Mike Fruge / OneWire

Implementation of 1-Wire with added Alarm Search Functionality

Dependents:   Max32630_One_Wire_Interface

OneWire_Masters/DS2480B/ds2480b.cpp@63:422be898443a, 2016-04-19 (annotated)

Committer:
j3
Date:
Tue Apr 19 21:52:49 2016 +0000
Revision:
63:422be898443a
Parent:
32:bce180b544ed
Child:
65:a28ac52ca127
DS2480B development, working but needs work

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 3:644fc630f958 33
j3 3:644fc630f958 34 #include "ds2480b.h"
j3 63:422be898443a 35
j3 63:422be898443a 36 #define WRITE_FUNCTION 0
j3 63:422be898443a 37 #define READ_FUNCTION 1
j3 63:422be898443a 38
j3 63:422be898443a 39 // Mode Commands
j3 63:422be898443a 40 #define MODE_DATA 0xE1
j3 63:422be898443a 41 #define MODE_COMMAND 0xE3
j3 63:422be898443a 42 #define MODE_STOP_PULSE 0xF1
j3 63:422be898443a 43
j3 63:422be898443a 44 // Return byte value
j3 63:422be898443a 45 #define RB_CHIPID_MASK 0x1C
j3 63:422be898443a 46 #define RB_RESET_MASK 0x03
j3 63:422be898443a 47 #define RB_1WIRESHORT 0x00
j3 63:422be898443a 48 #define RB_PRESENCE 0x01
j3 63:422be898443a 49 #define RB_ALARMPRESENCE 0x02
j3 63:422be898443a 50 #define RB_NOPRESENCE 0x03
j3 63:422be898443a 51
j3 63:422be898443a 52 #define RB_BIT_MASK 0x03
j3 63:422be898443a 53 #define RB_BIT_ONE 0x03
j3 63:422be898443a 54 #define RB_BIT_ZERO 0x00
j3 63:422be898443a 55
j3 63:422be898443a 56 // Masks for all bit ranges
j3 63:422be898443a 57 #define CMD_MASK 0x80
j3 63:422be898443a 58 #define FUNCTSEL_MASK 0x60
j3 63:422be898443a 59 #define BITPOL_MASK 0x10
j3 63:422be898443a 60 #define SPEEDSEL_MASK 0x0C
j3 63:422be898443a 61 #define MODSEL_MASK 0x02
j3 63:422be898443a 62 #define PARMSEL_MASK 0x70
j3 63:422be898443a 63 #define PARMSET_MASK 0x0E
j3 63:422be898443a 64
j3 63:422be898443a 65 // Command or config bit
j3 63:422be898443a 66 #define CMD_COMM 0x81
j3 63:422be898443a 67 #define CMD_CONFIG 0x01
j3 63:422be898443a 68
j3 63:422be898443a 69 // Function select bits
j3 63:422be898443a 70 #define FUNCTSEL_BIT 0x00
j3 63:422be898443a 71 #define FUNCTSEL_SEARCHON 0x30
j3 63:422be898443a 72 #define FUNCTSEL_SEARCHOFF 0x20
j3 63:422be898443a 73 #define FUNCTSEL_RESET 0x40
j3 63:422be898443a 74 #define FUNCTSEL_CHMOD 0x60
j3 63:422be898443a 75
j3 63:422be898443a 76 // Bit polarity/Pulse voltage bits
j3 63:422be898443a 77 #define BITPOL_ONE 0x10
j3 63:422be898443a 78 #define BITPOL_ZERO 0x00
j3 63:422be898443a 79 #define BITPOL_5V 0x00
j3 63:422be898443a 80 #define BITPOL_12V 0x10
j3 63:422be898443a 81
j3 63:422be898443a 82 // One Wire speed bits
j3 63:422be898443a 83 #define SPEEDSEL_STD 0x00
j3 63:422be898443a 84 #define SPEEDSEL_FLEX 0x04
j3 63:422be898443a 85 #define SPEEDSEL_OD 0x08
j3 63:422be898443a 86 #define SPEEDSEL_PULSE 0x0C
j3 63:422be898443a 87
j3 63:422be898443a 88 // Data/Command mode select bits
j3 63:422be898443a 89 #define MODSEL_DATA 0x00
j3 63:422be898443a 90 #define MODSEL_COMMAND 0x02
j3 63:422be898443a 91
j3 63:422be898443a 92 // 5V Follow Pulse select bits
j3 63:422be898443a 93 #define PRIME5V_TRUE 0x02
j3 63:422be898443a 94 #define PRIME5V_FALSE 0x00
j3 63:422be898443a 95
j3 63:422be898443a 96 // Parameter select bits
j3 63:422be898443a 97 #define PARMSEL_PARMREAD 0x00
j3 63:422be898443a 98 #define PARMSEL_SLEW 0x10
j3 63:422be898443a 99 #define PARMSEL_12VPULSE 0x20
j3 63:422be898443a 100 #define PARMSEL_5VPULSE 0x30
j3 63:422be898443a 101 #define PARMSEL_WRITE1LOW 0x40
j3 63:422be898443a 102 #define PARMSEL_SAMPLEOFFSET 0x50
j3 63:422be898443a 103 #define PARMSEL_ACTIVEPULLUPTIME 0x60
j3 63:422be898443a 104 #define PARMSEL_BAUDRATE 0x70
j3 63:422be898443a 105
j3 63:422be898443a 106 // Pull down slew rate.
j3 63:422be898443a 107 #define PARMSET_Slew15Vus 0x00
j3 63:422be898443a 108 #define PARMSET_Slew2p2Vus 0x02
j3 63:422be898443a 109 #define PARMSET_Slew1p65Vus 0x04
j3 63:422be898443a 110 #define PARMSET_Slew1p37Vus 0x06
j3 63:422be898443a 111 #define PARMSET_Slew1p1Vus 0x08
j3 63:422be898443a 112 #define PARMSET_Slew0p83Vus 0x0A
j3 63:422be898443a 113 #define PARMSET_Slew0p7Vus 0x0C
j3 63:422be898443a 114 #define PARMSET_Slew0p55Vus 0x0E
j3 63:422be898443a 115
j3 63:422be898443a 116 // 12V programming pulse time table
j3 63:422be898443a 117 #define PARMSET_32us 0x00
j3 63:422be898443a 118 #define PARMSET_64us 0x02
j3 63:422be898443a 119 #define PARMSET_128us 0x04
j3 63:422be898443a 120 #define PARMSET_256us 0x06
j3 63:422be898443a 121 #define PARMSET_512us 0x08
j3 63:422be898443a 122 #define PARMSET_1024us 0x0A
j3 63:422be898443a 123 #define PARMSET_2048us 0x0C
j3 63:422be898443a 124 #define PARMSET_infinite 0x0E
j3 63:422be898443a 125
j3 63:422be898443a 126 // 5V strong pull up pulse time table
j3 63:422be898443a 127 #define PARMSET_16p4ms 0x00
j3 63:422be898443a 128 #define PARMSET_65p5ms 0x02
j3 63:422be898443a 129 #define PARMSET_131ms 0x04
j3 63:422be898443a 130 #define PARMSET_262ms 0x06
j3 63:422be898443a 131 #define PARMSET_524ms 0x08
j3 63:422be898443a 132 #define PARMSET_1p05s 0x0A
j3 63:422be898443a 133 #define PARMSET_dynamic 0x0C
j3 63:422be898443a 134 #define PARMSET_infinite 0x0E
j3 63:422be898443a 135
j3 63:422be898443a 136 // Write 1 low time
j3 63:422be898443a 137 #define PARMSET_Write8us 0x00
j3 63:422be898443a 138 #define PARMSET_Write9us 0x02
j3 63:422be898443a 139 #define PARMSET_Write10us 0x04
j3 63:422be898443a 140 #define PARMSET_Write11us 0x06
j3 63:422be898443a 141 #define PARMSET_Write12us 0x08
j3 63:422be898443a 142 #define PARMSET_Write13us 0x0A
j3 63:422be898443a 143 #define PARMSET_Write14us 0x0C
j3 63:422be898443a 144 #define PARMSET_Write15us 0x0E
j3 63:422be898443a 145
j3 63:422be898443a 146 // Data sample offset and Write 0 recovery time
j3 63:422be898443a 147 #define PARMSET_SampOff3us 0x00
j3 63:422be898443a 148 #define PARMSET_SampOff4us 0x02
j3 63:422be898443a 149 #define PARMSET_SampOff5us 0x04
j3 63:422be898443a 150 #define PARMSET_SampOff6us 0x06
j3 63:422be898443a 151 #define PARMSET_SampOff7us 0x08
j3 63:422be898443a 152 #define PARMSET_SampOff8us 0x0A
j3 63:422be898443a 153 #define PARMSET_SampOff9us 0x0C
j3 63:422be898443a 154 #define PARMSET_SampOff10us 0x0E
j3 63:422be898443a 155
j3 63:422be898443a 156 // Active pull up on time
j3 63:422be898443a 157 #define PARMSET_PullUp0p0us 0x00
j3 63:422be898443a 158 #define PARMSET_PullUp0p5us 0x02
j3 63:422be898443a 159 #define PARMSET_PullUp1p0us 0x04
j3 63:422be898443a 160 #define PARMSET_PullUp1p5us 0x06
j3 63:422be898443a 161 #define PARMSET_PullUp2p0us 0x08
j3 63:422be898443a 162 #define PARMSET_PullUp2p5us 0x0A
j3 63:422be898443a 163 #define PARMSET_PullUp3p0us 0x0C
j3 63:422be898443a 164 #define PARMSET_PullUp3p5us 0x0E
j3 63:422be898443a 165
j3 63:422be898443a 166 // Baud rate bits
j3 63:422be898443a 167 #define PARMSET_9600 0x00
j3 63:422be898443a 168 #define PARMSET_19200 0x02
j3 63:422be898443a 169 #define PARMSET_57600 0x04
j3 63:422be898443a 170 #define PARMSET_115200 0x06
j3 63:422be898443a 171
j3 63:422be898443a 172 // DS2480B program voltage available
j3 63:422be898443a 173 #define DS2480BPROG_MASK 0x20
j3 63:422be898443a 174
j3 63:422be898443a 175 // mode bit flags
j3 63:422be898443a 176 #define MODE_NORMAL 0x00
j3 63:422be898443a 177 #define MODE_OVERDRIVE 0x01
j3 63:422be898443a 178 #define MODE_STRONG5 0x02
j3 63:422be898443a 179 #define MODE_PROGRAM 0x04
j3 63:422be898443a 180 #define MODE_BREAK 0x08
j3 63:422be898443a 181
j3 63:422be898443a 182 #define MAX_BAUD PARMSET_115200
j3 63:422be898443a 183
j3 3:644fc630f958 184
j3 3:644fc630f958 185
j3 3:644fc630f958 186 //*********************************************************************
j3 16:883becbd85f8 187 Ds2480b::Ds2480b(Serial &p_serial)
j3 16:883becbd85f8 188 :_p_serial(&p_serial), _serial_owner(false)
j3 3:644fc630f958 189 {
j3 3:644fc630f958 190 }
j3 3:644fc630f958 191
j3 3:644fc630f958 192
j3 3:644fc630f958 193 //*********************************************************************
j3 63:422be898443a 194 Ds2480b::Ds2480b(PinName tx, PinName rx)
j3 16:883becbd85f8 195 :_p_serial(new Serial(tx, rx)), _serial_owner(true)
j3 3:644fc630f958 196 {
j3 3:644fc630f958 197 }
j3 3:644fc630f958 198
j3 3:644fc630f958 199
j3 3:644fc630f958 200 //*********************************************************************
j3 3:644fc630f958 201 Ds2480b::~Ds2480b()
j3 3:644fc630f958 202 {
j3 3:644fc630f958 203 if(_serial_owner)
j3 3:644fc630f958 204 {
j3 3:644fc630f958 205 delete _p_serial;
j3 3:644fc630f958 206 }
j3 3:644fc630f958 207 }
j3 3:644fc630f958 208
j3 3:644fc630f958 209
j3 3:644fc630f958 210 //*********************************************************************
j3 63:422be898443a 211 void Ds2480b::rx_callback(void)
j3 63:422be898443a 212 {
j3 63:422be898443a 213 rx_buffer.buff[rx_buffer.w_idx++] = _p_serial->getc();
j3 63:422be898443a 214
j3 63:422be898443a 215 if(rx_buffer.w_idx == rx_buffer.r_idx)
j3 63:422be898443a 216 {
j3 63:422be898443a 217 rx_buffer.wrap_error = true;
j3 63:422be898443a 218 }
j3 63:422be898443a 219 }
j3 63:422be898443a 220
j3 63:422be898443a 221
j3 63:422be898443a 222 //*********************************************************************
j3 63:422be898443a 223 void Ds2480b::tx_callback(void)
j3 63:422be898443a 224 {
j3 63:422be898443a 225 }
j3 63:422be898443a 226
j3 63:422be898443a 227
j3 63:422be898443a 228 //*********************************************************************
j3 23:e8e403d61359 229 OneWireMaster::CmdResult Ds2480b::OWInitMaster(void)
j3 14:7b2886a50321 230 {
j3 63:422be898443a 231 _p_serial->attach(this, &Ds2480b::rx_callback, Serial::RxIrq);
j3 63:422be898443a 232 _p_serial->attach(this, &Ds2480b::tx_callback, Serial::TxIrq);
j3 63:422be898443a 233
j3 63:422be898443a 234 rx_buffer.w_idx = 0;
j3 63:422be898443a 235 rx_buffer.r_idx = 0;
j3 63:422be898443a 236 rx_buffer.wrap_error = false;
j3 14:7b2886a50321 237
j3 63:422be898443a 238 _ULevel = OneWireMaster::LEVEL_NORMAL;
j3 63:422be898443a 239 _UBaud = BPS_9600;
j3 63:422be898443a 240 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 241 _USpeed = OneWireMaster::SPEED_STANDARD;
j3 17:b646b1e3970b 242
j3 63:422be898443a 243 return DS2480B_Detect();
j3 14:7b2886a50321 244 }
j3 14:7b2886a50321 245
j3 14:7b2886a50321 246
j3 14:7b2886a50321 247 //*********************************************************************
j3 23:e8e403d61359 248 OneWireMaster::CmdResult Ds2480b::OWReset(void)
j3 3:644fc630f958 249 {
j3 63:422be898443a 250 OneWireMaster::CmdResult result;
j3 63:422be898443a 251
j3 63:422be898443a 252 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 253 uint8_t sendlen=0;
j3 63:422be898443a 254
j3 63:422be898443a 255 // make sure normal level
j3 63:422be898443a 256 result = OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 257 if(result == OneWireMaster::Success)
j3 63:422be898443a 258 {
j3 63:422be898443a 259 // check for correct mode
j3 63:422be898443a 260 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 261 {
j3 63:422be898443a 262 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 263 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 264 }
j3 63:422be898443a 265
j3 63:422be898443a 266 // construct the command
j3 63:422be898443a 267 sendpacket[sendlen++] = (uint8_t)(CMD_COMM | FUNCTSEL_RESET | _USpeed);
j3 63:422be898443a 268
j3 63:422be898443a 269 FlushCOM();
j3 63:422be898443a 270
j3 63:422be898443a 271 // send the packet
j3 63:422be898443a 272 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 273 if(result == OneWireMaster::Success)
j3 63:422be898443a 274 {
j3 63:422be898443a 275 // read back the 1 byte response
j3 63:422be898443a 276 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 277 if(result == OneWireMaster::Success)
j3 63:422be898443a 278 {
j3 63:422be898443a 279 // make sure this byte looks like a reset byte
j3 63:422be898443a 280 if(((readbuffer[0] & RB_RESET_MASK) == RB_PRESENCE) || ((readbuffer[0] & RB_RESET_MASK) == RB_ALARMPRESENCE))
j3 63:422be898443a 281 {
j3 63:422be898443a 282 result = OneWireMaster::Success;
j3 63:422be898443a 283 }
j3 63:422be898443a 284 else
j3 63:422be898443a 285 {
j3 63:422be898443a 286 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 287 }
j3 63:422be898443a 288 }
j3 63:422be898443a 289 }
j3 63:422be898443a 290
j3 63:422be898443a 291 if(result != OneWireMaster::Success)
j3 63:422be898443a 292 {
j3 63:422be898443a 293 // an error occured so re-sync with DS2480B
j3 63:422be898443a 294 DS2480B_Detect();
j3 63:422be898443a 295 }
j3 63:422be898443a 296 }
j3 63:422be898443a 297
j3 17:b646b1e3970b 298 return result;
j3 3:644fc630f958 299 }
j3 3:644fc630f958 300
j3 3:644fc630f958 301
j3 63:422be898443a 302 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 303 OneWireMaster::CmdResult Ds2480b::OWTouchBit(uint8_t & sendrecvbit, OWLevel after_level)
j3 3:644fc630f958 304 {
j3 23:e8e403d61359 305 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 306
j3 63:422be898443a 307 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 308 uint8_t sendlen=0;
j3 63:422be898443a 309
j3 63:422be898443a 310 // make sure normal level
j3 63:422be898443a 311 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 312
j3 63:422be898443a 313 // check for correct mode
j3 63:422be898443a 314 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 315 {
j3 63:422be898443a 316 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 317 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 318 }
j3 63:422be898443a 319
j3 63:422be898443a 320 // construct the command
j3 63:422be898443a 321 sendpacket[sendlen] = (sendrecvbit != 0) ? BITPOL_ONE : BITPOL_ZERO;
j3 63:422be898443a 322 sendpacket[sendlen++] |= CMD_COMM | FUNCTSEL_BIT | _USpeed;
j3 63:422be898443a 323
j3 63:422be898443a 324 // flush the buffers
j3 63:422be898443a 325 FlushCOM();
j3 63:422be898443a 326
j3 63:422be898443a 327 // send the packet
j3 63:422be898443a 328 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 329 if(result == OneWireMaster::Success)
j3 63:422be898443a 330 {
j3 63:422be898443a 331 // read back the response
j3 63:422be898443a 332 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 333 if(result == OneWireMaster::Success)
j3 63:422be898443a 334 {
j3 63:422be898443a 335 // interpret the response
j3 63:422be898443a 336 if (((readbuffer[0] & 0xE0) == 0x80) && ((readbuffer[0] & RB_BIT_MASK) == RB_BIT_ONE))
j3 63:422be898443a 337 {
j3 63:422be898443a 338 sendrecvbit = 1;
j3 63:422be898443a 339 result = OneWireMaster::Success;
j3 63:422be898443a 340 }
j3 63:422be898443a 341 else
j3 63:422be898443a 342 {
j3 63:422be898443a 343 sendrecvbit = 0;
j3 63:422be898443a 344 result = OneWireMaster::Success;
j3 63:422be898443a 345 }
j3 63:422be898443a 346 }
j3 63:422be898443a 347 else
j3 63:422be898443a 348 {
j3 63:422be898443a 349 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 350 }
j3 63:422be898443a 351 }
j3 63:422be898443a 352 else
j3 63:422be898443a 353 {
j3 63:422be898443a 354 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 355 }
j3 63:422be898443a 356
j3 63:422be898443a 357 // an error occured so re-sync with DS2480B
j3 63:422be898443a 358 if(result != OneWireMaster::Success)
j3 63:422be898443a 359 {
j3 63:422be898443a 360 DS2480B_Detect();
j3 63:422be898443a 361 }
j3 63:422be898443a 362 else
j3 63:422be898443a 363 {
j3 63:422be898443a 364 result = OWSetLevel(after_level);
j3 63:422be898443a 365 }
j3 63:422be898443a 366
j3 17:b646b1e3970b 367 return result;
j3 3:644fc630f958 368 }
j3 3:644fc630f958 369
j3 3:644fc630f958 370
j3 3:644fc630f958 371 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 372 OneWireMaster::CmdResult Ds2480b::OWWriteByte(uint8_t sendbyte, OWLevel after_level)
IanBenzMaxim 26:a361e3f42ba5 373 {
IanBenzMaxim 26:a361e3f42ba5 374 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 375
j3 63:422be898443a 376 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 377 uint8_t sendlen=0;
j3 63:422be898443a 378
j3 63:422be898443a 379 // make sure normal level
j3 63:422be898443a 380 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 381
j3 63:422be898443a 382 // check for correct mode
j3 63:422be898443a 383 if (_UMode != MODSEL_DATA)
j3 63:422be898443a 384 {
j3 63:422be898443a 385 _UMode = MODSEL_DATA;
j3 63:422be898443a 386 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 387 }
j3 63:422be898443a 388
j3 63:422be898443a 389 // add the byte to send
j3 63:422be898443a 390 sendpacket[sendlen++] = sendbyte;
j3 63:422be898443a 391
j3 63:422be898443a 392 // check for duplication of data that looks like COMMAND mode
j3 63:422be898443a 393 if(sendbyte == MODE_COMMAND)
j3 63:422be898443a 394 {
j3 63:422be898443a 395 sendpacket[sendlen++] = sendbyte;
j3 63:422be898443a 396 }
j3 63:422be898443a 397
j3 63:422be898443a 398 // flush the buffers
j3 63:422be898443a 399 FlushCOM();
j3 63:422be898443a 400
j3 63:422be898443a 401 // send the packet
j3 63:422be898443a 402 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 403 if(result == OneWireMaster::Success)
j3 63:422be898443a 404 {
j3 63:422be898443a 405 // read back the 1 byte response
j3 63:422be898443a 406 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 407 if((result == OneWireMaster::Success) && (readbuffer[0] == sendbyte))
j3 63:422be898443a 408 {
j3 63:422be898443a 409 result = OneWireMaster::Success;
j3 63:422be898443a 410 }
j3 63:422be898443a 411 else
j3 63:422be898443a 412 {
j3 63:422be898443a 413 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 414 }
j3 63:422be898443a 415 }
j3 63:422be898443a 416 else
j3 63:422be898443a 417 {
j3 63:422be898443a 418 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 419 }
j3 63:422be898443a 420
j3 63:422be898443a 421 // an error occured so re-sync with DS2480B
j3 63:422be898443a 422 if(result != OneWireMaster::Success)
j3 63:422be898443a 423 {
j3 63:422be898443a 424 DS2480B_Detect();
j3 63:422be898443a 425 }
j3 63:422be898443a 426 else
j3 63:422be898443a 427 {
j3 63:422be898443a 428 result = OWSetLevel(after_level);
j3 63:422be898443a 429 }
j3 63:422be898443a 430
IanBenzMaxim 26:a361e3f42ba5 431 return result;
IanBenzMaxim 26:a361e3f42ba5 432 }
IanBenzMaxim 26:a361e3f42ba5 433
IanBenzMaxim 26:a361e3f42ba5 434
IanBenzMaxim 26:a361e3f42ba5 435 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 436 OneWireMaster::CmdResult Ds2480b::OWReadByte(uint8_t & recvbyte, OWLevel after_level)
j3 3:644fc630f958 437 {
j3 23:e8e403d61359 438 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 439
j3 63:422be898443a 440 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 441 uint8_t sendlen=0;
j3 63:422be898443a 442
j3 63:422be898443a 443 // make sure normal level
j3 63:422be898443a 444 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 445
j3 63:422be898443a 446 // check for correct mode
j3 63:422be898443a 447 if (_UMode != MODSEL_DATA)
j3 63:422be898443a 448 {
j3 63:422be898443a 449 _UMode = MODSEL_DATA;
j3 63:422be898443a 450 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 451 }
j3 63:422be898443a 452
j3 63:422be898443a 453 // add the byte to send
j3 63:422be898443a 454 sendpacket[sendlen++] = 0xFF;
j3 63:422be898443a 455
j3 63:422be898443a 456 // flush the buffers
j3 63:422be898443a 457 FlushCOM();
j3 63:422be898443a 458
j3 63:422be898443a 459 // send the packet
j3 63:422be898443a 460 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 461 if(result == OneWireMaster::Success)
j3 63:422be898443a 462 {
j3 63:422be898443a 463 // read back the 1 byte response
j3 63:422be898443a 464 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 465 if(result == OneWireMaster::Success)
j3 63:422be898443a 466 {
j3 63:422be898443a 467 recvbyte = readbuffer[0];
j3 63:422be898443a 468 result = OneWireMaster::Success;
j3 63:422be898443a 469 }
j3 63:422be898443a 470 else
j3 63:422be898443a 471 {
j3 63:422be898443a 472 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 473 }
j3 63:422be898443a 474 }
j3 63:422be898443a 475 else
j3 63:422be898443a 476 {
j3 63:422be898443a 477 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 478 }
j3 63:422be898443a 479
j3 63:422be898443a 480 // an error occured so re-sync with DS2480B
j3 63:422be898443a 481 if(result != OneWireMaster::Success)
j3 63:422be898443a 482 {
j3 63:422be898443a 483 DS2480B_Detect();
j3 63:422be898443a 484 }
j3 63:422be898443a 485 else
j3 63:422be898443a 486 {
j3 63:422be898443a 487 result = OWSetLevel(after_level);
j3 63:422be898443a 488 }
j3 63:422be898443a 489
j3 17:b646b1e3970b 490 return result;
j3 3:644fc630f958 491 }
j3 3:644fc630f958 492
j3 3:644fc630f958 493
j3 3:644fc630f958 494 //*********************************************************************
j3 23:e8e403d61359 495 OneWireMaster::CmdResult Ds2480b::OWWriteBlock(const uint8_t *tran_buf, uint8_t tran_len)
j3 3:644fc630f958 496 {
j3 63:422be898443a 497 OneWireMaster::CmdResult result;
j3 63:422be898443a 498 uint8_t idx = 0;
j3 63:422be898443a 499
j3 63:422be898443a 500 do
j3 63:422be898443a 501 {
j3 63:422be898443a 502 result = OWWriteByte(tran_buf[idx++], OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 503 }
j3 63:422be898443a 504 while((result == OneWireMaster::Success) && (idx < tran_len));
j3 63:422be898443a 505
j3 17:b646b1e3970b 506 return result;
j3 17:b646b1e3970b 507 }
j3 17:b646b1e3970b 508
j3 17:b646b1e3970b 509
j3 17:b646b1e3970b 510 //*********************************************************************
j3 23:e8e403d61359 511 OneWireMaster::CmdResult Ds2480b::OWReadBlock(uint8_t *rx_buf, uint8_t rx_len)
j3 17:b646b1e3970b 512 {
j3 63:422be898443a 513 OneWireMaster::CmdResult result;
j3 63:422be898443a 514 uint8_t idx = 0;
j3 3:644fc630f958 515
j3 63:422be898443a 516 do
j3 63:422be898443a 517 {
j3 63:422be898443a 518 result = OWReadByte(rx_buf[idx++], OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 519 }
j3 63:422be898443a 520 while((result == OneWireMaster::Success) && (idx < rx_len));
j3 63:422be898443a 521
j3 17:b646b1e3970b 522 return result;
j3 17:b646b1e3970b 523 }
j3 17:b646b1e3970b 524
j3 17:b646b1e3970b 525
j3 17:b646b1e3970b 526 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 527 OneWireMaster::CmdResult Ds2480b::OWSetSpeed(OWSpeed new_speed)
j3 17:b646b1e3970b 528 {
j3 23:e8e403d61359 529 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 17:b646b1e3970b 530
j3 17:b646b1e3970b 531 //TODO
j3 17:b646b1e3970b 532
j3 17:b646b1e3970b 533 return result;
j3 3:644fc630f958 534 }
j3 3:644fc630f958 535
j3 3:644fc630f958 536
j3 3:644fc630f958 537 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 538 OneWireMaster::CmdResult Ds2480b::OWSetLevel(OWLevel new_level)
j3 3:644fc630f958 539 {
j3 63:422be898443a 540 OneWireMaster::CmdResult result = OneWireMaster::Success;
j3 63:422be898443a 541
j3 63:422be898443a 542 uint8_t sendpacket[10],readbuffer[10];
j3 63:422be898443a 543 uint8_t sendlen=0;
j3 63:422be898443a 544
j3 63:422be898443a 545 // check if need to change level
j3 63:422be898443a 546 if(new_level != _ULevel)
j3 63:422be898443a 547 {
j3 63:422be898443a 548 // check for correct mode
j3 63:422be898443a 549 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 550 {
j3 63:422be898443a 551 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 552 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 553 }
j3 63:422be898443a 554
j3 63:422be898443a 555 // check if just putting back to normal
j3 63:422be898443a 556 if(new_level == OneWireMaster::LEVEL_NORMAL)
j3 63:422be898443a 557 {
j3 63:422be898443a 558 // stop pulse command
j3 63:422be898443a 559 sendpacket[sendlen++] = MODE_STOP_PULSE;
j3 63:422be898443a 560
j3 63:422be898443a 561 // add the command to begin the pulse WITHOUT prime
j3 63:422be898443a 562 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V | PRIME5V_FALSE;
j3 63:422be898443a 563
j3 63:422be898443a 564 // stop pulse command
j3 63:422be898443a 565 sendpacket[sendlen++] = MODE_STOP_PULSE;
j3 63:422be898443a 566
j3 63:422be898443a 567 FlushCOM();
j3 63:422be898443a 568
j3 63:422be898443a 569 // send the packet
j3 63:422be898443a 570 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 571 if(result == OneWireMaster::Success)
j3 63:422be898443a 572 {
j3 63:422be898443a 573 // read back the 1 byte response
j3 63:422be898443a 574 result = ReadCOM(2,readbuffer);
j3 63:422be898443a 575 if(result == OneWireMaster::Success)
j3 63:422be898443a 576 {
j3 63:422be898443a 577 // check response byte
j3 63:422be898443a 578 if (((readbuffer[0] & 0xE0) == 0xE0) && ((readbuffer[1] & 0xE0) == 0xE0))
j3 63:422be898443a 579 {
j3 63:422be898443a 580 _ULevel = OneWireMaster::LEVEL_NORMAL;
j3 63:422be898443a 581 }
j3 63:422be898443a 582 else
j3 63:422be898443a 583 {
j3 63:422be898443a 584 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 585 }
j3 63:422be898443a 586 }
j3 63:422be898443a 587 }
j3 63:422be898443a 588 }
j3 63:422be898443a 589 // set new level
j3 63:422be898443a 590 else
j3 63:422be898443a 591 {
j3 63:422be898443a 592 // set the SPUD time value
j3 63:422be898443a 593 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_5VPULSE | PARMSET_infinite;
j3 63:422be898443a 594 // add the command to begin the pulse
j3 63:422be898443a 595 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V;
j3 63:422be898443a 596
j3 63:422be898443a 597 FlushCOM();
j3 63:422be898443a 598
j3 63:422be898443a 599 // send the packet
j3 63:422be898443a 600 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 601 if(result == OneWireMaster::Success)
j3 63:422be898443a 602 {
j3 63:422be898443a 603 // read back the 1 byte response from setting time limit
j3 63:422be898443a 604 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 605 if(result == OneWireMaster::Success)
j3 63:422be898443a 606 {
j3 63:422be898443a 607 // check response byte
j3 63:422be898443a 608 if ((readbuffer[0] & 0x81) == 0)
j3 63:422be898443a 609 {
j3 63:422be898443a 610 _ULevel = new_level;
j3 63:422be898443a 611 }
j3 63:422be898443a 612 else
j3 63:422be898443a 613 {
j3 63:422be898443a 614 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 615 }
j3 63:422be898443a 616 }
j3 63:422be898443a 617 }
j3 63:422be898443a 618 }
j3 63:422be898443a 619
j3 63:422be898443a 620 // if lost communication with DS2480B then reset
j3 63:422be898443a 621 if(result != OneWireMaster::Success)
j3 63:422be898443a 622 {
j3 63:422be898443a 623 DS2480B_Detect();
j3 63:422be898443a 624 }
j3 63:422be898443a 625
j3 63:422be898443a 626 }
j3 63:422be898443a 627
j3 63:422be898443a 628 return result;
j3 63:422be898443a 629 }
j3 63:422be898443a 630
j3 63:422be898443a 631
j3 63:422be898443a 632 //*********************************************************************
j3 63:422be898443a 633 OneWireMaster::CmdResult Ds2480b::DS2480B_Detect(void)
j3 63:422be898443a 634 {
j3 63:422be898443a 635 OneWireMaster::CmdResult result;
j3 63:422be898443a 636
j3 63:422be898443a 637 uint8_t sendpacket[10],readbuffer[10];
j3 63:422be898443a 638 uint8_t sendlen=0;
j3 63:422be898443a 639
j3 63:422be898443a 640 // reset modes
j3 63:422be898443a 641 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 642 _UBaud = BPS_9600;
j3 63:422be898443a 643 _USpeed = SPEEDSEL_FLEX;
j3 63:422be898443a 644
j3 63:422be898443a 645 // set the baud rate to 9600
j3 63:422be898443a 646 SetBaudCOM(_UBaud);
j3 63:422be898443a 647
j3 63:422be898443a 648 // send a break to reset the DS2480B
j3 63:422be898443a 649 BreakCOM();
j3 63:422be898443a 650
j3 63:422be898443a 651 // delay to let line settle
j3 63:422be898443a 652 wait_ms(2);
j3 63:422be898443a 653
j3 63:422be898443a 654 FlushCOM();
j3 63:422be898443a 655
j3 63:422be898443a 656 // send the timing byte
j3 63:422be898443a 657 sendpacket[0] = 0xC1;
j3 63:422be898443a 658 result = WriteCOM(1,sendpacket);
j3 63:422be898443a 659 if(result == OneWireMaster::Success)
j3 63:422be898443a 660 {
j3 63:422be898443a 661 // delay to let line settle
j3 63:422be898443a 662 wait_ms(2);
j3 63:422be898443a 663
j3 63:422be898443a 664 // set the FLEX configuration parameters
j3 63:422be898443a 665 // default PDSRC = 1.37Vus
j3 63:422be898443a 666 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SLEW | PARMSET_Slew1p37Vus;
j3 63:422be898443a 667 // default W1LT = 10us
j3 63:422be898443a 668 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_WRITE1LOW | PARMSET_Write10us;
j3 63:422be898443a 669 // default DSO/WORT = 8us
j3 63:422be898443a 670 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SAMPLEOFFSET | PARMSET_SampOff8us;
j3 63:422be898443a 671
j3 63:422be898443a 672 // construct the command to read the baud rate (to test command block)
j3 63:422be898443a 673 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 63:422be898443a 674
j3 63:422be898443a 675 // also do 1 bit operation (to test 1-Wire block)
j3 63:422be898443a 676 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_BIT | _UBaud | BITPOL_ONE;
j3 63:422be898443a 677
j3 63:422be898443a 678 FlushCOM();
j3 63:422be898443a 679
j3 63:422be898443a 680 // send the packet
j3 63:422be898443a 681 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 682 if(result == OneWireMaster::Success)
j3 63:422be898443a 683 {
j3 63:422be898443a 684 // read back the response
j3 63:422be898443a 685 result = ReadCOM(5,readbuffer);
j3 63:422be898443a 686 if(result == OneWireMaster::Success)
j3 63:422be898443a 687 {
j3 63:422be898443a 688 // look at the baud rate and bit operation
j3 63:422be898443a 689 // to see if the response makes sense
j3 63:422be898443a 690 if (((readbuffer[3] & 0xF1) == 0x00) && ((readbuffer[3] & 0x0E) == _UBaud) && ((readbuffer[4] & 0xF0) == 0x90) && ((readbuffer[4] & 0x0C) == _UBaud))
j3 63:422be898443a 691 {
j3 63:422be898443a 692 result = OneWireMaster::Success;
j3 63:422be898443a 693 }
j3 63:422be898443a 694 else
j3 63:422be898443a 695 {
j3 63:422be898443a 696 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 697 }
j3 63:422be898443a 698 }
j3 63:422be898443a 699 }
j3 63:422be898443a 700 }
j3 63:422be898443a 701
j3 63:422be898443a 702 return result;
j3 63:422be898443a 703 }
j3 63:422be898443a 704
j3 63:422be898443a 705
j3 63:422be898443a 706 //*********************************************************************
j3 63:422be898443a 707 OneWireMaster::CmdResult Ds2480b::DS2480B_ChangeBaud(DS2480B_BPS newbaud)
j3 63:422be898443a 708 {
j3 63:422be898443a 709 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 710
j3 63:422be898443a 711 uint8_t rt=0;
j3 63:422be898443a 712 uint8_t readbuffer[5],sendpacket[5],sendpacket2[5];
j3 63:422be898443a 713 uint8_t sendlen=0,sendlen2=0;
j3 63:422be898443a 714
j3 63:422be898443a 715 // see if diffenent then current baud rate
j3 63:422be898443a 716 if (_UBaud == newbaud)
j3 63:422be898443a 717 {
j3 63:422be898443a 718 //return _UBaud;
j3 63:422be898443a 719 }
j3 63:422be898443a 720 else
j3 63:422be898443a 721 {
j3 63:422be898443a 722 // build the command packet
j3 63:422be898443a 723 // check for correct mode
j3 63:422be898443a 724 if (_UMode != MODSEL_COMMAND)
j3 63:422be898443a 725 {
j3 63:422be898443a 726 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 727 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 728 }
j3 63:422be898443a 729 // build the command
j3 63:422be898443a 730 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_BAUDRATE | newbaud;
j3 63:422be898443a 731
j3 63:422be898443a 732 // flush the buffers
j3 63:422be898443a 733 FlushCOM();
j3 63:422be898443a 734
j3 63:422be898443a 735 // send the packet
j3 63:422be898443a 736 if (!WriteCOM(sendlen,sendpacket))
j3 63:422be898443a 737 rt = 0;
j3 63:422be898443a 738 else
j3 63:422be898443a 739 {
j3 63:422be898443a 740 // make sure buffer is flushed
j3 63:422be898443a 741 wait_ms(5);
j3 63:422be898443a 742
j3 63:422be898443a 743 // change our baud rate
j3 63:422be898443a 744 SetBaudCOM(newbaud);
j3 63:422be898443a 745 _UBaud = newbaud;
j3 63:422be898443a 746
j3 63:422be898443a 747 // wait for things to settle
j3 63:422be898443a 748 wait_ms(5);
j3 63:422be898443a 749
j3 63:422be898443a 750 // build a command packet to read back baud rate
j3 63:422be898443a 751 sendpacket2[sendlen2++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 63:422be898443a 752
j3 63:422be898443a 753 // flush the buffers
j3 63:422be898443a 754 FlushCOM();
j3 63:422be898443a 755
j3 63:422be898443a 756 // send the packet
j3 63:422be898443a 757 if(WriteCOM(sendlen2,sendpacket2))
j3 63:422be898443a 758 {
j3 63:422be898443a 759 // read back the 1 byte response
j3 63:422be898443a 760 if (ReadCOM(1,readbuffer) == 1)
j3 63:422be898443a 761 {
j3 63:422be898443a 762 // verify correct baud
j3 63:422be898443a 763 if (((readbuffer[0] & 0x0E) == (sendpacket[sendlen-1] & 0x0E)))
j3 63:422be898443a 764 rt = 1;
j3 63:422be898443a 765 }
j3 63:422be898443a 766 }
j3 63:422be898443a 767 }
j3 63:422be898443a 768 }
j3 63:422be898443a 769
j3 63:422be898443a 770 // if lost communication with DS2480B then reset
j3 63:422be898443a 771 if (rt != 1)
j3 63:422be898443a 772 DS2480B_Detect();
j3 63:422be898443a 773
j3 63:422be898443a 774 return result;
j3 63:422be898443a 775 }
j3 63:422be898443a 776
j3 63:422be898443a 777
j3 63:422be898443a 778 //*********************************************************************
j3 63:422be898443a 779 OneWireMaster::CmdResult Ds2480b::WriteCOM(uint32_t outlen, uint8_t *outbuf)
j3 63:422be898443a 780 {
j3 23:e8e403d61359 781 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 3:644fc630f958 782
j3 63:422be898443a 783 Timer t;
j3 63:422be898443a 784 uint32_t t_val;
j3 63:422be898443a 785 uint32_t timeout;
j3 63:422be898443a 786 uint8_t idx = 0;
j3 63:422be898443a 787
j3 63:422be898443a 788 //calculate timeout, the time needed to tx 1 byte
j3 63:422be898443a 789 switch(_UBaud)
j3 63:422be898443a 790 {
j3 63:422be898443a 791 case BPS_115200:
j3 63:422be898443a 792 timeout = ((1000000/115200)*10);
j3 63:422be898443a 793 break;
j3 63:422be898443a 794
j3 63:422be898443a 795 case BPS_57600:
j3 63:422be898443a 796 timeout = ((1000000/57600)*10);
j3 63:422be898443a 797 break;
j3 63:422be898443a 798
j3 63:422be898443a 799 case BPS_19200:
j3 63:422be898443a 800 timeout = ((1000000/19200)*10);
j3 63:422be898443a 801 break;
j3 63:422be898443a 802
j3 63:422be898443a 803 case BPS_9600:
j3 63:422be898443a 804 default:
j3 63:422be898443a 805 timeout = ((1000000/9600)*10);
j3 63:422be898443a 806 break;
j3 63:422be898443a 807 }
j3 63:422be898443a 808
j3 63:422be898443a 809 t.start();
j3 63:422be898443a 810 do
j3 63:422be898443a 811 {
j3 63:422be898443a 812 t.reset();
j3 63:422be898443a 813 do
j3 63:422be898443a 814 {
j3 63:422be898443a 815 t_val = t.read_us();
j3 63:422be898443a 816 }
j3 63:422be898443a 817 while(!_p_serial->writeable() && (t_val < timeout));
j3 63:422be898443a 818
j3 63:422be898443a 819 if(t_val < timeout)
j3 63:422be898443a 820 {
j3 63:422be898443a 821 _p_serial->putc(outbuf[idx++]);
j3 63:422be898443a 822 result = OneWireMaster::Success;
j3 63:422be898443a 823 }
j3 63:422be898443a 824 else
j3 63:422be898443a 825 {
j3 63:422be898443a 826 result = OneWireMaster::TimeoutError;
j3 63:422be898443a 827 }
j3 63:422be898443a 828 }
j3 63:422be898443a 829 while((idx < outlen) && (result == OneWireMaster::Success));
j3 3:644fc630f958 830
j3 17:b646b1e3970b 831 return result;
j3 63:422be898443a 832 }
j3 63:422be898443a 833
j3 63:422be898443a 834
j3 63:422be898443a 835 //*********************************************************************
j3 63:422be898443a 836 OneWireMaster::CmdResult Ds2480b::ReadCOM(uint32_t inlen, uint8_t *inbuf)
j3 63:422be898443a 837 {
j3 63:422be898443a 838 OneWireMaster::CmdResult result;
j3 63:422be898443a 839 uint32_t num_bytes_read= 0;
j3 63:422be898443a 840 uint32_t timeout;
j3 63:422be898443a 841
j3 63:422be898443a 842 //calculate timeout, 5x the time needed to recieve inlen bytes
j3 63:422be898443a 843 switch(_UBaud)
j3 63:422be898443a 844 {
j3 63:422be898443a 845 case BPS_115200:
j3 63:422be898443a 846 timeout = ((1000000/115200)*50)*inlen;
j3 63:422be898443a 847 break;
j3 63:422be898443a 848
j3 63:422be898443a 849 case BPS_57600:
j3 63:422be898443a 850 timeout = ((1000000/57600)*50)*inlen;
j3 63:422be898443a 851 break;
j3 63:422be898443a 852
j3 63:422be898443a 853 case BPS_19200:
j3 63:422be898443a 854 timeout = ((1000000/19200)*50)*inlen;
j3 63:422be898443a 855 break;
j3 63:422be898443a 856
j3 63:422be898443a 857 case BPS_9600:
j3 63:422be898443a 858 default:
j3 63:422be898443a 859 timeout = ((1000000/9600)*50)*inlen;
j3 63:422be898443a 860 break;
j3 63:422be898443a 861 }
j3 63:422be898443a 862
j3 63:422be898443a 863 wait_us(timeout);
j3 63:422be898443a 864
j3 63:422be898443a 865 if(rx_buffer.wrap_error)
j3 63:422be898443a 866 {
j3 63:422be898443a 867 //reset rx buffer, error, and return failure
j3 63:422be898443a 868 rx_buffer.w_idx = 0;
j3 63:422be898443a 869 rx_buffer.r_idx = 0;
j3 63:422be898443a 870 rx_buffer.wrap_error = false;
j3 63:422be898443a 871
j3 63:422be898443a 872 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 873 }
j3 63:422be898443a 874 else
j3 63:422be898443a 875 {
j3 63:422be898443a 876 if(rx_buffer.w_idx != rx_buffer.r_idx)
j3 63:422be898443a 877 {
j3 63:422be898443a 878 do
j3 63:422be898443a 879 {
j3 63:422be898443a 880 inbuf[num_bytes_read++] = rx_buffer.buff[rx_buffer.r_idx++];
j3 63:422be898443a 881 }
j3 63:422be898443a 882 while((num_bytes_read < inlen) && (rx_buffer.w_idx != rx_buffer.r_idx));
j3 63:422be898443a 883
j3 63:422be898443a 884 if(num_bytes_read == inlen)
j3 63:422be898443a 885 {
j3 63:422be898443a 886 result = OneWireMaster::Success;
j3 63:422be898443a 887 }
j3 63:422be898443a 888 else
j3 63:422be898443a 889 {
j3 63:422be898443a 890 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 891 }
j3 63:422be898443a 892 }
j3 63:422be898443a 893 else
j3 63:422be898443a 894 {
j3 63:422be898443a 895 //buffer empty
j3 63:422be898443a 896 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 897 }
j3 63:422be898443a 898 }
j3 63:422be898443a 899
j3 63:422be898443a 900 return result;
j3 63:422be898443a 901 }
j3 63:422be898443a 902
j3 63:422be898443a 903
j3 63:422be898443a 904 //*********************************************************************
j3 63:422be898443a 905 void Ds2480b::BreakCOM(void)
j3 63:422be898443a 906 {
j3 63:422be898443a 907 while(!_p_serial->writeable());
j3 63:422be898443a 908 //for some reason send_break wouldn't work unless first sending char
j3 63:422be898443a 909 _p_serial->putc(0);
j3 63:422be898443a 910 _p_serial->send_break();
j3 63:422be898443a 911 }
j3 63:422be898443a 912
j3 63:422be898443a 913
j3 63:422be898443a 914 void Ds2480b::FlushCOM(void)
j3 63:422be898443a 915 {
j3 63:422be898443a 916 //reset soft rx_buffer
j3 63:422be898443a 917 rx_buffer.w_idx = 0;
j3 63:422be898443a 918 rx_buffer.r_idx = 0;
j3 63:422be898443a 919 rx_buffer.wrap_error = false;
j3 63:422be898443a 920
j3 63:422be898443a 921 //make sure hardware rx buffer is empty
j3 63:422be898443a 922 while(_p_serial->readable())
j3 63:422be898443a 923 {
j3 63:422be898443a 924 _p_serial->getc();
j3 63:422be898443a 925 }
j3 63:422be898443a 926 }
j3 63:422be898443a 927
j3 63:422be898443a 928
j3 63:422be898443a 929 //*********************************************************************
j3 63:422be898443a 930 void Ds2480b::SetBaudCOM(uint8_t new_baud)
j3 63:422be898443a 931 {
j3 63:422be898443a 932 switch(new_baud)
j3 63:422be898443a 933 {
j3 63:422be898443a 934 case BPS_115200:
j3 63:422be898443a 935 _p_serial->baud(115200);
j3 63:422be898443a 936 break;
j3 63:422be898443a 937
j3 63:422be898443a 938 case BPS_57600:
j3 63:422be898443a 939 _p_serial->baud(57600);
j3 63:422be898443a 940 break;
j3 63:422be898443a 941
j3 63:422be898443a 942 case BPS_19200:
j3 63:422be898443a 943 _p_serial->baud(19200);
j3 63:422be898443a 944 break;
j3 63:422be898443a 945
j3 63:422be898443a 946 case BPS_9600:
j3 63:422be898443a 947 default:
j3 63:422be898443a 948 _p_serial->baud(9600);
j3 63:422be898443a 949 break;
j3 63:422be898443a 950 }
j3 63:422be898443a 951 }
j3 63:422be898443a 952
j3 63:422be898443a 953
j3 63:422be898443a 954 //*********************************************************************
j3 63:422be898443a 955 int32_t Ds2480b::bitacc(uint32_t op, uint32_t state, uint32_t loc, uint8_t *buf)
j3 63:422be898443a 956 {
j3 63:422be898443a 957 int nbyt,nbit;
j3 63:422be898443a 958
j3 63:422be898443a 959 nbyt = (loc / 8);
j3 63:422be898443a 960 nbit = loc - (nbyt * 8);
j3 63:422be898443a 961
j3 63:422be898443a 962 if (op == WRITE_FUNCTION)
j3 63:422be898443a 963 {
j3 63:422be898443a 964 if (state)
j3 63:422be898443a 965 buf[nbyt] |= (0x01 << nbit);
j3 63:422be898443a 966 else
j3 63:422be898443a 967 buf[nbyt] &= ~(0x01 << nbit);
j3 63:422be898443a 968
j3 63:422be898443a 969 return 1;
j3 63:422be898443a 970 }
j3 63:422be898443a 971 else
j3 63:422be898443a 972 return ((buf[nbyt] >> nbit) & 0x01);
IanBenzMaxim 26:a361e3f42ba5 973 }