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236 lines
7.5 KiB
C++
236 lines
7.5 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <string>
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#include <mraa/i2c.h>
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#define ADDR 0x1D // device address
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// Register names according to the datasheet.
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// Register 0x1C is sometimes called 'PW', and sometimes 'PD'.
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// The two reserved registers can not be used.
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#define MMA7455_XOUTL 0x00 // Read only, Output Value X LSB
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#define MMA7455_XOUTH 0x01 // Read only, Output Value X MSB
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#define MMA7455_YOUTL 0x02 // Read only, Output Value Y LSB
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#define MMA7455_YOUTH 0x03 // Read only, Output Value Y MSB
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#define MMA7455_ZOUTL 0x04 // Read only, Output Value Z LSB
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#define MMA7455_ZOUTH 0x05 // Read only, Output Value Z MSB
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#define MMA7455_XOUT8 0x06 // Read only, Output Value X 8 bits
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#define MMA7455_YOUT8 0x07 // Read only, Output Value Y 8 bits
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#define MMA7455_ZOUT8 0x08 // Read only, Output Value Z 8 bits
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#define MMA7455_STATUS 0x09 // Read only, Status Register
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#define MMA7455_DETSRC 0x0A // Read only, Detection Source Register
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#define MMA7455_TOUT 0x0B // Temperature Output Value (Optional)
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#define MMA7455_RESERVED1 0x0C // Reserved
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#define MMA7455_I2CAD 0x0D // Read/Write, I2C Device Address
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#define MMA7455_USRINF 0x0E // Read only, User Information (Optional)
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#define MMA7455_WHOAMI 0x0F // Read only, "Who am I" value (Optional)
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#define MMA7455_XOFFL 0x10 // Read/Write, Offset Drift X LSB
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#define MMA7455_XOFFH 0x11 // Read/Write, Offset Drift X MSB
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#define MMA7455_YOFFL 0x12 // Read/Write, Offset Drift Y LSB
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#define MMA7455_YOFFH 0x13 // Read/Write, Offset Drift Y MSB
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#define MMA7455_ZOFFL 0x14 // Read/Write, Offset Drift Z LSB
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#define MMA7455_ZOFFH 0x15 // Read/Write, Offset Drift Z MSB
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#define MMA7455_MCTL 0x16 // Read/Write, Mode Control Register
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#define MMA7455_INTRST 0x17 // Read/Write, Interrupt Latch Reset
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#define MMA7455_CTL1 0x18 // Read/Write, Control 1 Register
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#define MMA7455_CTL2 0x19 // Read/Write, Control 2 Register
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#define MMA7455_LDTH 0x1A // Read/Write, Level Detection Threshold Limit Value
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#define MMA7455_PDTH 0x1B // Read/Write, Pulse Detection Threshold Limit Value
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#define MMA7455_PD 0x1C // Read/Write, Pulse Duration Value
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#define MMA7455_LT 0x1D // Read/Write, Latency Time Value (between pulses)
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#define MMA7455_TW 0x1E // Read/Write, Time Window for Second Pulse Value
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#define MMA7455_RESERVED2 0x1F // Reserved
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// Defines for the bits, to be able to change
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// between bit number and binary definition.
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// By using the bit number, programming the MMA7455
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// is like programming an AVR microcontroller.
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// But instead of using "(1<<X)", or "_BV(X)",
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// the Arduino "bit(X)" is used.
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#define MMA7455_D0 0
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#define MMA7455_D1 1
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#define MMA7455_D2 2
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#define MMA7455_D3 3
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#define MMA7455_D4 4
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#define MMA7455_D5 5
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#define MMA7455_D6 6
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#define MMA7455_D7 7
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// Status Register
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#define MMA7455_DRDY MMA7455_D0
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#define MMA7455_DOVR MMA7455_D1
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#define MMA7455_PERR MMA7455_D2
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// Mode Control Register
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#define MMA7455_MODE0 MMA7455_D0
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#define MMA7455_MODE1 MMA7455_D1
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#define MMA7455_GLVL0 MMA7455_D2
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#define MMA7455_GLVL1 MMA7455_D3
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#define MMA7455_STON MMA7455_D4
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#define MMA7455_SPI3W MMA7455_D5
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#define MMA7455_DRPD MMA7455_D6
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// Control 1 Register
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#define MMA7455_INTPIN MMA7455_D0
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#define MMA7455_INTREG0 MMA7455_D1
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#define MMA7455_INTREG1 MMA7455_D2
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#define MMA7455_XDA MMA7455_D3
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#define MMA7455_YDA MMA7455_D4
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#define MMA7455_ZDA MMA7455_D5
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#define MMA7455_THOPT MMA7455_D6
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#define MMA7455_DFBW MMA7455_D7
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// Control 2 Register
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#define MMA7455_LDPL MMA7455_D0
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#define MMA7455_PDPL MMA7455_D1
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#define MMA7455_DRVO MMA7455_D2
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// Interrupt Latch Reset Register
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#define MMA7455_CLR_INT1 MMA7455_D0
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#define MMA7455_CLR_INT2 MMA7455_D1
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// Detection Source Register
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#define MMA7455_INT1 MMA7455_D0
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#define MMA7455_INT2 MMA7455_D1
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#define MMA7455_PDZ MMA7455_D2
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#define MMA7455_PDY MMA7455_D3
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#define MMA7455_PDX MMA7455_D4
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#define MMA7455_LDZ MMA7455_D5
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#define MMA7455_LDY MMA7455_D6
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#define MMA7455_LDX MMA7455_D7
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// I2C Device Address Register
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#define MMA7455_I2CDIS MMA7455_D7
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#define HIGH 1
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#define LOW 0
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namespace upm {
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union accelData {
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struct {
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unsigned char x_lsb;
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unsigned char x_msb;
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unsigned char y_lsb;
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unsigned char y_msb;
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unsigned char z_lsb;
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unsigned char z_msb;
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} reg;
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struct {
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short x;
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short y;
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short z;
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} value;
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};
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#define BIT(n) (1<<n)
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/**
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* @brief MMA7455 accelerometer library
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* @defgroup mma7455 libupm-mma7455
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* @ingroup generic i2c accelerometer
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*/
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/**
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* @library mma7455
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* @sensor mma7455
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* @comname MMA7455 Accelerometer Sensor
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* @type accelerometer
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* @man generic
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* @con i2c
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*
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* @brief API for MMA7455 chip (accelerometer)
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*
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* This file defines the MMA7455 interface for libmma7455
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*
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* @image html mma7455.jpg
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* @snippet mma7455.cxx Interesting
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*/
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class MMA7455 {
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public:
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/**
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* Instanciates a MMA7455 object
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*
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* @param bus number of used bus
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* @param devAddr addres of used i2c device
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*/
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MMA7455 (int bus=0, int devAddr=0x1D);
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/**
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* MMA7455 object destructor, basicaly it close i2c connection.
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*/
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~MMA7455 ();
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/**
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* Return name of the component
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*/
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std::string name()
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{
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return m_name;
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}
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/**
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* Calibrate the sensor
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*/
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mraa_result_t calibrate ();
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/**
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* Read X, Y and Z acceleration data
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*
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* @param ptrX X axis
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* @param ptrY Y axis
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* @param ptrZ Z axis
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*/
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mraa_result_t readData (short * ptrX, short * ptrY, short * ptrZ);
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/**
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*
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*
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* @param reg register address
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* @param buf register data buffer
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* @param size buffer size
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*/
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int ic2ReadReg (unsigned char reg, unsigned char * buf, unsigned char size);
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/**
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*
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*
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* @param reg register address
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* @param buf register data buffer
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* @param size buffer size
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*/
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mraa_result_t ic2WriteReg (unsigned char reg, unsigned char * buf, unsigned char size);
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private:
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std::string m_name;
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int m_controlAddr;
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int m_bus;
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mraa_i2c_context m_i2ControlCtx;
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};
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}
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