Diff: SCP1000.h

Revision:

5:62872ee396a8

Child:

6:d9489d50669d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SCP1000.h	Tue Feb 08 07:31:09 2011 +0000
@@ -0,0 +1,107 @@
+#ifndef SCP1000_H
+#define SCP1000_H
+
+#include "mbed.h"
+
+/**
+ * SCP1000 pressure/temperature sensor
+ */
+
+class SCP1000 {
+public:
+    enum OperationMode {
+        CANCEL = 0x00,
+        HIGH_SPEED_MODE = 0x09,
+        HIGH_RESOLUTION_MODE = 0x0A,
+        ULTRA_LOW_POWER_MODE = 0x0B,
+        LOW_POWER = 0x0C,
+        SELF_TEST = 0x0F,
+    };
+    
+    /**
+    * creates an SCP1000 interface with specified pins
+    *
+    * @param PinName mosi SPI MOSI pin
+    * @param PinName miso SPI MISO pin
+    * @param PinName sclk SPI SCLK pin
+    * @param PinName cs SPI CS pin
+    * @param OperationMode mode Initial operation mode
+    */
+    SCP1000(PinName mosi, PinName miso, PinName sclk, PinName cs, OperationMode mode = HIGH_RESOLUTION_MODE);
+
+    ~SCP1000() {};
+
+    /**
+     * reads revision number
+     *
+     * @returns revision number
+     */
+    int revision();
+
+    /**
+     * checks if data is ready
+     *
+     * @returns true if data is ready, false otherwise
+     */
+    bool isReady();
+
+    /**
+     * performs software reset
+     */
+    void reset();
+
+    /**
+     * sets the operation mode
+     */
+    void setOperationMode(OperationMode mode);
+
+    /**
+     * performs self test
+     *
+     * @returns the result of the test (true if succeeded, false otherwise)
+     */
+    bool performSelfTest();
+
+    /**
+     * reads the current pressure
+     *
+     * @param waitForDataReady if true, it will wait until data becomes ready to read
+     *
+     * @returns pressure in hectopascal (hPa)
+     */
+    float readPressure(bool waitForDataReady = false);
+
+    /**
+     * reads the current temperature
+     *
+     * @param waitForDataReady if true, it will wait until data becomes ready to read
+     *
+     * @returns temperature in Celsius
+     */
+    float readTemperature(bool waitForDataReady = false);
+
+private:
+    enum RegisterName {
+        REVID = 0x00,         // ASIC revision number
+        OPERATION = 0x03,     // Operation register
+        OPSTATUS = 0x04,      // Operation status
+        RSTR = 0x06,          // ASIC software reset
+        STATUS = 0x07,        // ASIC top-level status
+        DATARD8 = 0x1F,       // Pressure output data (MSB)
+        DATARD16 = 0x20,      // Pressure output data (LSB, 16 bits)
+        TEMPOUT = 0x21,       // Temperature output data (16 bits)
+    };
+
+    enum Command {
+        READ = 0x00,          // SCP1000 READ command
+        WRITE = 0x02,         // SCP1000 WRITE command
+    };
+
+    SPI spi;
+    DigitalOut selectPin;
+
+    int readRegister(RegisterName registerName, bool twoBytes = 0);
+    void writeRegister(RegisterName registerName, char value);
+};
+
+#endif
\ No newline at end of file