![](/media/cache/profiles/a7bf3f5462cc82062e41b3a2262e1a21.50x50_q85.jpg)
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
owTemp.cpp
- Committer:
- pwheels
- Date:
- 2011-03-24
- Revision:
- 0:1193dbfe28e2
File content as of revision 0:1193dbfe28e2:
//--------------------------------------------------------------------------- // 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. //--------------------------------------------------------------------------- // // temp.c - Application to find and read the 1-Wire Net // DS1920/DS1820/DS18S20 - temperature measurement. // // This application uses the files from the 'Public Domain' // 1-Wire Net libraries ('general' and 'userial'). // // // Version: 2.00 // #include <stdlib.h> #include <stdio.h> #include "owTemp.h" #include "ownet.h" #include "readDS1920.h" #include "findtype.h" // defines #define MAXDEVICES 20 // global serial numbers uchar FamilySN[MAXDEVICES][8]; // variables int family_code; owTemp::owTemp () { } void PrintSerialNum(uchar* buffer) { int i; for(i=7; i>=0; i--) { printf("%02X", buffer[i]); } } //---------------------------------------------------------------------- // Main Test for DS1920/DS1820 temperature measurement // void owTemp::Maingettemp( void ) { float current_temp; int i = 0; int NumDevices=0; int portnum = 0; //---------------------------------------- // Introduction header printf("\r\n/---------------------------------------------\r\n"); printf(" Temperature application DS1920/DS1820 - Version 1.00 \r\n" " The following is a test to exercise a DS1920/DS1820.\r\n" " Temperature Find and Read from a: \r\n" " DS1920/DS1820 (at least 1)\r\n\r\n"); printf(" Press any CTRL-C to stop this program.\r\n\r\n"); printf(" Output [Serial Number(s) ........ Temp1(F)] \r\n\r\n"); // attempt to acquire the 1-Wire Net portnum = owAcquireEx("1"); // success printf("Port opened: %i\r\n", portnum); // Find the device(s) NumDevices = FindDevices(portnum, &FamilySN[0], 0x10, MAXDEVICES); if (NumDevices>0) { printf("\r\n"); printf("Device(s) Found: \r\n"); for (i = 0; i < NumDevices; i++) { PrintSerialNum(FamilySN[i]); printf("\r\n"); } printf("\r\n\r\n"); while (1) { // read the temperature and print serial number and temperature for (i = 0; i < NumDevices; i++) { if (ReadTemperature(portnum, FamilySN[i],¤t_temp)) { float far = current_temp * 9.0 / 5.0 + 32.0; PrintSerialNum(FamilySN[i]); printf(" %5.1f Degrees Farenheight\r\n", far); // converting temperature from Celsius to Fahrenheit } else printf(" Error reading temperature, verify device present:%d\r\n", (int)owVerify(portnum, FALSE)); } printf("\r\n"); } } else printf("\r\n\r\n\r\nERROR, device DS1920/DS1820 not found!\r\n"); // release the 1-Wire Net owRelease(portnum); }