Diff: MS4525DO/MS4525DO.h

Revision:

0:5965bf423184

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MS4525DO/MS4525DO.h	Fri Sep 13 08:41:37 2019 +0000
@@ -0,0 +1,73 @@
+
+#ifndef MS4525DO_H
+#define MS4525DO_H
+
+#include "mbed.h"
+
+#define I2C_ADDRESS_MS4525DO    0x28    /**< 7-bit address =0x28. 8-bit is 0x50. Depends on the order code (this is for code "I") */
+
+/* Register address */
+#define ADDR_READ_MR            0x00    /* write to this address to start conversion */
+
+// MS4525D sensor full scale range and units
+const int16_t MS4525FullScaleRange = 1;  // 1 psi
+
+// MS4525D Sensor type (A or B) comment out the wrong type assignments
+// Type A (10% to 90%)
+const int16_t MS4525MinScaleCounts = 1638;
+const int16_t MS4525FullScaleCounts = 14746;
+
+const int16_t MS4525Span=MS4525FullScaleCounts-MS4525MinScaleCounts;
+
+//MS4525D sensor pressure style, differential or otherwise. Comment out the wrong one.
+//Differential
+const int16_t MS4525ZeroCounts=(MS4525MinScaleCounts+MS4525FullScaleCounts)/2;
+
+
+class MS4525DO
+{
+    public:
+    // instance methods
+        // explicit I2C pin names
+        MS4525DO(PinName sda, PinName sck, char slave_adr = I2C_ADDRESS_MS4525DO);
+        
+        // pin names as an object (ideal when sharing the bus)
+        MS4525DO(I2C &i2c_obj, char slave_adr = I2C_ADDRESS_MS4525DO);
+    
+        virtual ~MS4525DO();
+    
+    // public functions
+        void initialize(void);
+        int measure(void);              // returns status of measurement
+        float getPSI(void);             // returns the PSI of last measurement
+        float getTemperature(void);     // returns temperature of last measurement
+        float getAirSpeed(void);        // calculates and returns the airspeed
+        int calibrate(void);            // attempts to calibrate and returns a status code
+         
+    
+    private:
+        I2C         *i2c_p;
+        I2C         &i2c;
+        char        address;
+        char        _status;
+        float       psi;
+        float       temperature;
+        float       airspeed;
+        uint16_t    P_dat;  // 14 bit pressure data
+        uint16_t    T_dat;  // 11 bit temperature data
+        
+    // private functions
+        int collect(void);
+        char fetch_pressure(uint16_t &P_dat, uint16_t &T_dat);
+          
+    
+};  // end of the class
+
+
+/** airspeed scaling factors; out = (in * Vscale) + offset */
+struct airspeed_scale {
+    float   offset_pa;
+    float   scale;
+};
+
+#endif