Maxim Integrated
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Superseded by MaximInterface.
Masters/DS2480B/DS2480B.cpp@109:5c9180b4be25, 2016-08-05 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Fri Aug 05 15:06:47 2016 -0500
- Revision:
- 109:5c9180b4be25
- Parent:
- 104:3f48daed532b
- Child:
- 112:82eb520a644b
Begin cleanup of DS2480B. Removed receive buffer and some unused functionality.
Who changed what in which revision?
| User | Revision | Line number | New 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 | |
| IanBenzMaxim | 109:5c9180b4be25 | 177 | uint32_t timeout = 1000000 * 10; |
| IanBenzMaxim | 109:5c9180b4be25 | 178 | |
| IanBenzMaxim | 109:5c9180b4be25 | 179 | switch (baud) |
| IanBenzMaxim | 109:5c9180b4be25 | 180 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 181 | case DS2480B::Baud115200bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 182 | timeout = (timeout * 2) / 115200; |
| IanBenzMaxim | 109:5c9180b4be25 | 183 | break; |
| j3 | 3:644fc630f958 | 184 | |
| IanBenzMaxim | 109:5c9180b4be25 | 185 | case DS2480B::Baud57600bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 186 | timeout /= 57600; |
| IanBenzMaxim | 109:5c9180b4be25 | 187 | break; |
| IanBenzMaxim | 109:5c9180b4be25 | 188 | |
| IanBenzMaxim | 109:5c9180b4be25 | 189 | case DS2480B::Baud19200bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 190 | timeout /= 19200; |
| IanBenzMaxim | 109:5c9180b4be25 | 191 | break; |
| IanBenzMaxim | 109:5c9180b4be25 | 192 | |
| IanBenzMaxim | 109:5c9180b4be25 | 193 | case DS2480B::Baud9600bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 194 | default: |
| IanBenzMaxim | 109:5c9180b4be25 | 195 | timeout /= 9600; |
| IanBenzMaxim | 109:5c9180b4be25 | 196 | break; |
| j3 | 3:644fc630f958 | 197 | } |
| IanBenzMaxim | 109:5c9180b4be25 | 198 | |
| IanBenzMaxim | 109:5c9180b4be25 | 199 | return timeout; |
| j3 | 3:644fc630f958 | 200 | } |
| j3 | 3:644fc630f958 | 201 | |
| IanBenzMaxim | 109:5c9180b4be25 | 202 | DS2480B::DS2480B(PinName tx, PinName rx) |
| IanBenzMaxim | 109:5c9180b4be25 | 203 | : serial(tx, rx) |
| j3 | 63:422be898443a | 204 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 205 | |
| j3 | 63:422be898443a | 206 | } |
| j3 | 63:422be898443a | 207 | |
| IanBenzMaxim | 75:8b627804927c | 208 | OneWireMaster::CmdResult DS2480B::OWInitMaster() |
| j3 | 14:7b2886a50321 | 209 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 210 | return detect(); |
| j3 | 14:7b2886a50321 | 211 | } |
| j3 | 14:7b2886a50321 | 212 | |
| IanBenzMaxim | 75:8b627804927c | 213 | OneWireMaster::CmdResult DS2480B::OWReset() |
| j3 | 3:644fc630f958 | 214 | { |
| j3 | 63:422be898443a | 215 | OneWireMaster::CmdResult result; |
| j3 | 63:422be898443a | 216 | |
| IanBenzMaxim | 74:23be10c32fa3 | 217 | uint8_t readbuffer[10], sendpacket[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 218 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 219 | |
| j3 | 63:422be898443a | 220 | // make sure normal level |
| IanBenzMaxim | 75:8b627804927c | 221 | result = OWSetLevel(OneWireMaster::NormalLevel); |
| IanBenzMaxim | 74:23be10c32fa3 | 222 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 223 | { |
| j3 | 63:422be898443a | 224 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 225 | if (mode != MODSEL_COMMAND) |
| j3 | 63:422be898443a | 226 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 227 | mode = MODSEL_COMMAND; |
| j3 | 63:422be898443a | 228 | sendpacket[sendlen++] = MODE_COMMAND; |
| j3 | 63:422be898443a | 229 | } |
| j3 | 63:422be898443a | 230 | |
| j3 | 63:422be898443a | 231 | // construct the command |
| IanBenzMaxim | 109:5c9180b4be25 | 232 | sendpacket[sendlen++] = (uint8_t)(CMD_COMM | FUNCTSEL_RESET | speed); |
| IanBenzMaxim | 74:23be10c32fa3 | 233 | |
| IanBenzMaxim | 109:5c9180b4be25 | 234 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 235 | flushCom(); |
| j3 | 63:422be898443a | 236 | |
| j3 | 63:422be898443a | 237 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 238 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 239 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 240 | { |
| j3 | 63:422be898443a | 241 | // read back the 1 byte response |
| IanBenzMaxim | 109:5c9180b4be25 | 242 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 243 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 244 | { |
| j3 | 63:422be898443a | 245 | // make sure this byte looks like a reset byte |
| IanBenzMaxim | 74:23be10c32fa3 | 246 | if (((readbuffer[0] & RB_RESET_MASK) == RB_PRESENCE) || ((readbuffer[0] & RB_RESET_MASK) == RB_ALARMPRESENCE)) |
| j3 | 63:422be898443a | 247 | { |
| j3 | 63:422be898443a | 248 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 249 | } |
| j3 | 63:422be898443a | 250 | else |
| j3 | 63:422be898443a | 251 | { |
| j3 | 63:422be898443a | 252 | result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 253 | } |
| j3 | 63:422be898443a | 254 | } |
| j3 | 63:422be898443a | 255 | } |
| j3 | 63:422be898443a | 256 | } |
| j3 | 63:422be898443a | 257 | |
| j3 | 17:b646b1e3970b | 258 | return result; |
| j3 | 3:644fc630f958 | 259 | } |
| j3 | 3:644fc630f958 | 260 | |
| IanBenzMaxim | 75:8b627804927c | 261 | OneWireMaster::CmdResult DS2480B::OWTouchBitSetLevel(uint8_t & sendRecvBit, OWLevel afterLevel) |
| j3 | 3:644fc630f958 | 262 | { |
| j3 | 23:e8e403d61359 | 263 | OneWireMaster::CmdResult result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 264 | |
| IanBenzMaxim | 74:23be10c32fa3 | 265 | uint8_t readbuffer[10], sendpacket[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 266 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 267 | |
| j3 | 63:422be898443a | 268 | // make sure normal level |
| IanBenzMaxim | 75:8b627804927c | 269 | OWSetLevel(OneWireMaster::NormalLevel); |
| j3 | 63:422be898443a | 270 | |
| j3 | 63:422be898443a | 271 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 272 | if (mode != MODSEL_COMMAND) |
| j3 | 63:422be898443a | 273 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 274 | mode = MODSEL_COMMAND; |
| j3 | 63:422be898443a | 275 | sendpacket[sendlen++] = MODE_COMMAND; |
| j3 | 63:422be898443a | 276 | } |
| j3 | 63:422be898443a | 277 | |
| j3 | 63:422be898443a | 278 | // construct the command |
| IanBenzMaxim | 75:8b627804927c | 279 | sendpacket[sendlen] = (sendRecvBit != 0) ? BITPOL_ONE : BITPOL_ZERO; |
| IanBenzMaxim | 109:5c9180b4be25 | 280 | sendpacket[sendlen++] |= CMD_COMM | FUNCTSEL_BIT | speed; |
| j3 | 63:422be898443a | 281 | |
| j3 | 63:422be898443a | 282 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 283 | flushCom(); |
| j3 | 63:422be898443a | 284 | |
| j3 | 63:422be898443a | 285 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 286 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 287 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 288 | { |
| j3 | 63:422be898443a | 289 | // read back the response |
| IanBenzMaxim | 109:5c9180b4be25 | 290 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 291 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 292 | { |
| j3 | 63:422be898443a | 293 | // interpret the response |
| j3 | 63:422be898443a | 294 | if (((readbuffer[0] & 0xE0) == 0x80) && ((readbuffer[0] & RB_BIT_MASK) == RB_BIT_ONE)) |
| j3 | 63:422be898443a | 295 | { |
| IanBenzMaxim | 75:8b627804927c | 296 | sendRecvBit = 1; |
| j3 | 63:422be898443a | 297 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 298 | } |
| j3 | 63:422be898443a | 299 | else |
| j3 | 63:422be898443a | 300 | { |
| IanBenzMaxim | 75:8b627804927c | 301 | sendRecvBit = 0; |
| j3 | 63:422be898443a | 302 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 303 | } |
| j3 | 63:422be898443a | 304 | } |
| j3 | 63:422be898443a | 305 | else |
| j3 | 63:422be898443a | 306 | { |
| j3 | 63:422be898443a | 307 | result = OneWireMaster::CommunicationReadError; |
| j3 | 63:422be898443a | 308 | } |
| j3 | 63:422be898443a | 309 | } |
| j3 | 63:422be898443a | 310 | else |
| j3 | 63:422be898443a | 311 | { |
| j3 | 63:422be898443a | 312 | result = OneWireMaster::CommunicationWriteError; |
| j3 | 63:422be898443a | 313 | } |
| j3 | 63:422be898443a | 314 | |
| IanBenzMaxim | 109:5c9180b4be25 | 315 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 316 | { |
| IanBenzMaxim | 75:8b627804927c | 317 | result = OWSetLevel(afterLevel); |
| j3 | 63:422be898443a | 318 | } |
| j3 | 63:422be898443a | 319 | |
| j3 | 17:b646b1e3970b | 320 | return result; |
| j3 | 3:644fc630f958 | 321 | } |
| j3 | 3:644fc630f958 | 322 | |
| IanBenzMaxim | 75:8b627804927c | 323 | OneWireMaster::CmdResult DS2480B::OWWriteByteSetLevel(uint8_t sendByte, OWLevel afterLevel) |
| IanBenzMaxim | 26:a361e3f42ba5 | 324 | { |
| IanBenzMaxim | 26:a361e3f42ba5 | 325 | OneWireMaster::CmdResult result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 326 | |
| IanBenzMaxim | 74:23be10c32fa3 | 327 | uint8_t readbuffer[10], sendpacket[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 328 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 329 | |
| j3 | 63:422be898443a | 330 | // make sure normal level |
| IanBenzMaxim | 75:8b627804927c | 331 | OWSetLevel(OneWireMaster::NormalLevel); |
| j3 | 63:422be898443a | 332 | |
| j3 | 63:422be898443a | 333 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 334 | if (mode != MODSEL_DATA) |
| j3 | 63:422be898443a | 335 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 336 | mode = MODSEL_DATA; |
| j3 | 63:422be898443a | 337 | sendpacket[sendlen++] = MODE_DATA; |
| j3 | 63:422be898443a | 338 | } |
| j3 | 63:422be898443a | 339 | |
| j3 | 63:422be898443a | 340 | // add the byte to send |
| IanBenzMaxim | 75:8b627804927c | 341 | sendpacket[sendlen++] = sendByte; |
| j3 | 63:422be898443a | 342 | |
| j3 | 63:422be898443a | 343 | // check for duplication of data that looks like COMMAND mode |
| IanBenzMaxim | 75:8b627804927c | 344 | if (sendByte == MODE_COMMAND) |
| j3 | 63:422be898443a | 345 | { |
| IanBenzMaxim | 75:8b627804927c | 346 | sendpacket[sendlen++] = sendByte; |
| j3 | 63:422be898443a | 347 | } |
| j3 | 63:422be898443a | 348 | |
| j3 | 63:422be898443a | 349 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 350 | flushCom(); |
| j3 | 63:422be898443a | 351 | |
| j3 | 63:422be898443a | 352 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 353 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 354 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 355 | { |
| j3 | 63:422be898443a | 356 | // read back the 1 byte response |
| IanBenzMaxim | 109:5c9180b4be25 | 357 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 75:8b627804927c | 358 | if ((result == OneWireMaster::Success) && (readbuffer[0] == sendByte)) |
| j3 | 63:422be898443a | 359 | { |
| j3 | 63:422be898443a | 360 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 361 | } |
| j3 | 63:422be898443a | 362 | else |
| j3 | 63:422be898443a | 363 | { |
| j3 | 63:422be898443a | 364 | result = OneWireMaster::CommunicationReadError; |
| j3 | 63:422be898443a | 365 | } |
| j3 | 63:422be898443a | 366 | } |
| j3 | 63:422be898443a | 367 | else |
| j3 | 63:422be898443a | 368 | { |
| j3 | 63:422be898443a | 369 | result = OneWireMaster::CommunicationWriteError; |
| j3 | 63:422be898443a | 370 | } |
| j3 | 63:422be898443a | 371 | |
| IanBenzMaxim | 109:5c9180b4be25 | 372 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 373 | { |
| IanBenzMaxim | 75:8b627804927c | 374 | result = OWSetLevel(afterLevel); |
| j3 | 63:422be898443a | 375 | } |
| j3 | 63:422be898443a | 376 | |
| IanBenzMaxim | 26:a361e3f42ba5 | 377 | return result; |
| IanBenzMaxim | 26:a361e3f42ba5 | 378 | } |
| IanBenzMaxim | 26:a361e3f42ba5 | 379 | |
| IanBenzMaxim | 75:8b627804927c | 380 | OneWireMaster::CmdResult DS2480B::OWReadByteSetLevel(uint8_t & recvByte, OWLevel afterLevel) |
| j3 | 3:644fc630f958 | 381 | { |
| j3 | 23:e8e403d61359 | 382 | OneWireMaster::CmdResult result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 383 | |
| IanBenzMaxim | 74:23be10c32fa3 | 384 | uint8_t readbuffer[10], sendpacket[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 385 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 386 | |
| j3 | 63:422be898443a | 387 | // make sure normal level |
| IanBenzMaxim | 75:8b627804927c | 388 | OWSetLevel(OneWireMaster::NormalLevel); |
| j3 | 63:422be898443a | 389 | |
| j3 | 63:422be898443a | 390 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 391 | if (mode != MODSEL_DATA) |
| j3 | 63:422be898443a | 392 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 393 | mode = MODSEL_DATA; |
| j3 | 63:422be898443a | 394 | sendpacket[sendlen++] = MODE_DATA; |
| j3 | 63:422be898443a | 395 | } |
| j3 | 63:422be898443a | 396 | |
| j3 | 63:422be898443a | 397 | // add the byte to send |
| j3 | 63:422be898443a | 398 | sendpacket[sendlen++] = 0xFF; |
| j3 | 63:422be898443a | 399 | |
| j3 | 63:422be898443a | 400 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 401 | flushCom(); |
| j3 | 63:422be898443a | 402 | |
| j3 | 63:422be898443a | 403 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 404 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 405 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 406 | { |
| j3 | 63:422be898443a | 407 | // read back the 1 byte response |
| IanBenzMaxim | 109:5c9180b4be25 | 408 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 409 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 410 | { |
| IanBenzMaxim | 75:8b627804927c | 411 | recvByte = readbuffer[0]; |
| j3 | 63:422be898443a | 412 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 413 | } |
| j3 | 63:422be898443a | 414 | else |
| j3 | 63:422be898443a | 415 | { |
| j3 | 63:422be898443a | 416 | result = OneWireMaster::CommunicationReadError; |
| j3 | 63:422be898443a | 417 | } |
| j3 | 63:422be898443a | 418 | } |
| j3 | 63:422be898443a | 419 | else |
| j3 | 63:422be898443a | 420 | { |
| j3 | 63:422be898443a | 421 | result = OneWireMaster::CommunicationWriteError; |
| j3 | 63:422be898443a | 422 | } |
| j3 | 63:422be898443a | 423 | |
| j3 | 63:422be898443a | 424 | // an error occured so re-sync with DS2480B |
| IanBenzMaxim | 109:5c9180b4be25 | 425 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 426 | { |
| IanBenzMaxim | 75:8b627804927c | 427 | result = OWSetLevel(afterLevel); |
| j3 | 63:422be898443a | 428 | } |
| j3 | 63:422be898443a | 429 | |
| j3 | 17:b646b1e3970b | 430 | return result; |
| j3 | 3:644fc630f958 | 431 | } |
| j3 | 3:644fc630f958 | 432 | |
| IanBenzMaxim | 75:8b627804927c | 433 | OneWireMaster::CmdResult DS2480B::OWSetSpeed(OWSpeed newSpeed) |
| j3 | 17:b646b1e3970b | 434 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 435 | OneWireMaster::CmdResult result = OneWireMaster::OperationFailure; |
| j3 | 96:9b7b63c0105e | 436 | |
| j3 | 96:9b7b63c0105e | 437 | uint8_t sendpacket[5]; |
| j3 | 96:9b7b63c0105e | 438 | uint8_t sendlen = 0; |
| IanBenzMaxim | 74:23be10c32fa3 | 439 | |
| j3 | 96:9b7b63c0105e | 440 | // check if change from current mode |
| IanBenzMaxim | 109:5c9180b4be25 | 441 | if (((newSpeed == OneWireMaster::OverdriveSpeed) && (speed != SPEEDSEL_OD)) || |
| IanBenzMaxim | 109:5c9180b4be25 | 442 | ((newSpeed == OneWireMaster::StandardSpeed) && (speed != SPEEDSEL_STD))) |
| j3 | 96:9b7b63c0105e | 443 | { |
| j3 | 96:9b7b63c0105e | 444 | if (newSpeed == OneWireMaster::OverdriveSpeed) |
| j3 | 96:9b7b63c0105e | 445 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 446 | result = changeBaud(Baud115200bps); |
| j3 | 96:9b7b63c0105e | 447 | if (result == OneWireMaster::Success) |
| j3 | 96:9b7b63c0105e | 448 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 449 | speed = SPEEDSEL_OD; |
| j3 | 96:9b7b63c0105e | 450 | } |
| j3 | 96:9b7b63c0105e | 451 | } |
| j3 | 96:9b7b63c0105e | 452 | else if (newSpeed == OneWireMaster::StandardSpeed) |
| j3 | 96:9b7b63c0105e | 453 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 454 | result = changeBaud(Baud9600bps); |
| j3 | 96:9b7b63c0105e | 455 | if (result == OneWireMaster::Success) |
| j3 | 96:9b7b63c0105e | 456 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 457 | speed = SPEEDSEL_STD; |
| j3 | 96:9b7b63c0105e | 458 | } |
| j3 | 96:9b7b63c0105e | 459 | } |
| j3 | 96:9b7b63c0105e | 460 | |
| j3 | 96:9b7b63c0105e | 461 | // if baud rate is set correctly then change DS2480 speed |
| j3 | 96:9b7b63c0105e | 462 | if (result == OneWireMaster::Success) |
| j3 | 96:9b7b63c0105e | 463 | { |
| j3 | 96:9b7b63c0105e | 464 | // check if correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 465 | if (mode != MODSEL_COMMAND) |
| j3 | 96:9b7b63c0105e | 466 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 467 | mode = MODSEL_COMMAND; |
| j3 | 96:9b7b63c0105e | 468 | sendpacket[sendlen++] = MODE_COMMAND; |
| j3 | 96:9b7b63c0105e | 469 | } |
| j3 | 96:9b7b63c0105e | 470 | |
| j3 | 96:9b7b63c0105e | 471 | // proceed to set the DS2480 communication speed |
| IanBenzMaxim | 109:5c9180b4be25 | 472 | sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_SEARCHOFF | speed; |
| j3 | 96:9b7b63c0105e | 473 | |
| j3 | 96:9b7b63c0105e | 474 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 475 | result = writeCom(sendlen,sendpacket); |
| j3 | 96:9b7b63c0105e | 476 | } |
| j3 | 96:9b7b63c0105e | 477 | } |
| j3 | 96:9b7b63c0105e | 478 | |
| j3 | 17:b646b1e3970b | 479 | return result; |
| j3 | 3:644fc630f958 | 480 | } |
| j3 | 3:644fc630f958 | 481 | |
| IanBenzMaxim | 75:8b627804927c | 482 | OneWireMaster::CmdResult DS2480B::OWSetLevel(OWLevel newLevel) |
| j3 | 3:644fc630f958 | 483 | { |
| j3 | 63:422be898443a | 484 | OneWireMaster::CmdResult result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 485 | |
| IanBenzMaxim | 74:23be10c32fa3 | 486 | uint8_t sendpacket[10], readbuffer[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 487 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 488 | |
| j3 | 63:422be898443a | 489 | // check if need to change level |
| IanBenzMaxim | 109:5c9180b4be25 | 490 | if (newLevel != level) |
| j3 | 63:422be898443a | 491 | { |
| j3 | 63:422be898443a | 492 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 493 | if (mode != MODSEL_COMMAND) |
| j3 | 63:422be898443a | 494 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 495 | mode = MODSEL_COMMAND; |
| j3 | 63:422be898443a | 496 | sendpacket[sendlen++] = MODE_COMMAND; |
| j3 | 63:422be898443a | 497 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 498 | |
| j3 | 63:422be898443a | 499 | // check if just putting back to normal |
| IanBenzMaxim | 75:8b627804927c | 500 | if (newLevel == OneWireMaster::NormalLevel) |
| j3 | 63:422be898443a | 501 | { |
| j3 | 63:422be898443a | 502 | // stop pulse command |
| j3 | 63:422be898443a | 503 | sendpacket[sendlen++] = MODE_STOP_PULSE; |
| j3 | 63:422be898443a | 504 | |
| j3 | 63:422be898443a | 505 | // add the command to begin the pulse WITHOUT prime |
| j3 | 63:422be898443a | 506 | sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V | PRIME5V_FALSE; |
| j3 | 63:422be898443a | 507 | |
| j3 | 63:422be898443a | 508 | // stop pulse command |
| j3 | 63:422be898443a | 509 | sendpacket[sendlen++] = MODE_STOP_PULSE; |
| IanBenzMaxim | 74:23be10c32fa3 | 510 | |
| IanBenzMaxim | 109:5c9180b4be25 | 511 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 512 | flushCom(); |
| j3 | 63:422be898443a | 513 | |
| j3 | 63:422be898443a | 514 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 515 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 516 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 517 | { |
| j3 | 63:422be898443a | 518 | // read back the 1 byte response |
| IanBenzMaxim | 109:5c9180b4be25 | 519 | result = readCom(2, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 520 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 521 | { |
| j3 | 63:422be898443a | 522 | // check response byte |
| IanBenzMaxim | 74:23be10c32fa3 | 523 | if (((readbuffer[0] & 0xE0) == 0xE0) && ((readbuffer[1] & 0xE0) == 0xE0)) |
| j3 | 63:422be898443a | 524 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 525 | level = OneWireMaster::NormalLevel; |
| j3 | 63:422be898443a | 526 | } |
| j3 | 63:422be898443a | 527 | else |
| j3 | 63:422be898443a | 528 | { |
| j3 | 63:422be898443a | 529 | result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 530 | } |
| j3 | 63:422be898443a | 531 | } |
| j3 | 63:422be898443a | 532 | } |
| j3 | 63:422be898443a | 533 | } |
| j3 | 63:422be898443a | 534 | // set new level |
| IanBenzMaxim | 74:23be10c32fa3 | 535 | else |
| j3 | 63:422be898443a | 536 | { |
| j3 | 63:422be898443a | 537 | // set the SPUD time value |
| j3 | 63:422be898443a | 538 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_5VPULSE | PARMSET_infinite; |
| j3 | 63:422be898443a | 539 | // add the command to begin the pulse |
| j3 | 63:422be898443a | 540 | sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_CHMOD | SPEEDSEL_PULSE | BITPOL_5V; |
| IanBenzMaxim | 74:23be10c32fa3 | 541 | |
| IanBenzMaxim | 109:5c9180b4be25 | 542 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 543 | flushCom(); |
| j3 | 63:422be898443a | 544 | |
| j3 | 63:422be898443a | 545 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 546 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 547 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 548 | { |
| j3 | 63:422be898443a | 549 | // read back the 1 byte response from setting time limit |
| IanBenzMaxim | 109:5c9180b4be25 | 550 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 551 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 552 | { |
| j3 | 63:422be898443a | 553 | // check response byte |
| IanBenzMaxim | 74:23be10c32fa3 | 554 | if ((readbuffer[0] & 0x81) == 0) |
| j3 | 63:422be898443a | 555 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 556 | level = newLevel; |
| j3 | 63:422be898443a | 557 | } |
| j3 | 63:422be898443a | 558 | else |
| j3 | 63:422be898443a | 559 | { |
| j3 | 63:422be898443a | 560 | result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 561 | } |
| j3 | 63:422be898443a | 562 | } |
| j3 | 63:422be898443a | 563 | } |
| j3 | 63:422be898443a | 564 | } |
| j3 | 63:422be898443a | 565 | } |
| j3 | 63:422be898443a | 566 | |
| j3 | 63:422be898443a | 567 | return result; |
| j3 | 63:422be898443a | 568 | } |
| j3 | 63:422be898443a | 569 | |
| IanBenzMaxim | 109:5c9180b4be25 | 570 | OneWireMaster::CmdResult DS2480B::detect() |
| j3 | 63:422be898443a | 571 | { |
| j3 | 63:422be898443a | 572 | OneWireMaster::CmdResult result; |
| j3 | 63:422be898443a | 573 | |
| IanBenzMaxim | 74:23be10c32fa3 | 574 | uint8_t sendpacket[10], readbuffer[10]; |
| IanBenzMaxim | 74:23be10c32fa3 | 575 | uint8_t sendlen = 0; |
| j3 | 63:422be898443a | 576 | |
| j3 | 63:422be898443a | 577 | // reset modes |
| IanBenzMaxim | 109:5c9180b4be25 | 578 | level = OneWireMaster::NormalLevel; |
| IanBenzMaxim | 109:5c9180b4be25 | 579 | mode = MODSEL_COMMAND; |
| IanBenzMaxim | 109:5c9180b4be25 | 580 | baud = Baud9600bps; |
| IanBenzMaxim | 109:5c9180b4be25 | 581 | speed = SPEEDSEL_FLEX; |
| j3 | 63:422be898443a | 582 | |
| j3 | 63:422be898443a | 583 | // set the baud rate to 9600 |
| IanBenzMaxim | 109:5c9180b4be25 | 584 | setComBaud(baud); |
| j3 | 63:422be898443a | 585 | |
| j3 | 63:422be898443a | 586 | // send a break to reset the DS2480B |
| IanBenzMaxim | 109:5c9180b4be25 | 587 | breakCom(); |
| j3 | 63:422be898443a | 588 | |
| j3 | 63:422be898443a | 589 | // delay to let line settle |
| j3 | 63:422be898443a | 590 | wait_ms(2); |
| IanBenzMaxim | 74:23be10c32fa3 | 591 | |
| IanBenzMaxim | 109:5c9180b4be25 | 592 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 593 | flushCom(); |
| j3 | 63:422be898443a | 594 | |
| j3 | 63:422be898443a | 595 | // send the timing byte |
| j3 | 63:422be898443a | 596 | sendpacket[0] = 0xC1; |
| IanBenzMaxim | 109:5c9180b4be25 | 597 | result = writeCom(1, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 598 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 599 | { |
| j3 | 63:422be898443a | 600 | // delay to let line settle |
| j3 | 63:422be898443a | 601 | wait_ms(2); |
| j3 | 63:422be898443a | 602 | |
| j3 | 63:422be898443a | 603 | // set the FLEX configuration parameters |
| j3 | 63:422be898443a | 604 | // default PDSRC = 1.37Vus |
| j3 | 63:422be898443a | 605 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SLEW | PARMSET_Slew1p37Vus; |
| j3 | 63:422be898443a | 606 | // default W1LT = 10us |
| j3 | 63:422be898443a | 607 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_WRITE1LOW | PARMSET_Write10us; |
| j3 | 63:422be898443a | 608 | // default DSO/WORT = 8us |
| j3 | 63:422be898443a | 609 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SAMPLEOFFSET | PARMSET_SampOff8us; |
| j3 | 63:422be898443a | 610 | |
| j3 | 63:422be898443a | 611 | // construct the command to read the baud rate (to test command block) |
| j3 | 63:422be898443a | 612 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3); |
| j3 | 63:422be898443a | 613 | |
| j3 | 63:422be898443a | 614 | // also do 1 bit operation (to test 1-Wire block) |
| IanBenzMaxim | 109:5c9180b4be25 | 615 | sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_BIT | baud | BITPOL_ONE; |
| IanBenzMaxim | 74:23be10c32fa3 | 616 | |
| IanBenzMaxim | 109:5c9180b4be25 | 617 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 618 | flushCom(); |
| j3 | 63:422be898443a | 619 | |
| j3 | 63:422be898443a | 620 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 621 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 622 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 623 | { |
| j3 | 63:422be898443a | 624 | // read back the response |
| IanBenzMaxim | 109:5c9180b4be25 | 625 | result = readCom(5, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 626 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 627 | { |
| j3 | 63:422be898443a | 628 | // look at the baud rate and bit operation |
| j3 | 63:422be898443a | 629 | // to see if the response makes sense |
| IanBenzMaxim | 109:5c9180b4be25 | 630 | if (((readbuffer[3] & 0xF1) == 0x00) && ((readbuffer[3] & 0x0E) == baud) && ((readbuffer[4] & 0xF0) == 0x90) && ((readbuffer[4] & 0x0C) == baud)) |
| j3 | 63:422be898443a | 631 | { |
| j3 | 63:422be898443a | 632 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 633 | } |
| j3 | 63:422be898443a | 634 | else |
| j3 | 63:422be898443a | 635 | { |
| j3 | 63:422be898443a | 636 | result = OneWireMaster::OperationFailure; |
| j3 | 63:422be898443a | 637 | } |
| j3 | 63:422be898443a | 638 | } |
| j3 | 63:422be898443a | 639 | } |
| j3 | 63:422be898443a | 640 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 641 | |
| j3 | 63:422be898443a | 642 | return result; |
| j3 | 63:422be898443a | 643 | } |
| j3 | 63:422be898443a | 644 | |
| IanBenzMaxim | 109:5c9180b4be25 | 645 | OneWireMaster::CmdResult DS2480B::changeBaud(BaudRate newBaud) |
| j3 | 63:422be898443a | 646 | { |
| j3 | 65:a28ac52ca127 | 647 | OneWireMaster::CmdResult result = OneWireMaster::Success; |
| j3 | 65:a28ac52ca127 | 648 | |
| IanBenzMaxim | 74:23be10c32fa3 | 649 | uint8_t readbuffer[5], sendpacket[5], sendpacket2[5]; |
| IanBenzMaxim | 74:23be10c32fa3 | 650 | uint8_t sendlen = 0, sendlen2 = 0; |
| j3 | 65:a28ac52ca127 | 651 | |
| j3 | 65:a28ac52ca127 | 652 | //see if diffenent then current baud rate |
| IanBenzMaxim | 109:5c9180b4be25 | 653 | if (baud != newBaud) |
| j3 | 65:a28ac52ca127 | 654 | { |
| j3 | 65:a28ac52ca127 | 655 | // build the command packet |
| j3 | 65:a28ac52ca127 | 656 | // check for correct mode |
| IanBenzMaxim | 109:5c9180b4be25 | 657 | if (mode != MODSEL_COMMAND) |
| j3 | 65:a28ac52ca127 | 658 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 659 | mode = MODSEL_COMMAND; |
| j3 | 65:a28ac52ca127 | 660 | sendpacket[sendlen++] = MODE_COMMAND; |
| j3 | 65:a28ac52ca127 | 661 | } |
| j3 | 65:a28ac52ca127 | 662 | // build the command |
| IanBenzMaxim | 75:8b627804927c | 663 | sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_BAUDRATE | newBaud; |
| j3 | 63:422be898443a | 664 | |
| j3 | 65:a28ac52ca127 | 665 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 666 | flushCom(); |
| j3 | 65:a28ac52ca127 | 667 | |
| j3 | 65:a28ac52ca127 | 668 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 669 | result = writeCom(sendlen, sendpacket); |
| IanBenzMaxim | 74:23be10c32fa3 | 670 | if (result == OneWireMaster::Success) |
| j3 | 65:a28ac52ca127 | 671 | { |
| j3 | 65:a28ac52ca127 | 672 | // make sure buffer is flushed |
| j3 | 65:a28ac52ca127 | 673 | wait_ms(5); |
| j3 | 63:422be898443a | 674 | |
| j3 | 65:a28ac52ca127 | 675 | // change our baud rate |
| IanBenzMaxim | 109:5c9180b4be25 | 676 | setComBaud(newBaud); |
| IanBenzMaxim | 109:5c9180b4be25 | 677 | baud = newBaud; |
| j3 | 65:a28ac52ca127 | 678 | |
| j3 | 65:a28ac52ca127 | 679 | // wait for things to settle |
| j3 | 65:a28ac52ca127 | 680 | wait_ms(5); |
| j3 | 65:a28ac52ca127 | 681 | |
| j3 | 65:a28ac52ca127 | 682 | // build a command packet to read back baud rate |
| j3 | 65:a28ac52ca127 | 683 | sendpacket2[sendlen2++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3); |
| j3 | 65:a28ac52ca127 | 684 | |
| j3 | 65:a28ac52ca127 | 685 | // flush the buffers |
| IanBenzMaxim | 109:5c9180b4be25 | 686 | flushCom(); |
| j3 | 63:422be898443a | 687 | |
| j3 | 65:a28ac52ca127 | 688 | // send the packet |
| IanBenzMaxim | 109:5c9180b4be25 | 689 | result = writeCom(sendlen2, sendpacket2); |
| IanBenzMaxim | 74:23be10c32fa3 | 690 | if (result == OneWireMaster::Success) |
| j3 | 63:422be898443a | 691 | { |
| j3 | 65:a28ac52ca127 | 692 | // read back the 1 byte response |
| IanBenzMaxim | 109:5c9180b4be25 | 693 | result = readCom(1, readbuffer); |
| IanBenzMaxim | 74:23be10c32fa3 | 694 | if (result == OneWireMaster::Success) |
| j3 | 65:a28ac52ca127 | 695 | { |
| j3 | 65:a28ac52ca127 | 696 | // verify correct baud |
| IanBenzMaxim | 74:23be10c32fa3 | 697 | if ((readbuffer[0] & 0x0E) == (sendpacket[sendlen - 1] & 0x0E)) |
| j3 | 65:a28ac52ca127 | 698 | { |
| j3 | 65:a28ac52ca127 | 699 | result = OneWireMaster::Success; |
| j3 | 65:a28ac52ca127 | 700 | } |
| j3 | 65:a28ac52ca127 | 701 | else |
| j3 | 65:a28ac52ca127 | 702 | { |
| IanBenzMaxim | 74:23be10c32fa3 | 703 | result = OneWireMaster::OperationFailure; |
| j3 | 65:a28ac52ca127 | 704 | } |
| j3 | 65:a28ac52ca127 | 705 | } |
| j3 | 65:a28ac52ca127 | 706 | else |
| j3 | 65:a28ac52ca127 | 707 | { |
| j3 | 65:a28ac52ca127 | 708 | result = OneWireMaster::CommunicationReadError; |
| j3 | 65:a28ac52ca127 | 709 | } |
| j3 | 63:422be898443a | 710 | } |
| j3 | 65:a28ac52ca127 | 711 | else |
| j3 | 65:a28ac52ca127 | 712 | { |
| j3 | 65:a28ac52ca127 | 713 | result = OneWireMaster::CommunicationWriteError; |
| j3 | 65:a28ac52ca127 | 714 | } |
| j3 | 65:a28ac52ca127 | 715 | } |
| j3 | 65:a28ac52ca127 | 716 | else |
| j3 | 65:a28ac52ca127 | 717 | { |
| j3 | 65:a28ac52ca127 | 718 | result = OneWireMaster::CommunicationWriteError; |
| j3 | 65:a28ac52ca127 | 719 | } |
| j3 | 65:a28ac52ca127 | 720 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 721 | |
| IanBenzMaxim | 109:5c9180b4be25 | 722 | return result; |
| IanBenzMaxim | 109:5c9180b4be25 | 723 | } |
| IanBenzMaxim | 109:5c9180b4be25 | 724 | |
| IanBenzMaxim | 109:5c9180b4be25 | 725 | OneWireMaster::CmdResult DS2480B::writeCom(size_t outlen, uint8_t *outbuf) |
| IanBenzMaxim | 109:5c9180b4be25 | 726 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 727 | OneWireMaster::CmdResult result = OneWireMaster::OperationFailure; |
| IanBenzMaxim | 109:5c9180b4be25 | 728 | |
| IanBenzMaxim | 109:5c9180b4be25 | 729 | mbed::Timer timer; |
| IanBenzMaxim | 109:5c9180b4be25 | 730 | uint32_t timeout = calculateBitTimeout(baud) * outlen; |
| IanBenzMaxim | 109:5c9180b4be25 | 731 | uint8_t idx = 0; |
| IanBenzMaxim | 109:5c9180b4be25 | 732 | |
| IanBenzMaxim | 109:5c9180b4be25 | 733 | timer.start(); |
| IanBenzMaxim | 109:5c9180b4be25 | 734 | do |
| j3 | 65:a28ac52ca127 | 735 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 736 | while ((idx < outlen) && serial.writeable()) |
| IanBenzMaxim | 109:5c9180b4be25 | 737 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 738 | serial.putc(outbuf[idx++]); |
| IanBenzMaxim | 109:5c9180b4be25 | 739 | } |
| IanBenzMaxim | 109:5c9180b4be25 | 740 | |
| IanBenzMaxim | 109:5c9180b4be25 | 741 | } while ((idx < outlen) && (timer.read_us() < timeout)); |
| IanBenzMaxim | 109:5c9180b4be25 | 742 | |
| IanBenzMaxim | 109:5c9180b4be25 | 743 | if (idx == outlen) |
| IanBenzMaxim | 109:5c9180b4be25 | 744 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 745 | result = OneWireMaster::Success; |
| IanBenzMaxim | 109:5c9180b4be25 | 746 | } |
| IanBenzMaxim | 109:5c9180b4be25 | 747 | else |
| IanBenzMaxim | 109:5c9180b4be25 | 748 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 749 | result = OneWireMaster::TimeoutError; |
| j3 | 65:a28ac52ca127 | 750 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 751 | |
| j3 | 65:a28ac52ca127 | 752 | return result; |
| j3 | 63:422be898443a | 753 | } |
| j3 | 63:422be898443a | 754 | |
| IanBenzMaxim | 109:5c9180b4be25 | 755 | OneWireMaster::CmdResult DS2480B::readCom(size_t inlen, uint8_t *inbuf) |
| j3 | 63:422be898443a | 756 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 757 | OneWireMaster::CmdResult result; |
| IanBenzMaxim | 109:5c9180b4be25 | 758 | mbed::Timer timer; |
| IanBenzMaxim | 109:5c9180b4be25 | 759 | uint32_t num_bytes_read = 0; |
| IanBenzMaxim | 109:5c9180b4be25 | 760 | uint32_t timeout = calculateBitTimeout(baud) * inlen; |
| IanBenzMaxim | 74:23be10c32fa3 | 761 | |
| IanBenzMaxim | 109:5c9180b4be25 | 762 | timer.start(); |
| j3 | 63:422be898443a | 763 | do |
| j3 | 63:422be898443a | 764 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 765 | while ((num_bytes_read < inlen) && serial.readable()) |
| j3 | 63:422be898443a | 766 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 767 | inbuf[num_bytes_read++] = serial.getc(); |
| j3 | 63:422be898443a | 768 | } |
| IanBenzMaxim | 109:5c9180b4be25 | 769 | } while ((num_bytes_read < inlen) && (timer.read_us() < timeout)); |
| IanBenzMaxim | 109:5c9180b4be25 | 770 | timer.stop(); |
| IanBenzMaxim | 74:23be10c32fa3 | 771 | |
| IanBenzMaxim | 109:5c9180b4be25 | 772 | if (num_bytes_read == inlen) |
| j3 | 63:422be898443a | 773 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 774 | result = OneWireMaster::Success; |
| j3 | 63:422be898443a | 775 | } |
| j3 | 63:422be898443a | 776 | else |
| j3 | 63:422be898443a | 777 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 778 | result = OneWireMaster::TimeoutError; |
| j3 | 63:422be898443a | 779 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 780 | |
| j3 | 63:422be898443a | 781 | return result; |
| j3 | 63:422be898443a | 782 | } |
| j3 | 63:422be898443a | 783 | |
| IanBenzMaxim | 109:5c9180b4be25 | 784 | void DS2480B::breakCom() |
| j3 | 63:422be898443a | 785 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 786 | // Switch to lower baud rate to ensure break is longer than 2 ms. |
| IanBenzMaxim | 109:5c9180b4be25 | 787 | serial.baud(4800); |
| IanBenzMaxim | 109:5c9180b4be25 | 788 | serial.send_break(); |
| IanBenzMaxim | 109:5c9180b4be25 | 789 | setComBaud(baud); |
| j3 | 63:422be898443a | 790 | } |
| j3 | 63:422be898443a | 791 | |
| IanBenzMaxim | 109:5c9180b4be25 | 792 | void DS2480B::flushCom() |
| j3 | 63:422be898443a | 793 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 794 | // Clear receive buffer. |
| IanBenzMaxim | 109:5c9180b4be25 | 795 | while (serial.readable()) |
| j3 | 63:422be898443a | 796 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 797 | serial.getc(); |
| j3 | 63:422be898443a | 798 | } |
| IanBenzMaxim | 74:23be10c32fa3 | 799 | |
| IanBenzMaxim | 109:5c9180b4be25 | 800 | /* No apparent way to clear transmit buffer. |
| IanBenzMaxim | 109:5c9180b4be25 | 801 | * From the example in AN192 (http://pdfserv.maximintegrated.com/en/an/AN192.pdf), |
| IanBenzMaxim | 109:5c9180b4be25 | 802 | * the data shouldn't be sent, just aborted and the buffer cleaned out. |
| IanBenzMaxim | 109:5c9180b4be25 | 803 | * Below is what was used in AN192 example code using windows drivers: |
| IanBenzMaxim | 109:5c9180b4be25 | 804 | * PurgeComm(ComID, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR ); |
| IanBenzMaxim | 109:5c9180b4be25 | 805 | */ |
| j3 | 63:422be898443a | 806 | } |
| j3 | 63:422be898443a | 807 | |
| IanBenzMaxim | 109:5c9180b4be25 | 808 | void DS2480B::setComBaud(BaudRate new_baud) |
| j3 | 63:422be898443a | 809 | { |
| IanBenzMaxim | 74:23be10c32fa3 | 810 | switch (new_baud) |
| j3 | 63:422be898443a | 811 | { |
| IanBenzMaxim | 109:5c9180b4be25 | 812 | case Baud115200bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 813 | serial.baud(115200); |
| IanBenzMaxim | 74:23be10c32fa3 | 814 | break; |
| IanBenzMaxim | 74:23be10c32fa3 | 815 | |
| IanBenzMaxim | 109:5c9180b4be25 | 816 | case Baud57600bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 817 | serial.baud(57600); |
| IanBenzMaxim | 74:23be10c32fa3 | 818 | break; |
| IanBenzMaxim | 74:23be10c32fa3 | 819 | |
| IanBenzMaxim | 109:5c9180b4be25 | 820 | case Baud19200bps: |
| IanBenzMaxim | 109:5c9180b4be25 | 821 | serial.baud(19200); |
| IanBenzMaxim | 74:23be10c32fa3 | 822 | break; |
| IanBenzMaxim | 74:23be10c32fa3 | 823 | |
| IanBenzMaxim | 109:5c9180b4be25 | 824 | case Baud9600bps: |
| IanBenzMaxim | 74:23be10c32fa3 | 825 | default: |
| IanBenzMaxim | 109:5c9180b4be25 | 826 | serial.baud(9600); |
| IanBenzMaxim | 74:23be10c32fa3 | 827 | break; |
| j3 | 63:422be898443a | 828 | } |
| j3 | 63:422be898443a | 829 | } |