AccelSensor.h

00001 #ifndef MBED_NOKIALCD_H
00002 #define MBED_NOKIALCD_H
00003 
00004 #include "mbed.h"
00005 
00006 //http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Accelerometers/MMA8452Q.pdf
00007 //http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Accelerometers/MMA8452Q-Breakout-v11-fixed.pdf
00008 //http://cache.freescale.com/files/sensors/doc/app_note/AN4069.pdf
00009 
00010 // The SparkFun breakout board defaults to 1, set to 0 if SA0 jumper on the bottom of the board is set
00011 #define ADDRESS 0x1D // 0x1D if SA0 is high, 0x1C if low
00012 //Define a few of the registers that we will be accessing on the MMA8452
00013 #define OUT_X_MSB 0x01 //1
00014 #define XYZ_DATA_CFG 0x0E //14
00015 #define WHO_AM_I 0x0D //13
00016 #define CTRL_REG1 0x2A //42
00017 #define GSCALE 8 // Sets full-scale range to +/-2, 4, or 8g. Used to calc real g values.
00018 
00019 class AccelSensor {
00020 public:
00021     AccelSensor(PinName sda, PinName scl);
00022     void active();
00023     void standby();
00024     void init();
00025     void readData(int *destination);
00026 private:
00027     void readRegisters(char reg, int range, char* dest);
00028     char readRegister(char reg);
00029     void writeRegister(char reg, char data);
00030     I2C _i2c;
00031 };
00032 
00033 #endif