Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Masters/DS2465/DS2465.cpp@122:955ac6c82533, 2016-09-06 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Tue Sep 06 12:32:12 2016 -0500
- Revision:
- 122:955ac6c82533
- Parent:
- 120:200109b73e3c
- Child:
- 139:f0e0a7976846
Updated I2C result codes.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
IanBenzMaxim | 75:8b627804927c | 1 | /******************************************************************//** |
IanBenzMaxim | 75:8b627804927c | 2 | * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. |
IanBenzMaxim | 75:8b627804927c | 3 | * |
IanBenzMaxim | 75:8b627804927c | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
IanBenzMaxim | 75:8b627804927c | 5 | * copy of this software and associated documentation files (the "Software"), |
IanBenzMaxim | 75:8b627804927c | 6 | * to deal in the Software without restriction, including without limitation |
IanBenzMaxim | 75:8b627804927c | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
IanBenzMaxim | 75:8b627804927c | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
IanBenzMaxim | 75:8b627804927c | 9 | * Software is furnished to do so, subject to the following conditions: |
IanBenzMaxim | 75:8b627804927c | 10 | * |
IanBenzMaxim | 75:8b627804927c | 11 | * The above copyright notice and this permission notice shall be included |
IanBenzMaxim | 75:8b627804927c | 12 | * in all copies or substantial portions of the Software. |
IanBenzMaxim | 75:8b627804927c | 13 | * |
IanBenzMaxim | 75:8b627804927c | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
IanBenzMaxim | 75:8b627804927c | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
IanBenzMaxim | 75:8b627804927c | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
IanBenzMaxim | 75:8b627804927c | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
IanBenzMaxim | 75:8b627804927c | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
IanBenzMaxim | 75:8b627804927c | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
IanBenzMaxim | 75:8b627804927c | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
IanBenzMaxim | 75:8b627804927c | 21 | * |
IanBenzMaxim | 75:8b627804927c | 22 | * Except as contained in this notice, the name of Maxim Integrated |
IanBenzMaxim | 75:8b627804927c | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
IanBenzMaxim | 75:8b627804927c | 24 | * Products, Inc. Branding Policy. |
IanBenzMaxim | 75:8b627804927c | 25 | * |
IanBenzMaxim | 75:8b627804927c | 26 | * The mere transfer of this software does not imply any licenses |
IanBenzMaxim | 75:8b627804927c | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
IanBenzMaxim | 75:8b627804927c | 28 | * trademarks, maskwork rights, or any other form of intellectual |
IanBenzMaxim | 75:8b627804927c | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
IanBenzMaxim | 75:8b627804927c | 30 | * ownership rights. |
IanBenzMaxim | 75:8b627804927c | 31 | **********************************************************************/ |
IanBenzMaxim | 75:8b627804927c | 32 | |
j3 | 104:3f48daed532b | 33 | #include "Masters/DS2465/DS2465.h" |
IanBenzMaxim | 73:2cecc1372acc | 34 | #include "I2C.h" |
IanBenzMaxim | 73:2cecc1372acc | 35 | #include "wait_api.h" |
IanBenzMaxim | 21:00c94aeb533e | 36 | |
IanBenzMaxim | 78:0cbbac7f2016 | 37 | using namespace OneWire; |
IanBenzMaxim | 78:0cbbac7f2016 | 38 | |
IanBenzMaxim | 21:00c94aeb533e | 39 | #define I2C_WRITE 0 |
IanBenzMaxim | 21:00c94aeb533e | 40 | #define I2C_READ 1 |
IanBenzMaxim | 21:00c94aeb533e | 41 | |
IanBenzMaxim | 78:0cbbac7f2016 | 42 | /// DS2465 Commands |
IanBenzMaxim | 78:0cbbac7f2016 | 43 | enum Command |
IanBenzMaxim | 78:0cbbac7f2016 | 44 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 45 | DeviceResetCmd = 0xF0, |
IanBenzMaxim | 78:0cbbac7f2016 | 46 | WriteDeviceConfigCmd = 0xD2, |
IanBenzMaxim | 78:0cbbac7f2016 | 47 | OwResetCmd = 0xB4, |
IanBenzMaxim | 78:0cbbac7f2016 | 48 | OwWriteByteCmd = 0xA5, |
IanBenzMaxim | 78:0cbbac7f2016 | 49 | OwReadByteCmd = 0x96, |
IanBenzMaxim | 78:0cbbac7f2016 | 50 | OwSingleBitCmd = 0x87, |
IanBenzMaxim | 78:0cbbac7f2016 | 51 | OwTripletCmd = 0x78, |
IanBenzMaxim | 78:0cbbac7f2016 | 52 | OwTransmitBlockCmd = 0x69, |
IanBenzMaxim | 78:0cbbac7f2016 | 53 | OwReceiveBlockCmd = 0xE1, |
IanBenzMaxim | 78:0cbbac7f2016 | 54 | CopyScratchpadCmd = 0x5A, |
IanBenzMaxim | 78:0cbbac7f2016 | 55 | ComputeSlaveSecretCmd = 0x4B, |
IanBenzMaxim | 78:0cbbac7f2016 | 56 | ComputeSlaveAuthMacCmd = 0x3C, |
IanBenzMaxim | 78:0cbbac7f2016 | 57 | ComputeSlaveWriteMacCmd = 0x2D, |
IanBenzMaxim | 78:0cbbac7f2016 | 58 | ComputeNextMasterSecretCmd = 0x1E, |
IanBenzMaxim | 78:0cbbac7f2016 | 59 | SetProtectionCmd = 0x0F |
IanBenzMaxim | 78:0cbbac7f2016 | 60 | }; |
IanBenzMaxim | 21:00c94aeb533e | 61 | |
IanBenzMaxim | 78:0cbbac7f2016 | 62 | /// DS2465 Status Bits |
IanBenzMaxim | 78:0cbbac7f2016 | 63 | enum StatusBit |
IanBenzMaxim | 78:0cbbac7f2016 | 64 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 65 | Status_1WB = 0x01, |
IanBenzMaxim | 78:0cbbac7f2016 | 66 | Status_PPD = 0x02, |
IanBenzMaxim | 78:0cbbac7f2016 | 67 | Status_SD = 0x04, |
IanBenzMaxim | 78:0cbbac7f2016 | 68 | Status_LL = 0x08, |
IanBenzMaxim | 78:0cbbac7f2016 | 69 | Status_RST = 0x10, |
IanBenzMaxim | 78:0cbbac7f2016 | 70 | Status_SBR = 0x20, |
IanBenzMaxim | 78:0cbbac7f2016 | 71 | Status_TSB = 0x40, |
IanBenzMaxim | 78:0cbbac7f2016 | 72 | Status_DIR = 0x80 |
IanBenzMaxim | 78:0cbbac7f2016 | 73 | }; |
IanBenzMaxim | 73:2cecc1372acc | 74 | |
IanBenzMaxim | 122:955ac6c82533 | 75 | static const int I2C_WRITE_OK = 1; |
IanBenzMaxim | 21:00c94aeb533e | 76 | |
IanBenzMaxim | 73:2cecc1372acc | 77 | uint8_t DS2465::Config::readByte() const |
IanBenzMaxim | 24:8942d8478d68 | 78 | { |
IanBenzMaxim | 74:23be10c32fa3 | 79 | uint8_t config = 0; |
IanBenzMaxim | 74:23be10c32fa3 | 80 | if (get1WS()) |
IanBenzMaxim | 74:23be10c32fa3 | 81 | { |
IanBenzMaxim | 74:23be10c32fa3 | 82 | config |= 0x08; |
IanBenzMaxim | 74:23be10c32fa3 | 83 | } |
IanBenzMaxim | 74:23be10c32fa3 | 84 | if (getSPU()) |
IanBenzMaxim | 74:23be10c32fa3 | 85 | { |
IanBenzMaxim | 74:23be10c32fa3 | 86 | config |= 0x04; |
IanBenzMaxim | 74:23be10c32fa3 | 87 | } |
IanBenzMaxim | 74:23be10c32fa3 | 88 | if (getPDN()) |
IanBenzMaxim | 74:23be10c32fa3 | 89 | { |
IanBenzMaxim | 74:23be10c32fa3 | 90 | config |= 0x02; |
IanBenzMaxim | 74:23be10c32fa3 | 91 | } |
IanBenzMaxim | 74:23be10c32fa3 | 92 | if (getAPU()) |
IanBenzMaxim | 74:23be10c32fa3 | 93 | { |
IanBenzMaxim | 74:23be10c32fa3 | 94 | config |= 0x01; |
IanBenzMaxim | 74:23be10c32fa3 | 95 | } |
IanBenzMaxim | 74:23be10c32fa3 | 96 | return config; |
IanBenzMaxim | 24:8942d8478d68 | 97 | } |
IanBenzMaxim | 24:8942d8478d68 | 98 | |
IanBenzMaxim | 73:2cecc1372acc | 99 | uint8_t DS2465::Config::writeByte() const |
IanBenzMaxim | 24:8942d8478d68 | 100 | { |
IanBenzMaxim | 74:23be10c32fa3 | 101 | uint8_t config = readByte(); |
IanBenzMaxim | 74:23be10c32fa3 | 102 | return ((~config << 4) | config); |
IanBenzMaxim | 24:8942d8478d68 | 103 | } |
IanBenzMaxim | 24:8942d8478d68 | 104 | |
IanBenzMaxim | 24:8942d8478d68 | 105 | void DS2465::Config::reset() |
IanBenzMaxim | 24:8942d8478d68 | 106 | { |
IanBenzMaxim | 74:23be10c32fa3 | 107 | set1WS(false); |
IanBenzMaxim | 74:23be10c32fa3 | 108 | setSPU(false); |
IanBenzMaxim | 74:23be10c32fa3 | 109 | setPDN(false); |
IanBenzMaxim | 74:23be10c32fa3 | 110 | setAPU(true); |
IanBenzMaxim | 24:8942d8478d68 | 111 | } |
IanBenzMaxim | 24:8942d8478d68 | 112 | |
IanBenzMaxim | 73:2cecc1372acc | 113 | DS2465::DS2465(mbed::I2C & I2C_interface, uint8_t I2C_address) |
IanBenzMaxim | 74:23be10c32fa3 | 114 | : m_I2C_interface(I2C_interface), m_I2C_address(I2C_address) |
IanBenzMaxim | 21:00c94aeb533e | 115 | { |
IanBenzMaxim | 74:23be10c32fa3 | 116 | |
IanBenzMaxim | 21:00c94aeb533e | 117 | } |
IanBenzMaxim | 21:00c94aeb533e | 118 | |
IanBenzMaxim | 21:00c94aeb533e | 119 | OneWireMaster::CmdResult DS2465::OWInitMaster() |
IanBenzMaxim | 21:00c94aeb533e | 120 | { |
IanBenzMaxim | 74:23be10c32fa3 | 121 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 122 | |
IanBenzMaxim | 74:23be10c32fa3 | 123 | // reset DS2465 |
IanBenzMaxim | 74:23be10c32fa3 | 124 | result = reset(); |
IanBenzMaxim | 74:23be10c32fa3 | 125 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 126 | { |
IanBenzMaxim | 74:23be10c32fa3 | 127 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 128 | } |
IanBenzMaxim | 74:23be10c32fa3 | 129 | |
IanBenzMaxim | 74:23be10c32fa3 | 130 | // write the default configuration setup |
IanBenzMaxim | 74:23be10c32fa3 | 131 | Config defaultConfig; |
IanBenzMaxim | 74:23be10c32fa3 | 132 | result = writeConfig(defaultConfig, true); |
IanBenzMaxim | 47:307dc45952db | 133 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 134 | } |
IanBenzMaxim | 21:00c94aeb533e | 135 | |
IanBenzMaxim | 33:a4c015046956 | 136 | OneWireMaster::CmdResult DS2465::computeNextMasterSecret(bool swap, unsigned int pageNum, PageRegion region) |
IanBenzMaxim | 21:00c94aeb533e | 137 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 138 | uint8_t command[2] = { ComputeNextMasterSecretCmd, (uint8_t)(swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 139 | return writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 140 | } |
IanBenzMaxim | 21:00c94aeb533e | 141 | |
IanBenzMaxim | 33:a4c015046956 | 142 | OneWireMaster::CmdResult DS2465::computeWriteMac(bool regwrite, bool swap, unsigned int pageNum, unsigned int segmentNum) const |
IanBenzMaxim | 21:00c94aeb533e | 143 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 144 | uint8_t command[2] = { ComputeSlaveWriteMacCmd, (uint8_t)((regwrite << 7) | (swap << 6) | (pageNum << 4) | segmentNum) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 145 | return cWriteMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 146 | } |
IanBenzMaxim | 21:00c94aeb533e | 147 | |
IanBenzMaxim | 33:a4c015046956 | 148 | OneWireMaster::CmdResult DS2465::computeAuthMac(bool swap, unsigned int pageNum, PageRegion region) const |
IanBenzMaxim | 21:00c94aeb533e | 149 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 150 | uint8_t command[2] = { ComputeSlaveAuthMacCmd, (uint8_t)(swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 151 | return cWriteMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 152 | } |
IanBenzMaxim | 21:00c94aeb533e | 153 | |
IanBenzMaxim | 33:a4c015046956 | 154 | OneWireMaster::CmdResult DS2465::computeSlaveSecret(bool swap, unsigned int pageNum, PageRegion region) |
IanBenzMaxim | 21:00c94aeb533e | 155 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 156 | uint8_t command[2] = { ComputeSlaveSecretCmd, (uint8_t)(swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 157 | return writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 158 | } |
IanBenzMaxim | 21:00c94aeb533e | 159 | |
IanBenzMaxim | 73:2cecc1372acc | 160 | ISha256MacCoproc::CmdResult DS2465::setMasterSecret(const Secret & masterSecret) |
IanBenzMaxim | 21:00c94aeb533e | 161 | { |
IanBenzMaxim | 74:23be10c32fa3 | 162 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 163 | result = writeMemory(Scratchpad, masterSecret, masterSecret.length); |
IanBenzMaxim | 74:23be10c32fa3 | 164 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 165 | { |
IanBenzMaxim | 74:23be10c32fa3 | 166 | result = copyScratchpadToSecret(); |
IanBenzMaxim | 74:23be10c32fa3 | 167 | } |
IanBenzMaxim | 74:23be10c32fa3 | 168 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 169 | { |
IanBenzMaxim | 74:23be10c32fa3 | 170 | wait_ms(eepromPageWriteDelayMs); |
IanBenzMaxim | 74:23be10c32fa3 | 171 | } |
IanBenzMaxim | 74:23be10c32fa3 | 172 | return (result == OneWireMaster::Success ? ISha256MacCoproc::Success : ISha256MacCoproc::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 173 | } |
IanBenzMaxim | 21:00c94aeb533e | 174 | |
IanBenzMaxim | 73:2cecc1372acc | 175 | ISha256MacCoproc::CmdResult DS2465::computeWriteMac(const WriteMacData & writeMacData, Mac & mac) const |
IanBenzMaxim | 21:00c94aeb533e | 176 | { |
IanBenzMaxim | 74:23be10c32fa3 | 177 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 178 | // Write input data to scratchpad |
IanBenzMaxim | 74:23be10c32fa3 | 179 | result = writeScratchpad(writeMacData, writeMacData.length); |
IanBenzMaxim | 74:23be10c32fa3 | 180 | // Compute MAC |
IanBenzMaxim | 74:23be10c32fa3 | 181 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 182 | { |
IanBenzMaxim | 74:23be10c32fa3 | 183 | result = computeWriteMac(false); |
IanBenzMaxim | 74:23be10c32fa3 | 184 | } |
IanBenzMaxim | 74:23be10c32fa3 | 185 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 186 | { |
IanBenzMaxim | 74:23be10c32fa3 | 187 | wait_ms(shaComputationDelayMs); |
IanBenzMaxim | 74:23be10c32fa3 | 188 | // Read MAC from register |
IanBenzMaxim | 78:0cbbac7f2016 | 189 | result = readMemory(MacReadoutReg, mac, mac.length, true); |
IanBenzMaxim | 74:23be10c32fa3 | 190 | } |
IanBenzMaxim | 74:23be10c32fa3 | 191 | return (result == OneWireMaster::Success ? ISha256MacCoproc::Success : ISha256MacCoproc::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 192 | } |
IanBenzMaxim | 21:00c94aeb533e | 193 | |
IanBenzMaxim | 73:2cecc1372acc | 194 | ISha256MacCoproc::CmdResult DS2465::computeAuthMac(const DevicePage & devicePage, const DeviceScratchpad & challenge, const AuthMacData & authMacData, Mac & mac) const |
IanBenzMaxim | 21:00c94aeb533e | 195 | { |
IanBenzMaxim | 74:23be10c32fa3 | 196 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 197 | int addr = Scratchpad; |
IanBenzMaxim | 74:23be10c32fa3 | 198 | // Write input data to scratchpad |
IanBenzMaxim | 74:23be10c32fa3 | 199 | result = cWriteMemory(addr, devicePage, devicePage.length); |
IanBenzMaxim | 74:23be10c32fa3 | 200 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 201 | { |
IanBenzMaxim | 74:23be10c32fa3 | 202 | addr += devicePage.length; |
IanBenzMaxim | 74:23be10c32fa3 | 203 | result = cWriteMemory(addr, challenge, challenge.length); |
IanBenzMaxim | 74:23be10c32fa3 | 204 | } |
IanBenzMaxim | 74:23be10c32fa3 | 205 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 206 | { |
IanBenzMaxim | 74:23be10c32fa3 | 207 | addr += challenge.length; |
IanBenzMaxim | 74:23be10c32fa3 | 208 | result = cWriteMemory(addr, authMacData, authMacData.length); |
IanBenzMaxim | 74:23be10c32fa3 | 209 | } |
IanBenzMaxim | 74:23be10c32fa3 | 210 | // Compute MAC |
IanBenzMaxim | 74:23be10c32fa3 | 211 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 212 | { |
IanBenzMaxim | 74:23be10c32fa3 | 213 | result = computeAuthMac(); |
IanBenzMaxim | 74:23be10c32fa3 | 214 | } |
IanBenzMaxim | 74:23be10c32fa3 | 215 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 216 | { |
IanBenzMaxim | 74:23be10c32fa3 | 217 | wait_ms(shaComputationDelayMs * 2); |
IanBenzMaxim | 74:23be10c32fa3 | 218 | // Read MAC from register |
IanBenzMaxim | 78:0cbbac7f2016 | 219 | result = readMemory(MacReadoutReg, mac, mac.length, true); |
IanBenzMaxim | 74:23be10c32fa3 | 220 | } |
IanBenzMaxim | 74:23be10c32fa3 | 221 | return (result == OneWireMaster::Success ? ISha256MacCoproc::Success : ISha256MacCoproc::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 222 | } |
IanBenzMaxim | 21:00c94aeb533e | 223 | |
IanBenzMaxim | 73:2cecc1372acc | 224 | ISha256MacCoproc::CmdResult DS2465::computeSlaveSecret(const DevicePage & devicePage, const DeviceScratchpad & deviceScratchpad, const SlaveSecretData & slaveSecretData) |
IanBenzMaxim | 21:00c94aeb533e | 225 | { |
IanBenzMaxim | 74:23be10c32fa3 | 226 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 227 | int addr = Scratchpad; |
IanBenzMaxim | 74:23be10c32fa3 | 228 | // Write input data to scratchpad |
IanBenzMaxim | 74:23be10c32fa3 | 229 | result = writeMemory(addr, devicePage, devicePage.length); |
IanBenzMaxim | 74:23be10c32fa3 | 230 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 231 | { |
IanBenzMaxim | 74:23be10c32fa3 | 232 | addr += devicePage.length; |
IanBenzMaxim | 74:23be10c32fa3 | 233 | result = writeMemory(addr, deviceScratchpad, deviceScratchpad.length); |
IanBenzMaxim | 74:23be10c32fa3 | 234 | } |
IanBenzMaxim | 74:23be10c32fa3 | 235 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 236 | { |
IanBenzMaxim | 74:23be10c32fa3 | 237 | addr += deviceScratchpad.length; |
IanBenzMaxim | 74:23be10c32fa3 | 238 | result = writeMemory(addr, slaveSecretData, slaveSecretData.length); |
IanBenzMaxim | 74:23be10c32fa3 | 239 | } |
IanBenzMaxim | 74:23be10c32fa3 | 240 | // Compute secret |
IanBenzMaxim | 74:23be10c32fa3 | 241 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 242 | { |
IanBenzMaxim | 74:23be10c32fa3 | 243 | result = computeSlaveSecret(); |
IanBenzMaxim | 74:23be10c32fa3 | 244 | } |
IanBenzMaxim | 74:23be10c32fa3 | 245 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 246 | { |
IanBenzMaxim | 74:23be10c32fa3 | 247 | wait_ms(shaComputationDelayMs * 2); |
IanBenzMaxim | 74:23be10c32fa3 | 248 | } |
IanBenzMaxim | 74:23be10c32fa3 | 249 | return (result == OneWireMaster::Success ? ISha256MacCoproc::Success : ISha256MacCoproc::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 250 | } |
IanBenzMaxim | 21:00c94aeb533e | 251 | |
IanBenzMaxim | 74:23be10c32fa3 | 252 | OneWireMaster::CmdResult DS2465::copyScratchpad(bool destSecret, unsigned int pageNum, bool notFull, unsigned int segmentNum) |
IanBenzMaxim | 21:00c94aeb533e | 253 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 254 | uint8_t command[2] = { CopyScratchpadCmd, (uint8_t)(destSecret ? 0 : (0x80 | (pageNum << 4) | (notFull << 3) | segmentNum)) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 255 | return writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 256 | } |
IanBenzMaxim | 21:00c94aeb533e | 257 | |
IanBenzMaxim | 34:11fffbe98ef9 | 258 | OneWireMaster::CmdResult DS2465::configureLevel(OWLevel level) |
IanBenzMaxim | 26:a361e3f42ba5 | 259 | { |
IanBenzMaxim | 74:23be10c32fa3 | 260 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 75:8b627804927c | 261 | if (m_curConfig.getSPU() != (level == StrongLevel)) |
IanBenzMaxim | 74:23be10c32fa3 | 262 | { |
IanBenzMaxim | 74:23be10c32fa3 | 263 | Config newConfig = m_curConfig; |
IanBenzMaxim | 75:8b627804927c | 264 | newConfig.setSPU(level == StrongLevel); |
IanBenzMaxim | 74:23be10c32fa3 | 265 | result = writeConfig(newConfig, true); |
IanBenzMaxim | 74:23be10c32fa3 | 266 | } |
IanBenzMaxim | 74:23be10c32fa3 | 267 | else |
IanBenzMaxim | 74:23be10c32fa3 | 268 | { |
IanBenzMaxim | 74:23be10c32fa3 | 269 | result = OneWireMaster::Success; |
IanBenzMaxim | 74:23be10c32fa3 | 270 | } |
IanBenzMaxim | 74:23be10c32fa3 | 271 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 272 | } |
IanBenzMaxim | 21:00c94aeb533e | 273 | |
IanBenzMaxim | 75:8b627804927c | 274 | OneWireMaster::CmdResult DS2465::OWSetLevel(OWLevel newLevel) |
IanBenzMaxim | 21:00c94aeb533e | 275 | { |
IanBenzMaxim | 75:8b627804927c | 276 | if (newLevel == StrongLevel) |
IanBenzMaxim | 74:23be10c32fa3 | 277 | { |
IanBenzMaxim | 74:23be10c32fa3 | 278 | return OneWireMaster::OperationFailure; |
IanBenzMaxim | 74:23be10c32fa3 | 279 | } |
IanBenzMaxim | 74:23be10c32fa3 | 280 | |
IanBenzMaxim | 75:8b627804927c | 281 | return configureLevel(newLevel); |
IanBenzMaxim | 21:00c94aeb533e | 282 | } |
IanBenzMaxim | 21:00c94aeb533e | 283 | |
IanBenzMaxim | 75:8b627804927c | 284 | OneWireMaster::CmdResult DS2465::OWSetSpeed(OWSpeed newSpeed) |
IanBenzMaxim | 21:00c94aeb533e | 285 | { |
IanBenzMaxim | 74:23be10c32fa3 | 286 | // Requested speed is already set |
IanBenzMaxim | 75:8b627804927c | 287 | if (m_curConfig.get1WS() == (newSpeed == OverdriveSpeed)) |
IanBenzMaxim | 74:23be10c32fa3 | 288 | { |
IanBenzMaxim | 74:23be10c32fa3 | 289 | return OneWireMaster::Success; |
IanBenzMaxim | 74:23be10c32fa3 | 290 | } |
IanBenzMaxim | 21:00c94aeb533e | 291 | |
IanBenzMaxim | 74:23be10c32fa3 | 292 | // set the speed |
IanBenzMaxim | 74:23be10c32fa3 | 293 | Config newConfig = m_curConfig; |
IanBenzMaxim | 75:8b627804927c | 294 | newConfig.set1WS(newSpeed == OverdriveSpeed); |
IanBenzMaxim | 74:23be10c32fa3 | 295 | |
IanBenzMaxim | 74:23be10c32fa3 | 296 | // write the new config |
IanBenzMaxim | 74:23be10c32fa3 | 297 | return writeConfig(newConfig, true); |
IanBenzMaxim | 21:00c94aeb533e | 298 | } |
IanBenzMaxim | 21:00c94aeb533e | 299 | |
IanBenzMaxim | 75:8b627804927c | 300 | OneWireMaster::CmdResult DS2465::OWTriplet(SearchDirection & searchDirection, uint8_t & sbr, uint8_t & tsb) |
IanBenzMaxim | 21:00c94aeb533e | 301 | { |
IanBenzMaxim | 74:23be10c32fa3 | 302 | // 1-Wire Triplet (Case B) |
IanBenzMaxim | 74:23be10c32fa3 | 303 | // S AD,0 [A] 1WT [A] SS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 304 | // \--------/ |
IanBenzMaxim | 74:23be10c32fa3 | 305 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 74:23be10c32fa3 | 306 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 307 | // SS indicates byte containing search direction bit value in msbit |
IanBenzMaxim | 74:23be10c32fa3 | 308 | |
IanBenzMaxim | 74:23be10c32fa3 | 309 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 310 | uint8_t command[2] = { OwTripletCmd, (uint8_t)((searchDirection == WriteOne) ? 0x80 : 0x00) }; |
IanBenzMaxim | 78:0cbbac7f2016 | 311 | result = writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 32:bce180b544ed | 312 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 32:bce180b544ed | 313 | { |
IanBenzMaxim | 74:23be10c32fa3 | 314 | uint8_t status; |
IanBenzMaxim | 74:23be10c32fa3 | 315 | result = pollBusy(&status); |
IanBenzMaxim | 74:23be10c32fa3 | 316 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 317 | { |
IanBenzMaxim | 74:23be10c32fa3 | 318 | // check bit results in status byte |
IanBenzMaxim | 78:0cbbac7f2016 | 319 | sbr = ((status & Status_SBR) == Status_SBR); |
IanBenzMaxim | 78:0cbbac7f2016 | 320 | tsb = ((status & Status_TSB) == Status_TSB); |
IanBenzMaxim | 78:0cbbac7f2016 | 321 | searchDirection = ((status & Status_DIR) == Status_DIR) ? WriteOne : WriteZero; |
IanBenzMaxim | 74:23be10c32fa3 | 322 | } |
IanBenzMaxim | 32:bce180b544ed | 323 | } |
IanBenzMaxim | 74:23be10c32fa3 | 324 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 325 | } |
IanBenzMaxim | 21:00c94aeb533e | 326 | |
IanBenzMaxim | 75:8b627804927c | 327 | OneWireMaster::CmdResult DS2465::OWReadBlock(uint8_t *recvBuf, uint8_t recvLen) |
IanBenzMaxim | 21:00c94aeb533e | 328 | { |
IanBenzMaxim | 74:23be10c32fa3 | 329 | // 1-Wire Receive Block (Case A) |
IanBenzMaxim | 78:0cbbac7f2016 | 330 | // S AD,0 [A] CommandReg [A] 1WRF [A] PR [A] P |
IanBenzMaxim | 74:23be10c32fa3 | 331 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 332 | // PR indicates byte containing parameter |
IanBenzMaxim | 74:23be10c32fa3 | 333 | |
IanBenzMaxim | 74:23be10c32fa3 | 334 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 335 | uint8_t command[2] = { OwReceiveBlockCmd, recvLen }; |
IanBenzMaxim | 21:00c94aeb533e | 336 | |
IanBenzMaxim | 78:0cbbac7f2016 | 337 | result = writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 74:23be10c32fa3 | 338 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 339 | { |
IanBenzMaxim | 74:23be10c32fa3 | 340 | result = pollBusy(); |
IanBenzMaxim | 74:23be10c32fa3 | 341 | } |
IanBenzMaxim | 74:23be10c32fa3 | 342 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 343 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 344 | result = readMemory(Scratchpad, recvBuf, recvLen, false); |
IanBenzMaxim | 74:23be10c32fa3 | 345 | } |
IanBenzMaxim | 21:00c94aeb533e | 346 | |
IanBenzMaxim | 74:23be10c32fa3 | 347 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 348 | } |
IanBenzMaxim | 21:00c94aeb533e | 349 | |
IanBenzMaxim | 75:8b627804927c | 350 | OneWireMaster::CmdResult DS2465::OWWriteBlock(const uint8_t *sendBuf, uint8_t sendLen) |
IanBenzMaxim | 21:00c94aeb533e | 351 | { |
IanBenzMaxim | 75:8b627804927c | 352 | return OWWriteBlock(false, sendBuf, sendLen); |
IanBenzMaxim | 21:00c94aeb533e | 353 | } |
IanBenzMaxim | 21:00c94aeb533e | 354 | |
IanBenzMaxim | 47:307dc45952db | 355 | OneWireMaster::CmdResult DS2465::OWWriteBlockMac() |
IanBenzMaxim | 47:307dc45952db | 356 | { |
IanBenzMaxim | 74:23be10c32fa3 | 357 | return OWWriteBlock(true, NULL, 0); |
IanBenzMaxim | 47:307dc45952db | 358 | } |
IanBenzMaxim | 47:307dc45952db | 359 | |
IanBenzMaxim | 73:2cecc1372acc | 360 | OneWireMaster::CmdResult DS2465::OWWriteBlock(bool tx_mac, const uint8_t *tran_buf, uint8_t tran_len) |
IanBenzMaxim | 21:00c94aeb533e | 361 | { |
IanBenzMaxim | 74:23be10c32fa3 | 362 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 78:0cbbac7f2016 | 363 | uint8_t command[2] = { OwTransmitBlockCmd, (uint8_t)(tx_mac ? 0xFF : tran_len) }; |
IanBenzMaxim | 21:00c94aeb533e | 364 | |
IanBenzMaxim | 74:23be10c32fa3 | 365 | if (!tx_mac) |
IanBenzMaxim | 74:23be10c32fa3 | 366 | { |
IanBenzMaxim | 74:23be10c32fa3 | 367 | // prefill scratchpad with required data |
IanBenzMaxim | 78:0cbbac7f2016 | 368 | result = writeMemory(Scratchpad, tran_buf, tran_len); |
IanBenzMaxim | 74:23be10c32fa3 | 369 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 370 | { |
IanBenzMaxim | 74:23be10c32fa3 | 371 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 372 | } |
IanBenzMaxim | 74:23be10c32fa3 | 373 | } |
IanBenzMaxim | 21:00c94aeb533e | 374 | |
IanBenzMaxim | 74:23be10c32fa3 | 375 | // 1-Wire Transmit Block (Case A) |
IanBenzMaxim | 78:0cbbac7f2016 | 376 | // S AD,0 [A] CommandReg [A] 1WTB [A] PR [A] P |
IanBenzMaxim | 74:23be10c32fa3 | 377 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 378 | // PR indicates byte containing parameter |
IanBenzMaxim | 74:23be10c32fa3 | 379 | |
IanBenzMaxim | 78:0cbbac7f2016 | 380 | result = writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 381 | |
IanBenzMaxim | 74:23be10c32fa3 | 382 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 383 | { |
IanBenzMaxim | 74:23be10c32fa3 | 384 | result = pollBusy(); |
IanBenzMaxim | 74:23be10c32fa3 | 385 | } |
IanBenzMaxim | 74:23be10c32fa3 | 386 | |
IanBenzMaxim | 74:23be10c32fa3 | 387 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 388 | } |
IanBenzMaxim | 21:00c94aeb533e | 389 | |
IanBenzMaxim | 75:8b627804927c | 390 | OneWireMaster::CmdResult DS2465::OWReadByteSetLevel(uint8_t & recvByte, OWLevel afterLevel) |
IanBenzMaxim | 21:00c94aeb533e | 391 | { |
IanBenzMaxim | 74:23be10c32fa3 | 392 | // 1-Wire Read Bytes (Case C) |
IanBenzMaxim | 78:0cbbac7f2016 | 393 | // S AD,0 [A] CommandReg [A] 1WRB [A] Sr AD,1 [A] [Status] A [Status] A |
IanBenzMaxim | 74:23be10c32fa3 | 394 | // \--------/ |
IanBenzMaxim | 74:23be10c32fa3 | 395 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 74:23be10c32fa3 | 396 | // Sr AD,0 [A] SRP [A] E1 [A] Sr AD,1 [A] DD A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 397 | // |
IanBenzMaxim | 74:23be10c32fa3 | 398 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 399 | // DD data read |
IanBenzMaxim | 74:23be10c32fa3 | 400 | |
IanBenzMaxim | 74:23be10c32fa3 | 401 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 402 | uint8_t buf; |
IanBenzMaxim | 74:23be10c32fa3 | 403 | |
IanBenzMaxim | 75:8b627804927c | 404 | result = configureLevel(afterLevel); |
IanBenzMaxim | 74:23be10c32fa3 | 405 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 406 | { |
IanBenzMaxim | 74:23be10c32fa3 | 407 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 408 | } |
IanBenzMaxim | 74:23be10c32fa3 | 409 | |
IanBenzMaxim | 78:0cbbac7f2016 | 410 | buf = OwReadByteCmd; |
IanBenzMaxim | 78:0cbbac7f2016 | 411 | result = writeMemory(CommandReg, &buf, 1); |
IanBenzMaxim | 74:23be10c32fa3 | 412 | |
IanBenzMaxim | 74:23be10c32fa3 | 413 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 414 | { |
IanBenzMaxim | 74:23be10c32fa3 | 415 | result = pollBusy(); |
IanBenzMaxim | 74:23be10c32fa3 | 416 | } |
IanBenzMaxim | 74:23be10c32fa3 | 417 | |
IanBenzMaxim | 74:23be10c32fa3 | 418 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 419 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 420 | result = readMemory(ReadDataReg, &buf, 1); |
IanBenzMaxim | 74:23be10c32fa3 | 421 | } |
IanBenzMaxim | 74:23be10c32fa3 | 422 | |
IanBenzMaxim | 74:23be10c32fa3 | 423 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 424 | { |
IanBenzMaxim | 75:8b627804927c | 425 | recvByte = buf; |
IanBenzMaxim | 74:23be10c32fa3 | 426 | } |
IanBenzMaxim | 74:23be10c32fa3 | 427 | |
IanBenzMaxim | 26:a361e3f42ba5 | 428 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 429 | } |
IanBenzMaxim | 21:00c94aeb533e | 430 | |
IanBenzMaxim | 75:8b627804927c | 431 | OneWireMaster::CmdResult DS2465::OWWriteByteSetLevel(uint8_t sendByte, OWLevel afterLevel) |
IanBenzMaxim | 74:23be10c32fa3 | 432 | { |
IanBenzMaxim | 74:23be10c32fa3 | 433 | // 1-Wire Write Byte (Case B) |
IanBenzMaxim | 78:0cbbac7f2016 | 434 | // S AD,0 [A] CommandReg [A] 1WWB [A] DD [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 435 | // \--------/ |
IanBenzMaxim | 74:23be10c32fa3 | 436 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 74:23be10c32fa3 | 437 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 438 | // DD data to write |
IanBenzMaxim | 74:23be10c32fa3 | 439 | |
IanBenzMaxim | 74:23be10c32fa3 | 440 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 441 | |
IanBenzMaxim | 75:8b627804927c | 442 | result = configureLevel(afterLevel); |
IanBenzMaxim | 74:23be10c32fa3 | 443 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 444 | { |
IanBenzMaxim | 74:23be10c32fa3 | 445 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 446 | } |
IanBenzMaxim | 74:23be10c32fa3 | 447 | |
IanBenzMaxim | 78:0cbbac7f2016 | 448 | uint8_t command[2] = { OwWriteByteCmd, sendByte }; |
IanBenzMaxim | 74:23be10c32fa3 | 449 | |
IanBenzMaxim | 78:0cbbac7f2016 | 450 | result = writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 74:23be10c32fa3 | 451 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 452 | { |
IanBenzMaxim | 74:23be10c32fa3 | 453 | result = pollBusy(); |
IanBenzMaxim | 74:23be10c32fa3 | 454 | } |
IanBenzMaxim | 74:23be10c32fa3 | 455 | |
IanBenzMaxim | 26:a361e3f42ba5 | 456 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 457 | } |
IanBenzMaxim | 21:00c94aeb533e | 458 | |
IanBenzMaxim | 75:8b627804927c | 459 | OneWireMaster::CmdResult DS2465::OWTouchBitSetLevel(uint8_t & sendRecvBit, OWLevel afterLevel) |
IanBenzMaxim | 21:00c94aeb533e | 460 | { |
IanBenzMaxim | 74:23be10c32fa3 | 461 | // 1-Wire bit (Case B) |
IanBenzMaxim | 78:0cbbac7f2016 | 462 | // S AD,0 [A] CommandReg [A] 1WSB [A] BB [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 463 | // \--------/ |
IanBenzMaxim | 74:23be10c32fa3 | 464 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 74:23be10c32fa3 | 465 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 466 | // BB indicates byte containing bit value in msbit |
IanBenzMaxim | 74:23be10c32fa3 | 467 | |
IanBenzMaxim | 74:23be10c32fa3 | 468 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 469 | |
IanBenzMaxim | 75:8b627804927c | 470 | result = configureLevel(afterLevel); |
IanBenzMaxim | 74:23be10c32fa3 | 471 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 472 | { |
IanBenzMaxim | 74:23be10c32fa3 | 473 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 474 | } |
IanBenzMaxim | 21:00c94aeb533e | 475 | |
IanBenzMaxim | 78:0cbbac7f2016 | 476 | uint8_t command[2] = { OwSingleBitCmd, (uint8_t)(sendRecvBit ? 0x80 : 0x00) }; |
IanBenzMaxim | 74:23be10c32fa3 | 477 | uint8_t status; |
IanBenzMaxim | 74:23be10c32fa3 | 478 | |
IanBenzMaxim | 78:0cbbac7f2016 | 479 | result = writeMemory(CommandReg, command, 2); |
IanBenzMaxim | 74:23be10c32fa3 | 480 | |
IanBenzMaxim | 74:23be10c32fa3 | 481 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 482 | { |
IanBenzMaxim | 74:23be10c32fa3 | 483 | result = pollBusy(&status); |
IanBenzMaxim | 74:23be10c32fa3 | 484 | } |
IanBenzMaxim | 74:23be10c32fa3 | 485 | |
IanBenzMaxim | 74:23be10c32fa3 | 486 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 487 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 488 | sendRecvBit = (status & Status_SBR); |
IanBenzMaxim | 74:23be10c32fa3 | 489 | } |
IanBenzMaxim | 74:23be10c32fa3 | 490 | |
IanBenzMaxim | 26:a361e3f42ba5 | 491 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 492 | } |
IanBenzMaxim | 21:00c94aeb533e | 493 | |
IanBenzMaxim | 73:2cecc1372acc | 494 | OneWireMaster::CmdResult DS2465::cWriteMemory(uint8_t addr, const uint8_t * buf, size_t bufLen) const |
IanBenzMaxim | 21:00c94aeb533e | 495 | { |
IanBenzMaxim | 74:23be10c32fa3 | 496 | // Write SRAM (Case A) |
IanBenzMaxim | 74:23be10c32fa3 | 497 | // S AD,0 [A] VSA [A] DD [A] P |
IanBenzMaxim | 74:23be10c32fa3 | 498 | // \-----/ |
IanBenzMaxim | 74:23be10c32fa3 | 499 | // Repeat for each data byte |
IanBenzMaxim | 74:23be10c32fa3 | 500 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 501 | // VSA valid SRAM memory address |
IanBenzMaxim | 74:23be10c32fa3 | 502 | // DD memory data to write |
IanBenzMaxim | 74:23be10c32fa3 | 503 | |
IanBenzMaxim | 74:23be10c32fa3 | 504 | m_I2C_interface.start(); |
IanBenzMaxim | 74:23be10c32fa3 | 505 | if (m_I2C_interface.write((m_I2C_address | I2C_WRITE)) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 506 | { |
IanBenzMaxim | 21:00c94aeb533e | 507 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 508 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 509 | } |
IanBenzMaxim | 74:23be10c32fa3 | 510 | if (m_I2C_interface.write(addr) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 511 | { |
IanBenzMaxim | 74:23be10c32fa3 | 512 | m_I2C_interface.stop(); |
IanBenzMaxim | 74:23be10c32fa3 | 513 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 514 | } |
IanBenzMaxim | 74:23be10c32fa3 | 515 | // loop to write each byte |
IanBenzMaxim | 120:200109b73e3c | 516 | for (size_t i = 0; i < bufLen; i++) |
IanBenzMaxim | 74:23be10c32fa3 | 517 | { |
IanBenzMaxim | 74:23be10c32fa3 | 518 | if (m_I2C_interface.write(buf[i]) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 519 | { |
IanBenzMaxim | 74:23be10c32fa3 | 520 | m_I2C_interface.stop(); |
IanBenzMaxim | 74:23be10c32fa3 | 521 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 522 | } |
IanBenzMaxim | 74:23be10c32fa3 | 523 | } |
IanBenzMaxim | 74:23be10c32fa3 | 524 | m_I2C_interface.stop(); |
IanBenzMaxim | 74:23be10c32fa3 | 525 | |
IanBenzMaxim | 74:23be10c32fa3 | 526 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 527 | } |
IanBenzMaxim | 21:00c94aeb533e | 528 | |
IanBenzMaxim | 73:2cecc1372acc | 529 | OneWireMaster::CmdResult DS2465::readMemory(uint8_t addr, uint8_t * buf, size_t bufLen, bool skipSetPointer) const |
IanBenzMaxim | 21:00c94aeb533e | 530 | { |
IanBenzMaxim | 74:23be10c32fa3 | 531 | // Read (Case A) |
IanBenzMaxim | 74:23be10c32fa3 | 532 | // S AD,0 [A] MA [A] Sr AD,1 [A] [DD] A [DD] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 533 | // \-----/ |
IanBenzMaxim | 74:23be10c32fa3 | 534 | // Repeat for each data byte, NAK last byte |
IanBenzMaxim | 74:23be10c32fa3 | 535 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 536 | // MA memory address |
IanBenzMaxim | 74:23be10c32fa3 | 537 | // DD memory data read |
IanBenzMaxim | 21:00c94aeb533e | 538 | |
IanBenzMaxim | 74:23be10c32fa3 | 539 | m_I2C_interface.start(); |
IanBenzMaxim | 74:23be10c32fa3 | 540 | if (!skipSetPointer) |
IanBenzMaxim | 74:23be10c32fa3 | 541 | { |
IanBenzMaxim | 74:23be10c32fa3 | 542 | if (m_I2C_interface.write((m_I2C_address | I2C_WRITE)) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 543 | { |
IanBenzMaxim | 74:23be10c32fa3 | 544 | m_I2C_interface.stop(); |
IanBenzMaxim | 74:23be10c32fa3 | 545 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 546 | } |
IanBenzMaxim | 74:23be10c32fa3 | 547 | if (m_I2C_interface.write(addr) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 548 | { |
IanBenzMaxim | 74:23be10c32fa3 | 549 | m_I2C_interface.stop(); |
IanBenzMaxim | 74:23be10c32fa3 | 550 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 551 | } |
IanBenzMaxim | 74:23be10c32fa3 | 552 | m_I2C_interface.start(); |
IanBenzMaxim | 74:23be10c32fa3 | 553 | } |
IanBenzMaxim | 21:00c94aeb533e | 554 | |
IanBenzMaxim | 74:23be10c32fa3 | 555 | if (m_I2C_interface.write((m_I2C_address | I2C_READ)) != I2C_WRITE_OK) |
IanBenzMaxim | 74:23be10c32fa3 | 556 | { |
IanBenzMaxim | 47:307dc45952db | 557 | m_I2C_interface.stop(); |
IanBenzMaxim | 47:307dc45952db | 558 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 74:23be10c32fa3 | 559 | } |
IanBenzMaxim | 74:23be10c32fa3 | 560 | // loop to read each byte, NAK last byte |
IanBenzMaxim | 120:200109b73e3c | 561 | for (size_t i = 0; i < bufLen; i++) |
IanBenzMaxim | 74:23be10c32fa3 | 562 | { |
IanBenzMaxim | 74:23be10c32fa3 | 563 | buf[i] = m_I2C_interface.read((i == (bufLen - 1)) ? mbed::I2C::NoACK : mbed::I2C::ACK); |
IanBenzMaxim | 74:23be10c32fa3 | 564 | } |
IanBenzMaxim | 74:23be10c32fa3 | 565 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 566 | |
IanBenzMaxim | 74:23be10c32fa3 | 567 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 568 | } |
IanBenzMaxim | 21:00c94aeb533e | 569 | |
IanBenzMaxim | 34:11fffbe98ef9 | 570 | OneWireMaster::CmdResult DS2465::writeConfig(const Config & config, bool verify) |
IanBenzMaxim | 21:00c94aeb533e | 571 | { |
IanBenzMaxim | 74:23be10c32fa3 | 572 | uint8_t configBuf; |
IanBenzMaxim | 74:23be10c32fa3 | 573 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 574 | |
IanBenzMaxim | 74:23be10c32fa3 | 575 | configBuf = config.writeByte(); |
IanBenzMaxim | 78:0cbbac7f2016 | 576 | result = writeMemory(ConfigReg, &configBuf, 1); |
IanBenzMaxim | 74:23be10c32fa3 | 577 | if (verify) |
IanBenzMaxim | 74:23be10c32fa3 | 578 | { |
IanBenzMaxim | 74:23be10c32fa3 | 579 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 580 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 581 | result = readMemory(ConfigReg, &configBuf, 1); |
IanBenzMaxim | 74:23be10c32fa3 | 582 | } |
IanBenzMaxim | 74:23be10c32fa3 | 583 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 584 | { |
IanBenzMaxim | 74:23be10c32fa3 | 585 | if (configBuf != config.readByte()) |
IanBenzMaxim | 74:23be10c32fa3 | 586 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 74:23be10c32fa3 | 587 | } |
IanBenzMaxim | 74:23be10c32fa3 | 588 | } |
IanBenzMaxim | 74:23be10c32fa3 | 589 | |
IanBenzMaxim | 35:5d23395628f6 | 590 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 35:5d23395628f6 | 591 | { |
IanBenzMaxim | 74:23be10c32fa3 | 592 | m_curConfig = config; |
IanBenzMaxim | 35:5d23395628f6 | 593 | } |
IanBenzMaxim | 35:5d23395628f6 | 594 | |
IanBenzMaxim | 74:23be10c32fa3 | 595 | return result; |
IanBenzMaxim | 24:8942d8478d68 | 596 | } |
IanBenzMaxim | 24:8942d8478d68 | 597 | |
IanBenzMaxim | 73:2cecc1372acc | 598 | OneWireMaster::CmdResult DS2465::pollBusy(uint8_t * pStatus) |
IanBenzMaxim | 24:8942d8478d68 | 599 | { |
IanBenzMaxim | 74:23be10c32fa3 | 600 | const unsigned int pollLimit = 200; |
IanBenzMaxim | 74:23be10c32fa3 | 601 | |
IanBenzMaxim | 74:23be10c32fa3 | 602 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 603 | uint8_t status; |
IanBenzMaxim | 74:23be10c32fa3 | 604 | unsigned int pollCount = 0; |
IanBenzMaxim | 47:307dc45952db | 605 | |
IanBenzMaxim | 74:23be10c32fa3 | 606 | do |
IanBenzMaxim | 74:23be10c32fa3 | 607 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 608 | result = readMemory(StatusReg, &status, 1, true); |
IanBenzMaxim | 74:23be10c32fa3 | 609 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 610 | { |
IanBenzMaxim | 74:23be10c32fa3 | 611 | return result; |
IanBenzMaxim | 74:23be10c32fa3 | 612 | } |
IanBenzMaxim | 74:23be10c32fa3 | 613 | if (pStatus != NULL) |
IanBenzMaxim | 74:23be10c32fa3 | 614 | { |
IanBenzMaxim | 74:23be10c32fa3 | 615 | *pStatus = status; |
IanBenzMaxim | 74:23be10c32fa3 | 616 | } |
IanBenzMaxim | 74:23be10c32fa3 | 617 | if (pollCount++ >= pollLimit) |
IanBenzMaxim | 74:23be10c32fa3 | 618 | { |
IanBenzMaxim | 74:23be10c32fa3 | 619 | return OneWireMaster::TimeoutError; |
IanBenzMaxim | 74:23be10c32fa3 | 620 | } |
IanBenzMaxim | 78:0cbbac7f2016 | 621 | } while (status & Status_1WB); |
IanBenzMaxim | 24:8942d8478d68 | 622 | |
IanBenzMaxim | 74:23be10c32fa3 | 623 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 624 | } |
IanBenzMaxim | 21:00c94aeb533e | 625 | |
IanBenzMaxim | 75:8b627804927c | 626 | OneWireMaster::CmdResult DS2465::OWReset() |
IanBenzMaxim | 74:23be10c32fa3 | 627 | { |
IanBenzMaxim | 74:23be10c32fa3 | 628 | // 1-Wire reset (Case B) |
IanBenzMaxim | 78:0cbbac7f2016 | 629 | // S AD,0 [A] CommandReg [A] 1WRS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 630 | // \--------/ |
IanBenzMaxim | 74:23be10c32fa3 | 631 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 74:23be10c32fa3 | 632 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 633 | |
IanBenzMaxim | 74:23be10c32fa3 | 634 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 635 | uint8_t buf; |
IanBenzMaxim | 74:23be10c32fa3 | 636 | |
IanBenzMaxim | 78:0cbbac7f2016 | 637 | buf = OwResetCmd; |
IanBenzMaxim | 78:0cbbac7f2016 | 638 | result = writeMemory(CommandReg, &buf, 1); |
IanBenzMaxim | 21:00c94aeb533e | 639 | |
IanBenzMaxim | 74:23be10c32fa3 | 640 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 641 | { |
IanBenzMaxim | 74:23be10c32fa3 | 642 | result = pollBusy(&buf); |
IanBenzMaxim | 74:23be10c32fa3 | 643 | } |
IanBenzMaxim | 21:00c94aeb533e | 644 | |
IanBenzMaxim | 74:23be10c32fa3 | 645 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 646 | { |
IanBenzMaxim | 74:23be10c32fa3 | 647 | // check for presence detect |
IanBenzMaxim | 78:0cbbac7f2016 | 648 | if ((buf & Status_PPD) != Status_PPD) |
IanBenzMaxim | 74:23be10c32fa3 | 649 | { |
IanBenzMaxim | 74:23be10c32fa3 | 650 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 74:23be10c32fa3 | 651 | } |
IanBenzMaxim | 74:23be10c32fa3 | 652 | } |
IanBenzMaxim | 74:23be10c32fa3 | 653 | |
IanBenzMaxim | 74:23be10c32fa3 | 654 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 655 | } |
IanBenzMaxim | 21:00c94aeb533e | 656 | |
IanBenzMaxim | 75:8b627804927c | 657 | OneWireMaster::CmdResult DS2465::reset() |
IanBenzMaxim | 74:23be10c32fa3 | 658 | { |
IanBenzMaxim | 74:23be10c32fa3 | 659 | // Device Reset |
IanBenzMaxim | 78:0cbbac7f2016 | 660 | // S AD,0 [A] CommandReg [A] 1WMR [A] Sr AD,1 [A] [SS] A\ P |
IanBenzMaxim | 74:23be10c32fa3 | 661 | // [] indicates from slave |
IanBenzMaxim | 74:23be10c32fa3 | 662 | // SS status byte to read to verify state |
IanBenzMaxim | 74:23be10c32fa3 | 663 | |
IanBenzMaxim | 74:23be10c32fa3 | 664 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 74:23be10c32fa3 | 665 | uint8_t buf; |
IanBenzMaxim | 74:23be10c32fa3 | 666 | |
IanBenzMaxim | 78:0cbbac7f2016 | 667 | buf = DeviceResetCmd; |
IanBenzMaxim | 78:0cbbac7f2016 | 668 | result = writeMemory(CommandReg, &buf, 1); |
IanBenzMaxim | 24:8942d8478d68 | 669 | |
IanBenzMaxim | 74:23be10c32fa3 | 670 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 671 | { |
IanBenzMaxim | 78:0cbbac7f2016 | 672 | result = readMemory(StatusReg, &buf, 1, true); |
IanBenzMaxim | 74:23be10c32fa3 | 673 | } |
IanBenzMaxim | 21:00c94aeb533e | 674 | |
IanBenzMaxim | 74:23be10c32fa3 | 675 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 676 | { |
IanBenzMaxim | 74:23be10c32fa3 | 677 | if ((buf & 0xF7) != 0x10) |
IanBenzMaxim | 74:23be10c32fa3 | 678 | { |
IanBenzMaxim | 74:23be10c32fa3 | 679 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 74:23be10c32fa3 | 680 | } |
IanBenzMaxim | 74:23be10c32fa3 | 681 | } |
IanBenzMaxim | 74:23be10c32fa3 | 682 | |
IanBenzMaxim | 74:23be10c32fa3 | 683 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 74:23be10c32fa3 | 684 | { |
IanBenzMaxim | 74:23be10c32fa3 | 685 | OWReset(); // do a command to get 1-Wire master reset out of holding state |
IanBenzMaxim | 74:23be10c32fa3 | 686 | } |
IanBenzMaxim | 74:23be10c32fa3 | 687 | |
IanBenzMaxim | 74:23be10c32fa3 | 688 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 689 | } |