HMC5843_lib - Private HMC5843 library

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Private HMC5843 library

HMC5843.cpp@0:63ccd7376105, 2011-01-07 (annotated)

Committer:: atommota
Date:: Fri Jan 07 19:12:42 2011 +0000
Revision:: 0:63ccd7376105

Who changed what in which revision?

User	Revision	Line number	New contents of line
atommota	0:63ccd7376105	1	/**
atommota	0:63ccd7376105	2	* @author Jose R. Padron
atommota	0:63ccd7376105	3	*@author Used HMCHMC6352 library developed by Aaron Berk as template
atommota	0:63ccd7376105	4	* @section LICENSE
atommota	0:63ccd7376105	5	*
atommota	0:63ccd7376105	6	* Copyright (c) 2010 ARM Limited
atommota	0:63ccd7376105	7	*
atommota	0:63ccd7376105	8	* Permission is hereby granted, free of charge, to any person obtaining a copy
atommota	0:63ccd7376105	9	* of this software and associated documentation files (the "Software"), to deal
atommota	0:63ccd7376105	10	* in the Software without restriction, including without limitation the rights
atommota	0:63ccd7376105	11	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
atommota	0:63ccd7376105	12	* copies of the Software, and to permit persons to whom the Software is
atommota	0:63ccd7376105	13	* furnished to do so, subject to the following conditions:
atommota	0:63ccd7376105	14	*
atommota	0:63ccd7376105	15	* The above copyright notice and this permission notice shall be included in
atommota	0:63ccd7376105	16	* all copies or substantial portions of the Software.
atommota	0:63ccd7376105	17	*
atommota	0:63ccd7376105	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
atommota	0:63ccd7376105	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
atommota	0:63ccd7376105	20	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
atommota	0:63ccd7376105	21	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
atommota	0:63ccd7376105	22	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
atommota	0:63ccd7376105	23	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
atommota	0:63ccd7376105	24	* THE SOFTWARE.
atommota	0:63ccd7376105	25	*
atommota	0:63ccd7376105	26	* @section DESCRIPTION
atommota	0:63ccd7376105	27	*
atommota	0:63ccd7376105	28	* Honeywell HMC5843digital compass.
atommota	0:63ccd7376105	29	*
atommota	0:63ccd7376105	30	* Datasheet:
atommota	0:63ccd7376105	31	*
atommota	0:63ccd7376105	32	* http://www.ssec.honeywell.com/magnetic/datasheets/HMC5843.pdf
atommota	0:63ccd7376105	33	*/
atommota	0:63ccd7376105	34
atommota	0:63ccd7376105	35	/**
atommota	0:63ccd7376105	36	* Includes
atommota	0:63ccd7376105	37	*/
atommota	0:63ccd7376105	38	#include "HMC5843.h"
atommota	0:63ccd7376105	39
atommota	0:63ccd7376105	40	HMC5843::HMC5843(PinName sda, PinName scl) {
atommota	0:63ccd7376105	41
atommota	0:63ccd7376105	42	i2c_ = new I2C(sda, scl);
atommota	0:63ccd7376105	43	//100KHz, as specified by the datasheet.
atommota	0:63ccd7376105	44	i2c_->frequency(100000);
atommota	0:63ccd7376105	45
atommota	0:63ccd7376105	46
atommota	0:63ccd7376105	47	}
atommota	0:63ccd7376105	48
atommota	0:63ccd7376105	49
atommota	0:63ccd7376105	50	void HMC5843::write(int address, int data) {
atommota	0:63ccd7376105	51
atommota	0:63ccd7376105	52	char tx[2];
atommota	0:63ccd7376105	53
atommota	0:63ccd7376105	54	tx[0]=address;
atommota	0:63ccd7376105	55	tx[1]=data;
atommota	0:63ccd7376105	56
atommota	0:63ccd7376105	57	i2c_->write(HMC5843_I2C_WRITE,tx,2);
atommota	0:63ccd7376105	58
atommota	0:63ccd7376105	59	wait_ms(100);
atommota	0:63ccd7376105	60
atommota	0:63ccd7376105	61	}
atommota	0:63ccd7376105	62
atommota	0:63ccd7376105	63
atommota	0:63ccd7376105	64	void HMC5843::setSleepMode() {
atommota	0:63ccd7376105	65
atommota	0:63ccd7376105	66	write(HMC5843_MODE, HMC5843_SLEEP);
atommota	0:63ccd7376105	67	}
atommota	0:63ccd7376105	68
atommota	0:63ccd7376105	69	void HMC5843::setDefault(void) {
atommota	0:63ccd7376105	70
atommota	0:63ccd7376105	71	write(HMC5843_CONFIG_A,HMC5843_10HZ_NORMAL);
atommota	0:63ccd7376105	72	write(HMC5843_CONFIG_B,HMC5843_1_0GA);
atommota	0:63ccd7376105	73	write(HMC5843_MODE,HMC5843_CONTINUOUS);
atommota	0:63ccd7376105	74	wait_ms(100);
atommota	0:63ccd7376105	75	}
atommota	0:63ccd7376105	76
atommota	0:63ccd7376105	77	//void HMC5843::SelfTest() {
atommota	0:63ccd7376105	78
atommota	0:63ccd7376105	79	//Future
atommota	0:63ccd7376105	80
atommota	0:63ccd7376105	81	//}
atommota	0:63ccd7376105	82
atommota	0:63ccd7376105	83
atommota	0:63ccd7376105	84	void HMC5843::getAddress(char *buffer) {
atommota	0:63ccd7376105	85
atommota	0:63ccd7376105	86	char rx[3];
atommota	0:63ccd7376105	87	char tx[1];
atommota	0:63ccd7376105	88	tx[0]=HMC5843_IDENT_A;
atommota	0:63ccd7376105	89
atommota	0:63ccd7376105	90
atommota	0:63ccd7376105	91	i2c_->write(HMC5843_I2C_WRITE, tx,1);
atommota	0:63ccd7376105	92
atommota	0:63ccd7376105	93	wait_ms(1);
atommota	0:63ccd7376105	94
atommota	0:63ccd7376105	95	i2c_->read(HMC5843_I2C_READ,rx,3);
atommota	0:63ccd7376105	96
atommota	0:63ccd7376105	97	buffer[0]=rx[0];
atommota	0:63ccd7376105	98	buffer[1]=rx[1];
atommota	0:63ccd7376105	99	buffer[2]=rx[2];
atommota	0:63ccd7376105	100	}
atommota	0:63ccd7376105	101
atommota	0:63ccd7376105	102
atommota	0:63ccd7376105	103
atommota	0:63ccd7376105	104	void HMC5843::setOpMode(int mode, int ConfigA, int ConfigB) {
atommota	0:63ccd7376105	105
atommota	0:63ccd7376105	106
atommota	0:63ccd7376105	107	write(HMC5843_CONFIG_A,ConfigA);
atommota	0:63ccd7376105	108	write(HMC5843_CONFIG_B,ConfigB);
atommota	0:63ccd7376105	109	write(HMC5843_MODE,mode);
atommota	0:63ccd7376105	110
atommota	0:63ccd7376105	111
atommota	0:63ccd7376105	112	}
atommota	0:63ccd7376105	113
atommota	0:63ccd7376105	114
atommota	0:63ccd7376105	115
atommota	0:63ccd7376105	116
atommota	0:63ccd7376105	117	void HMC5843::readData(int* readings) {
atommota	0:63ccd7376105	118
atommota	0:63ccd7376105	119
atommota	0:63ccd7376105	120	char tx[1];
atommota	0:63ccd7376105	121	char rx[2];
atommota	0:63ccd7376105	122
atommota	0:63ccd7376105	123
atommota	0:63ccd7376105	124	tx[0]=HMC5843_X_MSB;
atommota	0:63ccd7376105	125	i2c_->write(HMC5843_I2C_READ,tx,1);
atommota	0:63ccd7376105	126	i2c_->read(HMC5843_I2C_READ,rx,2);
atommota	0:63ccd7376105	127	readings[0]= (int)rx[0]<<8\|(int)rx[1];
atommota	0:63ccd7376105	128
atommota	0:63ccd7376105	129
atommota	0:63ccd7376105	130	tx[0]=HMC5843_Y_MSB;
atommota	0:63ccd7376105	131	i2c_->write(HMC5843_I2C_READ,tx,1);
atommota	0:63ccd7376105	132	i2c_->read(HMC5843_I2C_READ,rx,2);
atommota	0:63ccd7376105	133	readings[1]= (int)rx[0]<<8\|(int)rx[1];
atommota	0:63ccd7376105	134
atommota	0:63ccd7376105	135	tx[0]=HMC5843_Z_MSB;
atommota	0:63ccd7376105	136	i2c_->write(HMC5843_I2C_READ,tx,1);
atommota	0:63ccd7376105	137	i2c_->read(HMC5843_I2C_READ,rx,2);
atommota	0:63ccd7376105	138	readings[2]= (int)rx[0]<<8\|(int)rx[1];
atommota	0:63ccd7376105	139
atommota	0:63ccd7376105	140
atommota	0:63ccd7376105	141	//readings[0] = (int)buffer[0] << 8 \| (int)buffer[1];
atommota	0:63ccd7376105	142	//readings[1] = (int)buffer[2] << 8 \| (int)buffer[3];
atommota	0:63ccd7376105	143	//readings[2] = (int)buffer[4] << 8 \| (int)buffer[5];
atommota	0:63ccd7376105	144
atommota	0:63ccd7376105	145	// readings[0]=buffer[0];
atommota	0:63ccd7376105	146	//readings[1]=buffer[1];
atommota	0:63ccd7376105	147	// readings[2]=buffer[2];
atommota	0:63ccd7376105	148	// readings[3]=buffer[3];
atommota	0:63ccd7376105	149	// readings[4]=buffer[4];
atommota	0:63ccd7376105	150	// readings[5]=buffer[5];
atommota	0:63ccd7376105	151	}

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Type:	Library
Created:	07 Jan 2011
Imports:	9
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

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HMC5843.cpp@0:63ccd7376105, 2011-01-07 (annotated)

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