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owTemp.cpp@1:dcf2f8359398, 2010-12-08 (annotated)

Committer:: svlach
Date:: Wed Dec 08 21:23:21 2010 +0000
Revision:: 1:dcf2f8359398

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User	Revision	Line number	New contents of line
svlach	1:dcf2f8359398	1	//---------------------------------------------------------------------------
svlach	1:dcf2f8359398	2	// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
svlach	1:dcf2f8359398	3	//
svlach	1:dcf2f8359398	4	//
svlach	1:dcf2f8359398	5	// Permission is hereby granted, free of charge, to any person obtaining a
svlach	1:dcf2f8359398	6	// copy of this software and associated documentation files (the "Software"),
svlach	1:dcf2f8359398	7	// to deal in the Software without restriction, including without limitation
svlach	1:dcf2f8359398	8	// the rights to use, copy, modify, merge, publish, distribute, sublicense,
svlach	1:dcf2f8359398	9	// and/or sell copies of the Software, and to permit persons to whom the
svlach	1:dcf2f8359398	10	// Software is furnished to do so, subject to the following conditions:
svlach	1:dcf2f8359398	11	//
svlach	1:dcf2f8359398	12	// The above copyright notice and this permission notice shall be included
svlach	1:dcf2f8359398	13	// in all copies or substantial portions of the Software.
svlach	1:dcf2f8359398	14	//
svlach	1:dcf2f8359398	15	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
svlach	1:dcf2f8359398	16	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
svlach	1:dcf2f8359398	17	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
svlach	1:dcf2f8359398	18	// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
svlach	1:dcf2f8359398	19	// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
svlach	1:dcf2f8359398	20	// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
svlach	1:dcf2f8359398	21	// OTHER DEALINGS IN THE SOFTWARE.
svlach	1:dcf2f8359398	22	//
svlach	1:dcf2f8359398	23	// Except as contained in this notice, the name of Dallas Semiconductor
svlach	1:dcf2f8359398	24	// shall not be used except as stated in the Dallas Semiconductor
svlach	1:dcf2f8359398	25	// Branding Policy.
svlach	1:dcf2f8359398	26	//---------------------------------------------------------------------------
svlach	1:dcf2f8359398	27	//
svlach	1:dcf2f8359398	28	// temp.c - Application to find and read the 1-Wire Net
svlach	1:dcf2f8359398	29	// DS1920/DS1820/DS18S20 - temperature measurement.
svlach	1:dcf2f8359398	30	//
svlach	1:dcf2f8359398	31	// This application uses the files from the 'Public Domain'
svlach	1:dcf2f8359398	32	// 1-Wire Net libraries ('general' and 'userial').
svlach	1:dcf2f8359398	33	//
svlach	1:dcf2f8359398	34	//
svlach	1:dcf2f8359398	35	// Version: 2.00
svlach	1:dcf2f8359398	36	//
svlach	1:dcf2f8359398	37
svlach	1:dcf2f8359398	38	#include <stdlib.h>
svlach	1:dcf2f8359398	39	#include <stdio.h>
svlach	1:dcf2f8359398	40	#include "owTemp.h"
svlach	1:dcf2f8359398	41	#include "ownet.h"
svlach	1:dcf2f8359398	42	#include "readDS1920.h"
svlach	1:dcf2f8359398	43	#include "findtype.h"
svlach	1:dcf2f8359398	44
svlach	1:dcf2f8359398	45	// defines
svlach	1:dcf2f8359398	46	#define MAXDEVICES 20
svlach	1:dcf2f8359398	47
svlach	1:dcf2f8359398	48	// global serial numbers
svlach	1:dcf2f8359398	49	uchar FamilySN[MAXDEVICES][8];
svlach	1:dcf2f8359398	50
svlach	1:dcf2f8359398	51	// variables
svlach	1:dcf2f8359398	52	int family_code;
svlach	1:dcf2f8359398	53
svlach	1:dcf2f8359398	54
svlach	1:dcf2f8359398	55
svlach	1:dcf2f8359398	56	owTemp::owTemp ()
svlach	1:dcf2f8359398	57	{
svlach	1:dcf2f8359398	58
svlach	1:dcf2f8359398	59
svlach	1:dcf2f8359398	60	}
svlach	1:dcf2f8359398	61
svlach	1:dcf2f8359398	62
svlach	1:dcf2f8359398	63	void PrintSerialNum(uchar* buffer)
svlach	1:dcf2f8359398	64	{
svlach	1:dcf2f8359398	65	int i;
svlach	1:dcf2f8359398	66	for(i=7; i>=0; i--)
svlach	1:dcf2f8359398	67	{
svlach	1:dcf2f8359398	68	printf("%02X", buffer[i]);
svlach	1:dcf2f8359398	69	}
svlach	1:dcf2f8359398	70	}
svlach	1:dcf2f8359398	71
svlach	1:dcf2f8359398	72
svlach	1:dcf2f8359398	73	//----------------------------------------------------------------------
svlach	1:dcf2f8359398	74	// Main Test for DS1920/DS1820 temperature measurement
svlach	1:dcf2f8359398	75	//
svlach	1:dcf2f8359398	76	void owTemp::Maingettemp( void )
svlach	1:dcf2f8359398	77	{
svlach	1:dcf2f8359398	78	float current_temp;
svlach	1:dcf2f8359398	79	int i = 0;
svlach	1:dcf2f8359398	80	int NumDevices=0;
svlach	1:dcf2f8359398	81	int portnum = 0;
svlach	1:dcf2f8359398	82
svlach	1:dcf2f8359398	83
svlach	1:dcf2f8359398	84	//----------------------------------------
svlach	1:dcf2f8359398	85	// Introduction header
svlach	1:dcf2f8359398	86	printf("\r\n/---------------------------------------------\r\n");
svlach	1:dcf2f8359398	87	printf(" Temperature application DS1920/DS1820 - Version 1.00 \r\n"
svlach	1:dcf2f8359398	88	" The following is a test to exercise a DS1920/DS1820.\r\n"
svlach	1:dcf2f8359398	89	" Temperature Find and Read from a: \r\n"
svlach	1:dcf2f8359398	90	" DS1920/DS1820 (at least 1)\r\n\r\n");
svlach	1:dcf2f8359398	91
svlach	1:dcf2f8359398	92	printf(" Press any CTRL-C to stop this program.\r\n\r\n");
svlach	1:dcf2f8359398	93	printf(" Output [Serial Number(s) ........ Temp1(F)] \r\n\r\n");
svlach	1:dcf2f8359398	94
svlach	1:dcf2f8359398	95	// attempt to acquire the 1-Wire Net
svlach	1:dcf2f8359398	96	portnum = owAcquireEx("1");
svlach	1:dcf2f8359398	97
svlach	1:dcf2f8359398	98	// success
svlach	1:dcf2f8359398	99	printf("Port opened: %i\r\n", portnum);
svlach	1:dcf2f8359398	100
svlach	1:dcf2f8359398	101	// Find the device(s)
svlach	1:dcf2f8359398	102	NumDevices = FindDevices(portnum, &FamilySN[0], 0x10, MAXDEVICES);
svlach	1:dcf2f8359398	103
svlach	1:dcf2f8359398	104	if (NumDevices>0)
svlach	1:dcf2f8359398	105	{
svlach	1:dcf2f8359398	106	printf("\r\n");
svlach	1:dcf2f8359398	107	printf("Device(s) Found: \r\n");
svlach	1:dcf2f8359398	108	for (i = 0; i < NumDevices; i++)
svlach	1:dcf2f8359398	109	{
svlach	1:dcf2f8359398	110	PrintSerialNum(FamilySN[i]);
svlach	1:dcf2f8359398	111	printf("\r\n");
svlach	1:dcf2f8359398	112	}
svlach	1:dcf2f8359398	113	printf("\r\n\r\n");
svlach	1:dcf2f8359398	114
svlach	1:dcf2f8359398	115	while (1)
svlach	1:dcf2f8359398	116	{
svlach	1:dcf2f8359398	117	// read the temperature and print serial number and temperature
svlach	1:dcf2f8359398	118	for (i = 0; i < NumDevices; i++)
svlach	1:dcf2f8359398	119	{
svlach	1:dcf2f8359398	120	if (ReadTemperature(portnum, FamilySN[i],&current_temp))
svlach	1:dcf2f8359398	121	{
svlach	1:dcf2f8359398	122	float far = current_temp * 9.0 / 5.0 + 32.0;
svlach	1:dcf2f8359398	123	PrintSerialNum(FamilySN[i]);
svlach	1:dcf2f8359398	124	printf(" %5.1f Degrees Farenheight\r\n", far);
svlach	1:dcf2f8359398	125	// converting temperature from Celsius to Fahrenheit
svlach	1:dcf2f8359398	126	}
svlach	1:dcf2f8359398	127	else
svlach	1:dcf2f8359398	128	printf(" Error reading temperature, verify device present:%d\r\n",
svlach	1:dcf2f8359398	129	(int)owVerify(portnum, FALSE));
svlach	1:dcf2f8359398	130	}
svlach	1:dcf2f8359398	131	printf("\r\n");
svlach	1:dcf2f8359398	132	}
svlach	1:dcf2f8359398	133
svlach	1:dcf2f8359398	134	}
svlach	1:dcf2f8359398	135	else
svlach	1:dcf2f8359398	136	printf("\r\n\r\n\r\nERROR, device DS1920/DS1820 not found!\r\n");
svlach	1:dcf2f8359398	137
svlach	1:dcf2f8359398	138	// release the 1-Wire Net
svlach	1:dcf2f8359398	139	owRelease(portnum);
svlach	1:dcf2f8359398	140	}
svlach	1:dcf2f8359398	141

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Type:	Library
Created:	30 Nov 2010
Imports:	2
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	0
Followers:	1

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owTemp.cpp@1:dcf2f8359398, 2010-12-08 (annotated)

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