git.gag.com Git - debian/cc1111/blob - device/examples/ds390/ow390/ad26.c

   1 //---------------------------------------------------------------------------
   2 // Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining a
   5 // copy of this software and associated documentation files (the "Software"),
   6 // to deal in the Software without restriction, including without limitation
   7 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 // and/or sell copies of the Software, and to permit persons to whom the
   9 // Software is furnished to do so, subject to the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be included
  12 // in all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 // MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  17 // IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
  18 // OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 // OTHER DEALINGS IN THE SOFTWARE.
  21 //
  22 // Except as contained in this notice, the name of Dallas Semiconductor
  23 // shall not be used except as stated in the Dallas Semiconductor
  24 // Branding Policy.
  25 //--------------------------------------------------------------------------
  26 //
  27 //  ad26.c - Reads the voltage on the 1-Wire
  28 //  version 1.00
  29 //
  30
  31 // Include Files
  32 #include <stdio.h>
  33 #include "ownet.h"
  34 #include "ad26.h"
  35
  36 int Volt_AD(int portnum, int vdd, uchar *SNum)
  37 {
  38    uchar send_block[50];
  39    uchar test;
  40    int send_cnt=0;
  41    int i;
  42    ushort lastcrc8;
  43    int busybyte;
  44
  45    owSerialNum(portnum,SNum,FALSE);
  46    // Recall the Status/Configuration page
  47    // Recall command
  48    send_block[send_cnt++] = 0xB8;
  49
  50    // Page to Recall
  51    send_block[send_cnt++] = 0x00;
  52
  53    if(!owBlock(portnum,FALSE,send_block,send_cnt))
  54       return FALSE;
  55
  56    send_cnt = 0;
  57
  58    if(owAccess(portnum))
  59    {
  60       // Read the Status/Configuration byte
  61       // Read scratchpad command
  62       send_block[send_cnt++] = 0xBE;
  63
  64       // Page for the Status/Configuration byte
  65       send_block[send_cnt++] = 0x00;
  66
  67       for(i=0;i<9;i++)
  68          send_block[send_cnt++] = 0xFF;
  69
  70       if(owBlock(portnum,FALSE,send_block,send_cnt))
  71       {
  72         setcrc8(portnum,0);
  73
  74          for(i=2;i<send_cnt;i++)
  75            lastcrc8 = docrc8(portnum,send_block[i]);
  76
  77          if(lastcrc8 != 0x00)
  78             return FALSE;
  79       }//Block
  80       else
  81          return FALSE;
  82
  83       test = send_block[2] & 0x08;
  84       if(((test == 0x08) && vdd) || ((test == 0x00) && !(vdd)))
  85          return TRUE;
  86    }//Access
  87
  88    if(owAccess(portnum))
  89    {
  90       send_cnt = 0;
  91       // Write the Status/Configuration byte
  92       // Write scratchpad command
  93       send_block[send_cnt++] = 0x4E;
  94
  95       // Write page
  96       send_block[send_cnt++] = 0x00;
  97
  98       if(vdd)
  99          send_block[send_cnt++] = send_block[2] | 0x08;
 100       else
 101          send_block[send_cnt++] = send_block[2] & 0xF7;
 102
 103       for(i=0;i<7;i++)
 104          send_block[send_cnt++] = send_block[i+4];
 105
 106       if(owBlock(portnum,FALSE,send_block,send_cnt))
 107       {
 108          send_cnt = 0;
 109
 110          if(owAccess(portnum))
 111          {
 112             // Copy the Status/Configuration byte
 113             // Copy scratchpad command
 114             send_block[send_cnt++] = 0x48;
 115
 116             // Copy page
 117             send_block[send_cnt++] = 0x00;
 118
 119             if(owBlock(portnum,FALSE,send_block,send_cnt))
 120             {
 121                busybyte = owReadByte(portnum);
 122
 123                while(busybyte == 0)
 124                   busybyte = owReadByte(portnum);
 125
 126                return TRUE;
 127             }//Block
 128          }//Access
 129       }//Block
 130
 131    }//Access
 132
 133    return FALSE;
 134 }
 135
 136
 137 float Volt_Reading(int portnum, int vdd, uchar *SNum)
 138 {
 139    uchar send_block[50];
 140    int send_cnt=0;
 141    int i;
 142    int busybyte;
 143    uchar lastcrc8;
 144    ushort volts;
 145    float ret=-1.0;
 146
 147    if(Volt_AD(portnum,vdd,SNum))
 148    {
 149
 150       if(owAccess(portnum))
 151       {
 152          if(!owWriteByte(portnum,0xB4))
 153          {
 154            //output_status(LV_ALWAYS,(char *)"DIDN'T WRITE CORRECTLY\n");
 155            printf ("DIDN'T WRITE CORRECTLY\n");
 156            return ret;
 157          }
 158
 159          busybyte = owReadByte(portnum);
 160
 161          while(busybyte == 0)
 162             busybyte = owReadByte(portnum);
 163       }
 164
 165       if(owAccess(portnum))
 166       {
 167          // Recall the Status/Configuration page
 168          // Recall command
 169          send_block[send_cnt++] = 0xB8;
 170
 171          // Page to Recall
 172          send_block[send_cnt++] = 0x00;
 173
 174          if(!owBlock(portnum,FALSE,send_block,send_cnt))
 175             return ret;
 176       }
 177
 178
 179       send_cnt = 0;
 180
 181       if(owAccess(portnum))
 182       {
 183          // Read the Status/Configuration byte
 184          // Read scratchpad command
 185          send_block[send_cnt++] = 0xBE;
 186
 187          // Page for the Status/Configuration byte
 188          send_block[send_cnt++] = 0x00;
 189
 190          for(i=0;i<9;i++)
 191             send_block[send_cnt++] = 0xFF;
 192
 193          if(owBlock(portnum,FALSE,send_block,send_cnt))
 194          {
 195             setcrc8(portnum,0);
 196
 197             for(i=2;i<send_cnt;i++)
 198                lastcrc8 = docrc8(portnum,send_block[i]);
 199
 200             if(lastcrc8 != 0x00)
 201                return ret;
 202
 203          }
 204          else
 205             return ret;
 206
 207          volts = ((int)send_block[6] << 8) | send_block[5];
 208          ret = (float) volts/100;
 209       }//Access
 210    }
 211
 212    return ret;
 213
 214 }
 215
 216 double Get_Temperature(int portnum,uchar *SNum)
 217 {
 218    double ret=-1.0;
 219    uchar send_block[50];
 220    int send_cnt=0;
 221    int i;
 222    uchar lastcrc8;
 223
 224    owSerialNum(portnum,SNum,FALSE);
 225
 226    if(owAccess(portnum))
 227       // Convert Temperature command
 228       owWriteByte(portnum,0x44);
 229
 230    msDelay(10);
 231
 232
 233    if(owAccess(portnum))
 234    {
 235       // Read the Status/Configuration byte
 236       // Read scratchpad command
 237       send_block[send_cnt++] = 0xBE;
 238
 239       // Page for the Status/Configuration byte
 240       send_block[send_cnt++] = 0x00;
 241
 242       for(i=0;i<9;i++)
 243          send_block[send_cnt++] = 0xFF;
 244
 245       if(owBlock(portnum,FALSE,send_block,send_cnt))
 246       {
 247          setcrc8(portnum,0);
 248
 249          for(i=2;i<send_cnt;i++) {
 250             lastcrc8 = docrc8(portnum,send_block[i]);
 251          } printf ("\n");
 252
 253          if(lastcrc8 != 0x00)
 254             return ret;
 255
 256       }
 257       else
 258          return ret;
 259
 260       ret = ((((unsigned int)send_block[4] << 8) | send_block[3]) >> 3) * 0.03125;
 261    }//Access
 262
 263    return ret;
 264 }
 265