Diff: MS5611_01BA03.h

Revision:

0:4343d7e75385

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MS5611_01BA03.h	Thu Jan 03 17:12:03 2013 +0000
@@ -0,0 +1,123 @@
+/**
+ * @author Sergii Doroshenko
+ *
+ * @section LICENSE
+ *
+ * Copyright (c) 2010 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @section DESCRIPTION
+ *
+ * MS5611_01BA03 Barometric Pressure Sensor, Variometer.
+ *
+ * Datasheet:
+ *
+ * http://www.meas-spec.com/downloads/MS5611-01BA03.pdf
+ */
+ 
+#ifndef MS5611_01BA03_SPI_H
+#define MS5611_01BA03_SPI_H
+
+/**
+ * Includes
+ */
+#include "mbed.h"
+
+/**
+ * Defines
+ */
+#define ENABLE_BARO *cs_ = 0
+#define DISABLE_BARO *cs_ = 1
+
+/**
+ * Registers
+ */
+#define MS561101BA_PRESSURE     0x40
+#define MS561101BA_TEMPERATURE  0x50
+#define MS561101BA_RESET        0x1E
+
+/**
+ * OSR (Over Sampling Ratio) constants
+ */
+#define MS561101BA_OSR_256      0x00
+#define MS561101BA_OSR_512      0x02
+#define MS561101BA_OSR_1024     0x04
+#define MS561101BA_OSR_2048     0x06
+#define MS561101BA_OSR_4096     0x08
+
+#define OSR MS561101BA_OSR_4096 
+
+
+
+class MS5611_01BA03 {
+
+public:
+
+    /**
+     * Constructor.
+     *
+     * Send reset sequence at first
+     *
+     * @param mosi - mbed pin to use for the MOSI/SDI spi line.
+     * @param miso - mbed pin to use for the MISO/SDO spi line.
+     * @param sclk - mbed pin to use for the SCL/SCLK  spi line.
+     * @param cs - mbed pin to use for the CS spi line. (for sensor, not for mbed spi)
+     */
+    MS5611_01BA03(PinName mosi, PinName miso, PinName sclk, PinName cs);
+    ~MS5611_01BA03();
+    bool init();
+    int32_t getPressure();
+    int32_t getAltitude();
+    
+private:
+
+    // sensor registers from the MS561101BA datasheet
+    struct {
+        uint16_t c[8];
+        union {uint32_t val; uint8_t raw[4]; } ut; //uncompensated T
+        union {uint32_t val; uint8_t raw[4]; } up; //uncompensated P
+        uint8_t  state;
+        uint32_t deadline;
+    } ms5611_01ba_ctx;
+
+    uint8_t baro_read_reg(char reg);
+    void baro_write_reg(uint8_t reg, uint8_t val);
+    
+    void ms5611_01ba_reset();
+    void ms5611_01ba_readCalibration();
+    
+    
+    void ms5611_01ba_UT_Start();
+    void ms5611_01ba_UT_Read();
+    
+    void ms5611_01ba_UP_Start();
+    void ms5611_01ba_UP_Read();
+    
+    void ms5611_01ba_Calculate();
+    void ms5611_01ba_Update();
+    
+    SPI spi_;   
+    DigitalOut * cs_;
+    Timer timer;
+    int32_t  pressure;
+    int32_t  altitude;
+};
+    
+#endif // MS5611_01BA03_SPI_H
\ No newline at end of file