1-Wire® library for mbed. Complete 1-Wire library that supports our silicon masters along with a bit-bang master on the MAX32600MBED platform with one common interface for mbed. Slave support has also been included and more slaves will be added as time permits.
Dependents: MAXREFDES131_Qt_Demo MAX32630FTHR_iButton_uSD_Logger MAX32630FTHR_DS18B20_uSD_Logger MAXREFDES130_131_Demo ... more
Superseded by MaximInterface.
OneWire_Memory/Authenticators/DS28E15_22_25/DS28E15_22_25.cpp@27:d5aaefa252f1, 2016-03-25 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Fri Mar 25 11:11:59 2016 -0500
- Revision:
- 27:d5aaefa252f1
- Parent:
- 25:bdb1c5a53b58
- Child:
- 32:bce180b544ed
Do not reconfigure DS2465 if requested speed or level is already set. Use forward declarations to speed up compilation.
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 | 25:bdb1c5a53b58 | 30 | // delay durations |
IanBenzMaxim | 25:bdb1c5a53b58 | 31 | #ifdef LOW_VOLTAGE |
IanBenzMaxim | 25:bdb1c5a53b58 | 32 | #define SHA_COMPUTATION_DELAY 4 |
IanBenzMaxim | 25:bdb1c5a53b58 | 33 | #define EEPROM_WRITE_DELAY 15 |
IanBenzMaxim | 25:bdb1c5a53b58 | 34 | #define SECRET_EEPROM_DELAY 200 |
IanBenzMaxim | 25:bdb1c5a53b58 | 35 | #else |
IanBenzMaxim | 25:bdb1c5a53b58 | 36 | #define SHA_COMPUTATION_DELAY 3 |
IanBenzMaxim | 25:bdb1c5a53b58 | 37 | #define EEPROM_WRITE_DELAY 10 |
IanBenzMaxim | 25:bdb1c5a53b58 | 38 | #define SECRET_EEPROM_DELAY 90 |
IanBenzMaxim | 25:bdb1c5a53b58 | 39 | #endif |
IanBenzMaxim | 25:bdb1c5a53b58 | 40 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 41 | // 1-Wire commands |
IanBenzMaxim | 25:bdb1c5a53b58 | 42 | #define CMD_WRITE_MEMORY 0x55 |
IanBenzMaxim | 25:bdb1c5a53b58 | 43 | #define CMD_READ_MEMORY 0xF0 |
IanBenzMaxim | 25:bdb1c5a53b58 | 44 | #define CMD_LOAD_LOCK_SECRET 0x33 |
IanBenzMaxim | 25:bdb1c5a53b58 | 45 | #define CMD_COMPUTE_LOCK_SECRET 0x3C |
IanBenzMaxim | 25:bdb1c5a53b58 | 46 | #define CMD_SELECT_SECRET 0x0F |
IanBenzMaxim | 25:bdb1c5a53b58 | 47 | #define CMD_COMPUTE_PAGEMAC 0xA5 |
IanBenzMaxim | 25:bdb1c5a53b58 | 48 | #define CMD_READ_STATUS 0xAA |
IanBenzMaxim | 25:bdb1c5a53b58 | 49 | #define CMD_WRITE_BLOCK_PROTECT 0xC3 |
IanBenzMaxim | 25:bdb1c5a53b58 | 50 | #define CMD_WRITE_AUTH_MEMORY 0x5A |
IanBenzMaxim | 25:bdb1c5a53b58 | 51 | #define CMD_WRITE_AUTH_PROTECT 0xCC |
IanBenzMaxim | 25:bdb1c5a53b58 | 52 | #define CMD_PIO_READ 0xDD |
IanBenzMaxim | 25:bdb1c5a53b58 | 53 | #define CMD_PIO_WRITE 0x96 |
IanBenzMaxim | 25:bdb1c5a53b58 | 54 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 55 | #define BLOCK_READ_PROTECT 0x80 |
IanBenzMaxim | 25:bdb1c5a53b58 | 56 | #define BLOCK_WRITE_PROTECT 0x40 |
IanBenzMaxim | 25:bdb1c5a53b58 | 57 | #define BLOCK_EPROM_PROTECT 0x20 |
IanBenzMaxim | 25:bdb1c5a53b58 | 58 | #define BLOCK_WRITE_AUTH_PROTECT 0x10 |
IanBenzMaxim | 25:bdb1c5a53b58 | 59 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 60 | #define PROT_BIT_AUTHWRITE 0x10 |
IanBenzMaxim | 25:bdb1c5a53b58 | 61 | #define PROT_BIT_EPROM 0x20 |
IanBenzMaxim | 25:bdb1c5a53b58 | 62 | #define PROT_BIT_WRITE 0x40 |
IanBenzMaxim | 25:bdb1c5a53b58 | 63 | #define PROT_BIT_READ 0x80 |
IanBenzMaxim | 25:bdb1c5a53b58 | 64 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 65 | DS28E15_22_25::DS28E15_22_25(OneWireMaster& OW_master) |
IanBenzMaxim | 25:bdb1c5a53b58 | 66 | : m_OW_master(OW_master) |
IanBenzMaxim | 25:bdb1c5a53b58 | 67 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 68 | std::memset(manId, 0x00, manIdLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 69 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 70 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 71 | DS28E15_22_25::DevicePages DS28E15_22_25::devicePages() |
IanBenzMaxim | 25:bdb1c5a53b58 | 72 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 73 | DevicePages pages; |
IanBenzMaxim | 25:bdb1c5a53b58 | 74 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 75 | switch (romId.familyCode()) |
IanBenzMaxim | 25:bdb1c5a53b58 | 76 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 77 | case DS28E25_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 78 | pages = DS28E25_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 79 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 80 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 81 | case DS28E22_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 82 | pages = DS28E22_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 83 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 84 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 85 | case DS28E15_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 86 | pages = DS28E15_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 87 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 88 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 89 | default: |
IanBenzMaxim | 25:bdb1c5a53b58 | 90 | pages = UNKNOWN_PAGES; |
IanBenzMaxim | 25:bdb1c5a53b58 | 91 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 92 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 93 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 94 | return pages; |
IanBenzMaxim | 25:bdb1c5a53b58 | 95 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 96 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 97 | DS28E15_22_25::DeviceBlocks DS28E15_22_25::deviceBlocks() |
IanBenzMaxim | 25:bdb1c5a53b58 | 98 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 99 | DeviceBlocks blocks; |
IanBenzMaxim | 25:bdb1c5a53b58 | 100 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 101 | switch (romId.familyCode()) |
IanBenzMaxim | 25:bdb1c5a53b58 | 102 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 103 | case DS28E25_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 104 | blocks = DS28E25_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 105 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 106 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 107 | case DS28E22_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 108 | blocks = DS28E22_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 109 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 110 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 111 | case DS28E15_FAMILY: |
IanBenzMaxim | 25:bdb1c5a53b58 | 112 | blocks = DS28E15_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 113 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 114 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 115 | default: |
IanBenzMaxim | 25:bdb1c5a53b58 | 116 | blocks = UNKNOWN_BLOCKS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 117 | break; |
IanBenzMaxim | 25:bdb1c5a53b58 | 118 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 119 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 120 | return blocks; |
IanBenzMaxim | 25:bdb1c5a53b58 | 121 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 122 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 123 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 124 | // Write page protection byte. |
IanBenzMaxim | 25:bdb1c5a53b58 | 125 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 126 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 127 | // block - block number (0 to 7) which covers two pages each |
IanBenzMaxim | 25:bdb1c5a53b58 | 128 | // new_value - new protection byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 129 | // old_value - old protection byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 130 | // manid - manufacturer ID |
IanBenzMaxim | 25:bdb1c5a53b58 | 131 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 132 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 133 | // Returns: true - protection written |
IanBenzMaxim | 25:bdb1c5a53b58 | 134 | // false - Failed to set protection |
IanBenzMaxim | 25:bdb1c5a53b58 | 135 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 136 | OneWireSlave::CmdResult DS28E15_22_25::WriteAuthBlockProtection(const ISha256MacCoprocessor & MacCoproc, std::uint8_t newProtection, std::uint8_t oldProtection, bool contflag) |
IanBenzMaxim | 25:bdb1c5a53b58 | 137 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 138 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 139 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 140 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 141 | buf[cnt++] = CMD_WRITE_AUTH_PROTECT; |
IanBenzMaxim | 25:bdb1c5a53b58 | 142 | buf[cnt++] = newProtection; |
IanBenzMaxim | 25:bdb1c5a53b58 | 143 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 144 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 145 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 146 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 147 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 148 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 149 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 150 | // read the last CRC and enable |
IanBenzMaxim | 25:bdb1c5a53b58 | 151 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 152 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 153 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 154 | wait_ms(SHA_COMPUTATION_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 155 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 156 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 157 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 158 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 159 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 160 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 161 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 162 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 163 | ISha256MacCoprocessor::CmdResult result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 164 | result = CalculateProtectionWriteMAC256(MacCoproc, newProtection, oldProtection, romId, manId, reinterpret_cast<std::uint8_t (&)[macLen]>(buf)); |
IanBenzMaxim | 25:bdb1c5a53b58 | 165 | if (result != ISha256MacCoprocessor::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 166 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 167 | cnt = macLen; |
IanBenzMaxim | 25:bdb1c5a53b58 | 168 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 169 | // send the MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 170 | m_OW_master.OWWriteBlock(&buf[0], macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 171 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 172 | // Read CRC and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 173 | m_OW_master.OWReadBlock(&buf[cnt], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 174 | cnt += 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 175 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 176 | // ckeck CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 177 | if (OneWireMaster::calculateCRC16(buf, 0, (cnt - 1)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 178 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 179 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 180 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 181 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 182 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 183 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 184 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 185 | // DATASHEET_CORRECTION - last bit in release is a read-zero so don't check echo of write byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 186 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 187 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 188 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 189 | wait_ms(EEPROM_WRITE_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 190 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 191 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 192 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 193 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 194 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 195 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 196 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 197 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 198 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 199 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 200 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 201 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 202 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 203 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 204 | // Write page protection byte. |
IanBenzMaxim | 25:bdb1c5a53b58 | 205 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 206 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 207 | // block - block number (0 to 7) which covers two pages each |
IanBenzMaxim | 25:bdb1c5a53b58 | 208 | // prot - protection byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 209 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 210 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 211 | // Returns: true - protection written |
IanBenzMaxim | 25:bdb1c5a53b58 | 212 | // false - Failed to set protection |
IanBenzMaxim | 25:bdb1c5a53b58 | 213 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 214 | OneWireSlave::CmdResult DS28E15_22_25::WriteBlockProtection(std::uint8_t protection, bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 215 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 216 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 217 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 218 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 219 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 220 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 221 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 222 | buf[cnt++] = CMD_WRITE_BLOCK_PROTECT; |
IanBenzMaxim | 25:bdb1c5a53b58 | 223 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 224 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 225 | // compute parameter byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 226 | buf[cnt++] = protection; |
IanBenzMaxim | 25:bdb1c5a53b58 | 227 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 228 | m_OW_master.OWWriteBlock(&buf[0], cnt); |
IanBenzMaxim | 25:bdb1c5a53b58 | 229 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 230 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 231 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 232 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 233 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 234 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 235 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 236 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 237 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 238 | // DATASHEET_CORRECTION, on continue need second release byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 239 | if (continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 240 | m_OW_master.OWWriteByte(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 241 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 242 | // sent release |
IanBenzMaxim | 25:bdb1c5a53b58 | 243 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 244 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 245 | // now wait for programming |
IanBenzMaxim | 25:bdb1c5a53b58 | 246 | wait_ms(EEPROM_WRITE_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 247 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 248 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 249 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 250 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 251 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 252 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 253 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 254 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 255 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 256 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 257 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 258 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 259 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 260 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 261 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 262 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 263 | OneWireSlave::CmdResult DS28E15_22_25::ReadBlockProtectionStatus(unsigned int blockNum, std::uint8_t & status) |
IanBenzMaxim | 25:bdb1c5a53b58 | 264 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 265 | unsigned char buf; |
IanBenzMaxim | 25:bdb1c5a53b58 | 266 | CmdResult result = ReadStatus(false, false, blockNum, &buf); |
IanBenzMaxim | 25:bdb1c5a53b58 | 267 | if (result == Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 268 | status = buf; |
IanBenzMaxim | 25:bdb1c5a53b58 | 269 | return result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 270 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 271 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 272 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 273 | // Read status bytes, either personality or page protection. |
IanBenzMaxim | 25:bdb1c5a53b58 | 274 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 275 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 276 | // personality - flag to indicate the read is the 4 personality bytes (true) |
IanBenzMaxim | 25:bdb1c5a53b58 | 277 | // or page page protection (false) |
IanBenzMaxim | 25:bdb1c5a53b58 | 278 | // allpages - flag to indicate if just one page (false) or all (true) page protection |
IanBenzMaxim | 25:bdb1c5a53b58 | 279 | // bytes. |
IanBenzMaxim | 25:bdb1c5a53b58 | 280 | // page_num - page number if reading protection 0 to 1 |
IanBenzMaxim | 25:bdb1c5a53b58 | 281 | // rdbuf - 16 byte buffer personality bytes (length 4) or page protection |
IanBenzMaxim | 25:bdb1c5a53b58 | 282 | // (length 1 or 16) |
IanBenzMaxim | 25:bdb1c5a53b58 | 283 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 284 | // Returns: true - status read |
IanBenzMaxim | 25:bdb1c5a53b58 | 285 | // false - Failed to read status |
IanBenzMaxim | 25:bdb1c5a53b58 | 286 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 287 | OneWireSlave::CmdResult DS28E15_22_25::ReadStatus(bool personality, bool allpages, unsigned int pageNum, unsigned char *rdbuf) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 288 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 289 | unsigned char buf[256]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 290 | int cnt, offset, rdnum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 291 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 292 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 293 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 294 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 295 | buf[cnt++] = CMD_READ_STATUS; |
IanBenzMaxim | 25:bdb1c5a53b58 | 296 | if (personality) |
IanBenzMaxim | 25:bdb1c5a53b58 | 297 | buf[cnt++] = 0xE0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 298 | else if (!allpages) |
IanBenzMaxim | 25:bdb1c5a53b58 | 299 | buf[cnt++] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 300 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 301 | buf[cnt++] = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 302 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 303 | // send the command |
IanBenzMaxim | 25:bdb1c5a53b58 | 304 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 305 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 306 | offset = cnt + 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 307 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 308 | // adjust data length |
IanBenzMaxim | 25:bdb1c5a53b58 | 309 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 310 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 311 | if (personality) |
IanBenzMaxim | 25:bdb1c5a53b58 | 312 | rdnum = 8; |
IanBenzMaxim | 25:bdb1c5a53b58 | 313 | else if (allpages) |
IanBenzMaxim | 25:bdb1c5a53b58 | 314 | rdnum = 20; |
IanBenzMaxim | 25:bdb1c5a53b58 | 315 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 316 | rdnum = 5; |
IanBenzMaxim | 25:bdb1c5a53b58 | 317 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 318 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 319 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 320 | if ((personality) || (allpages)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 321 | rdnum = 8; |
IanBenzMaxim | 25:bdb1c5a53b58 | 322 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 323 | rdnum = 5; |
IanBenzMaxim | 25:bdb1c5a53b58 | 324 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 325 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 326 | // Read the bytes |
IanBenzMaxim | 25:bdb1c5a53b58 | 327 | m_OW_master.OWReadBlock(&buf[cnt],rdnum); |
IanBenzMaxim | 25:bdb1c5a53b58 | 328 | cnt += rdnum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 329 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 330 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 331 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 332 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 333 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 334 | if ((((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 335 | && (allpages || (pageNum == 15))) || |
IanBenzMaxim | 25:bdb1c5a53b58 | 336 | (personality || allpages || (pageNum == 1))) |
IanBenzMaxim | 25:bdb1c5a53b58 | 337 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 338 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 339 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 340 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 341 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 342 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 343 | // copy the data to the read buffer |
IanBenzMaxim | 25:bdb1c5a53b58 | 344 | memcpy(rdbuf, &buf[offset], rdnum - 4); |
IanBenzMaxim | 25:bdb1c5a53b58 | 345 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 346 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 347 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 348 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 349 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 350 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 351 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 352 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateAuthMAC256(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, const std::uint8_t (&challenge)[scratchpadSize], const std::uint8_t (&pageData)[pageSize], const RomId & romId, const std::uint8_t (&manId)[manIdLen], bool anon, std::uint8_t (&mac)[macLen]) |
IanBenzMaxim | 25:bdb1c5a53b58 | 353 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 354 | std::uint8_t pageBuf[pageSize], challengeBuf[scratchpadSize], AuthMAC_data[ISha256MacCoprocessor::AuthMAC_data_len]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 355 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 356 | // insert page data |
IanBenzMaxim | 25:bdb1c5a53b58 | 357 | std::memcpy(pageBuf, pageData, pageSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 358 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 359 | // insert challenge |
IanBenzMaxim | 25:bdb1c5a53b58 | 360 | std::memcpy(challengeBuf, challenge, scratchpadSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 361 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 362 | // insert ROM number or FF |
IanBenzMaxim | 25:bdb1c5a53b58 | 363 | if (anon) |
IanBenzMaxim | 25:bdb1c5a53b58 | 364 | std::memset(AuthMAC_data, 0xFF, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 365 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 366 | std::memcpy(AuthMAC_data, romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 367 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 368 | AuthMAC_data[10] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 369 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 370 | AuthMAC_data[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 371 | AuthMAC_data[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 372 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 373 | AuthMAC_data[11] = 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 374 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 375 | return MacCoproc.ComputeAndRead_AuthMAC(pageBuf, challengeBuf, AuthMAC_data, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 376 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 377 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 378 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 379 | // Verify provided MAC and page data. Optionally do |
IanBenzMaxim | 25:bdb1c5a53b58 | 380 | // annonymous mode (anon != 0). |
IanBenzMaxim | 25:bdb1c5a53b58 | 381 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 382 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 383 | // page_num - page number to read 0 - 16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 384 | // challange - 32 byte buffer containing the challenge |
IanBenzMaxim | 25:bdb1c5a53b58 | 385 | // page_data - 32 byte buffer to contain the data read |
IanBenzMaxim | 25:bdb1c5a53b58 | 386 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
IanBenzMaxim | 25:bdb1c5a53b58 | 387 | // mac - 32 byte buffer of mac read |
IanBenzMaxim | 25:bdb1c5a53b58 | 388 | // anon - Flag to indicate Annonymous mode |
IanBenzMaxim | 25:bdb1c5a53b58 | 389 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 390 | // Returns: true - page read has correct MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 391 | // false - Failed to read page or incorrect MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 392 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 393 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::AuthVerify(const ISha256MacCoprocessor & MacCoproc, unsigned int page_num, const std::uint8_t (&challenge)[scratchpadSize], const std::uint8_t (&pageData)[pageSize], const RomId & romId, const std::uint8_t (&manId)[manIdLen], bool anon, const std::uint8_t (&mac)[macLen]) |
IanBenzMaxim | 25:bdb1c5a53b58 | 394 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 395 | std::uint8_t calc_mac[macLen]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 396 | ISha256MacCoprocessor::CmdResult result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 397 | result = CalculateAuthMAC256(MacCoproc, page_num, challenge, pageData, romId, manId, anon, calc_mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 398 | if (result == ISha256MacCoprocessor::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 399 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 400 | if (memcmp(mac, calc_mac, macLen) != 0) |
IanBenzMaxim | 25:bdb1c5a53b58 | 401 | result = ISha256MacCoprocessor::OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 402 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 403 | return result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 404 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 405 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 406 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 407 | // Do Compute Page MAC command and return MAC. Optionally do |
IanBenzMaxim | 25:bdb1c5a53b58 | 408 | // annonymous mode (anon != 0). |
IanBenzMaxim | 25:bdb1c5a53b58 | 409 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 410 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 411 | // sn - secret number 0 or 1 |
IanBenzMaxim | 25:bdb1c5a53b58 | 412 | // page_num - page number to read 0 - 16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 413 | // challange - 32 byte buffer containing the challenge |
IanBenzMaxim | 25:bdb1c5a53b58 | 414 | // mac - 32 byte buffer for page data read |
IanBenzMaxim | 25:bdb1c5a53b58 | 415 | // anon - Flag to indicate Annonymous mode |
IanBenzMaxim | 25:bdb1c5a53b58 | 416 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 417 | // Returns: true - page read has correct MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 418 | // false - Failed to read page or incorrect MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 419 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 420 | OneWireSlave::CmdResult DS28E15_22_25::ComputeReadPageMAC(unsigned int page_num, bool anon, std::uint8_t (&mac)[macLen]) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 421 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 422 | std::uint8_t buf[256],cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 423 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 424 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 425 | buf[cnt++] = CMD_COMPUTE_PAGEMAC; |
IanBenzMaxim | 25:bdb1c5a53b58 | 426 | buf[cnt++] = ((anon) ? 0xE0 : 0x00) | page_num; |
IanBenzMaxim | 25:bdb1c5a53b58 | 427 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 428 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 429 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 430 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 431 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 432 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 433 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 434 | // read the last CRC and enable |
IanBenzMaxim | 25:bdb1c5a53b58 | 435 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 436 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 437 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 438 | wait_ms(SHA_COMPUTATION_DELAY * 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 439 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 440 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 441 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 442 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 443 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 444 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 445 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 446 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 447 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 448 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 449 | if (cs != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 450 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 451 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 452 | // read the MAC and CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 453 | m_OW_master.OWReadBlock(&buf[0], (macLen + 2)); |
IanBenzMaxim | 25:bdb1c5a53b58 | 454 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 455 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 456 | if (OneWireMaster::calculateCRC16(buf, 0, (macLen + 2)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 457 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 458 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 459 | // copy MAC to return buffer |
IanBenzMaxim | 25:bdb1c5a53b58 | 460 | memcpy(mac, buf, macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 461 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 462 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 463 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 464 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 465 | //---------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 466 | // Compute secret operation on the DS28E25/DS28E22/DS28E15. |
IanBenzMaxim | 25:bdb1c5a53b58 | 467 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 468 | // 'sn' - secret number 0 or 1 |
IanBenzMaxim | 25:bdb1c5a53b58 | 469 | // 'partial' - partial secret to load (32 bytes) |
IanBenzMaxim | 25:bdb1c5a53b58 | 470 | // 'pagedata' - page data to compute (32 bytes) |
IanBenzMaxim | 25:bdb1c5a53b58 | 471 | // 'lock' - option to lock the secret after the load (lock = true) |
IanBenzMaxim | 25:bdb1c5a53b58 | 472 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 473 | // Return: true - load complete |
IanBenzMaxim | 25:bdb1c5a53b58 | 474 | // false - error during load, device not present |
IanBenzMaxim | 25:bdb1c5a53b58 | 475 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 476 | OneWireSlave::CmdResult DS28E15_22_25::ComputeSecret(unsigned int page_num, bool lock) |
IanBenzMaxim | 25:bdb1c5a53b58 | 477 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 478 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 479 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 480 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 481 | buf[cnt++] = CMD_COMPUTE_LOCK_SECRET; |
IanBenzMaxim | 25:bdb1c5a53b58 | 482 | buf[cnt++] = (lock) ? (0xE0 | page_num) : page_num; // lock flag |
IanBenzMaxim | 25:bdb1c5a53b58 | 483 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 484 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 485 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 486 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 487 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 488 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 489 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 490 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 491 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 492 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 493 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 494 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 495 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 496 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 497 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 498 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 499 | wait_ms(SHA_COMPUTATION_DELAY * 2 + SECRET_EEPROM_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 500 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 501 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 502 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 503 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 504 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 505 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 506 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 507 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 508 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 509 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 510 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 511 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 512 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 513 | //---------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 514 | // Write the scratchpad (challenge or secret) |
IanBenzMaxim | 25:bdb1c5a53b58 | 515 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 516 | // 'sn' - secret number 0 or 1 |
IanBenzMaxim | 25:bdb1c5a53b58 | 517 | // 'data' - data to write to the scratchpad (32 bytes) |
IanBenzMaxim | 25:bdb1c5a53b58 | 518 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 519 | // Return: true - select complete |
IanBenzMaxim | 25:bdb1c5a53b58 | 520 | // false - error during select, device not present |
IanBenzMaxim | 25:bdb1c5a53b58 | 521 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 522 | OneWireSlave::CmdResult DS28E15_22_25::WriteScratchpad(const uint8_t (&data)[scratchpadSize]) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 523 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 524 | std::uint8_t buf[256]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 525 | int cnt = 0, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 526 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 527 | buf[cnt++] = CMD_SELECT_SECRET; |
IanBenzMaxim | 25:bdb1c5a53b58 | 528 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 529 | buf[cnt++] = 0x20; |
IanBenzMaxim | 25:bdb1c5a53b58 | 530 | else |
IanBenzMaxim | 25:bdb1c5a53b58 | 531 | buf[cnt++] = 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 532 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 533 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 534 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 535 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 536 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 537 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 538 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 539 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 540 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 541 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 542 | // add the data |
IanBenzMaxim | 25:bdb1c5a53b58 | 543 | memcpy(&buf[cnt], data, scratchpadSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 544 | cnt += scratchpadSize; |
IanBenzMaxim | 25:bdb1c5a53b58 | 545 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 546 | // Send the data |
IanBenzMaxim | 25:bdb1c5a53b58 | 547 | m_OW_master.OWWriteBlock(data, scratchpadSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 548 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 549 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 550 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 551 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 552 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 553 | // check first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 554 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 555 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 556 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 557 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 558 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 559 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 560 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 561 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 562 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 563 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 564 | //---------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 565 | // Load first secret operation on the DS28E25/DS28E22/DS28E15. |
IanBenzMaxim | 25:bdb1c5a53b58 | 566 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 567 | // 'sn' - secret number 0 or 1 |
IanBenzMaxim | 25:bdb1c5a53b58 | 568 | // 'secret' - secret to load (32 bytes) |
IanBenzMaxim | 25:bdb1c5a53b58 | 569 | // 'lock' - option to lock the secret after the load (lock = true) |
IanBenzMaxim | 25:bdb1c5a53b58 | 570 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 571 | // Return: true - load complete |
IanBenzMaxim | 25:bdb1c5a53b58 | 572 | // false - error during load, device not present |
IanBenzMaxim | 25:bdb1c5a53b58 | 573 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 574 | OneWireSlave::CmdResult DS28E15_22_25::LoadSecret(bool lock) |
IanBenzMaxim | 25:bdb1c5a53b58 | 575 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 576 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 577 | int cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 578 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 579 | buf[cnt++] = CMD_LOAD_LOCK_SECRET; |
IanBenzMaxim | 25:bdb1c5a53b58 | 580 | buf[cnt++] = (lock) ? 0xE0 : 0x00; // lock flag |
IanBenzMaxim | 25:bdb1c5a53b58 | 581 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 582 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 583 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 584 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 585 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 586 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 587 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 588 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 589 | // check CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 590 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 591 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 592 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 593 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 594 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 595 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 596 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 597 | wait_ms(SECRET_EEPROM_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 598 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 599 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 600 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 601 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 602 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 603 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 604 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 605 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 606 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 607 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 608 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 609 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 610 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 611 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 612 | // Read page and verify CRC. Multiple pages can |
IanBenzMaxim | 25:bdb1c5a53b58 | 613 | // be read without re-selecting the device using the continue flag. |
IanBenzMaxim | 25:bdb1c5a53b58 | 614 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 615 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 616 | // page - page number where the block to write is located (0 to 15) |
IanBenzMaxim | 25:bdb1c5a53b58 | 617 | // rdbuf - 32 byte buffer to contain the data to read |
IanBenzMaxim | 25:bdb1c5a53b58 | 618 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 619 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 620 | // Returns: true - block read and verified CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 621 | // false - Failed to write block (no presence or invalid CRC16) |
IanBenzMaxim | 25:bdb1c5a53b58 | 622 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 623 | OneWireSlave::CmdResult DS28E15_22_25::readPage(unsigned int page, std::uint8_t (&rdbuf)[pageSize], bool continuing) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 624 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 625 | std::uint8_t buf[256]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 626 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 627 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 628 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 629 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 630 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 631 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 632 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 633 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 634 | buf[cnt++] = CMD_READ_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 635 | buf[cnt++] = page; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 636 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 637 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 638 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 639 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 640 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 641 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 642 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 643 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 644 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 645 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 646 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 647 | // read data and CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 648 | m_OW_master.OWReadBlock(&buf[cnt], (pageSize + 2)); |
IanBenzMaxim | 25:bdb1c5a53b58 | 649 | cnt+=34; |
IanBenzMaxim | 25:bdb1c5a53b58 | 650 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 651 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 652 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 653 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 654 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 655 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 656 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 657 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 658 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 659 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 660 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 661 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 662 | // copy the data to the read buffer |
IanBenzMaxim | 25:bdb1c5a53b58 | 663 | memcpy(rdbuf, &buf[offset], pageSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 664 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 665 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 666 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 667 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 668 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 669 | // Write a 4 byte memory block using an authenticated write (with MAC). |
IanBenzMaxim | 25:bdb1c5a53b58 | 670 | // The MAC must be pre-calculated. |
IanBenzMaxim | 25:bdb1c5a53b58 | 671 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 672 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 673 | // page - page number where the block to write is located (0 to 15) |
IanBenzMaxim | 25:bdb1c5a53b58 | 674 | // block - block number in page (0 to 7) |
IanBenzMaxim | 25:bdb1c5a53b58 | 675 | // new_data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 676 | // mac - mac to use for the write |
IanBenzMaxim | 25:bdb1c5a53b58 | 677 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 678 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 679 | // Returns: true - block written |
IanBenzMaxim | 25:bdb1c5a53b58 | 680 | // false - Failed to write block (no presence or invalid CRC16) |
IanBenzMaxim | 25:bdb1c5a53b58 | 681 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 682 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthSegmentMAC(unsigned int pageNum, unsigned int segmentNum, const std::uint8_t (&newData)[segmentSize], const std::uint8_t (&mac)[macLen], bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 683 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 684 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 685 | int cnt, i, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 686 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 687 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 688 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 689 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 690 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 691 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 692 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 693 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 694 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 695 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 696 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 697 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 698 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 699 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 700 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 701 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 702 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 703 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 704 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 705 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 706 | // add the data |
IanBenzMaxim | 25:bdb1c5a53b58 | 707 | for (i = 0; i < 4; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 708 | buf[cnt++] = newData[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 709 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 710 | // Send data |
IanBenzMaxim | 25:bdb1c5a53b58 | 711 | m_OW_master.OWWriteBlock(newData, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 712 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 713 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 714 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 715 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 716 | // read the last CRC and enable power |
IanBenzMaxim | 25:bdb1c5a53b58 | 717 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 718 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 719 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 720 | wait_ms(SHA_COMPUTATION_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 721 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 722 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 723 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 724 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 725 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 726 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 727 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 728 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 729 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 730 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 731 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 732 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 733 | unsigned short CRC16 = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 734 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 735 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 736 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 737 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 738 | if (continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 739 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 740 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 741 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 742 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 743 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 744 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 745 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 746 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 747 | // transmit MAC as a block |
IanBenzMaxim | 25:bdb1c5a53b58 | 748 | m_OW_master.OWWriteBlock(mac, macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 749 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 750 | // calculate CRC on MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 751 | CRC16 = OneWireMaster::calculateCRC16(mac, 0, macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 752 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 753 | // append read of CRC16 and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 754 | m_OW_master.OWReadBlock(&buf[0], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 755 | cnt = 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 756 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 757 | // ckeck CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 758 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 759 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 760 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 761 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 762 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 763 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 764 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 765 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 766 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 767 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 768 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 769 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 770 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 771 | wait_ms(EEPROM_WRITE_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 772 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 773 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 774 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 775 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 776 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 777 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 778 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 779 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 780 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 781 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 782 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 783 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 784 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 785 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 786 | // Compute MAC to write a 4 byte memory block using an authenticated |
IanBenzMaxim | 25:bdb1c5a53b58 | 787 | // write. |
IanBenzMaxim | 25:bdb1c5a53b58 | 788 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 789 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 790 | // page - page number where the block to write is located (0 to 15) |
IanBenzMaxim | 25:bdb1c5a53b58 | 791 | // block - block number in page (0 to 7) |
IanBenzMaxim | 25:bdb1c5a53b58 | 792 | // new_data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 793 | // old_data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 794 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
IanBenzMaxim | 25:bdb1c5a53b58 | 795 | // mac - buffer to put the calculated mac into |
IanBenzMaxim | 25:bdb1c5a53b58 | 796 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 797 | // Returns: true - mac calculated |
IanBenzMaxim | 25:bdb1c5a53b58 | 798 | // false - Failed to calculate |
IanBenzMaxim | 25:bdb1c5a53b58 | 799 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 800 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateSegmentWriteMAC256(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, unsigned int segmentNum, const std::uint8_t (&newData)[segmentSize], const std::uint8_t (&oldData)[segmentSize], const RomId & romId, const std::uint8_t (&manId)[manIdLen], std::uint8_t (&mac)[macLen]) |
IanBenzMaxim | 25:bdb1c5a53b58 | 801 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 802 | std::uint8_t MT[ISha256MacCoprocessor::WriteMAC_data_len]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 803 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 804 | // insert ROM number |
IanBenzMaxim | 25:bdb1c5a53b58 | 805 | memcpy(&MT[0], romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 806 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 807 | MT[11] = segmentNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 808 | MT[10] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 809 | MT[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 810 | MT[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 811 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 812 | // insert old data |
IanBenzMaxim | 25:bdb1c5a53b58 | 813 | memcpy(&MT[12], oldData, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 814 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 815 | // insert new data |
IanBenzMaxim | 25:bdb1c5a53b58 | 816 | memcpy(&MT[16], newData, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 817 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 818 | return MacCoproc.ComputeAndRead_WriteMAC(MT, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 819 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 820 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 821 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 822 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 823 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 824 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateProtectionWriteMAC256(const ISha256MacCoprocessor & MacCoproc, std::uint8_t newProtection, std::uint8_t oldProtection, const RomId & romId, const std::uint8_t (&manId)[manIdLen], std::uint8_t (&mac)[macLen]) |
IanBenzMaxim | 25:bdb1c5a53b58 | 825 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 826 | std::uint8_t MT[ISha256MacCoprocessor::WriteMAC_data_len]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 827 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 828 | // insert ROM number |
IanBenzMaxim | 25:bdb1c5a53b58 | 829 | std::memcpy(MT, romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 830 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 831 | // instert block and page |
IanBenzMaxim | 25:bdb1c5a53b58 | 832 | MT[11] = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 833 | MT[10] = newProtection & 0x0F; |
IanBenzMaxim | 25:bdb1c5a53b58 | 834 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 835 | MT[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 836 | MT[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 837 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 838 | // old data |
IanBenzMaxim | 25:bdb1c5a53b58 | 839 | MT[12] = (oldProtection & PROT_BIT_AUTHWRITE) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 840 | MT[13] = (oldProtection & PROT_BIT_EPROM) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 841 | MT[14] = (oldProtection & PROT_BIT_WRITE) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 842 | MT[15] = (oldProtection & PROT_BIT_READ) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 843 | // new data |
IanBenzMaxim | 25:bdb1c5a53b58 | 844 | MT[16] = (newProtection & PROT_BIT_AUTHWRITE) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 845 | MT[17] = (newProtection & PROT_BIT_EPROM) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 846 | MT[18] = (newProtection & PROT_BIT_WRITE) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 847 | MT[19] = (newProtection & PROT_BIT_READ) ? 0x01 : 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 848 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 849 | // compute the mac |
IanBenzMaxim | 25:bdb1c5a53b58 | 850 | return MacCoproc.ComputeAndRead_WriteMAC(MT, mac); |
IanBenzMaxim | 25:bdb1c5a53b58 | 851 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 852 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 853 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 854 | // Write a 4 byte memory block using an authenticated write (with MAC). |
IanBenzMaxim | 25:bdb1c5a53b58 | 855 | // The block location is selected by the |
IanBenzMaxim | 25:bdb1c5a53b58 | 856 | // page number and offset block within the page. Multiple blocks can |
IanBenzMaxim | 25:bdb1c5a53b58 | 857 | // be programmed without re-selecting the device using the continue flag. |
IanBenzMaxim | 25:bdb1c5a53b58 | 858 | // This function does not use the Authenticated Write operation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 859 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 860 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 861 | // page - page number where the block to write is located (0 to 15) |
IanBenzMaxim | 25:bdb1c5a53b58 | 862 | // block - block number in page (0 to 7) |
IanBenzMaxim | 25:bdb1c5a53b58 | 863 | // new_data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 864 | // old_data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 865 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
IanBenzMaxim | 25:bdb1c5a53b58 | 866 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 867 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 868 | // Returns: true - block written |
IanBenzMaxim | 25:bdb1c5a53b58 | 869 | // false - Failed to write block (no presence or invalid CRC16) |
IanBenzMaxim | 25:bdb1c5a53b58 | 870 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 871 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthSegment(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, unsigned int segmentNum, const std::uint8_t (&newData)[segmentSize], const std::uint8_t (&oldData)[segmentSize], bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 872 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 873 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 874 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 875 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 876 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 877 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 878 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 879 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 880 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 881 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 882 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 883 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 884 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 885 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 886 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 887 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 888 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 889 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 890 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 891 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 892 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 893 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 894 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 895 | // add the data |
IanBenzMaxim | 25:bdb1c5a53b58 | 896 | for (size_t i = 0; i < segmentSize; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 897 | buf[cnt++] = newData[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 898 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 899 | // Send data |
IanBenzMaxim | 25:bdb1c5a53b58 | 900 | m_OW_master.OWWriteBlock(newData, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 901 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 902 | // read first CRC byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 903 | m_OW_master.OWReadByte(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 904 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 905 | // read the last CRC and enable power |
IanBenzMaxim | 25:bdb1c5a53b58 | 906 | m_OW_master.OWReadBytePower(buf[cnt++]); |
IanBenzMaxim | 25:bdb1c5a53b58 | 907 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 908 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 909 | wait_ms(SHA_COMPUTATION_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 910 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 911 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 912 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 913 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 914 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 915 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 916 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 917 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 918 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 919 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 920 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 921 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 922 | unsigned short CRC16 = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 923 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 924 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 925 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
IanBenzMaxim | 25:bdb1c5a53b58 | 926 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 927 | if (continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 928 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 929 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 930 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 931 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 932 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 933 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 934 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 935 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 936 | // compute the mac |
IanBenzMaxim | 25:bdb1c5a53b58 | 937 | ISha256MacCoprocessor::CmdResult result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 938 | result = CalculateSegmentWriteMAC256(MacCoproc, pageNum, segmentNum, newData, oldData, romId, manId, reinterpret_cast<std::uint8_t (&)[macLen]>(buf)); |
IanBenzMaxim | 25:bdb1c5a53b58 | 939 | if (result != ISha256MacCoprocessor::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 940 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 941 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 942 | // transmit MAC as a block |
IanBenzMaxim | 25:bdb1c5a53b58 | 943 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 944 | m_OW_master.OWWriteBlock(buf, macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 945 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 946 | // calculate CRC on MAC |
IanBenzMaxim | 25:bdb1c5a53b58 | 947 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, macLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 948 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 949 | // append read of CRC16 and CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 950 | m_OW_master.OWReadBlock(&buf[0], 3); |
IanBenzMaxim | 25:bdb1c5a53b58 | 951 | cnt = 3; |
IanBenzMaxim | 25:bdb1c5a53b58 | 952 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 953 | // ckeck CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 954 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
IanBenzMaxim | 25:bdb1c5a53b58 | 955 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 956 | if (CRC16 != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 957 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 958 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 959 | // check CS |
IanBenzMaxim | 25:bdb1c5a53b58 | 960 | if (buf[cnt-1] != 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 961 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 962 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 963 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 964 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 965 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 966 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 967 | wait_ms(EEPROM_WRITE_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 968 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 969 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 970 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 971 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 972 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 973 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 974 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 975 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 976 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 977 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 978 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 979 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 980 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 981 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 982 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 983 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 984 | OneWireSlave::CmdResult DS28E15_22_25::readSegment(unsigned int page, unsigned int segment, std::uint8_t (&data)[segmentSize]) const |
IanBenzMaxim | 25:bdb1c5a53b58 | 985 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 986 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 25:bdb1c5a53b58 | 987 | std::uint8_t buf[2]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 988 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 989 | buf[0] = CMD_READ_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 990 | buf[1] = (segment << 5) | page; |
IanBenzMaxim | 25:bdb1c5a53b58 | 991 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 992 | // Transmit command |
IanBenzMaxim | 25:bdb1c5a53b58 | 993 | m_OW_master.OWWriteBlock(buf, 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 994 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 995 | // Receive CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 996 | result = m_OW_master.OWReadBlock(buf, 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 997 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 998 | // Receive data |
IanBenzMaxim | 25:bdb1c5a53b58 | 999 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1000 | result = m_OW_master.OWReadBlock(data, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1001 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1002 | return (result == OneWireMaster::Success ? OneWireSlave::Success : OneWireSlave::CommunicationError); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1003 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 1004 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1005 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 1006 | // Write a 4 byte memory block. The block location is selected by the |
IanBenzMaxim | 25:bdb1c5a53b58 | 1007 | // page number and offset blcok within the page. Multiple blocks can |
IanBenzMaxim | 25:bdb1c5a53b58 | 1008 | // be programmed without re-selecting the device using the continue flag. |
IanBenzMaxim | 25:bdb1c5a53b58 | 1009 | // This function does not use the Authenticated Write operation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 1010 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1011 | // Parameters |
IanBenzMaxim | 25:bdb1c5a53b58 | 1012 | // page - page number where the block to write is located (0 to 15) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1013 | // block - block number in page (0 to 7) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1014 | // data - 4 byte buffer containing the data to write |
IanBenzMaxim | 25:bdb1c5a53b58 | 1015 | // contflag - Flag to indicate the write is continued from the last |
IanBenzMaxim | 25:bdb1c5a53b58 | 1016 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1017 | // Returns: true - block written |
IanBenzMaxim | 25:bdb1c5a53b58 | 1018 | // false - Failed to write block (no presence or invalid CRC16) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1019 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1020 | OneWireSlave::CmdResult DS28E15_22_25::writeSegment(unsigned int page, unsigned int block, const std::uint8_t (&data)[segmentSize], bool continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1021 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 1022 | std::uint8_t buf[256], cs; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1023 | int cnt, offset; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1024 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1025 | cnt = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1026 | offset = 0; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1027 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1028 | // check if not continuing a previous block write |
IanBenzMaxim | 25:bdb1c5a53b58 | 1029 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1030 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 1031 | buf[cnt++] = CMD_WRITE_MEMORY; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1032 | buf[cnt++] = (block << 5) | page; // address |
IanBenzMaxim | 25:bdb1c5a53b58 | 1033 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1034 | // Send command |
IanBenzMaxim | 25:bdb1c5a53b58 | 1035 | m_OW_master.OWWriteBlock(&buf[0], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1036 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1037 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 1038 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1039 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1040 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1041 | offset = cnt; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1042 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 1043 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1044 | // add the data |
IanBenzMaxim | 25:bdb1c5a53b58 | 1045 | for (size_t i = 0; i < segmentSize; i++) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1046 | buf[cnt++] = data[i]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1047 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1048 | // Send data |
IanBenzMaxim | 25:bdb1c5a53b58 | 1049 | m_OW_master.OWWriteBlock(data, segmentSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1050 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1051 | // Read CRC |
IanBenzMaxim | 25:bdb1c5a53b58 | 1052 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1053 | cnt += 2; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1054 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1055 | // check the first CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 1056 | if (!continuing) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1057 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 1058 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1059 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1060 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 1061 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1062 | // check the second CRC16 |
IanBenzMaxim | 25:bdb1c5a53b58 | 1063 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1064 | return CommunicationError; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1065 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1066 | // send release and strong pull-up |
IanBenzMaxim | 25:bdb1c5a53b58 | 1067 | m_OW_master.OWWriteBytePower(0xAA); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1068 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1069 | // now wait for the MAC computation. |
IanBenzMaxim | 25:bdb1c5a53b58 | 1070 | wait_ms(EEPROM_WRITE_DELAY); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1071 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1072 | // disable strong pullup |
IanBenzMaxim | 25:bdb1c5a53b58 | 1073 | m_OW_master.OWLevel(OneWireMaster::LEVEL_NORMAL); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1074 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1075 | // read the CS byte |
IanBenzMaxim | 25:bdb1c5a53b58 | 1076 | m_OW_master.OWReadByte(cs); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1077 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1078 | if (cs == 0xAA) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1079 | return Success; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1080 | // else |
IanBenzMaxim | 25:bdb1c5a53b58 | 1081 | return OperationFailure; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1082 | } |
IanBenzMaxim | 25:bdb1c5a53b58 | 1083 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1084 | //---------------------------------------------------------------------- |
IanBenzMaxim | 25:bdb1c5a53b58 | 1085 | // Performs a Compute Next SHA-256 calculation given the provided 32-bytes |
IanBenzMaxim | 25:bdb1c5a53b58 | 1086 | // of binding data and 8 byte partial secret. The first 8 bytes of the |
IanBenzMaxim | 25:bdb1c5a53b58 | 1087 | // resulting MAC is set as the new secret. |
IanBenzMaxim | 25:bdb1c5a53b58 | 1088 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1089 | // 'binding' - 32 byte buffer containing the binding data |
IanBenzMaxim | 25:bdb1c5a53b58 | 1090 | // 'partial' - 8 byte buffer with new partial secret |
IanBenzMaxim | 25:bdb1c5a53b58 | 1091 | // 'page_num' - page number that the compute is calculated on |
IanBenzMaxim | 25:bdb1c5a53b58 | 1092 | // 'manid' - manufacturer ID |
IanBenzMaxim | 25:bdb1c5a53b58 | 1093 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1094 | // Globals used : SECRET used in calculation and set to new secret |
IanBenzMaxim | 25:bdb1c5a53b58 | 1095 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1096 | // Returns: true if compute successful |
IanBenzMaxim | 25:bdb1c5a53b58 | 1097 | // false failed to do compute |
IanBenzMaxim | 25:bdb1c5a53b58 | 1098 | // |
IanBenzMaxim | 25:bdb1c5a53b58 | 1099 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateNextSecret(ISha256MacCoprocessor & MacCoproc, const std::uint8_t (&binding)[pageSize], const std::uint8_t (&partial)[scratchpadSize], const RomId & romId, const std::uint8_t (&manId)[manIdLen], unsigned int pageNum) |
IanBenzMaxim | 25:bdb1c5a53b58 | 1100 | { |
IanBenzMaxim | 25:bdb1c5a53b58 | 1101 | std::uint8_t devicePage[pageSize], deviceScratchpad[scratchpadSize], SSecret_data[ISha256MacCoprocessor::SSecret_data_len]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1102 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1103 | // insert page data |
IanBenzMaxim | 25:bdb1c5a53b58 | 1104 | memcpy(devicePage, binding, pageSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1105 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1106 | // insert challenge |
IanBenzMaxim | 25:bdb1c5a53b58 | 1107 | memcpy(deviceScratchpad, partial, scratchpadSize); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1108 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1109 | // insert ROM number |
IanBenzMaxim | 25:bdb1c5a53b58 | 1110 | std::memcpy(SSecret_data, romId, RomId::byteLen); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1111 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1112 | SSecret_data[11] = 0x00; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1113 | SSecret_data[10] = pageNum; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1114 | SSecret_data[9] = manId[0]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1115 | SSecret_data[8] = manId[1]; |
IanBenzMaxim | 25:bdb1c5a53b58 | 1116 | |
IanBenzMaxim | 25:bdb1c5a53b58 | 1117 | return MacCoproc.Compute_SSecret(devicePage, deviceScratchpad, SSecret_data); |
IanBenzMaxim | 25:bdb1c5a53b58 | 1118 | } |