Maxim Integrated / OneWire

1-Wire® library for mbed. Complete 1-Wire library that supports our silicon masters along with a bit-bang master on the MAX32600MBED platform with one common interface for mbed. Slave support has also been included and more slaves will be added as time permits.

Dependents:   MAXREFDES131_Qt_Demo MAX32630FTHR_iButton_uSD_Logger MAX32630FTHR_DS18B20_uSD_Logger MAXREFDES130_131_Demo ... more

Superseded by MaximInterface.

OneWire_Masters/DS2480B/ds2480b.cpp@67:76776130aec9, 2016-04-21 (annotated)

Committer:
j3
Date:
Thu Apr 21 20:37:45 2016 +0000
Revision:
67:76776130aec9
Parent:
65:a28ac52ca127
Child:
71:562f5c702094
removed tx callback fx since not used

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 65:a28ac52ca127 213 while(_p_serial->readable())
j3 65:a28ac52ca127 214 {
j3 65:a28ac52ca127 215 rx_buffer.buff[rx_buffer.w_idx++] = _p_serial->getc();
j3 65:a28ac52ca127 216 rx_buffer.rx_bytes_available++;
j3 65:a28ac52ca127 217 }
j3 63:422be898443a 218
j3 63:422be898443a 219 if(rx_buffer.w_idx == rx_buffer.r_idx)
j3 63:422be898443a 220 {
j3 63:422be898443a 221 rx_buffer.wrap_error = true;
j3 63:422be898443a 222 }
j3 63:422be898443a 223 }
j3 63:422be898443a 224
j3 63:422be898443a 225
j3 63:422be898443a 226 //*********************************************************************
j3 23:e8e403d61359 227 OneWireMaster::CmdResult Ds2480b::OWInitMaster(void)
j3 14:7b2886a50321 228 {
j3 63:422be898443a 229 _p_serial->attach(this, &Ds2480b::rx_callback, Serial::RxIrq);
j3 63:422be898443a 230
j3 63:422be898443a 231 rx_buffer.w_idx = 0;
j3 63:422be898443a 232 rx_buffer.r_idx = 0;
j3 65:a28ac52ca127 233 rx_buffer.rx_bytes_available = 0;
j3 63:422be898443a 234 rx_buffer.wrap_error = false;
j3 14:7b2886a50321 235
j3 63:422be898443a 236 _ULevel = OneWireMaster::LEVEL_NORMAL;
j3 63:422be898443a 237 _UBaud = BPS_9600;
j3 63:422be898443a 238 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 239 _USpeed = OneWireMaster::SPEED_STANDARD;
j3 17:b646b1e3970b 240
j3 63:422be898443a 241 return DS2480B_Detect();
j3 14:7b2886a50321 242 }
j3 14:7b2886a50321 243
j3 14:7b2886a50321 244
j3 14:7b2886a50321 245 //*********************************************************************
j3 23:e8e403d61359 246 OneWireMaster::CmdResult Ds2480b::OWReset(void)
j3 3:644fc630f958 247 {
j3 63:422be898443a 248 OneWireMaster::CmdResult result;
j3 63:422be898443a 249
j3 63:422be898443a 250 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 251 uint8_t sendlen=0;
j3 63:422be898443a 252
j3 63:422be898443a 253 // make sure normal level
j3 63:422be898443a 254 result = OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 255 if(result == OneWireMaster::Success)
j3 63:422be898443a 256 {
j3 63:422be898443a 257 // check for correct mode
j3 63:422be898443a 258 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 259 {
j3 63:422be898443a 260 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 261 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 262 }
j3 63:422be898443a 263
j3 63:422be898443a 264 // construct the command
j3 63:422be898443a 265 sendpacket[sendlen++] = (uint8_t)(CMD_COMM | FUNCTSEL_RESET | _USpeed);
j3 63:422be898443a 266
j3 63:422be898443a 267 FlushCOM();
j3 63:422be898443a 268
j3 63:422be898443a 269 // send the packet
j3 63:422be898443a 270 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 271 if(result == OneWireMaster::Success)
j3 63:422be898443a 272 {
j3 63:422be898443a 273 // read back the 1 byte response
j3 63:422be898443a 274 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 275 if(result == OneWireMaster::Success)
j3 63:422be898443a 276 {
j3 63:422be898443a 277 // make sure this byte looks like a reset byte
j3 63:422be898443a 278 if(((readbuffer[0] & RB_RESET_MASK) == RB_PRESENCE) || ((readbuffer[0] & RB_RESET_MASK) == RB_ALARMPRESENCE))
j3 63:422be898443a 279 {
j3 63:422be898443a 280 result = OneWireMaster::Success;
j3 63:422be898443a 281 }
j3 63:422be898443a 282 else
j3 63:422be898443a 283 {
j3 63:422be898443a 284 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 285 }
j3 63:422be898443a 286 }
j3 63:422be898443a 287 }
j3 63:422be898443a 288
j3 63:422be898443a 289 if(result != OneWireMaster::Success)
j3 63:422be898443a 290 {
j3 63:422be898443a 291 // an error occured so re-sync with DS2480B
j3 63:422be898443a 292 DS2480B_Detect();
j3 63:422be898443a 293 }
j3 63:422be898443a 294 }
j3 63:422be898443a 295
j3 17:b646b1e3970b 296 return result;
j3 3:644fc630f958 297 }
j3 3:644fc630f958 298
j3 3:644fc630f958 299
j3 63:422be898443a 300 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 301 OneWireMaster::CmdResult Ds2480b::OWTouchBit(uint8_t & sendrecvbit, OWLevel after_level)
j3 3:644fc630f958 302 {
j3 23:e8e403d61359 303 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 304
j3 63:422be898443a 305 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 306 uint8_t sendlen=0;
j3 63:422be898443a 307
j3 63:422be898443a 308 // make sure normal level
j3 63:422be898443a 309 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 310
j3 63:422be898443a 311 // check for correct mode
j3 63:422be898443a 312 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 313 {
j3 63:422be898443a 314 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 315 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 316 }
j3 63:422be898443a 317
j3 63:422be898443a 318 // construct the command
j3 63:422be898443a 319 sendpacket[sendlen] = (sendrecvbit != 0) ? BITPOL_ONE : BITPOL_ZERO;
j3 63:422be898443a 320 sendpacket[sendlen++] |= CMD_COMM | FUNCTSEL_BIT | _USpeed;
j3 63:422be898443a 321
j3 63:422be898443a 322 // flush the buffers
j3 63:422be898443a 323 FlushCOM();
j3 63:422be898443a 324
j3 63:422be898443a 325 // send the packet
j3 63:422be898443a 326 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 327 if(result == OneWireMaster::Success)
j3 63:422be898443a 328 {
j3 63:422be898443a 329 // read back the response
j3 63:422be898443a 330 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 331 if(result == OneWireMaster::Success)
j3 63:422be898443a 332 {
j3 63:422be898443a 333 // interpret the response
j3 63:422be898443a 334 if (((readbuffer[0] & 0xE0) == 0x80) && ((readbuffer[0] & RB_BIT_MASK) == RB_BIT_ONE))
j3 63:422be898443a 335 {
j3 63:422be898443a 336 sendrecvbit = 1;
j3 63:422be898443a 337 result = OneWireMaster::Success;
j3 63:422be898443a 338 }
j3 63:422be898443a 339 else
j3 63:422be898443a 340 {
j3 63:422be898443a 341 sendrecvbit = 0;
j3 63:422be898443a 342 result = OneWireMaster::Success;
j3 63:422be898443a 343 }
j3 63:422be898443a 344 }
j3 63:422be898443a 345 else
j3 63:422be898443a 346 {
j3 63:422be898443a 347 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 348 }
j3 63:422be898443a 349 }
j3 63:422be898443a 350 else
j3 63:422be898443a 351 {
j3 63:422be898443a 352 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 353 }
j3 63:422be898443a 354
j3 63:422be898443a 355 // an error occured so re-sync with DS2480B
j3 63:422be898443a 356 if(result != OneWireMaster::Success)
j3 63:422be898443a 357 {
j3 63:422be898443a 358 DS2480B_Detect();
j3 63:422be898443a 359 }
j3 63:422be898443a 360 else
j3 63:422be898443a 361 {
j3 63:422be898443a 362 result = OWSetLevel(after_level);
j3 63:422be898443a 363 }
j3 63:422be898443a 364
j3 17:b646b1e3970b 365 return result;
j3 3:644fc630f958 366 }
j3 3:644fc630f958 367
j3 3:644fc630f958 368
j3 3:644fc630f958 369 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 370 OneWireMaster::CmdResult Ds2480b::OWWriteByte(uint8_t sendbyte, OWLevel after_level)
IanBenzMaxim 26:a361e3f42ba5 371 {
IanBenzMaxim 26:a361e3f42ba5 372 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 373
j3 63:422be898443a 374 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 375 uint8_t sendlen=0;
j3 63:422be898443a 376
j3 63:422be898443a 377 // make sure normal level
j3 63:422be898443a 378 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 379
j3 63:422be898443a 380 // check for correct mode
j3 63:422be898443a 381 if (_UMode != MODSEL_DATA)
j3 63:422be898443a 382 {
j3 63:422be898443a 383 _UMode = MODSEL_DATA;
j3 63:422be898443a 384 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 385 }
j3 63:422be898443a 386
j3 63:422be898443a 387 // add the byte to send
j3 63:422be898443a 388 sendpacket[sendlen++] = sendbyte;
j3 63:422be898443a 389
j3 63:422be898443a 390 // check for duplication of data that looks like COMMAND mode
j3 63:422be898443a 391 if(sendbyte == MODE_COMMAND)
j3 63:422be898443a 392 {
j3 63:422be898443a 393 sendpacket[sendlen++] = sendbyte;
j3 63:422be898443a 394 }
j3 63:422be898443a 395
j3 63:422be898443a 396 // flush the buffers
j3 63:422be898443a 397 FlushCOM();
j3 63:422be898443a 398
j3 63:422be898443a 399 // send the packet
j3 63:422be898443a 400 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 401 if(result == OneWireMaster::Success)
j3 63:422be898443a 402 {
j3 63:422be898443a 403 // read back the 1 byte response
j3 63:422be898443a 404 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 405 if((result == OneWireMaster::Success) && (readbuffer[0] == sendbyte))
j3 63:422be898443a 406 {
j3 63:422be898443a 407 result = OneWireMaster::Success;
j3 63:422be898443a 408 }
j3 63:422be898443a 409 else
j3 63:422be898443a 410 {
j3 63:422be898443a 411 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 412 }
j3 63:422be898443a 413 }
j3 63:422be898443a 414 else
j3 63:422be898443a 415 {
j3 63:422be898443a 416 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 417 }
j3 63:422be898443a 418
j3 63:422be898443a 419 // an error occured so re-sync with DS2480B
j3 63:422be898443a 420 if(result != OneWireMaster::Success)
j3 63:422be898443a 421 {
j3 63:422be898443a 422 DS2480B_Detect();
j3 63:422be898443a 423 }
j3 63:422be898443a 424 else
j3 63:422be898443a 425 {
j3 63:422be898443a 426 result = OWSetLevel(after_level);
j3 63:422be898443a 427 }
j3 63:422be898443a 428
IanBenzMaxim 26:a361e3f42ba5 429 return result;
IanBenzMaxim 26:a361e3f42ba5 430 }
IanBenzMaxim 26:a361e3f42ba5 431
IanBenzMaxim 26:a361e3f42ba5 432
IanBenzMaxim 26:a361e3f42ba5 433 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 434 OneWireMaster::CmdResult Ds2480b::OWReadByte(uint8_t & recvbyte, OWLevel after_level)
j3 3:644fc630f958 435 {
j3 23:e8e403d61359 436 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 63:422be898443a 437
j3 63:422be898443a 438 uint8_t readbuffer[10],sendpacket[10];
j3 63:422be898443a 439 uint8_t sendlen=0;
j3 63:422be898443a 440
j3 63:422be898443a 441 // make sure normal level
j3 63:422be898443a 442 OWSetLevel(OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 443
j3 63:422be898443a 444 // check for correct mode
j3 63:422be898443a 445 if (_UMode != MODSEL_DATA)
j3 63:422be898443a 446 {
j3 63:422be898443a 447 _UMode = MODSEL_DATA;
j3 63:422be898443a 448 sendpacket[sendlen++] = MODE_DATA;
j3 63:422be898443a 449 }
j3 63:422be898443a 450
j3 63:422be898443a 451 // add the byte to send
j3 63:422be898443a 452 sendpacket[sendlen++] = 0xFF;
j3 63:422be898443a 453
j3 63:422be898443a 454 // flush the buffers
j3 63:422be898443a 455 FlushCOM();
j3 63:422be898443a 456
j3 63:422be898443a 457 // send the packet
j3 63:422be898443a 458 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 459 if(result == OneWireMaster::Success)
j3 63:422be898443a 460 {
j3 63:422be898443a 461 // read back the 1 byte response
j3 63:422be898443a 462 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 463 if(result == OneWireMaster::Success)
j3 63:422be898443a 464 {
j3 63:422be898443a 465 recvbyte = readbuffer[0];
j3 63:422be898443a 466 result = OneWireMaster::Success;
j3 63:422be898443a 467 }
j3 63:422be898443a 468 else
j3 63:422be898443a 469 {
j3 63:422be898443a 470 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 471 }
j3 63:422be898443a 472 }
j3 63:422be898443a 473 else
j3 63:422be898443a 474 {
j3 63:422be898443a 475 result = OneWireMaster::CommunicationWriteError;
j3 63:422be898443a 476 }
j3 63:422be898443a 477
j3 63:422be898443a 478 // an error occured so re-sync with DS2480B
j3 63:422be898443a 479 if(result != OneWireMaster::Success)
j3 63:422be898443a 480 {
j3 63:422be898443a 481 DS2480B_Detect();
j3 63:422be898443a 482 }
j3 63:422be898443a 483 else
j3 63:422be898443a 484 {
j3 63:422be898443a 485 result = OWSetLevel(after_level);
j3 63:422be898443a 486 }
j3 63:422be898443a 487
j3 17:b646b1e3970b 488 return result;
j3 3:644fc630f958 489 }
j3 3:644fc630f958 490
j3 3:644fc630f958 491
j3 3:644fc630f958 492 //*********************************************************************
j3 23:e8e403d61359 493 OneWireMaster::CmdResult Ds2480b::OWWriteBlock(const uint8_t *tran_buf, uint8_t tran_len)
j3 3:644fc630f958 494 {
j3 63:422be898443a 495 OneWireMaster::CmdResult result;
j3 63:422be898443a 496 uint8_t idx = 0;
j3 63:422be898443a 497
j3 63:422be898443a 498 do
j3 63:422be898443a 499 {
j3 63:422be898443a 500 result = OWWriteByte(tran_buf[idx++], OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 501 }
j3 63:422be898443a 502 while((result == OneWireMaster::Success) && (idx < tran_len));
j3 63:422be898443a 503
j3 17:b646b1e3970b 504 return result;
j3 17:b646b1e3970b 505 }
j3 17:b646b1e3970b 506
j3 17:b646b1e3970b 507
j3 17:b646b1e3970b 508 //*********************************************************************
j3 23:e8e403d61359 509 OneWireMaster::CmdResult Ds2480b::OWReadBlock(uint8_t *rx_buf, uint8_t rx_len)
j3 17:b646b1e3970b 510 {
j3 63:422be898443a 511 OneWireMaster::CmdResult result;
j3 63:422be898443a 512 uint8_t idx = 0;
j3 3:644fc630f958 513
j3 63:422be898443a 514 do
j3 63:422be898443a 515 {
j3 63:422be898443a 516 result = OWReadByte(rx_buf[idx++], OneWireMaster::LEVEL_NORMAL);
j3 63:422be898443a 517 }
j3 63:422be898443a 518 while((result == OneWireMaster::Success) && (idx < rx_len));
j3 63:422be898443a 519
j3 17:b646b1e3970b 520 return result;
j3 17:b646b1e3970b 521 }
j3 17:b646b1e3970b 522
j3 17:b646b1e3970b 523
j3 17:b646b1e3970b 524 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 525 OneWireMaster::CmdResult Ds2480b::OWSetSpeed(OWSpeed new_speed)
j3 17:b646b1e3970b 526 {
j3 23:e8e403d61359 527 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 17:b646b1e3970b 528
j3 17:b646b1e3970b 529 //TODO
j3 17:b646b1e3970b 530
j3 17:b646b1e3970b 531 return result;
j3 3:644fc630f958 532 }
j3 3:644fc630f958 533
j3 3:644fc630f958 534
j3 3:644fc630f958 535 //*********************************************************************
IanBenzMaxim 32:bce180b544ed 536 OneWireMaster::CmdResult Ds2480b::OWSetLevel(OWLevel new_level)
j3 3:644fc630f958 537 {
j3 63:422be898443a 538 OneWireMaster::CmdResult result = OneWireMaster::Success;
j3 63:422be898443a 539
j3 63:422be898443a 540 uint8_t sendpacket[10],readbuffer[10];
j3 63:422be898443a 541 uint8_t sendlen=0;
j3 63:422be898443a 542
j3 63:422be898443a 543 // check if need to change level
j3 63:422be898443a 544 if(new_level != _ULevel)
j3 63:422be898443a 545 {
j3 63:422be898443a 546 // check for correct mode
j3 63:422be898443a 547 if(_UMode != MODSEL_COMMAND)
j3 63:422be898443a 548 {
j3 63:422be898443a 549 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 550 sendpacket[sendlen++] = MODE_COMMAND;
j3 63:422be898443a 551 }
j3 63:422be898443a 552
j3 63:422be898443a 553 // check if just putting back to normal
j3 63:422be898443a 554 if(new_level == OneWireMaster::LEVEL_NORMAL)
j3 63:422be898443a 555 {
j3 63:422be898443a 556 // stop pulse command
j3 63:422be898443a 557 sendpacket[sendlen++] = MODE_STOP_PULSE;
j3 63:422be898443a 558
j3 63:422be898443a 559 // add the command to begin the pulse WITHOUT prime
j3 63:422be898443a 560 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V | PRIME5V_FALSE;
j3 63:422be898443a 561
j3 63:422be898443a 562 // stop pulse command
j3 63:422be898443a 563 sendpacket[sendlen++] = MODE_STOP_PULSE;
j3 63:422be898443a 564
j3 63:422be898443a 565 FlushCOM();
j3 63:422be898443a 566
j3 63:422be898443a 567 // send the packet
j3 63:422be898443a 568 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 569 if(result == OneWireMaster::Success)
j3 63:422be898443a 570 {
j3 63:422be898443a 571 // read back the 1 byte response
j3 63:422be898443a 572 result = ReadCOM(2,readbuffer);
j3 63:422be898443a 573 if(result == OneWireMaster::Success)
j3 63:422be898443a 574 {
j3 63:422be898443a 575 // check response byte
j3 63:422be898443a 576 if (((readbuffer[0] & 0xE0) == 0xE0) && ((readbuffer[1] & 0xE0) == 0xE0))
j3 63:422be898443a 577 {
j3 63:422be898443a 578 _ULevel = OneWireMaster::LEVEL_NORMAL;
j3 63:422be898443a 579 }
j3 63:422be898443a 580 else
j3 63:422be898443a 581 {
j3 63:422be898443a 582 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 583 }
j3 63:422be898443a 584 }
j3 63:422be898443a 585 }
j3 63:422be898443a 586 }
j3 63:422be898443a 587 // set new level
j3 63:422be898443a 588 else
j3 63:422be898443a 589 {
j3 63:422be898443a 590 // set the SPUD time value
j3 63:422be898443a 591 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_5VPULSE | PARMSET_infinite;
j3 63:422be898443a 592 // add the command to begin the pulse
j3 63:422be898443a 593 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V;
j3 63:422be898443a 594
j3 63:422be898443a 595 FlushCOM();
j3 63:422be898443a 596
j3 63:422be898443a 597 // send the packet
j3 63:422be898443a 598 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 599 if(result == OneWireMaster::Success)
j3 63:422be898443a 600 {
j3 63:422be898443a 601 // read back the 1 byte response from setting time limit
j3 63:422be898443a 602 result = ReadCOM(1,readbuffer);
j3 63:422be898443a 603 if(result == OneWireMaster::Success)
j3 63:422be898443a 604 {
j3 63:422be898443a 605 // check response byte
j3 63:422be898443a 606 if ((readbuffer[0] & 0x81) == 0)
j3 63:422be898443a 607 {
j3 63:422be898443a 608 _ULevel = new_level;
j3 63:422be898443a 609 }
j3 63:422be898443a 610 else
j3 63:422be898443a 611 {
j3 63:422be898443a 612 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 613 }
j3 63:422be898443a 614 }
j3 63:422be898443a 615 }
j3 63:422be898443a 616 }
j3 63:422be898443a 617
j3 63:422be898443a 618 // if lost communication with DS2480B then reset
j3 63:422be898443a 619 if(result != OneWireMaster::Success)
j3 63:422be898443a 620 {
j3 63:422be898443a 621 DS2480B_Detect();
j3 63:422be898443a 622 }
j3 63:422be898443a 623
j3 63:422be898443a 624 }
j3 63:422be898443a 625
j3 63:422be898443a 626 return result;
j3 63:422be898443a 627 }
j3 63:422be898443a 628
j3 63:422be898443a 629
j3 63:422be898443a 630 //*********************************************************************
j3 63:422be898443a 631 OneWireMaster::CmdResult Ds2480b::DS2480B_Detect(void)
j3 63:422be898443a 632 {
j3 63:422be898443a 633 OneWireMaster::CmdResult result;
j3 63:422be898443a 634
j3 63:422be898443a 635 uint8_t sendpacket[10],readbuffer[10];
j3 63:422be898443a 636 uint8_t sendlen=0;
j3 63:422be898443a 637
j3 63:422be898443a 638 // reset modes
j3 63:422be898443a 639 _UMode = MODSEL_COMMAND;
j3 63:422be898443a 640 _UBaud = BPS_9600;
j3 63:422be898443a 641 _USpeed = SPEEDSEL_FLEX;
j3 63:422be898443a 642
j3 63:422be898443a 643 // set the baud rate to 9600
j3 63:422be898443a 644 SetBaudCOM(_UBaud);
j3 63:422be898443a 645
j3 63:422be898443a 646 // send a break to reset the DS2480B
j3 63:422be898443a 647 BreakCOM();
j3 63:422be898443a 648
j3 63:422be898443a 649 // delay to let line settle
j3 63:422be898443a 650 wait_ms(2);
j3 63:422be898443a 651
j3 63:422be898443a 652 FlushCOM();
j3 63:422be898443a 653
j3 63:422be898443a 654 // send the timing byte
j3 63:422be898443a 655 sendpacket[0] = 0xC1;
j3 63:422be898443a 656 result = WriteCOM(1,sendpacket);
j3 63:422be898443a 657 if(result == OneWireMaster::Success)
j3 63:422be898443a 658 {
j3 63:422be898443a 659 // delay to let line settle
j3 63:422be898443a 660 wait_ms(2);
j3 63:422be898443a 661
j3 63:422be898443a 662 // set the FLEX configuration parameters
j3 63:422be898443a 663 // default PDSRC = 1.37Vus
j3 63:422be898443a 664 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SLEW | PARMSET_Slew1p37Vus;
j3 63:422be898443a 665 // default W1LT = 10us
j3 63:422be898443a 666 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_WRITE1LOW | PARMSET_Write10us;
j3 63:422be898443a 667 // default DSO/WORT = 8us
j3 63:422be898443a 668 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SAMPLEOFFSET | PARMSET_SampOff8us;
j3 63:422be898443a 669
j3 63:422be898443a 670 // construct the command to read the baud rate (to test command block)
j3 63:422be898443a 671 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 63:422be898443a 672
j3 63:422be898443a 673 // also do 1 bit operation (to test 1-Wire block)
j3 63:422be898443a 674 sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_BIT | _UBaud | BITPOL_ONE;
j3 63:422be898443a 675
j3 63:422be898443a 676 FlushCOM();
j3 63:422be898443a 677
j3 63:422be898443a 678 // send the packet
j3 63:422be898443a 679 result = WriteCOM(sendlen,sendpacket);
j3 63:422be898443a 680 if(result == OneWireMaster::Success)
j3 63:422be898443a 681 {
j3 63:422be898443a 682 // read back the response
j3 63:422be898443a 683 result = ReadCOM(5,readbuffer);
j3 63:422be898443a 684 if(result == OneWireMaster::Success)
j3 63:422be898443a 685 {
j3 63:422be898443a 686 // look at the baud rate and bit operation
j3 63:422be898443a 687 // to see if the response makes sense
j3 63:422be898443a 688 if (((readbuffer[3] & 0xF1) == 0x00) && ((readbuffer[3] & 0x0E) == _UBaud) && ((readbuffer[4] & 0xF0) == 0x90) && ((readbuffer[4] & 0x0C) == _UBaud))
j3 63:422be898443a 689 {
j3 63:422be898443a 690 result = OneWireMaster::Success;
j3 63:422be898443a 691 }
j3 63:422be898443a 692 else
j3 63:422be898443a 693 {
j3 63:422be898443a 694 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 695 }
j3 63:422be898443a 696 }
j3 63:422be898443a 697 }
j3 63:422be898443a 698 }
j3 63:422be898443a 699
j3 63:422be898443a 700 return result;
j3 63:422be898443a 701 }
j3 63:422be898443a 702
j3 63:422be898443a 703
j3 63:422be898443a 704 //*********************************************************************
j3 63:422be898443a 705 OneWireMaster::CmdResult Ds2480b::DS2480B_ChangeBaud(DS2480B_BPS newbaud)
j3 63:422be898443a 706 {
j3 65:a28ac52ca127 707 OneWireMaster::CmdResult result = OneWireMaster::Success;
j3 65:a28ac52ca127 708
j3 65:a28ac52ca127 709 uint8_t readbuffer[5],sendpacket[5],sendpacket2[5];
j3 65:a28ac52ca127 710 uint8_t sendlen=0,sendlen2=0;
j3 65:a28ac52ca127 711
j3 65:a28ac52ca127 712 //see if diffenent then current baud rate
j3 65:a28ac52ca127 713 if(_UBaud != newbaud)
j3 65:a28ac52ca127 714 {
j3 65:a28ac52ca127 715 // build the command packet
j3 65:a28ac52ca127 716 // check for correct mode
j3 65:a28ac52ca127 717 if(_UMode != MODSEL_COMMAND)
j3 65:a28ac52ca127 718 {
j3 65:a28ac52ca127 719 _UMode = MODSEL_COMMAND;
j3 65:a28ac52ca127 720 sendpacket[sendlen++] = MODE_COMMAND;
j3 65:a28ac52ca127 721 }
j3 65:a28ac52ca127 722 // build the command
j3 65:a28ac52ca127 723 sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_BAUDRATE | newbaud;
j3 63:422be898443a 724
j3 65:a28ac52ca127 725 // flush the buffers
j3 65:a28ac52ca127 726 FlushCOM();
j3 65:a28ac52ca127 727
j3 65:a28ac52ca127 728 // send the packet
j3 65:a28ac52ca127 729 result = WriteCOM(sendlen,sendpacket);
j3 65:a28ac52ca127 730 if(result == OneWireMaster::Success)
j3 65:a28ac52ca127 731 {
j3 65:a28ac52ca127 732 // make sure buffer is flushed
j3 65:a28ac52ca127 733 wait_ms(5);
j3 63:422be898443a 734
j3 65:a28ac52ca127 735 // change our baud rate
j3 65:a28ac52ca127 736 SetBaudCOM(newbaud);
j3 65:a28ac52ca127 737 _UBaud = newbaud;
j3 65:a28ac52ca127 738
j3 65:a28ac52ca127 739 // wait for things to settle
j3 65:a28ac52ca127 740 wait_ms(5);
j3 65:a28ac52ca127 741
j3 65:a28ac52ca127 742 // build a command packet to read back baud rate
j3 65:a28ac52ca127 743 sendpacket2[sendlen2++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
j3 65:a28ac52ca127 744
j3 65:a28ac52ca127 745 // flush the buffers
j3 65:a28ac52ca127 746 FlushCOM();
j3 63:422be898443a 747
j3 65:a28ac52ca127 748 // send the packet
j3 65:a28ac52ca127 749 result = WriteCOM(sendlen2,sendpacket2);
j3 65:a28ac52ca127 750 if(result == OneWireMaster::Success)
j3 63:422be898443a 751 {
j3 65:a28ac52ca127 752 // read back the 1 byte response
j3 65:a28ac52ca127 753 result = ReadCOM(1,readbuffer);
j3 65:a28ac52ca127 754 if(result == OneWireMaster::Success)
j3 65:a28ac52ca127 755 {
j3 65:a28ac52ca127 756 // verify correct baud
j3 65:a28ac52ca127 757 if((readbuffer[0] & 0x0E) == (sendpacket[sendlen-1] & 0x0E))
j3 65:a28ac52ca127 758 {
j3 65:a28ac52ca127 759 result = OneWireMaster::Success;
j3 65:a28ac52ca127 760 }
j3 65:a28ac52ca127 761 else
j3 65:a28ac52ca127 762 {
j3 65:a28ac52ca127 763 result = OneWireMaster::OperationFailure;
j3 65:a28ac52ca127 764 }
j3 65:a28ac52ca127 765 }
j3 65:a28ac52ca127 766 else
j3 65:a28ac52ca127 767 {
j3 65:a28ac52ca127 768 result = OneWireMaster::CommunicationReadError;
j3 65:a28ac52ca127 769 }
j3 63:422be898443a 770 }
j3 65:a28ac52ca127 771 else
j3 65:a28ac52ca127 772 {
j3 65:a28ac52ca127 773 result = OneWireMaster::CommunicationWriteError;
j3 65:a28ac52ca127 774 }
j3 65:a28ac52ca127 775 }
j3 65:a28ac52ca127 776 else
j3 65:a28ac52ca127 777 {
j3 65:a28ac52ca127 778 result = OneWireMaster::CommunicationWriteError;
j3 65:a28ac52ca127 779 }
j3 65:a28ac52ca127 780 }
j3 65:a28ac52ca127 781
j3 65:a28ac52ca127 782 // if lost communication with DS2480B then reset
j3 65:a28ac52ca127 783 if(result != OneWireMaster::Success)
j3 65:a28ac52ca127 784 {
j3 65:a28ac52ca127 785 DS2480B_Detect();
j3 65:a28ac52ca127 786 }
j3 65:a28ac52ca127 787
j3 65:a28ac52ca127 788 return result;
j3 63:422be898443a 789 }
j3 63:422be898443a 790
j3 63:422be898443a 791
j3 63:422be898443a 792 //*********************************************************************
j3 63:422be898443a 793 OneWireMaster::CmdResult Ds2480b::WriteCOM(uint32_t outlen, uint8_t *outbuf)
j3 63:422be898443a 794 {
j3 23:e8e403d61359 795 OneWireMaster::CmdResult result = OneWireMaster::OperationFailure;
j3 3:644fc630f958 796
j3 63:422be898443a 797 Timer t;
j3 63:422be898443a 798 uint32_t t_val;
j3 63:422be898443a 799 uint32_t timeout;
j3 63:422be898443a 800 uint8_t idx = 0;
j3 63:422be898443a 801
j3 63:422be898443a 802 //calculate timeout, the time needed to tx 1 byte
j3 65:a28ac52ca127 803 //double for 115200 due to timer object inaccuracies
j3 63:422be898443a 804 switch(_UBaud)
j3 63:422be898443a 805 {
j3 63:422be898443a 806 case BPS_115200:
j3 65:a28ac52ca127 807 timeout = ((1000000/115200)*20);
j3 63:422be898443a 808 break;
j3 63:422be898443a 809
j3 63:422be898443a 810 case BPS_57600:
j3 63:422be898443a 811 timeout = ((1000000/57600)*10);
j3 63:422be898443a 812 break;
j3 63:422be898443a 813
j3 63:422be898443a 814 case BPS_19200:
j3 63:422be898443a 815 timeout = ((1000000/19200)*10);
j3 63:422be898443a 816 break;
j3 63:422be898443a 817
j3 63:422be898443a 818 case BPS_9600:
j3 63:422be898443a 819 default:
j3 63:422be898443a 820 timeout = ((1000000/9600)*10);
j3 63:422be898443a 821 break;
j3 63:422be898443a 822 }
j3 63:422be898443a 823
j3 63:422be898443a 824 t.start();
j3 63:422be898443a 825 do
j3 63:422be898443a 826 {
j3 63:422be898443a 827 t.reset();
j3 63:422be898443a 828 do
j3 63:422be898443a 829 {
j3 63:422be898443a 830 t_val = t.read_us();
j3 63:422be898443a 831 }
j3 63:422be898443a 832 while(!_p_serial->writeable() && (t_val < timeout));
j3 63:422be898443a 833
j3 63:422be898443a 834 if(t_val < timeout)
j3 63:422be898443a 835 {
j3 63:422be898443a 836 _p_serial->putc(outbuf[idx++]);
j3 63:422be898443a 837 result = OneWireMaster::Success;
j3 63:422be898443a 838 }
j3 63:422be898443a 839 else
j3 63:422be898443a 840 {
j3 63:422be898443a 841 result = OneWireMaster::TimeoutError;
j3 63:422be898443a 842 }
j3 63:422be898443a 843 }
j3 63:422be898443a 844 while((idx < outlen) && (result == OneWireMaster::Success));
j3 3:644fc630f958 845
j3 17:b646b1e3970b 846 return result;
j3 63:422be898443a 847 }
j3 63:422be898443a 848
j3 63:422be898443a 849
j3 63:422be898443a 850 //*********************************************************************
j3 63:422be898443a 851 OneWireMaster::CmdResult Ds2480b::ReadCOM(uint32_t inlen, uint8_t *inbuf)
j3 63:422be898443a 852 {
j3 63:422be898443a 853 OneWireMaster::CmdResult result;
j3 65:a28ac52ca127 854 Timer t;
j3 63:422be898443a 855 uint32_t num_bytes_read= 0;
j3 63:422be898443a 856 uint32_t timeout;
j3 65:a28ac52ca127 857 uint32_t micro_seconds;
j3 63:422be898443a 858
j3 65:a28ac52ca127 859 //calculate timeout, 10x the time needed to recieve inlen bytes
j3 65:a28ac52ca127 860 //double for 115200 due to timer object inaccuracies
j3 63:422be898443a 861 switch(_UBaud)
j3 63:422be898443a 862 {
j3 63:422be898443a 863 case BPS_115200:
j3 65:a28ac52ca127 864 timeout = ((1000000/115200)*200)*inlen;
j3 63:422be898443a 865 break;
j3 63:422be898443a 866
j3 63:422be898443a 867 case BPS_57600:
j3 65:a28ac52ca127 868 timeout = ((1000000/57600)*100)*inlen;
j3 63:422be898443a 869 break;
j3 63:422be898443a 870
j3 63:422be898443a 871 case BPS_19200:
j3 65:a28ac52ca127 872 timeout = ((1000000/19200)*100)*inlen;
j3 63:422be898443a 873 break;
j3 63:422be898443a 874
j3 63:422be898443a 875 case BPS_9600:
j3 63:422be898443a 876 default:
j3 65:a28ac52ca127 877 timeout = ((1000000/9600)*100)*inlen;
j3 63:422be898443a 878 break;
j3 63:422be898443a 879 }
j3 63:422be898443a 880
j3 63:422be898443a 881 if(rx_buffer.wrap_error)
j3 63:422be898443a 882 {
j3 63:422be898443a 883 //reset rx buffer, error, and return failure
j3 63:422be898443a 884 rx_buffer.w_idx = 0;
j3 63:422be898443a 885 rx_buffer.r_idx = 0;
j3 65:a28ac52ca127 886 rx_buffer.rx_bytes_available = 0;
j3 63:422be898443a 887 rx_buffer.wrap_error = false;
j3 63:422be898443a 888
j3 63:422be898443a 889 result = OneWireMaster::OperationFailure;
j3 63:422be898443a 890 }
j3 63:422be898443a 891 else
j3 63:422be898443a 892 {
j3 65:a28ac52ca127 893 t.start();
j3 65:a28ac52ca127 894 t.reset();
j3 65:a28ac52ca127 895 do
j3 63:422be898443a 896 {
j3 63:422be898443a 897 do
j3 63:422be898443a 898 {
j3 65:a28ac52ca127 899 micro_seconds = t.read_us();
j3 63:422be898443a 900 }
j3 65:a28ac52ca127 901 while(!rx_buffer.rx_bytes_available && (micro_seconds < timeout));
j3 63:422be898443a 902
j3 65:a28ac52ca127 903 if(rx_buffer.rx_bytes_available)
j3 63:422be898443a 904 {
j3 65:a28ac52ca127 905 inbuf[num_bytes_read++] = rx_buffer.buff[rx_buffer.r_idx++];
j3 65:a28ac52ca127 906 rx_buffer.rx_bytes_available--;
j3 65:a28ac52ca127 907 }
j3 65:a28ac52ca127 908 }
j3 65:a28ac52ca127 909 while((num_bytes_read < inlen) && (micro_seconds < timeout) && !rx_buffer.wrap_error);
j3 65:a28ac52ca127 910 t.stop();
j3 65:a28ac52ca127 911
j3 65:a28ac52ca127 912 if(num_bytes_read == inlen)
j3 65:a28ac52ca127 913 {
j3 65:a28ac52ca127 914 result = OneWireMaster::Success;
j3 65:a28ac52ca127 915 }
j3 65:a28ac52ca127 916 else if(micro_seconds > timeout)
j3 65:a28ac52ca127 917 {
j3 65:a28ac52ca127 918 result = OneWireMaster::TimeoutError;
j3 63:422be898443a 919 }
j3 63:422be898443a 920 else
j3 63:422be898443a 921 {
j3 65:a28ac52ca127 922 //reset rx buffer, error, and return failure
j3 65:a28ac52ca127 923 rx_buffer.w_idx = 0;
j3 65:a28ac52ca127 924 rx_buffer.r_idx = 0;
j3 65:a28ac52ca127 925 rx_buffer.rx_bytes_available = 0;
j3 65:a28ac52ca127 926 rx_buffer.wrap_error = false;
j3 65:a28ac52ca127 927
j3 65:a28ac52ca127 928 result = OneWireMaster::CommunicationReadError;
j3 63:422be898443a 929 }
j3 63:422be898443a 930 }
j3 63:422be898443a 931
j3 63:422be898443a 932 return result;
j3 63:422be898443a 933 }
j3 63:422be898443a 934
j3 63:422be898443a 935
j3 63:422be898443a 936 //*********************************************************************
j3 63:422be898443a 937 void Ds2480b::BreakCOM(void)
j3 63:422be898443a 938 {
j3 63:422be898443a 939 while(!_p_serial->writeable());
j3 63:422be898443a 940 //for some reason send_break wouldn't work unless first sending char
j3 63:422be898443a 941 _p_serial->putc(0);
j3 63:422be898443a 942 _p_serial->send_break();
j3 63:422be898443a 943 }
j3 63:422be898443a 944
j3 63:422be898443a 945
j3 63:422be898443a 946 void Ds2480b::FlushCOM(void)
j3 63:422be898443a 947 {
j3 63:422be898443a 948 //reset soft rx_buffer
j3 63:422be898443a 949 rx_buffer.w_idx = 0;
j3 63:422be898443a 950 rx_buffer.r_idx = 0;
j3 63:422be898443a 951 rx_buffer.wrap_error = false;
j3 63:422be898443a 952
j3 63:422be898443a 953 //make sure hardware rx buffer is empty
j3 63:422be898443a 954 while(_p_serial->readable())
j3 63:422be898443a 955 {
j3 63:422be898443a 956 _p_serial->getc();
j3 63:422be898443a 957 }
j3 65:a28ac52ca127 958
j3 65:a28ac52ca127 959 /*Not sure how to flush tx buffer without sending data out on the bus.
j3 65:a28ac52ca127 960 from the example in AN192, the data shouldn't be sent, just aborted
j3 65:a28ac52ca127 961 and the buffer cleaned out, http://pdfserv.maximintegrated.com/en/an/AN192.pdf
j3 65:a28ac52ca127 962 Below is what was used in AN192 example code using windows drivers
j3 65:a28ac52ca127 963 */
j3 65:a28ac52ca127 964
j3 65:a28ac52ca127 965 //PurgeComm(ComID, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR );
j3 63:422be898443a 966 }
j3 63:422be898443a 967
j3 63:422be898443a 968
j3 63:422be898443a 969 //*********************************************************************
j3 63:422be898443a 970 void Ds2480b::SetBaudCOM(uint8_t new_baud)
j3 63:422be898443a 971 {
j3 63:422be898443a 972 switch(new_baud)
j3 63:422be898443a 973 {
j3 63:422be898443a 974 case BPS_115200:
j3 63:422be898443a 975 _p_serial->baud(115200);
j3 63:422be898443a 976 break;
j3 63:422be898443a 977
j3 63:422be898443a 978 case BPS_57600:
j3 63:422be898443a 979 _p_serial->baud(57600);
j3 63:422be898443a 980 break;
j3 63:422be898443a 981
j3 63:422be898443a 982 case BPS_19200:
j3 63:422be898443a 983 _p_serial->baud(19200);
j3 63:422be898443a 984 break;
j3 63:422be898443a 985
j3 63:422be898443a 986 case BPS_9600:
j3 63:422be898443a 987 default:
j3 63:422be898443a 988 _p_serial->baud(9600);
j3 63:422be898443a 989 break;
j3 63:422be898443a 990 }
j3 63:422be898443a 991 }
j3 63:422be898443a 992
j3 63:422be898443a 993
j3 63:422be898443a 994 //*********************************************************************
j3 63:422be898443a 995 int32_t Ds2480b::bitacc(uint32_t op, uint32_t state, uint32_t loc, uint8_t *buf)
j3 63:422be898443a 996 {
j3 65:a28ac52ca127 997 int nbyt,nbit;
j3 63:422be898443a 998
j3 65:a28ac52ca127 999 nbyt = (loc / 8);
j3 65:a28ac52ca127 1000 nbit = loc - (nbyt * 8);
j3 63:422be898443a 1001
j3 65:a28ac52ca127 1002 if(op == WRITE_FUNCTION)
j3 65:a28ac52ca127 1003 {
j3 65:a28ac52ca127 1004 if (state)
j3 65:a28ac52ca127 1005 {
j3 65:a28ac52ca127 1006 buf[nbyt] |= (0x01 << nbit);
j3 65:a28ac52ca127 1007 }
j3 65:a28ac52ca127 1008 else
j3 65:a28ac52ca127 1009 {
j3 65:a28ac52ca127 1010 buf[nbyt] &= ~(0x01 << nbit);
j3 65:a28ac52ca127 1011 }
j3 63:422be898443a 1012
j3 65:a28ac52ca127 1013 return 1;
j3 65:a28ac52ca127 1014 }
j3 65:a28ac52ca127 1015 else
j3 65:a28ac52ca127 1016 {
j3 65:a28ac52ca127 1017 return ((buf[nbyt] >> nbit) & 0x01);
j3 65:a28ac52ca127 1018 }
IanBenzMaxim 26:a361e3f42ba5 1019 }