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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
Diff: findtype.cpp
- Revision:
- 0:1193dbfe28e2
diff -r 000000000000 -r 1193dbfe28e2 findtype.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/findtype.cpp Thu Mar 24 17:21:29 2011 +0000 @@ -0,0 +1,78 @@ +//--------------------------------------------------------------------------- +// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES +// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +// OTHER DEALINGS IN THE SOFTWARE. +// +// Except as contained in this notice, the name of Dallas Semiconductor +// shall not be used except as stated in the Dallas Semiconductor +// Branding Policy. +//--------------------------------------------------------------------------- +// +// findtype.c - Test module to find all devices of one type. +// +// Version: 2.00 +// +//---------------------------------------------------------------------- +// +// +#include "ownet.h" +#include "./Headers/findtype.h" + +//---------------------------------------------------------------------- +// Search for devices +// +// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to +// indicate the symbolic port number. +// 'FamilySN' - an array of all the serial numbers with the matching +// family code +// 'family_code' - the family code of the devices to search for on the +// 1-Wire Net +// 'MAXDEVICES' - the maximum number of devices to look for with the +// family code passed. +// +// Returns: TRUE(1) success, device type found +// FALSE(0) device not found +// +SMALLINT FindDevices(int portnum, uchar FamilySN[][8], SMALLINT family_code, int MAXDEVICES) +{ + int NumDevices=0; + + // find the devices + // set the search to first find that family code + owFamilySearchSetup(portnum,family_code); + + // loop to find all of the devices up to MAXDEVICES + NumDevices = 0; + do + { + // perform the search + if (!owNext(portnum,TRUE, FALSE)) + break; + + owSerialNum(portnum,FamilySN[NumDevices], TRUE); + if ((FamilySN[NumDevices][0] & 0x7F) == (family_code & 0x7F)) + { + NumDevices++; + } + } + while (NumDevices < (MAXDEVICES - 1)); + + // check if not at least 1 device + return NumDevices; +}