1;
+    int16_t     dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9;
+    int32_t     t_fine;
+
+};
+
+#endif // MBED_BMP280_SPI_H