109 lines
4.0 KiB
C
109 lines
4.0 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2010, Loughborough University - Computer Science
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* This file is part of the Contiki operating system.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file
|
||
|
|
* Header file used by the example demonstrating the cc2431 location
|
||
|
|
* engine.
|
||
|
|
*
|
||
|
|
* This file contains declarations of the location engine registers and
|
||
|
|
* the LOCENG register bits. It also contains some data structures used
|
||
|
|
* to store calculation parameters and reference node coordinates.
|
||
|
|
*
|
||
|
|
* This file only needs to be included bye the blind node code file.
|
||
|
|
*
|
||
|
|
* More information on the cc2431 Location Engine can be found in:
|
||
|
|
* - cc2431 Datasheet
|
||
|
|
* - K. Aamodt, "CC2431 Location Engine", Texas Instruments Application
|
||
|
|
* Note 42.
|
||
|
|
*
|
||
|
|
* \author
|
||
|
|
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "8051def.h"
|
||
|
|
#include <lint.h> /* For syntax parsers */
|
||
|
|
|
||
|
|
/* Location Engine Registers on the cc2431 */
|
||
|
|
__xdata __at (0xDF55) unsigned char REFCOORD;
|
||
|
|
__xdata __at (0xDF56) unsigned char MEASPARM;
|
||
|
|
__xdata __at (0xDF57) unsigned char LOCENG;
|
||
|
|
__xdata __at (0xDF58) unsigned char LOCX;
|
||
|
|
__xdata __at (0xDF59) unsigned char LOCY;
|
||
|
|
|
||
|
|
/* LOCENG Register Bits */
|
||
|
|
#define LOCENG_RUN 0x01
|
||
|
|
#define LOCENG_REFLD 0x02
|
||
|
|
#define LOCENG_PARLD 0x04
|
||
|
|
#define LOCENG_DONE 0x08
|
||
|
|
#define LOCENG_EN 0x10
|
||
|
|
|
||
|
|
/* cc2431 chips report 0x89 when the CHIPID register is read */
|
||
|
|
#define CC2431_CHIP_ID 0x89
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Struct for the Calculation Parameters.
|
||
|
|
* Values stored here feed the MEASPARM register.
|
||
|
|
*
|
||
|
|
* Values should be stored here in Location Engine format:
|
||
|
|
* RSSI: 0.5 Precision, without the minus sign. All 16 must be used. Use 0
|
||
|
|
* to reduce the number of ref. nodes used in the calculation.
|
||
|
|
* Value range [-95 dBm , -40 dBm]
|
||
|
|
* A: 0.5 Precision. Value range [30.0 , 50.0] (Thus [60 , 100] decimal)
|
||
|
|
* n: Use the n Index value [0 , 31] - See cc2431 datasheet, Table 2.
|
||
|
|
* delta: Must be present. If we want the calculation to be unrestricted,
|
||
|
|
* use 0xFF
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
struct meas_params {
|
||
|
|
uint8_t alpha;
|
||
|
|
uint8_t n;
|
||
|
|
uint8_t x_min;
|
||
|
|
uint8_t x_delta;
|
||
|
|
uint8_t y_min;
|
||
|
|
uint8_t y_delta;
|
||
|
|
uint8_t rssi[16];
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Store the reference node coordinates here.
|
||
|
|
* This will feed REFCOORD.
|
||
|
|
*
|
||
|
|
* Values should be stored here in Location Engine format:
|
||
|
|
* 2 LS bits for the fractional part, 0.25 precision
|
||
|
|
* 6 MS bits for the integral part.
|
||
|
|
* Value range [0 , 63.75] (thus [0 , 255])
|
||
|
|
*/
|
||
|
|
struct refcoords {
|
||
|
|
uint8_t x;
|
||
|
|
uint8_t y;
|
||
|
|
};
|