Mike Fruge / OneWire

Implementation of 1-Wire with added Alarm Search Functionality

Dependents:   Max32630_One_Wire_Interface

Masters/DS2480B/DS2480B.cpp@142:85b71cfd617e, 2019-08-13 (annotated)

Committer:
mfruge
Date:
Tue Aug 13 14:42:37 2019 +0000
Revision:
142:85b71cfd617e
Parent:
120:200109b73e3c 
Added functions to ROMCommands to add Alarm Search functionality

Who changed what in which revision?

UserRevisionLine numberNew contents of line
j3 3:644fc630f958 1 /******************************************************************//**
j3 3:644fc630f958 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
j3 3:644fc630f958 3 *
j3 3:644fc630f958 4 * Permission is hereby granted, free of charge, to any person obtaining a
j3 3:644fc630f958 5 * copy of this software and associated documentation files (the "Software"),
j3 3:644fc630f958 6 * to deal in the Software without restriction, including without limitation
j3 3:644fc630f958 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
j3 3:644fc630f958 8 * and/or sell copies of the Software, and to permit persons to whom the
j3 3:644fc630f958 9 * Software is furnished to do so, subject to the following conditions:
j3 3:644fc630f958 10 *
j3 3:644fc630f958 11 * The above copyright notice and this permission notice shall be included
j3 3:644fc630f958 12 * in all copies or substantial portions of the Software.
j3 3:644fc630f958 13 *
j3 3:644fc630f958 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
j3 3:644fc630f958 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
j3 3:644fc630f958 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
j3 3:644fc630f958 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
j3 3:644fc630f958 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
j3 3:644fc630f958 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
j3 3:644fc630f958 20 * OTHER DEALINGS IN THE SOFTWARE.
j3 3:644fc630f958 21 *
j3 3:644fc630f958 22 * Except as contained in this notice, the name of Maxim Integrated
j3 3:644fc630f958 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
j3 3:644fc630f958 24 * Products, Inc. Branding Policy.
j3 3:644fc630f958 25 *
j3 3:644fc630f958 26 * The mere transfer of this software does not imply any licenses
j3 3:644fc630f958 27 * of trade secrets, proprietary technology, copyrights, patents,
j3 3:644fc630f958 28 * trademarks, maskwork rights, or any other form of intellectual
j3 3:644fc630f958 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
j3 3:644fc630f958 30 * ownership rights.
j3 3:644fc630f958 31 **********************************************************************/
j3 3:644fc630f958 32
j3 104:3f48daed532b 33 #include "Masters/DS2480B/DS2480B.h"
IanBenzMaxim 73:2cecc1372acc 34 #include "Serial.h"
IanBenzMaxim 73:2cecc1372acc 35 #include "Timer.h"
IanBenzMaxim 73:2cecc1372acc 36 #include "wait_api.h"
j3 63:422be898443a 37
j3 63:422be898443a 38 // Mode Commands
j3 63:422be898443a 39 #define MODE_DATA 0xE1
j3 63:422be898443a 40 #define MODE_COMMAND 0xE3
j3 63:422be898443a 41 #define MODE_STOP_PULSE 0xF1
j3 63:422be898443a 42
j3 63:422be898443a 43 // Return byte value
j3 63:422be898443a 44 #define RB_CHIPID_MASK 0x1C
j3 63:422be898443a 45 #define RB_RESET_MASK 0x03
j3 63:422be898443a 46 #define RB_1WIRESHORT 0x00
j3 63:422be898443a 47 #define RB_PRESENCE 0x01
j3 63:422be898443a 48 #define RB_ALARMPRESENCE 0x02
j3 63:422be898443a 49 #define RB_NOPRESENCE 0x03
j3 63:422be898443a 50
j3 63:422be898443a 51 #define RB_BIT_MASK 0x03
j3 63:422be898443a 52 #define RB_BIT_ONE 0x03
j3 63:422be898443a 53 #define RB_BIT_ZERO 0x00
j3 63:422be898443a 54
j3 63:422be898443a 55 // Masks for all bit ranges
j3 63:422be898443a 56 #define CMD_MASK 0x80
j3 63:422be898443a 57 #define FUNCTSEL_MASK 0x60
j3 63:422be898443a 58 #define BITPOL_MASK 0x10
j3 63:422be898443a 59 #define SPEEDSEL_MASK 0x0C
j3 63:422be898443a 60 #define MODSEL_MASK 0x02
j3 63:422be898443a 61 #define PARMSEL_MASK 0x70
j3 63:422be898443a 62 #define PARMSET_MASK 0x0E
j3 63:422be898443a 63
j3 63:422be898443a 64 // Command or config bit
j3 63:422be898443a 65 #define CMD_COMM 0x81
j3 63:422be898443a 66 #define CMD_CONFIG 0x01
j3 63:422be898443a 67
j3 63:422be898443a 68 // Function select bits
j3 63:422be898443a 69 #define FUNCTSEL_BIT 0x00
j3 63:422be898443a 70 #define FUNCTSEL_SEARCHON 0x30
j3 63:422be898443a 71 #define FUNCTSEL_SEARCHOFF 0x20
j3 63:422be898443a 72 #define FUNCTSEL_RESET 0x40
j3 63:422be898443a 73 #define FUNCTSEL_CHMOD 0x60
j3 63:422be898443a 74
j3 63:422be898443a 75 // Bit polarity/Pulse voltage bits
j3 63:422be898443a 76 #define BITPOL_ONE 0x10
j3 63:422be898443a 77 #define BITPOL_ZERO 0x00
j3 63:422be898443a 78 #define BITPOL_5V 0x00
j3 63:422be898443a 79 #define BITPOL_12V 0x10
j3 63:422be898443a 80
j3 63:422be898443a 81 // One Wire speed bits
j3 63:422be898443a 82 #define SPEEDSEL_STD 0x00
j3 63:422be898443a 83 #define SPEEDSEL_FLEX 0x04
j3 63:422be898443a 84 #define SPEEDSEL_OD 0x08
j3 63:422be898443a 85 #define SPEEDSEL_PULSE 0x0C
j3 63:422be898443a 86
j3 63:422be898443a 87 // Data/Command mode select bits
j3 63:422be898443a 88 #define MODSEL_DATA 0x00
j3 63:422be898443a 89 #define MODSEL_COMMAND 0x02
j3 63:422be898443a 90
j3 63:422be898443a 91 // 5V Follow Pulse select bits
j3 63:422be898443a 92 #define PRIME5V_TRUE 0x02
j3 63:422be898443a 93 #define PRIME5V_FALSE 0x00
j3 63:422be898443a 94
j3 63:422be898443a 95 // Parameter select bits
j3 63:422be898443a 96 #define PARMSEL_PARMREAD 0x00
j3 63:422be898443a 97 #define PARMSEL_SLEW 0x10
j3 63:422be898443a 98 #define PARMSEL_12VPULSE 0x20
j3 63:422be898443a 99 #define PARMSEL_5VPULSE 0x30
j3 63:422be898443a 100 #define PARMSEL_WRITE1LOW 0x40
j3 63:422be898443a 101 #define PARMSEL_SAMPLEOFFSET 0x50
j3 63:422be898443a 102 #define PARMSEL_ACTIVEPULLUPTIME 0x60
j3 63:422be898443a 103 #define PARMSEL_BAUDRATE 0x70
j3 63:422be898443a 104
j3 63:422be898443a 105 // Pull down slew rate.
j3 63:422be898443a 106 #define PARMSET_Slew15Vus 0x00
j3 63:422be898443a 107 #define PARMSET_Slew2p2Vus 0x02
j3 63:422be898443a 108 #define PARMSET_Slew1p65Vus 0x04
j3 63:422be898443a 109 #define PARMSET_Slew1p37Vus 0x06
j3 63:422be898443a 110 #define PARMSET_Slew1p1Vus 0x08
j3 63:422be898443a 111 #define PARMSET_Slew0p83Vus 0x0A
j3 63:422be898443a 112 #define PARMSET_Slew0p7Vus 0x0C
j3 63:422be898443a 113 #define PARMSET_Slew0p55Vus 0x0E
j3 63:422be898443a 114
j3 63:422be898443a 115 // 12V programming pulse time table
j3 63:422be898443a 116 #define PARMSET_32us 0x00
j3 63:422be898443a 117 #define PARMSET_64us 0x02
j3 63:422be898443a 118 #define PARMSET_128us 0x04
j3 63:422be898443a 119 #define PARMSET_256us 0x06
j3 63:422be898443a 120 #define PARMSET_512us 0x08
j3 63:422be898443a 121 #define PARMSET_1024us 0x0A
j3 63:422be898443a 122 #define PARMSET_2048us 0x0C
j3 63:422be898443a 123 #define PARMSET_infinite 0x0E
j3 63:422be898443a 124
j3 63:422be898443a 125 // 5V strong pull up pulse time table
j3 63:422be898443a 126 #define PARMSET_16p4ms 0x00
j3 63:422be898443a 127 #define PARMSET_65p5ms 0x02
j3 63:422be898443a 128 #define PARMSET_131ms 0x04
j3 63:422be898443a 129 #define PARMSET_262ms 0x06
j3 63:422be898443a 130 #define PARMSET_524ms 0x08
j3 63:422be898443a 131 #define PARMSET_1p05s 0x0A
j3 63:422be898443a 132 #define PARMSET_dynamic 0x0C
j3 63:422be898443a 133 #define PARMSET_infinite 0x0E
j3 63:422be898443a 134
j3 63:422be898443a 135 // Write 1 low time
j3 63:422be898443a 136 #define PARMSET_Write8us 0x00
j3 63:422be898443a 137 #define PARMSET_Write9us 0x02
j3 63:422be898443a 138 #define PARMSET_Write10us 0x04
j3 63:422be898443a 139 #define PARMSET_Write11us 0x06
j3 63:422be898443a 140 #define PARMSET_Write12us 0x08
j3 63:422be898443a 141 #define PARMSET_Write13us 0x0A
j3 63:422be898443a 142 #define PARMSET_Write14us 0x0C
j3 63:422be898443a 143 #define PARMSET_Write15us 0x0E
j3 63:422be898443a 144
j3 63:422be898443a 145 // Data sample offset and Write 0 recovery time
j3 63:422be898443a 146 #define PARMSET_SampOff3us 0x00
j3 63:422be898443a 147 #define PARMSET_SampOff4us 0x02
j3 63:422be898443a 148 #define PARMSET_SampOff5us 0x04
j3 63:422be898443a 149 #define PARMSET_SampOff6us 0x06
j3 63:422be898443a 150 #define PARMSET_SampOff7us 0x08
j3 63:422be898443a 151 #define PARMSET_SampOff8us 0x0A
j3 63:422be898443a 152 #define PARMSET_SampOff9us 0x0C
j3 63:422be898443a 153 #define PARMSET_SampOff10us 0x0E
j3 63:422be898443a 154
j3 63:422be898443a 155 // Active pull up on time
j3 63:422be898443a 156 #define PARMSET_PullUp0p0us 0x00
j3 63:422be898443a 157 #define PARMSET_PullUp0p5us 0x02
j3 63:422be898443a 158 #define PARMSET_PullUp1p0us 0x04
j3 63:422be898443a 159 #define PARMSET_PullUp1p5us 0x06
j3 63:422be898443a 160 #define PARMSET_PullUp2p0us 0x08
j3 63:422be898443a 161 #define PARMSET_PullUp2p5us 0x0A
j3 63:422be898443a 162 #define PARMSET_PullUp3p0us 0x0C
j3 63:422be898443a 163 #define PARMSET_PullUp3p5us 0x0E
j3 63:422be898443a 164
j3 63:422be898443a 165 // DS2480B program voltage available
j3 63:422be898443a 166 #define DS2480BPROG_MASK 0x20
j3 63:422be898443a 167
IanBenzMaxim 76:84e6c4994e29 168 using OneWire::DS2480B;
IanBenzMaxim 76:84e6c4994e29 169 using OneWire::OneWireMaster;
j3 3:644fc630f958 170
IanBenzMaxim 109:5c9180b4be25 171 static uint32_t calculateBitTimeout(DS2480B::BaudRate baud)
IanBenzMaxim 109:5c9180b4be25 172 {
IanBenzMaxim 109:5c9180b4be25 173 // Calculate bit timeout in microsecond.
IanBenzMaxim 109:5c9180b4be25 174 // 10x the time needed to transmit or receive.
IanBenzMaxim 109:5c9180b4be25 175 // Double for 115200 due to timer inaccuracies.
IanBenzMaxim 109:5c9180b4be25 176
j3 112:82eb520a644b 177 //*100 for 10 bits/byte and ten times the time needed
j3 112:82eb520a644b 178
j3 112:82eb520a644b 179 uint32_t timeout = 1000000 * 100;
IanBenzMaxim 109:5c9180b4be25 180
IanBenzMaxim 109:5c9180b4be25 181 switch (baud)
IanBenzMaxim 109:5c9180b4be25 182 {
IanBenzMaxim 109:5c9180b4be25 183 case DS2480B::Baud115200bps:
IanBenzMaxim 109:5c9180b4be25 184 timeout = (timeout * 2) / 115200;
IanBenzMaxim 109:5c9180b4be25 185 break;
j3 3:644fc630f958 186
IanBenzMaxim 109:5c9180b4be25 187 case DS2480B::Baud57600bps:
IanBenzMaxim 109:5c9180b4be25 188 timeout /= 57600;
IanBenzMaxim 109:5c9180b4be25 189 break;
IanBenzMaxim 109:5c9180b4be25 190
IanBenzMaxim 109:5c9180b4be25 191 case DS2480B::Baud19200bps:
IanBenzMaxim 109:5c9180b4be25 192 timeout /= 19200;
IanBenzMaxim 109:5c9180b4be25 193 break;
IanBenzMaxim 109:5c9180b4be25 194
IanBenzMaxim 109:5c9180b4be25 195 case DS2480B::Baud9600bps:
IanBenzMaxim 109:5c9180b4be25 196 default:
IanBenzMaxim 109:5c9180b4be25 197 timeout /= 9600;
IanBenzMaxim 109:5c9180b4be25 198 break;
j3 3:644fc630f958 199 }
IanBenzMaxim 109:5c9180b4be25 200
IanBenzMaxim 109:5c9180b4be25 201 return timeout;
j3 3:644fc630f958 202 }
j3 3:644fc630f958 203
IanBenzMaxim 109:5c9180b4be25 204 DS2480B::DS2480B(PinName tx, PinName rx)
IanBenzMaxim 109:5c9180b4be25 205 : serial(tx, rx)
j3 63:422be898443a 206 {
IanBenzMaxim 109:5c9180b4be25 207
j3 63:422be898443a 208 }
j3 63:422be898443a 209
IanBenzMaxim 75:8b627804927c 210 OneWireMaster::CmdResult DS2480B::OWInitMaster()
j3 14:7b2886a50321 211 {
IanBenzMaxim 109:5c9180b4be25 212 return detect();
j3 14:7b2886a50321 213 }
j3 14:7b2886a50321 214
IanBenzMaxim 75:8b627804927c 215 OneWireMaster::CmdResult DS2480B::OWReset()
j3 3:644fc630f958 216 {
j3 63:422be898443a 217 OneWireMaster::CmdResult result;
j3 63:422be898443a 218
IanBenzMaxim 74:23be10c32fa3 219 uint8_t readbuffer[10], sendpacket[10];
IanBenzMaxim 74:23be10c32fa3 220 uint8_t sendlen = 0;
j3 63:422be898443a 221
j3 63:422be898443a 222 // make sure normal level
IanBenzMaxim 75:8b627804927c 223 result = OWSetLevel(OneWireMaster::NormalLevel);
IanBenzMaxim 74:23be10c32fa3 224 if (result == OneWireMaster::Success)
j3 63:422be898443a 225 {
j3 63:422be898443a 226 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 227 if (mode != MODSEL_COMMAND)
j3 63:422be898443a 228 {
IanBenzMaxim 109:5c9180b4be25 229 mode = MODSEL_COMMAND;
j3 63:422be898443a 230 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 231 }
j3 63:422be898443a 232
j3 63:422be898443a 233 // construct the command
IanBenzMaxim 109:5c9180b4be25 234 sendpacket[sendlen++] = (uint8_t)(CMD_COMM | FUNCTSEL_RESET | speed);
IanBenzMaxim 74:23be10c32fa3 235
IanBenzMaxim 109:5c9180b4be25 236 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 237 flushCom();
j3 63:422be898443a 238
j3 63:422be898443a 239 // send the packet
IanBenzMaxim 109:5c9180b4be25 240 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 241 if (result == OneWireMaster::Success)
j3 63:422be898443a 242 {
j3 63:422be898443a 243 // read back the 1 byte response
IanBenzMaxim 109:5c9180b4be25 244 result = readCom(1, readbuffer);
IanBenzMaxim 74:23be10c32fa3 245 if (result == OneWireMaster::Success)
j3 63:422be898443a 246 {
j3 63:422be898443a 247 // make sure this byte looks like a reset byte
IanBenzMaxim 74:23be10c32fa3 248 if (((readbuffer[0] & RB_RESET_MASK) == RB_PRESENCE) || ((readbuffer[0] & RB_RESET_MASK) == RB_ALARMPRESENCE))
j3 63:422be898443a 249 {
j3 63:422be898443a 250 result = OneWireMaster::Success;
j3 63:422be898443a 251 }
j3 63:422be898443a 252 else
j3 63:422be898443a 253 {
j3 63:422be898443a 254 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 255 }
j3 63:422be898443a 256 }
j3 63:422be898443a 257 }
j3 63:422be898443a 258 }
j3 63:422be898443a 259
j3 17:b646b1e3970b 260 return result;
j3 3:644fc630f958 261 }
j3 3:644fc630f958 262
IanBenzMaxim 75:8b627804927c 263 OneWireMaster::CmdResult DS2480B::OWTouchBitSetLevel(uint8_t & sendRecvBit, OWLevel afterLevel)
j3 3:644fc630f958 264 {
j3 23:e8e403d61359 265 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 266
IanBenzMaxim 74:23be10c32fa3 267 uint8_t readbuffer[10], sendpacket[10];
IanBenzMaxim 74:23be10c32fa3 268 uint8_t sendlen = 0;
j3 63:422be898443a 269
j3 63:422be898443a 270 // make sure normal level
IanBenzMaxim 75:8b627804927c 271 OWSetLevel(OneWireMaster::NormalLevel);
j3 63:422be898443a 272
j3 63:422be898443a 273 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 274 if (mode != MODSEL_COMMAND)
j3 63:422be898443a 275 {
IanBenzMaxim 109:5c9180b4be25 276 mode = MODSEL_COMMAND;
j3 63:422be898443a 277 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 278 }
j3 63:422be898443a 279
j3 63:422be898443a 280 // construct the command
IanBenzMaxim 75:8b627804927c 281 sendpacket[sendlen] = (sendRecvBit != 0) ? BITPOL_ONE : BITPOL_ZERO;
IanBenzMaxim 109:5c9180b4be25 282 sendpacket[sendlen++] |= CMD_COMM | FUNCTSEL_BIT | speed;
j3 63:422be898443a 283
j3 63:422be898443a 284 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 285 flushCom();
j3 63:422be898443a 286
j3 63:422be898443a 287 // send the packet
IanBenzMaxim 109:5c9180b4be25 288 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 289 if (result == OneWireMaster::Success)
j3 63:422be898443a 290 {
j3 63:422be898443a 291 // read back the response
IanBenzMaxim 109:5c9180b4be25 292 result = readCom(1, readbuffer);
IanBenzMaxim 74:23be10c32fa3 293 if (result == OneWireMaster::Success)
j3 63:422be898443a 294 {
j3 63:422be898443a 295 // interpret the response
j3 63:422be898443a 296 if (((readbuffer[0] & 0xE0) == 0x80) && ((readbuffer[0] & RB_BIT_MASK) == RB_BIT_ONE))
j3 63:422be898443a 297 {
IanBenzMaxim 75:8b627804927c 298 sendRecvBit = 1;
j3 63:422be898443a 299 result = OneWireMaster::Success;
j3 63:422be898443a 300 }
j3 63:422be898443a 301 else
j3 63:422be898443a 302 {
IanBenzMaxim 75:8b627804927c 303 sendRecvBit = 0;
j3 63:422be898443a 304 result = OneWireMaster::Success;
j3 63:422be898443a 305 }
j3 63:422be898443a 306 }
j3 63:422be898443a 307 else
j3 63:422be898443a 308 {
j3 63:422be898443a 309 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 310 }
j3 63:422be898443a 311 }
j3 63:422be898443a 312 else
j3 63:422be898443a 313 {
j3 63:422be898443a 314 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 315 }
j3 63:422be898443a 316
IanBenzMaxim 109:5c9180b4be25 317 if (result == OneWireMaster::Success)
j3 63:422be898443a 318 {
IanBenzMaxim 75:8b627804927c 319 result = OWSetLevel(afterLevel);
j3 63:422be898443a 320 }
j3 63:422be898443a 321
j3 17:b646b1e3970b 322 return result;
j3 3:644fc630f958 323 }
j3 3:644fc630f958 324
IanBenzMaxim 75:8b627804927c 325 OneWireMaster::CmdResult DS2480B::OWWriteByteSetLevel(uint8_t sendByte, OWLevel afterLevel)
IanBenzMaxim 26:a361e3f42ba5 326 {
IanBenzMaxim 26:a361e3f42ba5 327 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 328
IanBenzMaxim 74:23be10c32fa3 329 uint8_t readbuffer[10], sendpacket[10];
IanBenzMaxim 74:23be10c32fa3 330 uint8_t sendlen = 0;
j3 63:422be898443a 331
j3 63:422be898443a 332 // make sure normal level
IanBenzMaxim 75:8b627804927c 333 OWSetLevel(OneWireMaster::NormalLevel);
j3 63:422be898443a 334
j3 63:422be898443a 335 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 336 if (mode != MODSEL_DATA)
j3 63:422be898443a 337 {
IanBenzMaxim 109:5c9180b4be25 338 mode = MODSEL_DATA;
j3 63:422be898443a 339 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 340 }
j3 63:422be898443a 341
j3 63:422be898443a 342 // add the byte to send
IanBenzMaxim 75:8b627804927c 343 sendpacket[sendlen++] = sendByte;
j3 63:422be898443a 344
j3 63:422be898443a 345 // check for duplication of data that looks like COMMAND mode
IanBenzMaxim 75:8b627804927c 346 if (sendByte == MODE_COMMAND)
j3 63:422be898443a 347 {
IanBenzMaxim 75:8b627804927c 348 sendpacket[sendlen++] = sendByte;
j3 63:422be898443a 349 }
j3 63:422be898443a 350
j3 63:422be898443a 351 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 352 flushCom();
j3 63:422be898443a 353
j3 63:422be898443a 354 // send the packet
IanBenzMaxim 109:5c9180b4be25 355 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 356 if (result == OneWireMaster::Success)
j3 63:422be898443a 357 {
j3 63:422be898443a 358 // read back the 1 byte response
IanBenzMaxim 109:5c9180b4be25 359 result = readCom(1, readbuffer);
IanBenzMaxim 75:8b627804927c 360 if ((result == OneWireMaster::Success) && (readbuffer[0] == sendByte))
j3 63:422be898443a 361 {
j3 63:422be898443a 362 result = OneWireMaster::Success;
j3 63:422be898443a 363 }
j3 63:422be898443a 364 else
j3 63:422be898443a 365 {
j3 63:422be898443a 366 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 367 }
j3 63:422be898443a 368 }
j3 63:422be898443a 369 else
j3 63:422be898443a 370 {
j3 63:422be898443a 371 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 372 }
j3 63:422be898443a 373
IanBenzMaxim 109:5c9180b4be25 374 if (result == OneWireMaster::Success)
j3 63:422be898443a 375 {
IanBenzMaxim 75:8b627804927c 376 result = OWSetLevel(afterLevel);
j3 63:422be898443a 377 }
j3 63:422be898443a 378
IanBenzMaxim 26:a361e3f42ba5 379 return result;
IanBenzMaxim 26:a361e3f42ba5 380 }
IanBenzMaxim 26:a361e3f42ba5 381
IanBenzMaxim 75:8b627804927c 382 OneWireMaster::CmdResult DS2480B::OWReadByteSetLevel(uint8_t & recvByte, OWLevel afterLevel)
j3 3:644fc630f958 383 {
j3 23:e8e403d61359 384 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 385
IanBenzMaxim 74:23be10c32fa3 386 uint8_t readbuffer[10], sendpacket[10];
IanBenzMaxim 74:23be10c32fa3 387 uint8_t sendlen = 0;
j3 63:422be898443a 388
j3 63:422be898443a 389 // make sure normal level
IanBenzMaxim 75:8b627804927c 390 OWSetLevel(OneWireMaster::NormalLevel);
j3 63:422be898443a 391
j3 63:422be898443a 392 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 393 if (mode != MODSEL_DATA)
j3 63:422be898443a 394 {
IanBenzMaxim 109:5c9180b4be25 395 mode = MODSEL_DATA;
j3 63:422be898443a 396 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 397 }
j3 63:422be898443a 398
j3 63:422be898443a 399 // add the byte to send
j3 63:422be898443a 400 sendpacket[sendlen++] = 0xFF;
j3 63:422be898443a 401
j3 63:422be898443a 402 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 403 flushCom();
j3 63:422be898443a 404
j3 63:422be898443a 405 // send the packet
IanBenzMaxim 109:5c9180b4be25 406 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 407 if (result == OneWireMaster::Success)
j3 63:422be898443a 408 {
j3 63:422be898443a 409 // read back the 1 byte response
IanBenzMaxim 109:5c9180b4be25 410 result = readCom(1, readbuffer);
IanBenzMaxim 74:23be10c32fa3 411 if (result == OneWireMaster::Success)
j3 63:422be898443a 412 {
IanBenzMaxim 75:8b627804927c 413 recvByte = readbuffer[0];
j3 63:422be898443a 414 result = OneWireMaster::Success;
j3 63:422be898443a 415 }
j3 63:422be898443a 416 else
j3 63:422be898443a 417 {
j3 63:422be898443a 418 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 419 }
j3 63:422be898443a 420 }
j3 63:422be898443a 421 else
j3 63:422be898443a 422 {
j3 63:422be898443a 423 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 424 }
j3 63:422be898443a 425
j3 63:422be898443a 426 // an error occured so re-sync with DS2480B
IanBenzMaxim 109:5c9180b4be25 427 if (result == OneWireMaster::Success)
j3 63:422be898443a 428 {
IanBenzMaxim 75:8b627804927c 429 result = OWSetLevel(afterLevel);
j3 63:422be898443a 430 }
j3 63:422be898443a 431
j3 17:b646b1e3970b 432 return result;
j3 3:644fc630f958 433 }
j3 3:644fc630f958 434
IanBenzMaxim 75:8b627804927c 435 OneWireMaster::CmdResult DS2480B::OWSetSpeed(OWSpeed newSpeed)
j3 17:b646b1e3970b 436 {
IanBenzMaxim 109:5c9180b4be25 437 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 96:9b7b63c0105e 438
j3 96:9b7b63c0105e 439 uint8_t sendpacket[5];
j3 96:9b7b63c0105e 440 uint8_t sendlen = 0;
IanBenzMaxim 74:23be10c32fa3 441
j3 96:9b7b63c0105e 442 // check if change from current mode
IanBenzMaxim 109:5c9180b4be25 443 if (((newSpeed == OneWireMaster::OverdriveSpeed) && (speed != SPEEDSEL_OD)) ||
IanBenzMaxim 109:5c9180b4be25 444 ((newSpeed == OneWireMaster::StandardSpeed) && (speed != SPEEDSEL_STD)))
j3 96:9b7b63c0105e 445 {
j3 96:9b7b63c0105e 446 if (newSpeed == OneWireMaster::OverdriveSpeed)
j3 96:9b7b63c0105e 447 {
IanBenzMaxim 109:5c9180b4be25 448 result = changeBaud(Baud115200bps);
j3 96:9b7b63c0105e 449 if (result == OneWireMaster::Success)
j3 96:9b7b63c0105e 450 {
IanBenzMaxim 109:5c9180b4be25 451 speed = SPEEDSEL_OD;
j3 96:9b7b63c0105e 452 }
j3 96:9b7b63c0105e 453 }
j3 96:9b7b63c0105e 454 else if (newSpeed == OneWireMaster::StandardSpeed)
j3 96:9b7b63c0105e 455 {
IanBenzMaxim 109:5c9180b4be25 456 result = changeBaud(Baud9600bps);
j3 96:9b7b63c0105e 457 if (result == OneWireMaster::Success)
j3 96:9b7b63c0105e 458 {
IanBenzMaxim 109:5c9180b4be25 459 speed = SPEEDSEL_STD;
j3 96:9b7b63c0105e 460 }
j3 96:9b7b63c0105e 461 }
j3 96:9b7b63c0105e 462
j3 96:9b7b63c0105e 463 // if baud rate is set correctly then change DS2480 speed
j3 96:9b7b63c0105e 464 if (result == OneWireMaster::Success)
j3 96:9b7b63c0105e 465 {
j3 96:9b7b63c0105e 466 // check if correct mode
IanBenzMaxim 109:5c9180b4be25 467 if (mode != MODSEL_COMMAND)
j3 96:9b7b63c0105e 468 {
IanBenzMaxim 109:5c9180b4be25 469 mode = MODSEL_COMMAND;
j3 96:9b7b63c0105e 470 sendpacket[sendlen++] = MODE_COMMAND;
j3 96:9b7b63c0105e 471 }
j3 96:9b7b63c0105e 472
j3 96:9b7b63c0105e 473 // proceed to set the DS2480 communication speed
IanBenzMaxim 109:5c9180b4be25 474 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_SEARCHOFF | speed;
j3 96:9b7b63c0105e 475
j3 96:9b7b63c0105e 476 // send the packet
IanBenzMaxim 109:5c9180b4be25 477 result = writeCom(sendlen,sendpacket);
j3 96:9b7b63c0105e 478 }
j3 96:9b7b63c0105e 479 }
j3 96:9b7b63c0105e 480
j3 17:b646b1e3970b 481 return result;
j3 3:644fc630f958 482 }
j3 3:644fc630f958 483
IanBenzMaxim 75:8b627804927c 484 OneWireMaster::CmdResult DS2480B::OWSetLevel(OWLevel newLevel)
j3 3:644fc630f958 485 {
j3 63:422be898443a 486 OneWireMaster::CmdResult result = OneWireMaster::Success;
j3 63:422be898443a 487
IanBenzMaxim 74:23be10c32fa3 488 uint8_t sendpacket[10], readbuffer[10];
IanBenzMaxim 74:23be10c32fa3 489 uint8_t sendlen = 0;
j3 63:422be898443a 490
j3 63:422be898443a 491 // check if need to change level
IanBenzMaxim 109:5c9180b4be25 492 if (newLevel != level)
j3 63:422be898443a 493 {
j3 63:422be898443a 494 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 495 if (mode != MODSEL_COMMAND)
j3 63:422be898443a 496 {
IanBenzMaxim 109:5c9180b4be25 497 mode = MODSEL_COMMAND;
j3 63:422be898443a 498 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 499 }
IanBenzMaxim 74:23be10c32fa3 500
j3 63:422be898443a 501 // check if just putting back to normal
IanBenzMaxim 75:8b627804927c 502 if (newLevel == OneWireMaster::NormalLevel)
j3 63:422be898443a 503 {
j3 63:422be898443a 504 // stop pulse command
j3 63:422be898443a 505 sendpacket[sendlen++] = MODE_STOP_PULSE;
j3 63:422be898443a 506
j3 63:422be898443a 507 // add the command to begin the pulse WITHOUT prime
j3 63:422be898443a 508 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V | PRIME5V_FALSE;
j3 63:422be898443a 509
j3 63:422be898443a 510 // stop pulse command
j3 63:422be898443a 511 sendpacket[sendlen++] = MODE_STOP_PULSE;
IanBenzMaxim 74:23be10c32fa3 512
IanBenzMaxim 109:5c9180b4be25 513 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 514 flushCom();
j3 63:422be898443a 515
j3 63:422be898443a 516 // send the packet
IanBenzMaxim 109:5c9180b4be25 517 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 518 if (result == OneWireMaster::Success)
j3 63:422be898443a 519 {
j3 63:422be898443a 520 // read back the 1 byte response
IanBenzMaxim 109:5c9180b4be25 521 result = readCom(2, readbuffer);
IanBenzMaxim 74:23be10c32fa3 522 if (result == OneWireMaster::Success)
j3 63:422be898443a 523 {
j3 63:422be898443a 524 // check response byte
IanBenzMaxim 74:23be10c32fa3 525 if (((readbuffer[0] & 0xE0) == 0xE0) && ((readbuffer[1] & 0xE0) == 0xE0))
j3 63:422be898443a 526 {
IanBenzMaxim 109:5c9180b4be25 527 level = OneWireMaster::NormalLevel;
j3 63:422be898443a 528 }
j3 63:422be898443a 529 else
j3 63:422be898443a 530 {
j3 63:422be898443a 531 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 532 }
j3 63:422be898443a 533 }
j3 63:422be898443a 534 }
j3 63:422be898443a 535 }
j3 63:422be898443a 536 // set new level
IanBenzMaxim 74:23be10c32fa3 537 else
j3 63:422be898443a 538 {
j3 63:422be898443a 539 // set the SPUD time value
j3 63:422be898443a 540 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_5VPULSE | PARMSET_infinite;
j3 63:422be898443a 541 // add the command to begin the pulse
j3 63:422be898443a 542 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V;
IanBenzMaxim 74:23be10c32fa3 543
IanBenzMaxim 109:5c9180b4be25 544 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 545 flushCom();
j3 63:422be898443a 546
j3 63:422be898443a 547 // send the packet
IanBenzMaxim 109:5c9180b4be25 548 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 549 if (result == OneWireMaster::Success)
j3 63:422be898443a 550 {
j3 63:422be898443a 551 // read back the 1 byte response from setting time limit
IanBenzMaxim 109:5c9180b4be25 552 result = readCom(1, readbuffer);
IanBenzMaxim 74:23be10c32fa3 553 if (result == OneWireMaster::Success)
j3 63:422be898443a 554 {
j3 63:422be898443a 555 // check response byte
IanBenzMaxim 74:23be10c32fa3 556 if ((readbuffer[0] & 0x81) == 0)
j3 63:422be898443a 557 {
IanBenzMaxim 109:5c9180b4be25 558 level = newLevel;
j3 63:422be898443a 559 }
j3 63:422be898443a 560 else
j3 63:422be898443a 561 {
j3 63:422be898443a 562 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 563 }
j3 63:422be898443a 564 }
j3 63:422be898443a 565 }
j3 63:422be898443a 566 }
j3 63:422be898443a 567 }
j3 63:422be898443a 568
j3 63:422be898443a 569 return result;
j3 63:422be898443a 570 }
j3 63:422be898443a 571
IanBenzMaxim 109:5c9180b4be25 572 OneWireMaster::CmdResult DS2480B::detect()
j3 63:422be898443a 573 {
j3 63:422be898443a 574 OneWireMaster::CmdResult result;
j3 63:422be898443a 575
IanBenzMaxim 74:23be10c32fa3 576 uint8_t sendpacket[10], readbuffer[10];
IanBenzMaxim 74:23be10c32fa3 577 uint8_t sendlen = 0;
j3 63:422be898443a 578
j3 63:422be898443a 579 // reset modes
IanBenzMaxim 109:5c9180b4be25 580 level = OneWireMaster::NormalLevel;
IanBenzMaxim 109:5c9180b4be25 581 mode = MODSEL_COMMAND;
IanBenzMaxim 109:5c9180b4be25 582 baud = Baud9600bps;
IanBenzMaxim 109:5c9180b4be25 583 speed = SPEEDSEL_FLEX;
j3 63:422be898443a 584
j3 63:422be898443a 585 // set the baud rate to 9600
IanBenzMaxim 109:5c9180b4be25 586 setComBaud(baud);
j3 63:422be898443a 587
j3 63:422be898443a 588 // send a break to reset the DS2480B
IanBenzMaxim 109:5c9180b4be25 589 breakCom();
j3 63:422be898443a 590
j3 63:422be898443a 591 // delay to let line settle
j3 63:422be898443a 592 wait_ms(2);
IanBenzMaxim 74:23be10c32fa3 593
IanBenzMaxim 109:5c9180b4be25 594 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 595 flushCom();
j3 63:422be898443a 596
j3 63:422be898443a 597 // send the timing byte
j3 63:422be898443a 598 sendpacket[0] = 0xC1;
IanBenzMaxim 109:5c9180b4be25 599 result = writeCom(1, sendpacket);
IanBenzMaxim 74:23be10c32fa3 600 if (result == OneWireMaster::Success)
j3 63:422be898443a 601 {
j3 63:422be898443a 602 // delay to let line settle
j3 63:422be898443a 603 wait_ms(2);
j3 63:422be898443a 604
j3 63:422be898443a 605 // set the FLEX configuration parameters
j3 63:422be898443a 606 // default PDSRC = 1.37Vus
j3 63:422be898443a 607 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SLEW | PARMSET_Slew1p37Vus;
j3 63:422be898443a 608 // default W1LT = 10us
j3 63:422be898443a 609 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_WRITE1LOW | PARMSET_Write10us;
j3 63:422be898443a 610 // default DSO/WORT = 8us
j3 63:422be898443a 611 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SAMPLEOFFSET | PARMSET_SampOff8us;
j3 63:422be898443a 612
j3 63:422be898443a 613 // construct the command to read the baud rate (to test command block)
j3 63:422be898443a 614 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 63:422be898443a 615
j3 63:422be898443a 616 // also do 1 bit operation (to test 1-Wire block)
IanBenzMaxim 109:5c9180b4be25 617 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_BIT | baud | BITPOL_ONE;
IanBenzMaxim 74:23be10c32fa3 618
IanBenzMaxim 109:5c9180b4be25 619 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 620 flushCom();
j3 63:422be898443a 621
j3 63:422be898443a 622 // send the packet
IanBenzMaxim 109:5c9180b4be25 623 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 624 if (result == OneWireMaster::Success)
j3 63:422be898443a 625 {
j3 63:422be898443a 626 // read back the response
IanBenzMaxim 109:5c9180b4be25 627 result = readCom(5, readbuffer);
IanBenzMaxim 74:23be10c32fa3 628 if (result == OneWireMaster::Success)
j3 63:422be898443a 629 {
j3 63:422be898443a 630 // look at the baud rate and bit operation
j3 63:422be898443a 631 // to see if the response makes sense
IanBenzMaxim 109:5c9180b4be25 632 if (((readbuffer[3] & 0xF1) == 0x00) && ((readbuffer[3] & 0x0E) == baud) && ((readbuffer[4] & 0xF0) == 0x90) && ((readbuffer[4] & 0x0C) == baud))
j3 63:422be898443a 633 {
j3 63:422be898443a 634 result = OneWireMaster::Success;
j3 63:422be898443a 635 }
j3 63:422be898443a 636 else
j3 63:422be898443a 637 {
j3 63:422be898443a 638 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 639 }
j3 63:422be898443a 640 }
j3 63:422be898443a 641 }
j3 63:422be898443a 642 }
IanBenzMaxim 74:23be10c32fa3 643
j3 63:422be898443a 644 return result;
j3 63:422be898443a 645 }
j3 63:422be898443a 646
IanBenzMaxim 109:5c9180b4be25 647 OneWireMaster::CmdResult DS2480B::changeBaud(BaudRate newBaud)
j3 63:422be898443a 648 {
j3 65:a28ac52ca127 649 OneWireMaster::CmdResult result = OneWireMaster::Success;
j3 65:a28ac52ca127 650
IanBenzMaxim 74:23be10c32fa3 651 uint8_t readbuffer[5], sendpacket[5], sendpacket2[5];
IanBenzMaxim 74:23be10c32fa3 652 uint8_t sendlen = 0, sendlen2 = 0;
j3 65:a28ac52ca127 653
j3 65:a28ac52ca127 654 //see if diffenent then current baud rate
IanBenzMaxim 109:5c9180b4be25 655 if (baud != newBaud)
j3 65:a28ac52ca127 656 {
j3 65:a28ac52ca127 657 // build the command packet
j3 65:a28ac52ca127 658 // check for correct mode
IanBenzMaxim 109:5c9180b4be25 659 if (mode != MODSEL_COMMAND)
j3 65:a28ac52ca127 660 {
IanBenzMaxim 109:5c9180b4be25 661 mode = MODSEL_COMMAND;
j3 65:a28ac52ca127 662 sendpacket[sendlen++] = MODE_COMMAND;
j3 65:a28ac52ca127 663 }
j3 65:a28ac52ca127 664 // build the command
IanBenzMaxim 75:8b627804927c 665 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_BAUDRATE | newBaud;
j3 63:422be898443a 666
j3 65:a28ac52ca127 667 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 668 flushCom();
j3 65:a28ac52ca127 669
j3 65:a28ac52ca127 670 // send the packet
IanBenzMaxim 109:5c9180b4be25 671 result = writeCom(sendlen, sendpacket);
IanBenzMaxim 74:23be10c32fa3 672 if (result == OneWireMaster::Success)
j3 65:a28ac52ca127 673 {
j3 65:a28ac52ca127 674 // make sure buffer is flushed
j3 65:a28ac52ca127 675 wait_ms(5);
j3 63:422be898443a 676
j3 65:a28ac52ca127 677 // change our baud rate
IanBenzMaxim 109:5c9180b4be25 678 setComBaud(newBaud);
IanBenzMaxim 109:5c9180b4be25 679 baud = newBaud;
j3 65:a28ac52ca127 680
j3 65:a28ac52ca127 681 // wait for things to settle
j3 65:a28ac52ca127 682 wait_ms(5);
j3 65:a28ac52ca127 683
j3 65:a28ac52ca127 684 // build a command packet to read back baud rate
j3 65:a28ac52ca127 685 sendpacket2[sendlen2++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 65:a28ac52ca127 686
j3 65:a28ac52ca127 687 // flush the buffers
IanBenzMaxim 109:5c9180b4be25 688 flushCom();
j3 63:422be898443a 689
j3 65:a28ac52ca127 690 // send the packet
IanBenzMaxim 109:5c9180b4be25 691 result = writeCom(sendlen2, sendpacket2);
IanBenzMaxim 74:23be10c32fa3 692 if (result == OneWireMaster::Success)
j3 63:422be898443a 693 {
j3 65:a28ac52ca127 694 // read back the 1 byte response
IanBenzMaxim 109:5c9180b4be25 695 result = readCom(1, readbuffer);
IanBenzMaxim 74:23be10c32fa3 696 if (result == OneWireMaster::Success)
j3 65:a28ac52ca127 697 {
j3 65:a28ac52ca127 698 // verify correct baud
IanBenzMaxim 74:23be10c32fa3 699 if ((readbuffer[0] & 0x0E) == (sendpacket[sendlen - 1] & 0x0E))
j3 65:a28ac52ca127 700 {
j3 65:a28ac52ca127 701 result = OneWireMaster::Success;
j3 65:a28ac52ca127 702 }
j3 65:a28ac52ca127 703 else
j3 65:a28ac52ca127 704 {
IanBenzMaxim 74:23be10c32fa3 705 result = OneWireMaster::OperationFailure;
j3 65:a28ac52ca127 706 }
j3 65:a28ac52ca127 707 }
j3 65:a28ac52ca127 708 else
j3 65:a28ac52ca127 709 {
j3 65:a28ac52ca127 710 result = OneWireMaster::CommunicationReadError;
j3 65:a28ac52ca127 711 }
j3 63:422be898443a 712 }
j3 65:a28ac52ca127 713 else
j3 65:a28ac52ca127 714 {
j3 65:a28ac52ca127 715 result = OneWireMaster::CommunicationWriteError;
j3 65:a28ac52ca127 716 }
j3 65:a28ac52ca127 717 }
j3 65:a28ac52ca127 718 else
j3 65:a28ac52ca127 719 {
j3 65:a28ac52ca127 720 result = OneWireMaster::CommunicationWriteError;
j3 65:a28ac52ca127 721 }
j3 65:a28ac52ca127 722 }
IanBenzMaxim 74:23be10c32fa3 723
IanBenzMaxim 109:5c9180b4be25 724 return result;
IanBenzMaxim 109:5c9180b4be25 725 }
IanBenzMaxim 109:5c9180b4be25 726
IanBenzMaxim 109:5c9180b4be25 727 OneWireMaster::CmdResult DS2480B::writeCom(size_t outlen, uint8_t *outbuf)
IanBenzMaxim 109:5c9180b4be25 728 {
IanBenzMaxim 109:5c9180b4be25 729 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
IanBenzMaxim 109:5c9180b4be25 730
IanBenzMaxim 109:5c9180b4be25 731 mbed::Timer timer;
IanBenzMaxim 109:5c9180b4be25 732 uint32_t timeout = calculateBitTimeout(baud) * outlen;
IanBenzMaxim 109:5c9180b4be25 733 uint8_t idx = 0;
IanBenzMaxim 109:5c9180b4be25 734
IanBenzMaxim 109:5c9180b4be25 735 timer.start();
IanBenzMaxim 109:5c9180b4be25 736 do
j3 65:a28ac52ca127 737 {
IanBenzMaxim 109:5c9180b4be25 738 while ((idx < outlen) && serial.writeable())
IanBenzMaxim 109:5c9180b4be25 739 {
IanBenzMaxim 109:5c9180b4be25 740 serial.putc(outbuf[idx++]);
IanBenzMaxim 109:5c9180b4be25 741 }
IanBenzMaxim 109:5c9180b4be25 742
IanBenzMaxim 120:200109b73e3c 743 } while ((idx < outlen) && (static_cast<unsigned int>(timer.read_us()) < timeout));
IanBenzMaxim 109:5c9180b4be25 744
IanBenzMaxim 109:5c9180b4be25 745 if (idx == outlen)
IanBenzMaxim 109:5c9180b4be25 746 {
IanBenzMaxim 109:5c9180b4be25 747 result = OneWireMaster::Success;
IanBenzMaxim 109:5c9180b4be25 748 }
IanBenzMaxim 109:5c9180b4be25 749 else
IanBenzMaxim 109:5c9180b4be25 750 {
IanBenzMaxim 109:5c9180b4be25 751 result = OneWireMaster::TimeoutError;
j3 65:a28ac52ca127 752 }
IanBenzMaxim 74:23be10c32fa3 753
j3 65:a28ac52ca127 754 return result;
j3 63:422be898443a 755 }
j3 63:422be898443a 756
IanBenzMaxim 109:5c9180b4be25 757 OneWireMaster::CmdResult DS2480B::readCom(size_t inlen, uint8_t *inbuf)
j3 63:422be898443a 758 {
IanBenzMaxim 109:5c9180b4be25 759 OneWireMaster::CmdResult result;
IanBenzMaxim 109:5c9180b4be25 760 mbed::Timer timer;
IanBenzMaxim 109:5c9180b4be25 761 uint32_t num_bytes_read = 0;
j3 112:82eb520a644b 762 uint32_t timeout = (calculateBitTimeout(baud) * inlen);
IanBenzMaxim 74:23be10c32fa3 763
IanBenzMaxim 109:5c9180b4be25 764 timer.start();
j3 63:422be898443a 765 do
j3 63:422be898443a 766 {
IanBenzMaxim 109:5c9180b4be25 767 while ((num_bytes_read < inlen) && serial.readable())
j3 63:422be898443a 768 {
IanBenzMaxim 109:5c9180b4be25 769 inbuf[num_bytes_read++] = serial.getc();
j3 63:422be898443a 770 }
IanBenzMaxim 120:200109b73e3c 771 } while ((num_bytes_read < inlen) && (static_cast<unsigned int>(timer.read_us()) < timeout));
IanBenzMaxim 109:5c9180b4be25 772 timer.stop();
IanBenzMaxim 74:23be10c32fa3 773
IanBenzMaxim 109:5c9180b4be25 774 if (num_bytes_read == inlen)
j3 63:422be898443a 775 {
IanBenzMaxim 109:5c9180b4be25 776 result = OneWireMaster::Success;
j3 63:422be898443a 777 }
j3 63:422be898443a 778 else
j3 63:422be898443a 779 {
IanBenzMaxim 109:5c9180b4be25 780 result = OneWireMaster::TimeoutError;
j3 63:422be898443a 781 }
IanBenzMaxim 74:23be10c32fa3 782
j3 63:422be898443a 783 return result;
j3 63:422be898443a 784 }
j3 63:422be898443a 785
IanBenzMaxim 109:5c9180b4be25 786 void DS2480B::breakCom()
j3 63:422be898443a 787 {
IanBenzMaxim 109:5c9180b4be25 788 // Switch to lower baud rate to ensure break is longer than 2 ms.
IanBenzMaxim 109:5c9180b4be25 789 serial.baud(4800);
IanBenzMaxim 109:5c9180b4be25 790 serial.send_break();
IanBenzMaxim 109:5c9180b4be25 791 setComBaud(baud);
j3 63:422be898443a 792 }
j3 63:422be898443a 793
IanBenzMaxim 109:5c9180b4be25 794 void DS2480B::flushCom()
j3 63:422be898443a 795 {
IanBenzMaxim 109:5c9180b4be25 796 // Clear receive buffer.
IanBenzMaxim 109:5c9180b4be25 797 while (serial.readable())
j3 63:422be898443a 798 {
IanBenzMaxim 109:5c9180b4be25 799 serial.getc();
j3 63:422be898443a 800 }
IanBenzMaxim 74:23be10c32fa3 801
IanBenzMaxim 109:5c9180b4be25 802 /* No apparent way to clear transmit buffer.
IanBenzMaxim 109:5c9180b4be25 803 * From the example in AN192 (http://pdfserv.maximintegrated.com/en/an/AN192.pdf),
IanBenzMaxim 109:5c9180b4be25 804 * the data shouldn't be sent, just aborted and the buffer cleaned out.
IanBenzMaxim 109:5c9180b4be25 805 * Below is what was used in AN192 example code using windows drivers:
IanBenzMaxim 109:5c9180b4be25 806 * PurgeComm(ComID, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR );
IanBenzMaxim 109:5c9180b4be25 807 */
j3 63:422be898443a 808 }
j3 63:422be898443a 809
IanBenzMaxim 109:5c9180b4be25 810 void DS2480B::setComBaud(BaudRate new_baud)
j3 63:422be898443a 811 {
IanBenzMaxim 74:23be10c32fa3 812 switch (new_baud)
j3 63:422be898443a 813 {
IanBenzMaxim 109:5c9180b4be25 814 case Baud115200bps:
IanBenzMaxim 109:5c9180b4be25 815 serial.baud(115200);
IanBenzMaxim 74:23be10c32fa3 816 break;
IanBenzMaxim 74:23be10c32fa3 817
IanBenzMaxim 109:5c9180b4be25 818 case Baud57600bps:
IanBenzMaxim 109:5c9180b4be25 819 serial.baud(57600);
IanBenzMaxim 74:23be10c32fa3 820 break;
IanBenzMaxim 74:23be10c32fa3 821
IanBenzMaxim 109:5c9180b4be25 822 case Baud19200bps:
IanBenzMaxim 109:5c9180b4be25 823 serial.baud(19200);
IanBenzMaxim 74:23be10c32fa3 824 break;
IanBenzMaxim 74:23be10c32fa3 825
IanBenzMaxim 109:5c9180b4be25 826 case Baud9600bps:
IanBenzMaxim 74:23be10c32fa3 827 default:
IanBenzMaxim 109:5c9180b4be25 828 serial.baud(9600);
IanBenzMaxim 74:23be10c32fa3 829 break;
j3 63:422be898443a 830 }
j3 63:422be898443a 831 }