Paul van der Wielen
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
findtype.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 | // Permission is hereby granted, free of charge, to any person obtaining a |
| pwheels | 0:1193dbfe28e2 | 5 | // copy of this software and associated documentation files (the "Software"), |
| pwheels | 0:1193dbfe28e2 | 6 | // to deal in the Software without restriction, including without limitation |
| pwheels | 0:1193dbfe28e2 | 7 | // the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| pwheels | 0:1193dbfe28e2 | 8 | // and/or sell copies of the Software, and to permit persons to whom the |
| pwheels | 0:1193dbfe28e2 | 9 | // Software is furnished to do so, subject to the following conditions: |
| pwheels | 0:1193dbfe28e2 | 10 | // |
| pwheels | 0:1193dbfe28e2 | 11 | // The above copyright notice and this permission notice shall be included |
| pwheels | 0:1193dbfe28e2 | 12 | // in all copies or substantial portions of the Software. |
| pwheels | 0:1193dbfe28e2 | 13 | // |
| pwheels | 0:1193dbfe28e2 | 14 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| pwheels | 0:1193dbfe28e2 | 15 | // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| pwheels | 0:1193dbfe28e2 | 16 | // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| pwheels | 0:1193dbfe28e2 | 17 | // IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES |
| pwheels | 0:1193dbfe28e2 | 18 | // OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| pwheels | 0:1193dbfe28e2 | 19 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| pwheels | 0:1193dbfe28e2 | 20 | // OTHER DEALINGS IN THE SOFTWARE. |
| pwheels | 0:1193dbfe28e2 | 21 | // |
| pwheels | 0:1193dbfe28e2 | 22 | // Except as contained in this notice, the name of Dallas Semiconductor |
| pwheels | 0:1193dbfe28e2 | 23 | // shall not be used except as stated in the Dallas Semiconductor |
| pwheels | 0:1193dbfe28e2 | 24 | // Branding Policy. |
| pwheels | 0:1193dbfe28e2 | 25 | //--------------------------------------------------------------------------- |
| pwheels | 0:1193dbfe28e2 | 26 | // |
| pwheels | 0:1193dbfe28e2 | 27 | // findtype.c - Test module to find all devices of one type. |
| pwheels | 0:1193dbfe28e2 | 28 | // |
| pwheels | 0:1193dbfe28e2 | 29 | // Version: 2.00 |
| pwheels | 0:1193dbfe28e2 | 30 | // |
| pwheels | 0:1193dbfe28e2 | 31 | //---------------------------------------------------------------------- |
| pwheels | 0:1193dbfe28e2 | 32 | // |
| pwheels | 0:1193dbfe28e2 | 33 | // |
| pwheels | 0:1193dbfe28e2 | 34 | #include "ownet.h" |
| pwheels | 0:1193dbfe28e2 | 35 | #include "./Headers/findtype.h" |
| pwheels | 0:1193dbfe28e2 | 36 | |
| pwheels | 0:1193dbfe28e2 | 37 | //---------------------------------------------------------------------- |
| pwheels | 0:1193dbfe28e2 | 38 | // Search for devices |
| pwheels | 0:1193dbfe28e2 | 39 | // |
| pwheels | 0:1193dbfe28e2 | 40 | // 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to |
| pwheels | 0:1193dbfe28e2 | 41 | // indicate the symbolic port number. |
| pwheels | 0:1193dbfe28e2 | 42 | // 'FamilySN' - an array of all the serial numbers with the matching |
| pwheels | 0:1193dbfe28e2 | 43 | // family code |
| pwheels | 0:1193dbfe28e2 | 44 | // 'family_code' - the family code of the devices to search for on the |
| pwheels | 0:1193dbfe28e2 | 45 | // 1-Wire Net |
| pwheels | 0:1193dbfe28e2 | 46 | // 'MAXDEVICES' - the maximum number of devices to look for with the |
| pwheels | 0:1193dbfe28e2 | 47 | // family code passed. |
| pwheels | 0:1193dbfe28e2 | 48 | // |
| pwheels | 0:1193dbfe28e2 | 49 | // Returns: TRUE(1) success, device type found |
| pwheels | 0:1193dbfe28e2 | 50 | // FALSE(0) device not found |
| pwheels | 0:1193dbfe28e2 | 51 | // |
| pwheels | 0:1193dbfe28e2 | 52 | SMALLINT FindDevices(int portnum, uchar FamilySN[][8], SMALLINT family_code, int MAXDEVICES) |
| pwheels | 0:1193dbfe28e2 | 53 | { |
| pwheels | 0:1193dbfe28e2 | 54 | int NumDevices=0; |
| pwheels | 0:1193dbfe28e2 | 55 | |
| pwheels | 0:1193dbfe28e2 | 56 | // find the devices |
| pwheels | 0:1193dbfe28e2 | 57 | // set the search to first find that family code |
| pwheels | 0:1193dbfe28e2 | 58 | owFamilySearchSetup(portnum,family_code); |
| pwheels | 0:1193dbfe28e2 | 59 | |
| pwheels | 0:1193dbfe28e2 | 60 | // loop to find all of the devices up to MAXDEVICES |
| pwheels | 0:1193dbfe28e2 | 61 | NumDevices = 0; |
| pwheels | 0:1193dbfe28e2 | 62 | do |
| pwheels | 0:1193dbfe28e2 | 63 | { |
| pwheels | 0:1193dbfe28e2 | 64 | // perform the search |
| pwheels | 0:1193dbfe28e2 | 65 | if (!owNext(portnum,TRUE, FALSE)) |
| pwheels | 0:1193dbfe28e2 | 66 | break; |
| pwheels | 0:1193dbfe28e2 | 67 | |
| pwheels | 0:1193dbfe28e2 | 68 | owSerialNum(portnum,FamilySN[NumDevices], TRUE); |
| pwheels | 0:1193dbfe28e2 | 69 | if ((FamilySN[NumDevices][0] & 0x7F) == (family_code & 0x7F)) |
| pwheels | 0:1193dbfe28e2 | 70 | { |
| pwheels | 0:1193dbfe28e2 | 71 | NumDevices++; |
| pwheels | 0:1193dbfe28e2 | 72 | } |
| pwheels | 0:1193dbfe28e2 | 73 | } |
| pwheels | 0:1193dbfe28e2 | 74 | while (NumDevices < (MAXDEVICES - 1)); |
| pwheels | 0:1193dbfe28e2 | 75 | |
| pwheels | 0:1193dbfe28e2 | 76 | // check if not at least 1 device |
| pwheels | 0:1193dbfe28e2 | 77 | return NumDevices; |
| pwheels | 0:1193dbfe28e2 | 78 | } |