Jurica Resetar / MMA8452

MMA8452Q, 3-axis, 12-bit/8-bit digital accelerometer library. Developed by aconno dev team. For example program with the library, contact us.

Dependents:   acd52832_BLE_VF_GeoBeacon

mma8452.h@2:ba3e65007adf, 2017-09-18 (annotated)

Committer:
jurica238814
Date:
Mon Sep 18 10:08:51 2017 +0000
Revision:
2:ba3e65007adf
Parent:
1:bda670d7a481 
Some small changes.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jurica238814 0:65b19bf1382a 1 /*
jurica238814 0:65b19bf1382a 2 * Library for mma8452 3-Axis, 12-bit/8-bit, Digital Accelerometer
jurica238814 0:65b19bf1382a 3 * Made by Jurica Resetar
jurica238814 0:65b19bf1382a 4 * jurica_resetar@yahoo.com
jurica238814 0:65b19bf1382a 5 *
jurica238814 0:65b19bf1382a 6 * All rights reserved
jurica238814 0:65b19bf1382a 7 */
jurica238814 0:65b19bf1382a 8
jurica238814 0:65b19bf1382a 9 #include "mbed.h"
jurica238814 0:65b19bf1382a 10
jurica238814 0:65b19bf1382a 11 #define SA0 1
jurica238814 0:65b19bf1382a 12 #if SA0
jurica238814 1:bda670d7a481 13 #define MMA8452_ADDRESS (0x1D << 1) // SA0 is high, 0x1C if low. Shifting address by 1 bit as i2c is a 7 bit encoding, and this is 8bit encoded
jurica238814 0:65b19bf1382a 14 #else
jurica238814 1:bda670d7a481 15 #define MMA8452_ADDRESS (0x1C << 1) // SA0 is high, 0x1C if low. Shifting address by 1 bit as i2c is a 7 bit encoding, and this is 8bit encoded
jurica238814 0:65b19bf1382a 16 #endif
jurica238814 0:65b19bf1382a 17
jurica238814 0:65b19bf1382a 18 #define STATUS 0x00 // Type 'read' : Real time status, should return 0x00
jurica238814 0:65b19bf1382a 19 #define OUT_X_MSB 0x01 // Type 'read' : x axis - 8 most significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 20 #define OUT_X_LSB 0x02 // Type 'read' : x axis - 4 least significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 21 #define OUT_Y_MSB 0x03 // Type 'read' : y axis - 8 most significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 22 #define OUT_Y_LSB 0x04 // Type 'read' : y axis - 4 least significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 23 #define OUT_Z_MSB 0x05 // Type 'read' : z axis - 8 most significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 24 #define OUT_Z_LSB 0x06 // Type 'read' : z axis - 4 least significatn bit of a 12 bit sample
jurica238814 0:65b19bf1382a 25
jurica238814 0:65b19bf1382a 26 #define SYSMOD 0x0B // Type 'read' : This tells you if device is active, sleep or standy 0x00=STANDBY 0x01=WAKE 0x02=SLEEP
jurica238814 0:65b19bf1382a 27 #define WHO_AM_I 0x0D // Type 'read' : This should return the device id of 0x2A
jurica238814 0:65b19bf1382a 28
jurica238814 0:65b19bf1382a 29 #define PL_STATUS 0x10 // Type 'read' : This shows portrait landscape mode orientation
jurica238814 0:65b19bf1382a 30 #define PL_CFG 0x11 // Type 'read/write' : This allows portrait landscape configuration
jurica238814 0:65b19bf1382a 31 #define PL_COUNT 0x12 // Type 'read' : This is the portraint landscape debounce counter
jurica238814 0:65b19bf1382a 32 #define PL_BF_ZCOMP 0x13 // Type 'read' :
jurica238814 0:65b19bf1382a 33 #define PL_THS_REG 0x14 // Type 'read' :
jurica238814 0:65b19bf1382a 34
jurica238814 0:65b19bf1382a 35 #define FF_MT_CFG 0X15 // Type 'read/write' : Freefaul motion functional block configuration
jurica238814 0:65b19bf1382a 36 #define FF_MT_SRC 0X16 // Type 'read' : Freefaul motion event source register
jurica238814 0:65b19bf1382a 37 #define FF_MT_THS 0X17 // Type 'read' : Freefaul motion threshold register
jurica238814 2:ba3e65007adf 38 #define FF_COUNT 0X18 // Type 'read' : Freefaul motion debouce counter
jurica238814 0:65b19bf1382a 39
jurica238814 0:65b19bf1382a 40 #define ASLP_COUNT 0x29 // Type 'read/write' : Counter settings for auto sleep
jurica238814 0:65b19bf1382a 41 #define CTRL_REG_1 0x2A // Type 'read/write' :
jurica238814 0:65b19bf1382a 42 #define CTRL_REG_2 0x2B // Type 'read/write' :
jurica238814 0:65b19bf1382a 43 #define CTRL_REG_3 0x2C // Type 'read/write' :
jurica238814 0:65b19bf1382a 44 #define CTRL_REG_4 0x2D // Type 'read/write' :
jurica238814 0:65b19bf1382a 45 #define CTRL_REG_5 0x2E // Type 'read/write' :
jurica238814 0:65b19bf1382a 46
jurica238814 0:65b19bf1382a 47 // Defined in table 13 of the Freescale PDF
jurica238814 0:65b19bf1382a 48 #define STANDBY 0x00 // State value returned after a SYSMOD request, it can be in state STANDBY, WAKE or SLEEP
jurica238814 0:65b19bf1382a 49 #define WAKE 0x01 // State value returned after a SYSMOD request, it can be in state STANDBY, WAKE or SLEEP
jurica238814 0:65b19bf1382a 50 #define SLEEP 0x02 // State value returned after a SYSMOD request, it can be in state STANDBY, WAKE or SLEEP
jurica238814 0:65b19bf1382a 51 #define ACTIVE 0x01 // Stage value returned and set in Control Register 1, it can be STANDBY=00, or ACTIVE=01
jurica238814 0:65b19bf1382a 52
jurica238814 0:65b19bf1382a 53
jurica238814 0:65b19bf1382a 54
jurica238814 0:65b19bf1382a 55 #define TILT_STATUS 0x03 // Tilt Status (Read only)
jurica238814 0:65b19bf1382a 56 #define SRST_STATUS 0x04 // Sample Rate Status Register (Read only)
jurica238814 0:65b19bf1382a 57 #define SPCNT_STATUS 0x05 // Sleep Count Register (Read/Write)
jurica238814 0:65b19bf1382a 58 #define INTSU_STATUS 0x06 // Interrupt Setup Register
jurica238814 0:65b19bf1382a 59 #define MODE_STATUS 0x07 // Mode Register (Read/Write)
jurica238814 0:65b19bf1382a 60 #define SR_STATUS 0x08 // Auto-Wake and Active Mode Portrait/Landscape Samples per Seconds Register (Read/Write)
jurica238814 0:65b19bf1382a 61 #define PDET_STATUS 0x09 // Tap/Pulse Detection Register (Read/Write)
jurica238814 0:65b19bf1382a 62 #define PD_STATUS 0xA // Tap/Pulse Debounce Count Register (Read/Write)
jurica238814 0:65b19bf1382a 63
jurica238814 0:65b19bf1382a 64
jurica238814 0:65b19bf1382a 65 class Acc_MMA8452{
jurica238814 0:65b19bf1382a 66 public:
jurica238814 0:65b19bf1382a 67 Acc_MMA8452(PinName sda, PinName scl, char address);
jurica238814 0:65b19bf1382a 68 ~Acc_MMA8452();
jurica238814 0:65b19bf1382a 69 //uint8_tinit();
jurica238814 0:65b19bf1382a 70 uint8_t set_register(char reg, char data);
jurica238814 0:65b19bf1382a 71 uint8_t get_register(char reg, char *data);
jurica238814 0:65b19bf1382a 72 uint8_t get_x_acc(char *data);
jurica238814 0:65b19bf1382a 73 uint8_t get_y_acc(char *data);
jurica238814 0:65b19bf1382a 74 uint8_t get_z_acc(char *data);
jurica238814 0:65b19bf1382a 75
jurica238814 0:65b19bf1382a 76 char acc_address;
jurica238814 0:65b19bf1382a 77
jurica238814 0:65b19bf1382a 78 private:
jurica238814 0:65b19bf1382a 79 I2C i2c;
jurica238814 0:65b19bf1382a 80 };
jurica238814 0:65b19bf1382a 81