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147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/*
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* Copyright (c) 2010, STMicroelectronics.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki OS
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \file
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* Accelerometer.
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* \author
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* Salvatore Pitrulli <salvopitru@users.sourceforge.net>
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*/
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/*---------------------------------------------------------------------------*/
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#include "dev/acc-sensor.h"
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#include "mems.h"
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#include "sys/clock.h"
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#define FALSE 0
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#define TRUE 1
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/*---------------------------------------------------------------------------*/
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static int
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active(void)
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{
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int8u reg;
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if(!i2c_read_reg (kLIS3L02DQ_SLAVE_ADDR,CTRL_REG1, ®, 1))
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return FALSE;
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return (reg & 0x40) ? TRUE : FALSE ;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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int8s i2c_data = 0;
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int8u reg_addr;
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switch(type) {
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case ACC_X_AXIS:
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reg_addr = OUTX_H;
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break;
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case ACC_Y_AXIS:
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reg_addr = OUTY_H;
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break;
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case ACC_Z_AXIS:
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reg_addr = OUTZ_H;
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break;
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default:
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return 0;
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}
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i2c_read_reg(kLIS3L02DQ_SLAVE_ADDR, reg_addr, (int8u *)&i2c_data, 1);
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if(MEMS_GetFullScale()==ACC_HIGH_RANGE){
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return ((int16s)i2c_data)*HIGH_RANGE_SENSITIVITY;
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}
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else {
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return ((int16s)i2c_data)*LOW_RANGE_SENSITIVITY;
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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switch(type) {
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case SENSORS_HW_INIT:
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return Mems_Init();
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case SENSORS_ACTIVE:
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if(value){
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if(MEMS_On()){
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clock_wait(8);
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return 1;
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}
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return 0;
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}
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else
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return MEMS_Off();
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case ACC_RANGE:
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return MEMS_SetFullScale((boolean)value);
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case ACC_HPF:
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if(value < ACC_HPF_DISABLE){
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return i2c_write_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, (1<<4) | (int8u)value);
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}
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else {
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return i2c_write_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
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}
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_READY:
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return active();
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(acc_sensor, ACC_SENSOR,
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value, configure, status);
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