Kenji Arai / ADXL345

Analog Devices 3-axis accelerometer. I2C interface

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ADXL345 Class Reference
Public Member Functions

ADXL345 Class Reference

Interface for Analog Devices : 3-axis accelerometer Chip: ADXL345. More...

#include <ADXL345.h>

Public Member Functions

 ADXL345 (PinName p_sda, PinName p_scl, uint8_t addr, uint8_t data_rate, uint8_t fullscale)
 Configure data pin (with other devices on I2C line)
 ADXL345 (PinName p_sda, PinName p_scl, uint8_t addr)
 Configure data pin (with other devices on I2C line)
 ADXL345 (PinName p_sda, PinName p_scl)
 Configure data pin (with other devices on I2C line)
 ADXL345 (I2C &p_i2c, uint8_t addr, uint8_t data_rate, uint8_t fullscale)
 Configure data pin (with other devices on I2C line)
 ADXL345 (I2C &p_i2c, uint8_t addr)
 Configure data pin (with other devices on I2C line)
 ADXL345 (I2C &p_i2c)
 Configure data pin (with other devices on I2C line)
void read_data (float *dt_usr)
 Read a float type data from acc.
void read_mg_data (float *dt_usr)
 Read a float type data from acc.
void read_g_data (float *dt_usr)
 Read a float type data from acc.
uint8_t read_id ()
 Read a acc ID number.
bool data_ready ()
 Read Data Ready flag.
void frequency (int hz)
 Set I2C clock frequency.
uint8_t read_reg (uint8_t addr)
 Read register (general purpose)
void write_reg (uint8_t addr, uint8_t data)
 Write register (general purpose)
void debug_print (void)
 data print for debug
void self_test (void)
 Self-Test Feature.

Detailed Description

Interface for Analog Devices : 3-axis accelerometer Chip: ADXL345. 

 #include "mbed.h"

 // I2C Communication
 I2C i2c(D14,D15);  // SDA, SCL
 ADXL345 acc(i2c);

 int main() {
  float f[3];
   while(1){
      acc.read_data(f);
   }
 }

Definition at line 118 of file ADXL345.h.

Constructor & Destructor Documentation

ADXL345 ( PinName  p_sda,
PinName  p_scl,
uint8_t  addr,
uint8_t  data_rate,
uint8_t  fullscale 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2CPinName SDA &SDL
deviceaddress
outputdata rate selection, power down mode, 0.1Hz to 3.2KHz
fullscale selection, +/-2g to +/-16g

Definition at line 34 of file ADXL345.cpp.

ADXL345 ( PinName  p_sda,
PinName  p_scl,
uint8_t  addr 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition
deviceaddress

Definition at line 42 of file ADXL345.cpp.

ADXL345 ( PinName  p_sda,
PinName  p_scl 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition

Definition at line 49 of file ADXL345.cpp.

ADXL345 ( I2C &  p_i2c,
uint8_t  addr,
uint8_t  data_rate,
uint8_t  fullscale 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition
deviceaddress
outputdata rate selection, power down mode, 0.1Hz to 3.2KHz
fullscale selection, +/-2g to +/-16g

Definition at line 59 of file ADXL345.cpp.

ADXL345 ( I2C &  p_i2c,
uint8_t  addr 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition output data rate selection = 100Hz full scale selection = +/-2g

Definition at line 66 of file ADXL345.cpp.

ADXL345 ( I2C &  p_i2c )

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition address check both G & V output data rate selection = 100Hz full scale selection = +/-2g

Definition at line 72 of file ADXL345.cpp.

Member Function Documentation

bool data_ready (  )

Read Data Ready flag.

Parameters:
none
Returns:
true = Ready

Definition at line 202 of file ADXL345.cpp.

void debug_print ( void   )

data print for debug

Parameters:
none
Returns:
none

Definition at line 243 of file ADXL345.cpp.

void frequency ( int  hz )

Set I2C clock frequency.

Parameters:
freq.
Returns:
none

Definition at line 217 of file ADXL345.cpp.

void read_data ( float *  dt_usr )

Read a float type data from acc.

Parameters:
floattype of three arry's address, e.g. float dt_usr[3];
Returns:
acc motion data unit: m/s/s(m/s2)
dt_usr[0]->x, dt_usr[1]->y, dt_usr[2]->z

Definition at line 164 of file ADXL345.cpp.

void read_g_data ( float *  dt_usr )

Read a float type data from acc.

Parameters:
floattype of three arry's address, e.g. float dt_usr[3];
Returns:
acc motion data unit: g
dt_usr[0]->x, dt_usr[1]->y, dt_usr[2]->z

Definition at line 159 of file ADXL345.cpp.

uint8_t read_id (  )

Read a acc ID number.

Parameters:
none
Returns:
ID is okay (I_AM_ ADXL345(0x33)) or not

Definition at line 194 of file ADXL345.cpp.

void read_mg_data ( float *  dt_usr )

Read a float type data from acc.

Parameters:
floattype of three arry's address, e.g. float dt_usr[3];
Returns:
acc motion data unit: mg
dt_usr[0]->x, dt_usr[1]->y, dt_usr[2]->z

Definition at line 154 of file ADXL345.cpp.

uint8_t read_reg ( uint8_t  addr )

Read register (general purpose)

Parameters:
register'saddress
Returns:
register data

Definition at line 222 of file ADXL345.cpp.

void self_test ( void   )

Self-Test Feature.

Parameters:
none
Returns:
none

Definition at line 282 of file ADXL345.cpp.

void write_reg ( uint8_t  addr,
uint8_t  data 
)

Write register (general purpose)

Parameters:
register'saddress
data
Returns:
none

Definition at line 234 of file ADXL345.cpp.

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