1-Wire - 1-Wire implementation, using DS2480B controller i…

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Paul van der Wielen / Mbed 2 deprecated 1-Wire

1-Wire implementation, using DS2480B controller interfaced with serial port, working example to read DS18B20, based on work already in progress / Dallas - Public domain code

Dependencies: mbed

owTemp.cpp@0:1193dbfe28e2, 2011-03-24 (annotated)

Committer:: pwheels
Date:: Thu Mar 24 17:21:29 2011 +0000
Revision:: 0:1193dbfe28e2

Who changed what in which revision?

User	Revision	Line number	New contents of line
pwheels	0:1193dbfe28e2	1	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	2	// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
pwheels	0:1193dbfe28e2	3	//
pwheels	0:1193dbfe28e2	4	//
pwheels	0:1193dbfe28e2	5	// Permission is hereby granted, free of charge, to any person obtaining a
pwheels	0:1193dbfe28e2	6	// copy of this software and associated documentation files (the "Software"),
pwheels	0:1193dbfe28e2	7	// to deal in the Software without restriction, including without limitation
pwheels	0:1193dbfe28e2	8	// the rights to use, copy, modify, merge, publish, distribute, sublicense,
pwheels	0:1193dbfe28e2	9	// and/or sell copies of the Software, and to permit persons to whom the
pwheels	0:1193dbfe28e2	10	// Software is furnished to do so, subject to the following conditions:
pwheels	0:1193dbfe28e2	11	//
pwheels	0:1193dbfe28e2	12	// The above copyright notice and this permission notice shall be included
pwheels	0:1193dbfe28e2	13	// in all copies or substantial portions of the Software.
pwheels	0:1193dbfe28e2	14	//
pwheels	0:1193dbfe28e2	15	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
pwheels	0:1193dbfe28e2	16	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
pwheels	0:1193dbfe28e2	17	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
pwheels	0:1193dbfe28e2	18	// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
pwheels	0:1193dbfe28e2	19	// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
pwheels	0:1193dbfe28e2	20	// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
pwheels	0:1193dbfe28e2	21	// OTHER DEALINGS IN THE SOFTWARE.
pwheels	0:1193dbfe28e2	22	//
pwheels	0:1193dbfe28e2	23	// Except as contained in this notice, the name of Dallas Semiconductor
pwheels	0:1193dbfe28e2	24	// shall not be used except as stated in the Dallas Semiconductor
pwheels	0:1193dbfe28e2	25	// Branding Policy.
pwheels	0:1193dbfe28e2	26	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	27	//
pwheels	0:1193dbfe28e2	28	// temp.c - Application to find and read the 1-Wire Net
pwheels	0:1193dbfe28e2	29	// DS1920/DS1820/DS18S20 - temperature measurement.
pwheels	0:1193dbfe28e2	30	//
pwheels	0:1193dbfe28e2	31	// This application uses the files from the 'Public Domain'
pwheels	0:1193dbfe28e2	32	// 1-Wire Net libraries ('general' and 'userial').
pwheels	0:1193dbfe28e2	33	//
pwheels	0:1193dbfe28e2	34	//
pwheels	0:1193dbfe28e2	35	// Version: 2.00
pwheels	0:1193dbfe28e2	36	//
pwheels	0:1193dbfe28e2	37
pwheels	0:1193dbfe28e2	38	#include <stdlib.h>
pwheels	0:1193dbfe28e2	39	#include <stdio.h>
pwheels	0:1193dbfe28e2	40	#include "owTemp.h"
pwheels	0:1193dbfe28e2	41	#include "ownet.h"
pwheels	0:1193dbfe28e2	42	#include "readDS1920.h"
pwheels	0:1193dbfe28e2	43	#include "findtype.h"
pwheels	0:1193dbfe28e2	44
pwheels	0:1193dbfe28e2	45	// defines
pwheels	0:1193dbfe28e2	46	#define MAXDEVICES 20
pwheels	0:1193dbfe28e2	47
pwheels	0:1193dbfe28e2	48	// global serial numbers
pwheels	0:1193dbfe28e2	49	uchar FamilySN[MAXDEVICES][8];
pwheels	0:1193dbfe28e2	50
pwheels	0:1193dbfe28e2	51	// variables
pwheels	0:1193dbfe28e2	52	int family_code;
pwheels	0:1193dbfe28e2	53
pwheels	0:1193dbfe28e2	54
pwheels	0:1193dbfe28e2	55
pwheels	0:1193dbfe28e2	56	owTemp::owTemp ()
pwheels	0:1193dbfe28e2	57	{
pwheels	0:1193dbfe28e2	58
pwheels	0:1193dbfe28e2	59
pwheels	0:1193dbfe28e2	60	}
pwheels	0:1193dbfe28e2	61
pwheels	0:1193dbfe28e2	62
pwheels	0:1193dbfe28e2	63	void PrintSerialNum(uchar* buffer)
pwheels	0:1193dbfe28e2	64	{
pwheels	0:1193dbfe28e2	65	int i;
pwheels	0:1193dbfe28e2	66	for(i=7; i>=0; i--)
pwheels	0:1193dbfe28e2	67	{
pwheels	0:1193dbfe28e2	68	printf("%02X", buffer[i]);
pwheels	0:1193dbfe28e2	69	}
pwheels	0:1193dbfe28e2	70	}
pwheels	0:1193dbfe28e2	71
pwheels	0:1193dbfe28e2	72
pwheels	0:1193dbfe28e2	73	//----------------------------------------------------------------------
pwheels	0:1193dbfe28e2	74	// Main Test for DS1920/DS1820 temperature measurement
pwheels	0:1193dbfe28e2	75	//
pwheels	0:1193dbfe28e2	76	void owTemp::Maingettemp( void )
pwheels	0:1193dbfe28e2	77	{
pwheels	0:1193dbfe28e2	78	float current_temp;
pwheels	0:1193dbfe28e2	79	int i = 0;
pwheels	0:1193dbfe28e2	80	int NumDevices=0;
pwheels	0:1193dbfe28e2	81	int portnum = 0;
pwheels	0:1193dbfe28e2	82
pwheels	0:1193dbfe28e2	83
pwheels	0:1193dbfe28e2	84	//----------------------------------------
pwheels	0:1193dbfe28e2	85	// Introduction header
pwheels	0:1193dbfe28e2	86	printf("\r\n/---------------------------------------------\r\n");
pwheels	0:1193dbfe28e2	87	printf(" Temperature application DS1920/DS1820 - Version 1.00 \r\n"
pwheels	0:1193dbfe28e2	88	" The following is a test to exercise a DS1920/DS1820.\r\n"
pwheels	0:1193dbfe28e2	89	" Temperature Find and Read from a: \r\n"
pwheels	0:1193dbfe28e2	90	" DS1920/DS1820 (at least 1)\r\n\r\n");
pwheels	0:1193dbfe28e2	91
pwheels	0:1193dbfe28e2	92	printf(" Press any CTRL-C to stop this program.\r\n\r\n");
pwheels	0:1193dbfe28e2	93	printf(" Output [Serial Number(s) ........ Temp1(F)] \r\n\r\n");
pwheels	0:1193dbfe28e2	94
pwheels	0:1193dbfe28e2	95	// attempt to acquire the 1-Wire Net
pwheels	0:1193dbfe28e2	96	portnum = owAcquireEx("1");
pwheels	0:1193dbfe28e2	97
pwheels	0:1193dbfe28e2	98	// success
pwheels	0:1193dbfe28e2	99	printf("Port opened: %i\r\n", portnum);
pwheels	0:1193dbfe28e2	100
pwheels	0:1193dbfe28e2	101	// Find the device(s)
pwheels	0:1193dbfe28e2	102	NumDevices = FindDevices(portnum, &FamilySN[0], 0x10, MAXDEVICES);
pwheels	0:1193dbfe28e2	103
pwheels	0:1193dbfe28e2	104	if (NumDevices>0)
pwheels	0:1193dbfe28e2	105	{
pwheels	0:1193dbfe28e2	106	printf("\r\n");
pwheels	0:1193dbfe28e2	107	printf("Device(s) Found: \r\n");
pwheels	0:1193dbfe28e2	108	for (i = 0; i < NumDevices; i++)
pwheels	0:1193dbfe28e2	109	{
pwheels	0:1193dbfe28e2	110	PrintSerialNum(FamilySN[i]);
pwheels	0:1193dbfe28e2	111	printf("\r\n");
pwheels	0:1193dbfe28e2	112	}
pwheels	0:1193dbfe28e2	113	printf("\r\n\r\n");
pwheels	0:1193dbfe28e2	114
pwheels	0:1193dbfe28e2	115	while (1)
pwheels	0:1193dbfe28e2	116	{
pwheels	0:1193dbfe28e2	117	// read the temperature and print serial number and temperature
pwheels	0:1193dbfe28e2	118	for (i = 0; i < NumDevices; i++)
pwheels	0:1193dbfe28e2	119	{
pwheels	0:1193dbfe28e2	120	if (ReadTemperature(portnum, FamilySN[i],&current_temp))
pwheels	0:1193dbfe28e2	121	{
pwheels	0:1193dbfe28e2	122	float far = current_temp * 9.0 / 5.0 + 32.0;
pwheels	0:1193dbfe28e2	123	PrintSerialNum(FamilySN[i]);
pwheels	0:1193dbfe28e2	124	printf(" %5.1f Degrees Farenheight\r\n", far);
pwheels	0:1193dbfe28e2	125	// converting temperature from Celsius to Fahrenheit
pwheels	0:1193dbfe28e2	126	}
pwheels	0:1193dbfe28e2	127	else
pwheels	0:1193dbfe28e2	128	printf(" Error reading temperature, verify device present:%d\r\n",
pwheels	0:1193dbfe28e2	129	(int)owVerify(portnum, FALSE));
pwheels	0:1193dbfe28e2	130	}
pwheels	0:1193dbfe28e2	131	printf("\r\n");
pwheels	0:1193dbfe28e2	132	}
pwheels	0:1193dbfe28e2	133
pwheels	0:1193dbfe28e2	134	}
pwheels	0:1193dbfe28e2	135	else
pwheels	0:1193dbfe28e2	136	printf("\r\n\r\n\r\nERROR, device DS1920/DS1820 not found!\r\n");
pwheels	0:1193dbfe28e2	137
pwheels	0:1193dbfe28e2	138	// release the 1-Wire Net
pwheels	0:1193dbfe28e2	139	owRelease(portnum);
pwheels	0:1193dbfe28e2	140	}
pwheels	0:1193dbfe28e2	141

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	24 Mar 2011
Imports:	104
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	6

owTemp.cpp@0:1193dbfe28e2, 2011-03-24 (annotated)

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