Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
OneWire_Memory/Authenticators/DS28E15_22_25/DS28E15_22_25.cpp@61:268612a10614, 2016-04-14 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Thu Apr 14 14:38:42 2016 -0500
- Revision:
- 61:268612a10614
- Parent:
- 51:a65f031e997b
- Child:
- 62:43039aeca2ab
Fixed broken CRC16 calculation during Authenticated Write Block Protection operation on DS28E15/22/25.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
IanBenzMaxim | 25:bdb1c5a53b58 | 1 | //------------Copyright (C) 2013 Maxim Integrated Products -------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 2 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 3 | // Permission is hereby granted, free of charge, to any person obtaining a |
IanBenzMaxim | 25:bdb1c5a53b58 | 4 | // copy of this software and associated documentation files (the "Software"), |
IanBenzMaxim | 25:bdb1c5a53b58 | 5 | // to deal in the Software without restriction, including without limitation |
IanBenzMaxim | 25:bdb1c5a53b58 | 6 | // the rights to use, copy, modify, merge, publish, distribute, sublicense, |
IanBenzMaxim | 25:bdb1c5a53b58 | 7 | // and/or sell copies of the Software, and to permit persons to whom the |
IanBenzMaxim | 25:bdb1c5a53b58 | 8 | // Software is furnished to do so, subject to the following conditions: |
IanBenzMaxim | 25:bdb1c5a53b58 | 9 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 10 | // The above copyright notice and this permission notice shall be included |
IanBenzMaxim | 25:bdb1c5a53b58 | 11 | // in all copies or substantial portions of the Software. |
IanBenzMaxim | 25:bdb1c5a53b58 | 12 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
IanBenzMaxim | 25:bdb1c5a53b58 | 14 | // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
IanBenzMaxim | 25:bdb1c5a53b58 | 15 | // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
IanBenzMaxim | 25:bdb1c5a53b58 | 16 | // IN NO EVENT SHALL MAXIM INTEGRATED PRODCUTS BE LIABLE FOR ANY CLAIM, DAMAGES |
IanBenzMaxim | 25:bdb1c5a53b58 | 17 | // OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
IanBenzMaxim | 25:bdb1c5a53b58 | 18 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
IanBenzMaxim | 25:bdb1c5a53b58 | 19 | // OTHER DEALINGS IN THE SOFTWARE. |
IanBenzMaxim | 25:bdb1c5a53b58 | 20 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 21 | // Except as contained in this notice, the name of Maxim Integrated Products |
IanBenzMaxim | 25:bdb1c5a53b58 | 22 | // shall not be used except as stated in the Maxim Integrated Products |
IanBenzMaxim | 25:bdb1c5a53b58 | 23 | // Branding Policy. |
IanBenzMaxim | 25:bdb1c5a53b58 | 24 | // --------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 25 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 26 | #include "DS28E15_22_25.hpp" |
IanBenzMaxim | 27:d5aaefa252f1 | 27 | #include "OneWire_Masters/OneWireMaster.h" |
IanBenzMaxim | 25:bdb1c5a53b58 | 28 | #include "mbed.h" |
IanBenzMaxim | 25:bdb1c5a53b58 | 29 | |
IanBenzMaxim | 49:36954b62f503 | 30 | /// 1-Wire device commands. |
IanBenzMaxim | 49:36954b62f503 | 31 | enum Command |
IanBenzMaxim | 49:36954b62f503 | 32 | { |
IanBenzMaxim | 49:36954b62f503 | 33 | CMD_WRITE_MEMORY = 0x55, |
IanBenzMaxim | 49:36954b62f503 | 34 | CMD_READ_MEMORY = 0xF0, |
IanBenzMaxim | 49:36954b62f503 | 35 | CMD_LOAD_LOCK_SECRET = 0x33, |
IanBenzMaxim | 49:36954b62f503 | 36 | CMD_COMPUTE_LOCK_SECRET = 0x3C, |
IanBenzMaxim | 49:36954b62f503 | 37 | CMD_READ_WRITE_SCRATCHPAD = 0x0F, |
IanBenzMaxim | 49:36954b62f503 | 38 | CMD_COMPUTE_PAGEMAC = 0xA5, |
IanBenzMaxim | 49:36954b62f503 | 39 | CMD_READ_STATUS = 0xAA, |
IanBenzMaxim | 49:36954b62f503 | 40 | CMD_WRITE_BLOCK_PROTECT = 0xC3, |
IanBenzMaxim | 49:36954b62f503 | 41 | CMD_WRITE_AUTH_MEMORY = 0x5A, |
IanBenzMaxim | 49:36954b62f503 | 42 | CMD_WRITE_AUTH_PROTECT = 0xCC, |
IanBenzMaxim | 49:36954b62f503 | 43 | }; |
IanBenzMaxim | 25:bdb1c5a53b58 | 44 | |
IanBenzMaxim | 34:11fffbe98ef9 | 45 | DS28E15_22_25::BlockProtection::BlockProtection(bool readProtection, bool writeProtection, bool eepromEmulation, bool authProtection, std::uint8_t blockNum) |
IanBenzMaxim | 34:11fffbe98ef9 | 46 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 47 | setReadProtection(readProtection); |
IanBenzMaxim | 34:11fffbe98ef9 | 48 | setWriteProtection(writeProtection); |
IanBenzMaxim | 34:11fffbe98ef9 | 49 | setEepromEmulation(eepromEmulation); |
IanBenzMaxim | 34:11fffbe98ef9 | 50 | setAuthProtection(authProtection); |
IanBenzMaxim | 34:11fffbe98ef9 | 51 | setBlockNum(blockNum); |
IanBenzMaxim | 34:11fffbe98ef9 | 52 | } |
IanBenzMaxim | 34:11fffbe98ef9 | 53 | |
IanBenzMaxim | 34:11fffbe98ef9 | 54 | void DS28E15_22_25::BlockProtection::setBlockNum(std::uint8_t blockNum) |
IanBenzMaxim | 34:11fffbe98ef9 | 55 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 56 | m_status &= ~blockNumMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 57 | m_status |= (blockNum & blockNumMask); |
IanBenzMaxim | 34:11fffbe98ef9 | 58 | } |
IanBenzMaxim | 34:11fffbe98ef9 | 59 | |
IanBenzMaxim | 34:11fffbe98ef9 | 60 | bool DS28E15_22_25::BlockProtection::noProtection() const |
IanBenzMaxim | 34:11fffbe98ef9 | 61 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 62 | return !readProtection() && !writeProtection() && !eepromEmulation() && !authProtection(); |
IanBenzMaxim | 34:11fffbe98ef9 | 63 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 64 | |
IanBenzMaxim | 34:11fffbe98ef9 | 65 | void DS28E15_22_25::BlockProtection::setReadProtection(bool readProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 66 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 67 | if (readProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 68 | m_status |= readProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 69 | else |
IanBenzMaxim | 34:11fffbe98ef9 | 70 | m_status &= ~readProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 71 | } |
IanBenzMaxim | 34:11fffbe98ef9 | 72 | |
IanBenzMaxim | 34:11fffbe98ef9 | 73 | void DS28E15_22_25::BlockProtection::setWriteProtection(bool writeProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 74 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 75 | if (writeProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 76 | m_status |= writeProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 77 | else |
IanBenzMaxim | 34:11fffbe98ef9 | 78 | m_status &= ~writeProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 79 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 80 | |
IanBenzMaxim | 34:11fffbe98ef9 | 81 | void DS28E15_22_25::BlockProtection::setEepromEmulation(bool eepromEmulation) |
IanBenzMaxim | 34:11fffbe98ef9 | 82 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 83 | if (eepromEmulation) |
IanBenzMaxim | 34:11fffbe98ef9 | 84 | m_status |= eepromEmulationMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 85 | else |
IanBenzMaxim | 34:11fffbe98ef9 | 86 | m_status &= ~eepromEmulationMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 87 | } |
IanBenzMaxim | 34:11fffbe98ef9 | 88 | |
IanBenzMaxim | 34:11fffbe98ef9 | 89 | void DS28E15_22_25::BlockProtection::setAuthProtection(bool authProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 90 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 91 | if (authProtection) |
IanBenzMaxim | 34:11fffbe98ef9 | 92 | m_status |= authProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 93 | else |
IanBenzMaxim | 34:11fffbe98ef9 | 94 | m_status &= ~authProtectionMask; |
IanBenzMaxim | 34:11fffbe98ef9 | 95 | } |
IanBenzMaxim | 34:11fffbe98ef9 | 96 | |
IanBenzMaxim | 34:11fffbe98ef9 | 97 | DS28E15_22_25::DS28E15_22_25(OneWireMaster& OW_master, bool lowVoltage) |
IanBenzMaxim | 34:11fffbe98ef9 | 98 | : lowVoltage(lowVoltage), m_OW_master(OW_master) |
IanBenzMaxim | 25:bdb1c5a53b58 | 99 | { |
IanBenzMaxim | 33:a4c015046956 | 100 | std::memset(manId, 0x00, manId.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 101 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 102 | |
IanBenzMaxim | 34:11fffbe98ef9 | 103 | DS28E15_22_25::MemoryPages DS28E15_22_25::memoryPages() |
IanBenzMaxim | 25:bdb1c5a53b58 | 104 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 105 | MemoryPages pages; |
IanBenzMaxim | 25:bdb1c5a53b58 | 106 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 107 | switch (romId.familyCode()) |
IanBenzMaxim | 25:bdb1c5a53b58 | 108 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 109 | case DS28E25_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 110 | pages = DS28E25_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 111 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 112 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 113 | case DS28E22_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 114 | pages = DS28E22_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 115 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 116 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 117 | case DS28E15_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 118 | pages = DS28E15_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 119 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 120 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 121 | default: |
IanBenzMaxim | 25:bdb1c5a53b58 | 122 | pages = UNKNOWN_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 123 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 124 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 125 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 126 | return pages; |
IanBenzMaxim | 25:bdb1c5a53b58 | 127 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 128 | |
IanBenzMaxim | 34:11fffbe98ef9 | 129 | DS28E15_22_25::ProtectionBlocks DS28E15_22_25::protectionBlocks() |
IanBenzMaxim | 25:bdb1c5a53b58 | 130 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 131 | ProtectionBlocks blocks; |
IanBenzMaxim | 25:bdb1c5a53b58 | 132 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 133 | switch (romId.familyCode()) |
IanBenzMaxim | 25:bdb1c5a53b58 | 134 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 135 | case DS28E25_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 136 | blocks = DS28E25_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 137 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 138 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 139 | case DS28E22_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 140 | blocks = DS28E22_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 141 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 142 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 143 | case DS28E15_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 144 | blocks = DS28E15_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 145 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 146 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 147 | default: |
IanBenzMaxim | 25:bdb1c5a53b58 | 148 | blocks = UNKNOWN_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 149 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 150 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 151 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 152 | return blocks; |
IanBenzMaxim | 25:bdb1c5a53b58 | 153 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 154 | |
IanBenzMaxim | 50:e967f9befbd0 | 155 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthBlockProtection(const ISha256MacCoprocessor & MacCoproc, const BlockProtection & newProtection, const BlockProtection & oldProtection) |
IanBenzMaxim | 25:bdb1c5a53b58 | 156 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 157 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 158 | int cnt = 0; |
IanBenzMaxim | 33:a4c015046956 | 159 | Mac mac; |
IanBenzMaxim | 25:bdb1c5a53b58 | 160 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 161 | buf[cnt++] = CMD_WRITE_AUTH_PROTECT; |
IanBenzMaxim | 49:36954b62f503 | 162 | buf[cnt++] = newProtection.statusByte(); |
IanBenzMaxim | 25:bdb1c5a53b58 | 163 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 164 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 165 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 166 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 167 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 168 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 169 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 170 | // read the last CRC and enable |
IanBenzMaxim | 25:bdb1c5a53b58 | 171 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 172 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 173 | // now wait for the MAC computation. |
IanBenzMaxim | 34:11fffbe98ef9 | 174 | wait_ms(shaComputationDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 175 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 176 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 177 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 178 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 179 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 180 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 181 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 182 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 183 | ISha256MacCoprocessor::CmdResult result; |
IanBenzMaxim | 49:36954b62f503 | 184 | result = computeProtectionWriteMac(MacCoproc, newProtection, oldProtection, romId, manId, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 185 | if (result != ISha256MacCoprocessor::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 186 | return OperationFailure; |
IanBenzMaxim | 33:a4c015046956 | 187 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 188 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 189 | // send the MAC |
IanBenzMaxim | 33:a4c015046956 | 190 | m_OW_master.OWWriteBlock(mac, mac.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 191 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 192 | // Read CRC and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 193 | m_OW_master.OWReadBlock(&buf[cnt], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 194 | cnt += 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 195 | |
IanBenzMaxim | 61:268612a10614 | 196 | // check CRC16 |
IanBenzMaxim | 61:268612a10614 | 197 | if (OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), OneWireMaster::calculateCRC16(mac, 0, mac.length)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 198 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 199 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 200 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 201 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 202 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 203 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 204 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 205 | // DATASHEET_CORRECTION - last bit in release is a read-zero so don't check echo of write byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 206 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 207 | |
IanBenzMaxim | 34:11fffbe98ef9 | 208 | // now wait for the programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 209 | wait_ms(eepromWriteDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 210 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 211 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 212 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 213 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 214 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 215 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 216 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 217 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 218 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 219 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 220 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 221 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 222 | |
IanBenzMaxim | 50:e967f9befbd0 | 223 | OneWireSlave::CmdResult DS28E15_22_25::writeBlockProtection(const BlockProtection & protection) |
IanBenzMaxim | 25:bdb1c5a53b58 | 224 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 225 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 226 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 227 | |
IanBenzMaxim | 50:e967f9befbd0 | 228 | buf[cnt++] = CMD_WRITE_BLOCK_PROTECT; |
IanBenzMaxim | 25:bdb1c5a53b58 | 229 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 230 | // compute parameter byte |
IanBenzMaxim | 49:36954b62f503 | 231 | buf[cnt++] = protection.statusByte(); |
IanBenzMaxim | 25:bdb1c5a53b58 | 232 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 233 | m_OW_master.OWWriteBlock(&buf[0], cnt); |
IanBenzMaxim | 25:bdb1c5a53b58 | 234 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 235 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 236 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 237 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 238 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 239 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 240 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 241 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 242 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 243 | // sent release |
IanBenzMaxim | 25:bdb1c5a53b58 | 244 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 245 | |
IanBenzMaxim | 34:11fffbe98ef9 | 246 | // now wait for the programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 247 | wait_ms(eepromWriteDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 248 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 249 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 250 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 251 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 252 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 253 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 254 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 255 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 256 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 257 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 258 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 259 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 260 | |
IanBenzMaxim | 34:11fffbe98ef9 | 261 | OneWireSlave::CmdResult DS28E15_22_25::readBlockProtection(unsigned int blockNum, BlockProtection & protection) |
IanBenzMaxim | 25:bdb1c5a53b58 | 262 | { |
IanBenzMaxim | 34:11fffbe98ef9 | 263 | std::uint8_t buf; |
IanBenzMaxim | 34:11fffbe98ef9 | 264 | CmdResult result = readStatus(false, false, blockNum, &buf); |
IanBenzMaxim | 25:bdb1c5a53b58 | 265 | if (result == Success) |
IanBenzMaxim | 49:36954b62f503 | 266 | protection.setStatusByte(buf); |
IanBenzMaxim | 25:bdb1c5a53b58 | 267 | return result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 268 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 269 | |
IanBenzMaxim | 51:a65f031e997b | 270 | template <DS28E15_22_25::ProtectionBlocks blocks> OneWireSlave::CmdResult DS28E15_22_25::readAllBlockProtection(BlockProtection (&protection)[blocks]) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 271 | { |
IanBenzMaxim | 50:e967f9befbd0 | 272 | std::uint8_t buf[blocks]; |
IanBenzMaxim | 50:e967f9befbd0 | 273 | CmdResult result = readStatus(false, true, 0, buf); |
IanBenzMaxim | 50:e967f9befbd0 | 274 | if (result == Success) |
IanBenzMaxim | 50:e967f9befbd0 | 275 | { |
IanBenzMaxim | 50:e967f9befbd0 | 276 | for (std::size_t i = 0; i < blocks; i++) |
IanBenzMaxim | 50:e967f9befbd0 | 277 | protection[i].setStatusByte(buf[i]); |
IanBenzMaxim | 50:e967f9befbd0 | 278 | } |
IanBenzMaxim | 50:e967f9befbd0 | 279 | return result; |
IanBenzMaxim | 50:e967f9befbd0 | 280 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 281 | |
IanBenzMaxim | 51:a65f031e997b | 282 | OneWireSlave::CmdResult DS28E15_22_25::readAllBlockProtection(BlockProtection (&protection)[DS28E15_BLOCKS]) const |
IanBenzMaxim | 50:e967f9befbd0 | 283 | { |
IanBenzMaxim | 50:e967f9befbd0 | 284 | return readAllBlockProtection<DS28E15_BLOCKS>(protection); |
IanBenzMaxim | 50:e967f9befbd0 | 285 | } |
IanBenzMaxim | 50:e967f9befbd0 | 286 | |
IanBenzMaxim | 51:a65f031e997b | 287 | OneWireSlave::CmdResult DS28E15_22_25::readAllBlockProtection(BlockProtection (&protection)[DS28E25_BLOCKS]) const |
IanBenzMaxim | 50:e967f9befbd0 | 288 | { |
IanBenzMaxim | 50:e967f9befbd0 | 289 | return readAllBlockProtection<DS28E25_BLOCKS>(protection); |
IanBenzMaxim | 50:e967f9befbd0 | 290 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 291 | |
IanBenzMaxim | 51:a65f031e997b | 292 | OneWireSlave::CmdResult DS28E15_22_25::readPersonality(Personality & personality) const |
IanBenzMaxim | 50:e967f9befbd0 | 293 | { |
IanBenzMaxim | 50:e967f9befbd0 | 294 | return readStatus(true, false, 0, personality.bytes); |
IanBenzMaxim | 50:e967f9befbd0 | 295 | } |
IanBenzMaxim | 50:e967f9befbd0 | 296 | |
IanBenzMaxim | 50:e967f9befbd0 | 297 | OneWireSlave::CmdResult DS28E15_22_25::readStatus(bool personality, bool allpages, unsigned int blockNum, std::uint8_t * rdbuf) const |
IanBenzMaxim | 50:e967f9befbd0 | 298 | { |
IanBenzMaxim | 50:e967f9befbd0 | 299 | const std::size_t crcLen = 4, ds28e22_25_pagesPerBlock = 2; |
IanBenzMaxim | 50:e967f9befbd0 | 300 | |
IanBenzMaxim | 50:e967f9befbd0 | 301 | std::uint8_t buf[256]; |
IanBenzMaxim | 50:e967f9befbd0 | 302 | std::size_t cnt = 0, offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 303 | |
IanBenzMaxim | 50:e967f9befbd0 | 304 | buf[cnt++] = CMD_READ_STATUS; |
IanBenzMaxim | 50:e967f9befbd0 | 305 | if (personality) |
IanBenzMaxim | 50:e967f9befbd0 | 306 | buf[cnt++] = 0xE0; |
IanBenzMaxim | 50:e967f9befbd0 | 307 | else if (allpages) |
IanBenzMaxim | 50:e967f9befbd0 | 308 | buf[cnt++] = 0; |
IanBenzMaxim | 50:e967f9befbd0 | 309 | else |
IanBenzMaxim | 50:e967f9befbd0 | 310 | { |
IanBenzMaxim | 50:e967f9befbd0 | 311 | // Convert to page number for DS28E22 and DS28E25 |
IanBenzMaxim | 50:e967f9befbd0 | 312 | buf[cnt] = blockNum; |
IanBenzMaxim | 50:e967f9befbd0 | 313 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 50:e967f9befbd0 | 314 | buf[cnt] *= ds28e22_25_pagesPerBlock; |
IanBenzMaxim | 50:e967f9befbd0 | 315 | cnt++; |
IanBenzMaxim | 50:e967f9befbd0 | 316 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 317 | |
IanBenzMaxim | 50:e967f9befbd0 | 318 | // send the command |
IanBenzMaxim | 50:e967f9befbd0 | 319 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 50:e967f9befbd0 | 320 | |
IanBenzMaxim | 50:e967f9befbd0 | 321 | offset = cnt + 2; |
IanBenzMaxim | 50:e967f9befbd0 | 322 | |
IanBenzMaxim | 50:e967f9befbd0 | 323 | // Set data length |
IanBenzMaxim | 50:e967f9befbd0 | 324 | std::size_t rdnum; |
IanBenzMaxim | 50:e967f9befbd0 | 325 | if (personality) |
IanBenzMaxim | 50:e967f9befbd0 | 326 | rdnum = 4; |
IanBenzMaxim | 50:e967f9befbd0 | 327 | else if (!allpages) |
IanBenzMaxim | 50:e967f9befbd0 | 328 | rdnum = 1; |
IanBenzMaxim | 50:e967f9befbd0 | 329 | else if ((romId.familyCode() == DS28E22_FAMILY) || (romId.familyCode() == DS28E25_FAMILY)) |
IanBenzMaxim | 50:e967f9befbd0 | 330 | rdnum = DS28E25_PAGES; // Need to read extra data on DS28E22 to get CRC16. |
IanBenzMaxim | 50:e967f9befbd0 | 331 | else // DS28E15 |
IanBenzMaxim | 50:e967f9befbd0 | 332 | rdnum = DS28E15_BLOCKS; |
IanBenzMaxim | 50:e967f9befbd0 | 333 | rdnum += crcLen; // Add in CRC length |
IanBenzMaxim | 50:e967f9befbd0 | 334 | |
IanBenzMaxim | 50:e967f9befbd0 | 335 | // Read the bytes |
IanBenzMaxim | 50:e967f9befbd0 | 336 | m_OW_master.OWReadBlock(&buf[cnt], rdnum); |
IanBenzMaxim | 50:e967f9befbd0 | 337 | cnt += rdnum; |
IanBenzMaxim | 50:e967f9befbd0 | 338 | |
IanBenzMaxim | 50:e967f9befbd0 | 339 | // check the first CRC16 |
IanBenzMaxim | 50:e967f9befbd0 | 340 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 50:e967f9befbd0 | 341 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 342 | |
IanBenzMaxim | 50:e967f9befbd0 | 343 | if (personality || allpages) |
IanBenzMaxim | 50:e967f9befbd0 | 344 | { |
IanBenzMaxim | 50:e967f9befbd0 | 345 | // check the second CRC16 |
IanBenzMaxim | 50:e967f9befbd0 | 346 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 50:e967f9befbd0 | 347 | return CommunicationError; |
IanBenzMaxim | 50:e967f9befbd0 | 348 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 349 | |
IanBenzMaxim | 50:e967f9befbd0 | 350 | // copy the data to the read buffer |
IanBenzMaxim | 50:e967f9befbd0 | 351 | rdnum -= crcLen; |
IanBenzMaxim | 50:e967f9befbd0 | 352 | if (allpages && ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY))) |
IanBenzMaxim | 50:e967f9befbd0 | 353 | { |
IanBenzMaxim | 50:e967f9befbd0 | 354 | if (romId.familyCode() == DS28E22_FAMILY) |
IanBenzMaxim | 50:e967f9befbd0 | 355 | rdnum -= (DS28E25_PAGES - DS28E22_PAGES); |
IanBenzMaxim | 50:e967f9befbd0 | 356 | |
IanBenzMaxim | 50:e967f9befbd0 | 357 | for (std::size_t i = 0; i < (rdnum / ds28e22_25_pagesPerBlock); i++) |
IanBenzMaxim | 50:e967f9befbd0 | 358 | { |
IanBenzMaxim | 50:e967f9befbd0 | 359 | rdbuf[i] = (buf[offset + (i * ds28e22_25_pagesPerBlock)] & 0xF0); // Upper nibble |
IanBenzMaxim | 50:e967f9befbd0 | 360 | rdbuf[i] |= ((buf[offset + (i * ds28e22_25_pagesPerBlock)] & 0x0F) / ds28e22_25_pagesPerBlock); // Lower nibble |
IanBenzMaxim | 50:e967f9befbd0 | 361 | } |
IanBenzMaxim | 50:e967f9befbd0 | 362 | } |
IanBenzMaxim | 50:e967f9befbd0 | 363 | else |
IanBenzMaxim | 50:e967f9befbd0 | 364 | { |
IanBenzMaxim | 50:e967f9befbd0 | 365 | std::memcpy(rdbuf, &buf[offset], rdnum); |
IanBenzMaxim | 50:e967f9befbd0 | 366 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 367 | |
IanBenzMaxim | 50:e967f9befbd0 | 368 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 369 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 370 | |
IanBenzMaxim | 49:36954b62f503 | 371 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::computeAuthMac(const ISha256MacCoprocessor & MacCoproc, const Page & pageData, unsigned int pageNum, const Scratchpad & challenge, const RomId & romId, const ManId & manId, Mac & mac) |
IanBenzMaxim | 25:bdb1c5a53b58 | 372 | { |
IanBenzMaxim | 49:36954b62f503 | 373 | ISha256MacCoprocessor::AuthMacData authMacData; |
IanBenzMaxim | 49:36954b62f503 | 374 | |
IanBenzMaxim | 49:36954b62f503 | 375 | // insert ROM number or FF |
IanBenzMaxim | 49:36954b62f503 | 376 | std::memcpy(authMacData, romId, RomId::byteLen); |
IanBenzMaxim | 49:36954b62f503 | 377 | |
IanBenzMaxim | 49:36954b62f503 | 378 | authMacData[10] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 379 | |
IanBenzMaxim | 49:36954b62f503 | 380 | authMacData[9] = manId[0]; |
IanBenzMaxim | 49:36954b62f503 | 381 | authMacData[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 382 | |
IanBenzMaxim | 49:36954b62f503 | 383 | authMacData[11] = 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 384 | |
IanBenzMaxim | 49:36954b62f503 | 385 | return MacCoproc.computeAuthMac(pageData, challenge, authMacData, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 386 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 387 | |
IanBenzMaxim | 49:36954b62f503 | 388 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::computeAuthMacAnon(const ISha256MacCoprocessor & MacCoproc, const Page & pageData, unsigned int pageNum, const Scratchpad & challenge, const ManId & manId, Mac & mac) |
IanBenzMaxim | 49:36954b62f503 | 389 | { |
IanBenzMaxim | 49:36954b62f503 | 390 | RomId romId; |
IanBenzMaxim | 49:36954b62f503 | 391 | std::memset(romId, 0xFF, RomId::byteLen); |
IanBenzMaxim | 49:36954b62f503 | 392 | return computeAuthMac(MacCoproc, pageData, pageNum, challenge, romId, manId, mac); |
IanBenzMaxim | 49:36954b62f503 | 393 | } |
IanBenzMaxim | 49:36954b62f503 | 394 | |
IanBenzMaxim | 49:36954b62f503 | 395 | OneWireSlave::CmdResult DS28E15_22_25::computeReadPageMac(unsigned int page_num, bool anon, Mac & mac) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 396 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 397 | std::uint8_t buf[256],cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 398 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 399 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 400 | buf[cnt++] = CMD_COMPUTE_PAGEMAC; |
IanBenzMaxim | 25:bdb1c5a53b58 | 401 | buf[cnt++] = ((anon) ? 0xE0 : 0x00) | page_num; |
IanBenzMaxim | 25:bdb1c5a53b58 | 402 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 403 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 404 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 405 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 406 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 407 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 408 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 409 | // read the last CRC and enable |
IanBenzMaxim | 25:bdb1c5a53b58 | 410 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 411 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 412 | // now wait for the MAC computation. |
IanBenzMaxim | 34:11fffbe98ef9 | 413 | wait_ms(shaComputationDelayMs * 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 414 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 415 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 416 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 417 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 418 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 419 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 420 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 421 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 422 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 423 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 424 | if (cs != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 425 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 426 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 427 | // read the MAC and CRC |
IanBenzMaxim | 33:a4c015046956 | 428 | m_OW_master.OWReadBlock(&buf[0], (Mac::length + 2)); |
IanBenzMaxim | 25:bdb1c5a53b58 | 429 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 430 | // check CRC16 |
IanBenzMaxim | 33:a4c015046956 | 431 | if (OneWireMaster::calculateCRC16(buf, 0, (Mac::length + 2)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 432 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 433 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 434 | // copy MAC to return buffer |
IanBenzMaxim | 33:a4c015046956 | 435 | memcpy(mac, buf, Mac::length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 436 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 437 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 438 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 439 | |
IanBenzMaxim | 34:11fffbe98ef9 | 440 | OneWireSlave::CmdResult DS28E15_22_25::computeSecret(unsigned int page_num, bool lock) |
IanBenzMaxim | 25:bdb1c5a53b58 | 441 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 442 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 443 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 444 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 445 | buf[cnt++] = CMD_COMPUTE_LOCK_SECRET; |
IanBenzMaxim | 25:bdb1c5a53b58 | 446 | buf[cnt++] = (lock) ? (0xE0 | page_num) : page_num; // lock flag |
IanBenzMaxim | 25:bdb1c5a53b58 | 447 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 448 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 449 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 450 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 451 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 452 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 453 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 454 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 455 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 456 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 457 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 458 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 459 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 460 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 461 | |
IanBenzMaxim | 34:11fffbe98ef9 | 462 | // now wait for the MAC computations and secret programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 463 | wait_ms(shaComputationDelayMs * 2 + secretEepromWriteDelayMs()); |
IanBenzMaxim | 25:bdb1c5a53b58 | 464 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 465 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 466 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 467 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 468 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 469 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 470 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 471 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 472 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 473 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 474 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 475 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 476 | |
IanBenzMaxim | 34:11fffbe98ef9 | 477 | OneWireSlave::CmdResult DS28E15_22_25::writeScratchpad(const Scratchpad & data) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 478 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 479 | std::uint8_t buf[256]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 480 | int cnt = 0, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 481 | |
IanBenzMaxim | 49:36954b62f503 | 482 | buf[cnt++] = CMD_READ_WRITE_SCRATCHPAD; |
IanBenzMaxim | 25:bdb1c5a53b58 | 483 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 484 | buf[cnt++] = 0x20; |
IanBenzMaxim | 25:bdb1c5a53b58 | 485 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 486 | buf[cnt++] = 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 487 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 488 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 489 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 490 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 491 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 492 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 493 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 494 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 495 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 496 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 497 | // add the data |
IanBenzMaxim | 33:a4c015046956 | 498 | memcpy(&buf[cnt], data, data.length); |
IanBenzMaxim | 33:a4c015046956 | 499 | cnt += data.length; |
IanBenzMaxim | 25:bdb1c5a53b58 | 500 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 501 | // Send the data |
IanBenzMaxim | 33:a4c015046956 | 502 | m_OW_master.OWWriteBlock(data, data.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 503 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 504 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 505 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 506 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 507 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 508 | // check first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 509 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 510 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 511 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 512 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 513 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 514 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 515 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 516 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 517 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 518 | |
IanBenzMaxim | 49:36954b62f503 | 519 | OneWireSlave::CmdResult DS28E15_22_25::readScratchpad(Scratchpad & data) const |
IanBenzMaxim | 49:36954b62f503 | 520 | { |
IanBenzMaxim | 49:36954b62f503 | 521 | std::uint8_t buf[256]; |
IanBenzMaxim | 49:36954b62f503 | 522 | int cnt = 0, offset; |
IanBenzMaxim | 49:36954b62f503 | 523 | |
IanBenzMaxim | 49:36954b62f503 | 524 | buf[cnt++] = CMD_READ_WRITE_SCRATCHPAD; |
IanBenzMaxim | 49:36954b62f503 | 525 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 49:36954b62f503 | 526 | buf[cnt++] = 0x2F; |
IanBenzMaxim | 49:36954b62f503 | 527 | else |
IanBenzMaxim | 49:36954b62f503 | 528 | buf[cnt++] = 0x0F; |
IanBenzMaxim | 49:36954b62f503 | 529 | |
IanBenzMaxim | 49:36954b62f503 | 530 | // Send command |
IanBenzMaxim | 49:36954b62f503 | 531 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 49:36954b62f503 | 532 | |
IanBenzMaxim | 49:36954b62f503 | 533 | // Read CRC |
IanBenzMaxim | 49:36954b62f503 | 534 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 49:36954b62f503 | 535 | cnt += 2; |
IanBenzMaxim | 49:36954b62f503 | 536 | |
IanBenzMaxim | 49:36954b62f503 | 537 | offset = cnt; |
IanBenzMaxim | 49:36954b62f503 | 538 | |
IanBenzMaxim | 49:36954b62f503 | 539 | // Receive the data |
IanBenzMaxim | 49:36954b62f503 | 540 | m_OW_master.OWReadBlock(&buf[cnt], data.length); |
IanBenzMaxim | 49:36954b62f503 | 541 | cnt += data.length; |
IanBenzMaxim | 49:36954b62f503 | 542 | |
IanBenzMaxim | 49:36954b62f503 | 543 | // Read CRC |
IanBenzMaxim | 49:36954b62f503 | 544 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 49:36954b62f503 | 545 | cnt += 2; |
IanBenzMaxim | 49:36954b62f503 | 546 | |
IanBenzMaxim | 49:36954b62f503 | 547 | // check first CRC16 |
IanBenzMaxim | 49:36954b62f503 | 548 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 49:36954b62f503 | 549 | return CommunicationError; |
IanBenzMaxim | 49:36954b62f503 | 550 | |
IanBenzMaxim | 49:36954b62f503 | 551 | // check the second CRC16 |
IanBenzMaxim | 49:36954b62f503 | 552 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 49:36954b62f503 | 553 | return CommunicationError; |
IanBenzMaxim | 49:36954b62f503 | 554 | |
IanBenzMaxim | 49:36954b62f503 | 555 | // Copy to output |
IanBenzMaxim | 49:36954b62f503 | 556 | memcpy(data, &buf[offset], data.length); |
IanBenzMaxim | 49:36954b62f503 | 557 | |
IanBenzMaxim | 49:36954b62f503 | 558 | return Success; |
IanBenzMaxim | 49:36954b62f503 | 559 | } |
IanBenzMaxim | 49:36954b62f503 | 560 | |
IanBenzMaxim | 34:11fffbe98ef9 | 561 | OneWireSlave::CmdResult DS28E15_22_25::loadSecret(bool lock) |
IanBenzMaxim | 25:bdb1c5a53b58 | 562 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 563 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 564 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 565 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 566 | buf[cnt++] = CMD_LOAD_LOCK_SECRET; |
IanBenzMaxim | 25:bdb1c5a53b58 | 567 | buf[cnt++] = (lock) ? 0xE0 : 0x00; // lock flag |
IanBenzMaxim | 25:bdb1c5a53b58 | 568 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 569 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 570 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 571 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 572 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 573 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 574 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 575 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 576 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 577 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 578 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 579 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 580 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 581 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 582 | |
IanBenzMaxim | 34:11fffbe98ef9 | 583 | // now wait for the secret programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 584 | wait_ms(secretEepromWriteDelayMs()); |
IanBenzMaxim | 25:bdb1c5a53b58 | 585 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 586 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 587 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 588 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 589 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 590 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 591 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 592 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 593 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 594 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 595 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 596 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 597 | |
IanBenzMaxim | 33:a4c015046956 | 598 | OneWireSlave::CmdResult DS28E15_22_25::readPage(unsigned int page, Page & rdbuf, bool continuing) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 599 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 600 | std::uint8_t buf[256]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 601 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 602 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 603 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 604 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 605 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 606 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 607 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 608 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 609 | buf[cnt++] = CMD_READ_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 610 | buf[cnt++] = page; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 611 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 612 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 613 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 614 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 615 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 616 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 617 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 618 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 619 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 620 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 621 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 622 | // read data and CRC16 |
IanBenzMaxim | 33:a4c015046956 | 623 | m_OW_master.OWReadBlock(&buf[cnt], (rdbuf.length + 2)); |
IanBenzMaxim | 33:a4c015046956 | 624 | cnt += 34; |
IanBenzMaxim | 25:bdb1c5a53b58 | 625 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 626 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 627 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 628 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 629 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 630 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 631 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 632 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 633 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 634 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 635 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 636 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 637 | // copy the data to the read buffer |
IanBenzMaxim | 33:a4c015046956 | 638 | memcpy(rdbuf, &buf[offset], rdbuf.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 639 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 640 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 641 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 642 | |
IanBenzMaxim | 34:11fffbe98ef9 | 643 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthSegmentMac(unsigned int pageNum, unsigned int segmentNum, const Segment & newData, const Mac & mac, bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 644 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 645 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 646 | int cnt, i, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 647 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 648 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 649 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 650 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 651 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 652 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 653 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 654 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 655 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 656 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 657 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 658 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 659 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 660 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 661 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 662 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 663 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 664 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 665 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 666 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 667 | // add the data |
IanBenzMaxim | 33:a4c015046956 | 668 | for (i = 0; i < newData.length; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 669 | buf[cnt++] = newData[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 670 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 671 | // Send data |
IanBenzMaxim | 33:a4c015046956 | 672 | m_OW_master.OWWriteBlock(newData, newData.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 673 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 674 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 675 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 676 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 677 | // read the last CRC and enable power |
IanBenzMaxim | 25:bdb1c5a53b58 | 678 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 679 | |
IanBenzMaxim | 34:11fffbe98ef9 | 680 | // now wait for the MAC computation. |
IanBenzMaxim | 34:11fffbe98ef9 | 681 | wait_ms(shaComputationDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 682 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 683 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 684 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 685 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 686 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 687 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 688 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 689 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 690 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 691 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 692 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 693 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 694 | unsigned short CRC16 = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 695 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 696 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 697 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 698 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 699 | if (continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 700 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 701 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 702 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 703 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 704 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 705 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 706 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 707 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 708 | // transmit MAC as a block |
IanBenzMaxim | 33:a4c015046956 | 709 | m_OW_master.OWWriteBlock(mac, mac.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 710 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 711 | // calculate CRC on MAC |
IanBenzMaxim | 33:a4c015046956 | 712 | CRC16 = OneWireMaster::calculateCRC16(mac, 0, mac.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 713 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 714 | // append read of CRC16 and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 715 | m_OW_master.OWReadBlock(&buf[0], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 716 | cnt = 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 717 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 718 | // ckeck CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 719 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 720 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 721 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 722 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 723 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 724 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 725 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 726 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 727 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 728 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 729 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 730 | |
IanBenzMaxim | 34:11fffbe98ef9 | 731 | // now wait for the programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 732 | wait_ms(eepromWriteDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 733 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 734 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 735 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 736 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 737 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 738 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 739 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 740 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 741 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 742 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 743 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 744 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 745 | |
IanBenzMaxim | 49:36954b62f503 | 746 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::computeSegmentWriteMac(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, unsigned int segmentNum, const Segment & newData, const Segment & oldData, const RomId & romId, const ManId & manId, Mac & mac) |
IanBenzMaxim | 25:bdb1c5a53b58 | 747 | { |
IanBenzMaxim | 33:a4c015046956 | 748 | ISha256MacCoprocessor::WriteMacData MT; |
IanBenzMaxim | 25:bdb1c5a53b58 | 749 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 750 | // insert ROM number |
IanBenzMaxim | 25:bdb1c5a53b58 | 751 | memcpy(&MT[0], romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 752 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 753 | MT[11] = segmentNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 754 | MT[10] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 755 | MT[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 756 | MT[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 757 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 758 | // insert old data |
IanBenzMaxim | 33:a4c015046956 | 759 | memcpy(&MT[12], oldData, Segment::length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 760 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 761 | // insert new data |
IanBenzMaxim | 33:a4c015046956 | 762 | memcpy(&MT[16], newData, Segment::length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 763 | |
IanBenzMaxim | 33:a4c015046956 | 764 | return MacCoproc.computeWriteMac(MT, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 765 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 766 | |
IanBenzMaxim | 49:36954b62f503 | 767 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::computeProtectionWriteMac(const ISha256MacCoprocessor & MacCoproc, const BlockProtection & newProtection, const BlockProtection & oldProtection, const RomId & romId, const ManId & manId, Mac & mac) |
IanBenzMaxim | 25:bdb1c5a53b58 | 768 | { |
IanBenzMaxim | 33:a4c015046956 | 769 | ISha256MacCoprocessor::WriteMacData MT; |
IanBenzMaxim | 25:bdb1c5a53b58 | 770 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 771 | // insert ROM number |
IanBenzMaxim | 25:bdb1c5a53b58 | 772 | std::memcpy(MT, romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 773 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 774 | // instert block and page |
IanBenzMaxim | 25:bdb1c5a53b58 | 775 | MT[11] = 0; |
IanBenzMaxim | 34:11fffbe98ef9 | 776 | MT[10] = newProtection.blockNum(); |
IanBenzMaxim | 25:bdb1c5a53b58 | 777 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 778 | MT[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 779 | MT[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 780 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 781 | // old data |
IanBenzMaxim | 34:11fffbe98ef9 | 782 | MT[12] = oldProtection.authProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 783 | MT[13] = oldProtection.eepromEmulation() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 784 | MT[14] = oldProtection.writeProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 785 | MT[15] = oldProtection.readProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 786 | // new data |
IanBenzMaxim | 34:11fffbe98ef9 | 787 | MT[16] = newProtection.authProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 788 | MT[17] = newProtection.eepromEmulation() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 789 | MT[18] = newProtection.writeProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 34:11fffbe98ef9 | 790 | MT[19] = newProtection.readProtection() ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 791 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 792 | // compute the mac |
IanBenzMaxim | 33:a4c015046956 | 793 | return MacCoproc.computeWriteMac(MT, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 794 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 795 | |
IanBenzMaxim | 33:a4c015046956 | 796 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthSegment(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, unsigned int segmentNum, const Segment & newData, const Segment & oldData, bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 797 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 798 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 799 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 800 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 801 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 802 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 803 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 804 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 805 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 806 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 807 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 808 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 809 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 810 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 811 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 812 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 813 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 814 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 815 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 816 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 817 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 818 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 819 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 820 | // add the data |
IanBenzMaxim | 33:a4c015046956 | 821 | for (size_t i = 0; i < newData.length; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 822 | buf[cnt++] = newData[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 823 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 824 | // Send data |
IanBenzMaxim | 33:a4c015046956 | 825 | m_OW_master.OWWriteBlock(newData, newData.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 826 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 827 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 828 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 829 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 830 | // read the last CRC and enable power |
IanBenzMaxim | 25:bdb1c5a53b58 | 831 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 832 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 833 | // now wait for the MAC computation. |
IanBenzMaxim | 34:11fffbe98ef9 | 834 | wait_ms(shaComputationDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 835 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 836 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 837 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 838 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 839 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 840 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 841 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 842 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 843 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 844 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 845 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 846 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 847 | unsigned short CRC16 = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 848 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 849 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 850 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 851 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 852 | if (continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 853 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 854 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 855 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 856 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 857 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 858 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 859 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 860 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 861 | // compute the mac |
IanBenzMaxim | 25:bdb1c5a53b58 | 862 | ISha256MacCoprocessor::CmdResult result; |
IanBenzMaxim | 33:a4c015046956 | 863 | Mac mac; |
IanBenzMaxim | 49:36954b62f503 | 864 | result = computeSegmentWriteMac(MacCoproc, pageNum, segmentNum, newData, oldData, romId, manId, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 865 | if (result != ISha256MacCoprocessor::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 866 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 867 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 868 | // transmit MAC as a block |
IanBenzMaxim | 33:a4c015046956 | 869 | m_OW_master.OWWriteBlock(mac, mac.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 870 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 871 | // calculate CRC on MAC |
IanBenzMaxim | 33:a4c015046956 | 872 | CRC16 = OneWireMaster::calculateCRC16(mac, 0, mac.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 873 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 874 | // append read of CRC16 and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 875 | m_OW_master.OWReadBlock(&buf[0], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 876 | cnt = 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 877 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 878 | // ckeck CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 879 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 880 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 881 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 882 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 883 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 884 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 885 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 886 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 887 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 888 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 889 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 890 | |
IanBenzMaxim | 34:11fffbe98ef9 | 891 | // now wait for the programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 892 | wait_ms(eepromWriteDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 893 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 894 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 895 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 896 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 897 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 898 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 899 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 900 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 901 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 902 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 903 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 904 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 905 | |
IanBenzMaxim | 50:e967f9befbd0 | 906 | OneWireSlave::CmdResult DS28E15_22_25::readSegment(unsigned int page, unsigned int segment, Segment & data, bool continuing) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 907 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 908 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 909 | std::uint8_t buf[2]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 910 | |
IanBenzMaxim | 50:e967f9befbd0 | 911 | if (!continuing) |
IanBenzMaxim | 50:e967f9befbd0 | 912 | { |
IanBenzMaxim | 50:e967f9befbd0 | 913 | buf[0] = CMD_READ_MEMORY; |
IanBenzMaxim | 50:e967f9befbd0 | 914 | buf[1] = (segment << 5) | page; |
IanBenzMaxim | 50:e967f9befbd0 | 915 | |
IanBenzMaxim | 50:e967f9befbd0 | 916 | // Transmit command |
IanBenzMaxim | 50:e967f9befbd0 | 917 | m_OW_master.OWWriteBlock(buf, 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 918 | |
IanBenzMaxim | 50:e967f9befbd0 | 919 | // Receive CRC |
IanBenzMaxim | 50:e967f9befbd0 | 920 | result = m_OW_master.OWReadBlock(buf, 2); |
IanBenzMaxim | 50:e967f9befbd0 | 921 | } |
IanBenzMaxim | 50:e967f9befbd0 | 922 | else if (segment == 0) |
IanBenzMaxim | 50:e967f9befbd0 | 923 | { |
IanBenzMaxim | 50:e967f9befbd0 | 924 | // Receive CRC from previous read |
IanBenzMaxim | 50:e967f9befbd0 | 925 | result = m_OW_master.OWReadBlock(buf, 2); |
IanBenzMaxim | 50:e967f9befbd0 | 926 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 927 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 928 | // Receive data |
IanBenzMaxim | 25:bdb1c5a53b58 | 929 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 33:a4c015046956 | 930 | result = m_OW_master.OWReadBlock(data, data.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 931 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 932 | return (result == OneWireMaster::Success ? OneWireSlave::Success : OneWireSlave::CommunicationError); |
IanBenzMaxim | 25:bdb1c5a53b58 | 933 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 934 | |
IanBenzMaxim | 33:a4c015046956 | 935 | OneWireSlave::CmdResult DS28E15_22_25::writeSegment(unsigned int page, unsigned int block, const Segment & data, bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 936 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 937 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 938 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 939 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 940 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 941 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 942 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 943 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 944 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 945 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 946 | buf[cnt++] = CMD_WRITE_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 947 | buf[cnt++] = (block << 5) | page; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 948 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 949 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 950 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 951 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 952 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 953 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 954 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 955 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 956 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 957 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 958 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 959 | // add the data |
IanBenzMaxim | 33:a4c015046956 | 960 | for (size_t i = 0; i < data.length; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 961 | buf[cnt++] = data[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 962 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 963 | // Send data |
IanBenzMaxim | 33:a4c015046956 | 964 | m_OW_master.OWWriteBlock(data, data.length); |
IanBenzMaxim | 25:bdb1c5a53b58 | 965 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 966 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 967 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 968 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 969 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 970 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 971 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 972 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 973 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 974 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 975 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 976 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 977 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 978 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 979 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 980 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 981 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 982 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 983 | |
IanBenzMaxim | 34:11fffbe98ef9 | 984 | // now wait for the programming. |
IanBenzMaxim | 34:11fffbe98ef9 | 985 | wait_ms(eepromWriteDelayMs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 986 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 987 | // disable strong pullup |
IanBenzMaxim | 32:bce180b544ed | 988 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 989 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 990 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 991 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 992 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 993 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 994 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 995 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 996 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 997 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 998 | |
IanBenzMaxim | 49:36954b62f503 | 999 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::computeNextSecret(ISha256MacCoprocessor & MacCoproc, const Page & bindingPage, unsigned int bindingPageNum, const Scratchpad & partialSecret, const RomId & romId, const ManId & manId) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1000 | { |
IanBenzMaxim | 33:a4c015046956 | 1001 | ISha256MacCoprocessor::SlaveSecretData slaveSecretData; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1002 | |
IanBenzMaxim | 33:a4c015046956 | 1003 | // insert ROM number |
IanBenzMaxim | 33:a4c015046956 | 1004 | std::memcpy(slaveSecretData, romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1005 | |
IanBenzMaxim | 33:a4c015046956 | 1006 | slaveSecretData[11] = 0x00; |
IanBenzMaxim | 49:36954b62f503 | 1007 | slaveSecretData[10] = bindingPageNum; |
IanBenzMaxim | 33:a4c015046956 | 1008 | slaveSecretData[9] = manId[0]; |
IanBenzMaxim | 33:a4c015046956 | 1009 | slaveSecretData[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1010 | |
IanBenzMaxim | 49:36954b62f503 | 1011 | return MacCoproc.computeSlaveSecret(bindingPage, partialSecret, slaveSecretData); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1012 | } |