Diff: FXOS8700CQ/FXOS8700CQ.h

Revision:

15:b867a6620f96

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FXOS8700CQ/FXOS8700CQ.h	Tue Apr 23 17:09:47 2019 +0000
@@ -0,0 +1,87 @@
+/** @file FXOS8700CQ.h
+
+@ brief FXOS8700CQ Library
+
+@author Dr Craig A. Evans
+@brief (c) University of Leeds, Jan 2017
+
+@code
+
+#include "mbed.h"
+#include "FXOS8700CQ.h"
+
+// create object and specifiy pins
+FXOS8700CQ device(I2C_SDA,I2C_SCL);
+
+int main()
+{
+    // call initialisation method
+    device.init();
+
+    while (1) {
+        
+        // poll the sensor and get the values, storing in a struct
+        Data values = device.get_values();
+        
+        // print each struct member over serial
+        printf("ax = %f ay = %f az = %f | mx = %f my = %f mz = %f\n"
+               ,values.ax, values.ay, values.az
+               ,values.mx, values.my, values.mz);
+        
+        wait(0.5);
+    }
+}
+
+@endcode
+
+*/
+
+#ifndef FXOS8700CQ_H
+#define FXOS8700CQ_H
+
+#include "mbed.h"
+
+// mbed API uses 8-bit addresses so need to left-shift 7-bit addresses by 1
+#define FXOS8700CQ_ADDR   (0x1D << 1)    // for K64F board
+// values from 13.2 datasheet
+#define FXOS8700CQ_STATUS 0x00
+#define FXOS8700CQ_WHO_AM_I 0x0D
+#define FXOS8700CQ_XYZ_DATA_CFG 0x0E
+#define FXOS8700CQ_CTRL_REG1 0x2A
+#define FXOS8700CQ_M_CTRL_REG1 0x5B
+#define FXOS8700CQ_M_CTRL_REG2 0x5C
+#define FXOS8700CQ_WHO_AM_I_VAL 0xC7
+#define FXOS8700CQ_READ_LEN 13
+
+#define PI 3.14159265359f
+#define RAD2DEG 57.2957795131f
+
+struct Data {
+    float ax;
+    float ay;
+    float az;
+    float mx;
+    float my;
+    float mz;
+};
+
+class FXOS8700CQ
+{
+
+public:
+    FXOS8700CQ(PinName sda, PinName scl);
+    ~FXOS8700CQ();
+    void init();
+    Data get_values();
+    float get_pitch_angle();
+    float get_roll_angle();
+
+private:
+    I2C* i2c;
+
+    void send_byte_to_reg(char byte,char reg);
+    char read_byte_from_reg(char reg);
+    void read_bytes_from_reg(char reg,int number_of_bytes,char bytes[]);
+};
+
+#endif
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