mma745x.c File Reference

#include <string.h>
#include <stdlib.h>
#include <compiler.h>
#include <cfg/os.h>
#include <sys/heap.h>
#include <sys/timer.h>
#include <sys/event.h>
#include <dev/gpio.h>
#include <dev/twif.h>
#include <dev/mma745x.h>

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Defines
#define	MPRINTF(...)
#define	FFLUSH(...)
#define	SGN10BIT   0x0200
#define	Con2Cpl(v)   if (v & SGN10BIT) { v ^= ~SGN10BIT; v += SGN10BIT; }
Functions
int	Mma745xWrite (uint_fast8_t reg, void *val, size_t len)
int	Mma745xRead (uint_fast8_t reg, void *val, size_t len)
int	Mma745xReadVal8 (mma8bit_t *val)
int	Mma745xReadVal10 (uint8_t ofs, mma10bit_t *val)
int	Mma745xReadG (mma10bit_t *val)
int	Mma745xReadCal (mma10bit_t *cal)
int	Mma745xWriteCal (mma10bit_t *cal)
int	Mma745xCtl (uint_fast8_t fkt, void *val)
int	Mma745xInit (uint_fast8_t selftest, mmaInit_t *init)
Variables
const mmaInit_t	mmaDefault

---

Define Documentation

#define MPRINTF

(

...

)

Referenced by Mma745xCtl(), and Mma745xInit().

#define FFLUSH

(

...

)

#define SGN10BIT   0x0200

#define Con2Cpl

(

v

)

if (v & SGN10BIT) { v ^= ~SGN10BIT; v += SGN10BIT; }

Referenced by Mma745xReadVal10().

---

Function Documentation

int Mma745xWrite	(	uint_fast8_t	reg,
		void *	val,
		size_t	len
	)

brief write to MMA7455L via I2C.

Write one byte to a register in the sensor. reg Register in sensor to address. val Pointer to value to write.

Returns:

0 if success, -1 on error.

References I2C_SLA_MMA745x, and TwMasterRegWrite.

Referenced by Mma745xCtl(), Mma745xInit(), and Mma745xWriteCal().

int Mma745xRead	(	uint_fast8_t	reg,
		void *	val,
		size_t	len
	)

brief read from MMA7455L via I2C.

Read one byte from a register in the sensor. reg Register in sensor to address. val Pointer to store the value.

Returns:

0 if success, -1 on error.

References I2C_SLA_MMA745x, and TwMasterRegRead.

Referenced by Mma745xCtl(), Mma745xReadVal10(), and Mma745xReadVal8().

int Mma745xReadVal8

(

mma8bit_t *

val

)

bief read all axes of the sensor as raw value.

This function read the current sensor values. Depending on the setup the values are in range of: 2g Mode: -2g..0g..2g -> 0x80..0x00..0x7f 4g Mode: -4g..0g..4g -> 0x80..0x00..0x7f 8g Mode: -8g..0g..8g -> 0x80..0x00..0x7f

para Pointer to mma8bit_t struct to store results in. result 0 if request was successfull, else -1;

References MMA745x_REG_XOUT8, and Mma745xRead().

Referenced by Mma745xReadG().

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int Mma745xReadVal10	(	uint8_t	ofs,
		mma10bit_t *	val
	)

bief read all axes of the sensor as raw value.

This function read the current sensor values. Depending on the setup the values are in range of: 8g Mode: -8g..0g..8g -> 0x0200..0x0000..0x01ff

para Pointer to mma8bit_t struct to store results in. result 0 if request was successfull, else -1;

References Con2Cpl, Mma745xRead(), mma10bit_t::x, mma10bit_t::y, and mma10bit_t::z.

Referenced by Mma745xReadCal().

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int Mma745xReadG

(

mma10bit_t *

val

)

References MMA745X_MCTL_GLVL_2G, MMA745X_MCTL_GLVL_4G, MMA745X_MCTL_GLVL_8G, MMA745X_MCTL_GLVL_MSK, Mma745xReadVal8(), mmaInit_t::rMODE, mma10bit_t::x, mma8bit_t::x, mma10bit_t::y, mma8bit_t::y, mma10bit_t::z, and mma8bit_t::z.

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int Mma745xReadCal

(

mma10bit_t *

cal

)

References MMA745x_REG_XOFFL, and Mma745xReadVal10().

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int Mma745xWriteCal

(

mma10bit_t *

cal

)

References MMA745x_REG_XOFFL, and Mma745xWrite().

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int Mma745xCtl	(	uint_fast8_t	fkt,
		void *	val
	)

References MMA745x_INTRST_MSK, MMA745x_REG_DETSRC, MMA745x_REG_INTRST, MMA745x_REG_MCTL, MMA745x_REG_STATUS, Mma745xRead(), Mma745xWrite(), MMA_CLR_IRQ, MMA_GET_IRQ, MMA_GET_STATE, MMA_SET_IRQ, MMA_SET_MODE, MPRINTF, and mmaInit_t::rMODE.

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int Mma745xInit	(	uint_fast8_t	selftest,
		mmaInit_t *	init
	)

brief MMA7455L Initialization

Configure GPIO connections and preset MMA7455L registers.

Returns:

0 if success, -1 on error.

References GPIO_CFG_PULLUP, GpioPinConfigSet(), memcpy(), MMA745X_MCTL_STON, MMA745x_REG_MCTL, Mma745xWrite(), MPRINTF, NULL, and NutHeapAlloc.

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Variable Documentation

const mmaInit_t mmaDefault

Initial value:

 {
         MMA745X_MODE,
       0x00,
     0x00 ,
     0x00,
        127, 
        24, 
         100, 
          0, 
             0, 
}