Mike R / Mbed 2 deprecated Pinscape_Controller_V2

An I/O controller for virtual pinball machines: accelerometer nudge sensing, analog plunger input, button input encoding, LedWiz compatible output controls, and more.

Dependencies:   mbed FastIO FastPWM USBDevice

Fork of Pinscape_Controller by Mike R

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MMA8451Q Class Reference
Public Member Functions

MMA8451Q Class Reference

MMA8451Q accelerometer example. More...

#include <MMA8451Q.h>

Public Member Functions

 MMA8451Q (PinName sda, PinName scl, int addr)
 MMA8451Q constructor.
 ~MMA8451Q ()
 MMA8451Q destructor.
void init ()
 Reset the accelerometer hardware and set our initial parameters.
void standby ()
 Enter standby mode.
void active ()
 Enter active mode.
uint8_t getWhoAmI ()
 Get the value of the WHO_AM_I register.
float getAccX ()
 Get X axis acceleration.
float getAccY ()
 Get Y axis acceleration.
void getAccXY (float &x, float &y)
 Read an X,Y pair.
void getAccXYZ (float &x, float &y, float &z)
 Read X,Y,Z as floats.
void getAccXYZ (int &x, int &y, int &z)
 Read X,Y,Z as integers.
float getAccZ ()
 Get Z axis acceleration.
void getAccAllAxis (float *res)
 Get XYZ axis acceleration.
void setInterruptMode (int pin)
 Set interrupt mode.
void setRange (int g)
 Set the hardware dynamic range, in G.
void clearInterruptMode ()
 Disable interrupts.
bool sampleReady ()
 Is a sample ready?
int getFIFOCount ()
 Get the number of FIFO samples available.

Detailed Description

MMA8451Q accelerometer example. 

 #include "mbed.h"
 #include "MMA8451Q.h"
 
 #define MMA8451_I2C_ADDRESS (0x1d<<1)
 
 int main(void) {
 
 MMA8451Q acc(P_E25, P_E24, MMA8451_I2C_ADDRESS);
 PwmOut rled(LED_RED);
 PwmOut gled(LED_GREEN);
 PwmOut bled(LED_BLUE);
 
     while (true) {       
         rled = 1.0 - abs(acc.getAccX());
         gled = 1.0 - abs(acc.getAccY());
         bled = 1.0 - abs(acc.getAccZ());
         wait(0.1);
     }
 }

Definition at line 49 of file MMA8451Q.h.

Constructor & Destructor Documentation

MMA8451Q ( PinName  sda,
PinName  scl,
int  addr 
)

MMA8451Q constructor.

Parameters:
sdaSDA pin
sdlSCL pin
addraddr of the I2C peripheral

Definition at line 89 of file MMA8451Q.cpp.

~MMA8451Q (  )

MMA8451Q destructor.

Definition at line 150 of file MMA8451Q.cpp.

Member Function Documentation

void active (  )

Enter active mode.

Definition at line 246 of file MMA8451Q.cpp.

void clearInterruptMode (  )

Disable interrupts.

Definition at line 197 of file MMA8451Q.cpp.

void getAccAllAxis ( float *  res )

Get XYZ axis acceleration.

Parameters:
resarray where acceleration data will be stored

Definition at line 321 of file MMA8451Q.cpp.

float getAccX (  )

Get X axis acceleration.

Returns:
X axis acceleration

Definition at line 263 of file MMA8451Q.cpp.

void getAccXY ( float &  x,
float &  y 
)

Read an X,Y pair.

Definition at line 267 of file MMA8451Q.cpp.

void getAccXYZ ( float &  x,
float &  y,
float &  z 
)

Read X,Y,Z as floats.

This is the second most efficient way to fetch all three axes (after the integer version), since it fetches all axes in a single I2C transaction.

Definition at line 282 of file MMA8451Q.cpp.

void getAccXYZ ( int &  x,
int &  y,
int &  z 
)

Read X,Y,Z as integers.

This reads the three axes in a single I2C transaction and returns them in the native integer scale, so it's the most efficient way to read the current 3D status. Each axis value is represented an an integer using the device's native 14-bit scale, so each is in the range -8192..+8191.

Definition at line 301 of file MMA8451Q.cpp.

float getAccY (  )

Get Y axis acceleration.

Returns:
Y axis acceleration

Definition at line 313 of file MMA8451Q.cpp.

float getAccZ (  )

Get Z axis acceleration.

Returns:
Z axis acceleration

Definition at line 317 of file MMA8451Q.cpp.

int getFIFOCount (  )

Get the number of FIFO samples available.

Definition at line 159 of file MMA8451Q.cpp.

uint8_t getWhoAmI (  )

Get the value of the WHO_AM_I register.

Returns:
WHO_AM_I value

Definition at line 257 of file MMA8451Q.cpp.

void init (  )

Reset the accelerometer hardware and set our initial parameters.

Definition at line 99 of file MMA8451Q.cpp.

bool sampleReady (  )

Is a sample ready?

Definition at line 152 of file MMA8451Q.cpp.

void setInterruptMode ( int  pin )

Set interrupt mode.

'pin' is 1 for INT1_ACCEL (PTA14) and 2 for INT2_ACCEL (PTA15). The caller is responsible for setting up an interrupt handler on the corresponding PTAxx pin.

Definition at line 166 of file MMA8451Q.cpp.

void setRange ( int  g )

Set the hardware dynamic range, in G.

Valid ranges are 2, 4, and 8.

Definition at line 210 of file MMA8451Q.cpp.

void standby (  )

Enter standby mode.

Definition at line 230 of file MMA8451Q.cpp.

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