Maxim Integrated
1-Wire® library for mbed. Complete 1-Wire library that supports our silicon masters along with a bit-bang master on the MAX32600MBED platform with one common interface for mbed. Slave support has also been included and more slaves will be added as time permits.
Dependents: MAXREFDES131_Qt_Demo MAX32630FTHR_iButton_uSD_Logger MAX32630FTHR_DS18B20_uSD_Logger MAXREFDES130_131_Demo ... more
Superseded by MaximInterface.
OneWire_Memory/Authenticators/DS28E15_22_25/DS28E15_22_25.cpp@33:a4c015046956, 2016-03-31 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Thu Mar 31 11:56:01 2016 -0500
- Revision:
- 33:a4c015046956
- Parent:
- 32:bce180b544ed
- Child:
- 34:11fffbe98ef9
Created a generic array wrapper class. Updated array types used in ISha256MacCoprocessor and DS28E15_22_25 for clarity.
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 | 33:a4c015046956 | 68 | std::memset(manId, 0x00, manId.length); |
| 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 | 33:a4c015046956 | 140 | Mac mac; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 141 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 142 | buf[cnt++] = CMD_WRITE_AUTH_PROTECT; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 143 | buf[cnt++] = newProtection; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 144 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 145 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 146 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 147 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 148 | // read first CRC byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 149 | m_OW_master.OWReadByte(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 150 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 151 | // read the last CRC and enable |
| IanBenzMaxim | 25:bdb1c5a53b58 | 152 | m_OW_master.OWReadBytePower(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 153 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 154 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 155 | wait_ms(SHA_COMPUTATION_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 156 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 157 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 158 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 159 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 160 | // check CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 161 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 162 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 163 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 164 | ISha256MacCoprocessor::CmdResult result; |
| IanBenzMaxim | 33:a4c015046956 | 165 | result = CalculateProtectionWriteMAC256(MacCoproc, newProtection, oldProtection, romId, manId, mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 166 | if (result != ISha256MacCoprocessor::Success) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 167 | return OperationFailure; |
| IanBenzMaxim | 33:a4c015046956 | 168 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 169 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 170 | // send the MAC |
| IanBenzMaxim | 33:a4c015046956 | 171 | m_OW_master.OWWriteBlock(mac, mac.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 172 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 173 | // Read CRC and CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 174 | m_OW_master.OWReadBlock(&buf[cnt], 3); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 175 | cnt += 3; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 176 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 177 | // ckeck CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 178 | if (OneWireMaster::calculateCRC16(buf, 0, (cnt - 1)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 179 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 180 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 181 | // check CS |
| IanBenzMaxim | 25:bdb1c5a53b58 | 182 | if (buf[cnt-1] != 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 183 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 184 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 185 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 186 | // DATASHEET_CORRECTION - last bit in release is a read-zero so don't check echo of write byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 187 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 188 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 189 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 190 | wait_ms(EEPROM_WRITE_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 191 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 192 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 193 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 194 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 195 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 196 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 197 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 198 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 199 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 200 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 201 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 202 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 203 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 204 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 205 | // Write page protection byte. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 206 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 207 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 208 | // block - block number (0 to 7) which covers two pages each |
| IanBenzMaxim | 25:bdb1c5a53b58 | 209 | // prot - protection byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 210 | // contflag - Flag to indicate the write is continued from the last |
| IanBenzMaxim | 25:bdb1c5a53b58 | 211 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 212 | // Returns: true - protection written |
| IanBenzMaxim | 25:bdb1c5a53b58 | 213 | // false - Failed to set protection |
| IanBenzMaxim | 25:bdb1c5a53b58 | 214 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 215 | OneWireSlave::CmdResult DS28E15_22_25::WriteBlockProtection(std::uint8_t protection, bool continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 216 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 217 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 218 | int cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 219 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 220 | // check if not continuing a previous block write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 221 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 222 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 223 | buf[cnt++] = CMD_WRITE_BLOCK_PROTECT; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 224 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 225 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 226 | // compute parameter byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 227 | buf[cnt++] = protection; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 228 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 229 | m_OW_master.OWWriteBlock(&buf[0], cnt); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 230 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 231 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 232 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 233 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 234 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 235 | // check CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 236 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 237 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 238 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 239 | // DATASHEET_CORRECTION, on continue need second release byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 240 | if (continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 241 | m_OW_master.OWWriteByte(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 242 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 243 | // sent release |
| IanBenzMaxim | 25:bdb1c5a53b58 | 244 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 245 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 246 | // now wait for programming |
| IanBenzMaxim | 25:bdb1c5a53b58 | 247 | wait_ms(EEPROM_WRITE_DELAY); |
| 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 | 25:bdb1c5a53b58 | 261 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 262 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 263 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 264 | OneWireSlave::CmdResult DS28E15_22_25::ReadBlockProtectionStatus(unsigned int blockNum, std::uint8_t & status) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 265 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 266 | unsigned char buf; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 267 | CmdResult result = ReadStatus(false, false, blockNum, &buf); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 268 | if (result == Success) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 269 | status = buf; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 270 | return result; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 271 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 272 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 273 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 274 | // Read status bytes, either personality or page protection. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 275 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 276 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 277 | // personality - flag to indicate the read is the 4 personality bytes (true) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 278 | // or page page protection (false) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 279 | // allpages - flag to indicate if just one page (false) or all (true) page protection |
| IanBenzMaxim | 25:bdb1c5a53b58 | 280 | // bytes. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 281 | // page_num - page number if reading protection 0 to 1 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 282 | // rdbuf - 16 byte buffer personality bytes (length 4) or page protection |
| IanBenzMaxim | 25:bdb1c5a53b58 | 283 | // (length 1 or 16) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 284 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 285 | // Returns: true - status read |
| IanBenzMaxim | 25:bdb1c5a53b58 | 286 | // false - Failed to read status |
| IanBenzMaxim | 25:bdb1c5a53b58 | 287 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 288 | OneWireSlave::CmdResult DS28E15_22_25::ReadStatus(bool personality, bool allpages, unsigned int pageNum, unsigned char *rdbuf) const |
| IanBenzMaxim | 25:bdb1c5a53b58 | 289 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 290 | unsigned char buf[256]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 291 | int cnt, offset, rdnum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 292 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 293 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 294 | offset = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 295 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 296 | buf[cnt++] = CMD_READ_STATUS; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 297 | if (personality) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 298 | buf[cnt++] = 0xE0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 299 | else if (!allpages) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 300 | buf[cnt++] = pageNum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 301 | else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 302 | buf[cnt++] = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 303 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 304 | // send the command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 305 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 306 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 307 | offset = cnt + 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 308 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 309 | // adjust data length |
| IanBenzMaxim | 25:bdb1c5a53b58 | 310 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 311 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 312 | if (personality) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 313 | rdnum = 8; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 314 | else if (allpages) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 315 | rdnum = 20; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 316 | else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 317 | rdnum = 5; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 318 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 319 | else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 320 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 321 | if ((personality) || (allpages)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 322 | rdnum = 8; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 323 | else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 324 | rdnum = 5; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 325 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 326 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 327 | // Read the bytes |
| IanBenzMaxim | 25:bdb1c5a53b58 | 328 | m_OW_master.OWReadBlock(&buf[cnt],rdnum); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 329 | cnt += rdnum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 330 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 331 | // check the first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 332 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 333 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 334 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 335 | if ((((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 336 | && (allpages || (pageNum == 15))) || |
| IanBenzMaxim | 25:bdb1c5a53b58 | 337 | (personality || allpages || (pageNum == 1))) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 338 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 339 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 340 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 341 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 342 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 343 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 344 | // copy the data to the read buffer |
| IanBenzMaxim | 25:bdb1c5a53b58 | 345 | memcpy(rdbuf, &buf[offset], rdnum - 4); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 346 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 347 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 348 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 349 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 350 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 351 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 352 | |
| IanBenzMaxim | 33:a4c015046956 | 353 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateAuthMAC256(const ISha256MacCoprocessor & MacCoproc, unsigned int pageNum, const Scratchpad & challenge, const Page & pageData, const RomId & romId, const ManId & manId, bool anon, Mac & mac) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 354 | { |
| IanBenzMaxim | 33:a4c015046956 | 355 | ISha256MacCoprocessor::AuthMacData authMacData; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 356 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 357 | // insert ROM number or FF |
| IanBenzMaxim | 25:bdb1c5a53b58 | 358 | if (anon) |
| IanBenzMaxim | 33:a4c015046956 | 359 | std::memset(authMacData, 0xFF, RomId::byteLen); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 360 | else |
| IanBenzMaxim | 33:a4c015046956 | 361 | std::memcpy(authMacData, romId, RomId::byteLen); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 362 | |
| IanBenzMaxim | 33:a4c015046956 | 363 | authMacData[10] = pageNum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 364 | |
| IanBenzMaxim | 33:a4c015046956 | 365 | authMacData[9] = manId[0]; |
| IanBenzMaxim | 33:a4c015046956 | 366 | authMacData[8] = manId[1]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 367 | |
| IanBenzMaxim | 33:a4c015046956 | 368 | authMacData[11] = 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 369 | |
| IanBenzMaxim | 33:a4c015046956 | 370 | return MacCoproc.computeAuthMac(pageData, challenge, authMacData, mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 371 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 372 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 373 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 374 | // Verify provided MAC and page data. Optionally do |
| IanBenzMaxim | 25:bdb1c5a53b58 | 375 | // annonymous mode (anon != 0). |
| IanBenzMaxim | 25:bdb1c5a53b58 | 376 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 377 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 378 | // page_num - page number to read 0 - 16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 379 | // challange - 32 byte buffer containing the challenge |
| IanBenzMaxim | 25:bdb1c5a53b58 | 380 | // page_data - 32 byte buffer to contain the data read |
| IanBenzMaxim | 25:bdb1c5a53b58 | 381 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 382 | // mac - 32 byte buffer of mac read |
| IanBenzMaxim | 25:bdb1c5a53b58 | 383 | // anon - Flag to indicate Annonymous mode |
| IanBenzMaxim | 25:bdb1c5a53b58 | 384 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 385 | // Returns: true - page read has correct MAC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 386 | // false - Failed to read page or incorrect MAC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 387 | // |
| IanBenzMaxim | 33:a4c015046956 | 388 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::AuthVerify(const ISha256MacCoprocessor & MacCoproc, unsigned int page_num, const Scratchpad & challenge, const Page & pageData, const RomId & romId, const ManId & manId, bool anon, const Mac & mac) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 389 | { |
| IanBenzMaxim | 33:a4c015046956 | 390 | Mac calc_mac; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 391 | ISha256MacCoprocessor::CmdResult result; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 392 | result = CalculateAuthMAC256(MacCoproc, page_num, challenge, pageData, romId, manId, anon, calc_mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 393 | if (result == ISha256MacCoprocessor::Success) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 394 | { |
| IanBenzMaxim | 33:a4c015046956 | 395 | if (mac != calc_mac) |
| IanBenzMaxim | 33:a4c015046956 | 396 | result = ISha256MacCoprocessor::OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 397 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 398 | return result; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 399 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 400 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 401 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 402 | // Do Compute Page MAC command and return MAC. Optionally do |
| IanBenzMaxim | 25:bdb1c5a53b58 | 403 | // annonymous mode (anon != 0). |
| IanBenzMaxim | 25:bdb1c5a53b58 | 404 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 405 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 406 | // sn - secret number 0 or 1 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 407 | // page_num - page number to read 0 - 16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 408 | // challange - 32 byte buffer containing the challenge |
| IanBenzMaxim | 25:bdb1c5a53b58 | 409 | // mac - 32 byte buffer for page data read |
| IanBenzMaxim | 25:bdb1c5a53b58 | 410 | // anon - Flag to indicate Annonymous mode |
| IanBenzMaxim | 25:bdb1c5a53b58 | 411 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 412 | // Returns: true - page read has correct MAC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 413 | // false - Failed to read page or incorrect MAC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 414 | // |
| IanBenzMaxim | 33:a4c015046956 | 415 | OneWireSlave::CmdResult DS28E15_22_25::ComputeReadPageMAC(unsigned int page_num, bool anon, Mac & mac) const |
| IanBenzMaxim | 25:bdb1c5a53b58 | 416 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 417 | std::uint8_t buf[256],cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 418 | int cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 419 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 420 | buf[cnt++] = CMD_COMPUTE_PAGEMAC; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 421 | buf[cnt++] = ((anon) ? 0xE0 : 0x00) | page_num; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 422 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 423 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 424 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 425 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 426 | // read first CRC byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 427 | m_OW_master.OWReadByte(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 428 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 429 | // read the last CRC and enable |
| IanBenzMaxim | 25:bdb1c5a53b58 | 430 | m_OW_master.OWReadBytePower(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 431 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 432 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 433 | wait_ms(SHA_COMPUTATION_DELAY * 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 434 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 435 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 436 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 437 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 438 | // check CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 439 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 440 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 441 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 442 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 443 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 444 | if (cs != 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 445 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 446 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 447 | // read the MAC and CRC |
| IanBenzMaxim | 33:a4c015046956 | 448 | m_OW_master.OWReadBlock(&buf[0], (Mac::length + 2)); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 449 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 450 | // check CRC16 |
| IanBenzMaxim | 33:a4c015046956 | 451 | if (OneWireMaster::calculateCRC16(buf, 0, (Mac::length + 2)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 452 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 453 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 454 | // copy MAC to return buffer |
| IanBenzMaxim | 33:a4c015046956 | 455 | memcpy(mac, buf, Mac::length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 456 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 457 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 458 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 459 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 460 | //---------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 461 | // Compute secret operation on the DS28E25/DS28E22/DS28E15. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 462 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 463 | // 'sn' - secret number 0 or 1 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 464 | // 'partial' - partial secret to load (32 bytes) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 465 | // 'pagedata' - page data to compute (32 bytes) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 466 | // 'lock' - option to lock the secret after the load (lock = true) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 467 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 468 | // Return: true - load complete |
| IanBenzMaxim | 25:bdb1c5a53b58 | 469 | // false - error during load, device not present |
| IanBenzMaxim | 25:bdb1c5a53b58 | 470 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 471 | OneWireSlave::CmdResult DS28E15_22_25::ComputeSecret(unsigned int page_num, bool lock) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 472 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 473 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 474 | int cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 475 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 476 | buf[cnt++] = CMD_COMPUTE_LOCK_SECRET; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 477 | buf[cnt++] = (lock) ? (0xE0 | page_num) : page_num; // lock flag |
| IanBenzMaxim | 25:bdb1c5a53b58 | 478 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 479 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 480 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 481 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 482 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 483 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 484 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 485 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 486 | // check CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 487 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 488 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 489 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 490 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 491 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 492 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 493 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 494 | wait_ms(SHA_COMPUTATION_DELAY * 2 + SECRET_EEPROM_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 495 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 496 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 497 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 498 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 499 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 500 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 501 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 502 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 503 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 504 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 505 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 506 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 507 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 508 | //---------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 509 | // Write the scratchpad (challenge or secret) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 510 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 511 | // 'sn' - secret number 0 or 1 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 512 | // 'data' - data to write to the scratchpad (32 bytes) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 513 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 514 | // Return: true - select complete |
| IanBenzMaxim | 25:bdb1c5a53b58 | 515 | // false - error during select, device not present |
| IanBenzMaxim | 25:bdb1c5a53b58 | 516 | // |
| IanBenzMaxim | 33:a4c015046956 | 517 | OneWireSlave::CmdResult DS28E15_22_25::WriteScratchpad(const Scratchpad & data) const |
| IanBenzMaxim | 25:bdb1c5a53b58 | 518 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 519 | std::uint8_t buf[256]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 520 | int cnt = 0, offset; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 521 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 522 | buf[cnt++] = CMD_SELECT_SECRET; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 523 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 524 | buf[cnt++] = 0x20; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 525 | else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 526 | buf[cnt++] = 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 527 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 528 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 529 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 530 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 531 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 532 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 533 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 534 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 535 | offset = cnt; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 536 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 537 | // add the data |
| IanBenzMaxim | 33:a4c015046956 | 538 | memcpy(&buf[cnt], data, data.length); |
| IanBenzMaxim | 33:a4c015046956 | 539 | cnt += data.length; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 540 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 541 | // Send the data |
| IanBenzMaxim | 33:a4c015046956 | 542 | m_OW_master.OWWriteBlock(data, data.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 543 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 544 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 545 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 546 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 547 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 548 | // check first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 549 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 550 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 551 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 552 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 553 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 554 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 555 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 556 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 557 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 558 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 559 | //---------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 560 | // Load first secret operation on the DS28E25/DS28E22/DS28E15. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 561 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 562 | // 'sn' - secret number 0 or 1 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 563 | // 'secret' - secret to load (32 bytes) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 564 | // 'lock' - option to lock the secret after the load (lock = true) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 565 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 566 | // Return: true - load complete |
| IanBenzMaxim | 25:bdb1c5a53b58 | 567 | // false - error during load, device not present |
| IanBenzMaxim | 25:bdb1c5a53b58 | 568 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 569 | OneWireSlave::CmdResult DS28E15_22_25::LoadSecret(bool lock) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 570 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 571 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 572 | int cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 573 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 574 | buf[cnt++] = CMD_LOAD_LOCK_SECRET; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 575 | buf[cnt++] = (lock) ? 0xE0 : 0x00; // lock flag |
| IanBenzMaxim | 25:bdb1c5a53b58 | 576 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 577 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 578 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 579 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 580 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 581 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 582 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 583 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 584 | // check CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 585 | if (OneWireMaster::calculateCRC16(buf, 0, cnt) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 586 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 587 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 588 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 589 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 590 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 591 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 592 | wait_ms(SECRET_EEPROM_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 593 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 594 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 595 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 596 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 597 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 598 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 599 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 600 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 601 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 602 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 603 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 604 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 605 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 606 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 607 | // Read page and verify CRC. Multiple pages can |
| IanBenzMaxim | 25:bdb1c5a53b58 | 608 | // be read without re-selecting the device using the continue flag. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 609 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 610 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 611 | // page - page number where the block to write is located (0 to 15) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 612 | // rdbuf - 32 byte buffer to contain the data to read |
| IanBenzMaxim | 25:bdb1c5a53b58 | 613 | // contflag - Flag to indicate the write is continued from the last |
| IanBenzMaxim | 25:bdb1c5a53b58 | 614 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 615 | // Returns: true - block read and verified CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 616 | // false - Failed to write block (no presence or invalid CRC16) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 617 | // |
| IanBenzMaxim | 33:a4c015046956 | 618 | OneWireSlave::CmdResult DS28E15_22_25::readPage(unsigned int page, Page & rdbuf, bool continuing) const |
| IanBenzMaxim | 25:bdb1c5a53b58 | 619 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 620 | std::uint8_t buf[256]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 621 | int cnt, offset; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 622 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 623 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 624 | offset = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 625 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 626 | // check if not continuing a previous block write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 627 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 628 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 629 | buf[cnt++] = CMD_READ_MEMORY; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 630 | buf[cnt++] = page; // address |
| IanBenzMaxim | 25:bdb1c5a53b58 | 631 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 632 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 633 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 634 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 635 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 636 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 637 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 638 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 639 | offset = cnt; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 640 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 641 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 642 | // read data and CRC16 |
| IanBenzMaxim | 33:a4c015046956 | 643 | m_OW_master.OWReadBlock(&buf[cnt], (rdbuf.length + 2)); |
| IanBenzMaxim | 33:a4c015046956 | 644 | cnt += 34; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 645 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 646 | // check the first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 647 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 648 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 649 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 650 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 651 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 652 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 653 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 654 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 655 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 656 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 657 | // copy the data to the read buffer |
| IanBenzMaxim | 33:a4c015046956 | 658 | memcpy(rdbuf, &buf[offset], rdbuf.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 659 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 660 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 661 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 662 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 663 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 664 | // Write a 4 byte memory block using an authenticated write (with MAC). |
| IanBenzMaxim | 25:bdb1c5a53b58 | 665 | // The MAC must be pre-calculated. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 666 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 667 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 668 | // page - page number where the block to write is located (0 to 15) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 669 | // block - block number in page (0 to 7) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 670 | // new_data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 671 | // mac - mac to use for the write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 672 | // contflag - Flag to indicate the write is continued from the last |
| IanBenzMaxim | 25:bdb1c5a53b58 | 673 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 674 | // Returns: true - block written |
| IanBenzMaxim | 25:bdb1c5a53b58 | 675 | // false - Failed to write block (no presence or invalid CRC16) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 676 | // |
| IanBenzMaxim | 33:a4c015046956 | 677 | OneWireSlave::CmdResult DS28E15_22_25::writeAuthSegmentMAC(unsigned int pageNum, unsigned int segmentNum, const Segment & newData, const Mac & mac, bool continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 678 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 679 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 680 | int cnt, i, offset; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 681 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 682 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 683 | offset = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 684 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 685 | // check if not continuing a previous block write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 686 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 687 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 688 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 689 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
| IanBenzMaxim | 25:bdb1c5a53b58 | 690 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 691 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 692 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 693 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 694 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 695 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 696 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 697 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 698 | offset = cnt; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 699 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 700 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 701 | // add the data |
| IanBenzMaxim | 33:a4c015046956 | 702 | for (i = 0; i < newData.length; i++) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 703 | buf[cnt++] = newData[i]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 704 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 705 | // Send data |
| IanBenzMaxim | 33:a4c015046956 | 706 | m_OW_master.OWWriteBlock(newData, newData.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 707 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 708 | // read first CRC byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 709 | m_OW_master.OWReadByte(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 710 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 711 | // read the last CRC and enable power |
| IanBenzMaxim | 25:bdb1c5a53b58 | 712 | m_OW_master.OWReadBytePower(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 713 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 714 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 715 | wait_ms(SHA_COMPUTATION_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 716 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 717 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 718 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 719 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 720 | // check the first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 721 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 722 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 723 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 724 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 725 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 726 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 727 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 728 | unsigned short CRC16 = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 729 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 730 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 731 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 732 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 733 | if (continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 734 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 735 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 736 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 737 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 738 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 739 | if (CRC16 != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 740 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 741 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 742 | // transmit MAC as a block |
| IanBenzMaxim | 33:a4c015046956 | 743 | m_OW_master.OWWriteBlock(mac, mac.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 744 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 745 | // calculate CRC on MAC |
| IanBenzMaxim | 33:a4c015046956 | 746 | CRC16 = OneWireMaster::calculateCRC16(mac, 0, mac.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 747 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 748 | // append read of CRC16 and CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 749 | m_OW_master.OWReadBlock(&buf[0], 3); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 750 | cnt = 3; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 751 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 752 | // ckeck CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 753 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 754 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 755 | if (CRC16 != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 756 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 757 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 758 | // check CS |
| IanBenzMaxim | 25:bdb1c5a53b58 | 759 | if (buf[cnt-1] != 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 760 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 761 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 762 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 763 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 764 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 765 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 766 | wait_ms(EEPROM_WRITE_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 767 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 768 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 769 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 770 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 771 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 772 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 773 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 774 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 775 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 776 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 777 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 778 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 779 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 780 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 781 | // Compute MAC to write a 4 byte memory block using an authenticated |
| IanBenzMaxim | 25:bdb1c5a53b58 | 782 | // write. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 783 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 784 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 785 | // page - page number where the block to write is located (0 to 15) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 786 | // block - block number in page (0 to 7) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 787 | // new_data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 788 | // old_data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 789 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 790 | // mac - buffer to put the calculated mac into |
| IanBenzMaxim | 25:bdb1c5a53b58 | 791 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 792 | // Returns: true - mac calculated |
| IanBenzMaxim | 25:bdb1c5a53b58 | 793 | // false - Failed to calculate |
| IanBenzMaxim | 25:bdb1c5a53b58 | 794 | // |
| IanBenzMaxim | 33:a4c015046956 | 795 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateSegmentWriteMAC256(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 | 796 | { |
| IanBenzMaxim | 33:a4c015046956 | 797 | ISha256MacCoprocessor::WriteMacData MT; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 798 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 799 | // insert ROM number |
| IanBenzMaxim | 25:bdb1c5a53b58 | 800 | memcpy(&MT[0], romId, RomId::byteLen); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 801 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 802 | MT[11] = segmentNum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 803 | MT[10] = pageNum; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 804 | MT[9] = manId[0]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 805 | MT[8] = manId[1]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 806 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 807 | // insert old data |
| IanBenzMaxim | 33:a4c015046956 | 808 | memcpy(&MT[12], oldData, Segment::length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 809 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 810 | // insert new data |
| IanBenzMaxim | 33:a4c015046956 | 811 | memcpy(&MT[16], newData, Segment::length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 812 | |
| IanBenzMaxim | 33:a4c015046956 | 813 | return MacCoproc.computeWriteMac(MT, mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 814 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 815 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 816 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 817 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 818 | |
| IanBenzMaxim | 33:a4c015046956 | 819 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateProtectionWriteMAC256(const ISha256MacCoprocessor & MacCoproc, std::uint8_t newProtection, std::uint8_t oldProtection, const RomId & romId, const ManId & manId, Mac & mac) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 820 | { |
| IanBenzMaxim | 33:a4c015046956 | 821 | ISha256MacCoprocessor::WriteMacData MT; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 822 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 823 | // insert ROM number |
| IanBenzMaxim | 25:bdb1c5a53b58 | 824 | std::memcpy(MT, romId, RomId::byteLen); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 825 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 826 | // instert block and page |
| IanBenzMaxim | 25:bdb1c5a53b58 | 827 | MT[11] = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 828 | MT[10] = newProtection & 0x0F; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 829 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 830 | MT[9] = manId[0]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 831 | MT[8] = manId[1]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 832 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 833 | // old data |
| IanBenzMaxim | 25:bdb1c5a53b58 | 834 | MT[12] = (oldProtection & PROT_BIT_AUTHWRITE) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 835 | MT[13] = (oldProtection & PROT_BIT_EPROM) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 836 | MT[14] = (oldProtection & PROT_BIT_WRITE) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 837 | MT[15] = (oldProtection & PROT_BIT_READ) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 838 | // new data |
| IanBenzMaxim | 25:bdb1c5a53b58 | 839 | MT[16] = (newProtection & PROT_BIT_AUTHWRITE) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 840 | MT[17] = (newProtection & PROT_BIT_EPROM) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 841 | MT[18] = (newProtection & PROT_BIT_WRITE) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 842 | MT[19] = (newProtection & PROT_BIT_READ) ? 0x01 : 0x00; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 843 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 844 | // compute the mac |
| IanBenzMaxim | 33:a4c015046956 | 845 | return MacCoproc.computeWriteMac(MT, mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 846 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 847 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 848 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 849 | // Write a 4 byte memory block using an authenticated write (with MAC). |
| IanBenzMaxim | 25:bdb1c5a53b58 | 850 | // The block location is selected by the |
| IanBenzMaxim | 25:bdb1c5a53b58 | 851 | // page number and offset block within the page. Multiple blocks can |
| IanBenzMaxim | 25:bdb1c5a53b58 | 852 | // be programmed without re-selecting the device using the continue flag. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 853 | // This function does not use the Authenticated Write operation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 854 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 855 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 856 | // page - page number where the block to write is located (0 to 15) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 857 | // block - block number in page (0 to 7) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 858 | // new_data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 859 | // old_data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 860 | // manid - 2 byte buffer containing the manufacturer ID (general device: 00h,00h) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 861 | // contflag - Flag to indicate the write is continued from the last |
| IanBenzMaxim | 25:bdb1c5a53b58 | 862 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 863 | // Returns: true - block written |
| IanBenzMaxim | 25:bdb1c5a53b58 | 864 | // false - Failed to write block (no presence or invalid CRC16) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 865 | // |
| IanBenzMaxim | 33:a4c015046956 | 866 | 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 | 867 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 868 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 869 | int cnt, offset; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 870 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 871 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 872 | offset = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 873 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 874 | // check if not continuing a previous block write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 875 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 876 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 877 | buf[cnt++] = CMD_WRITE_AUTH_MEMORY; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 878 | buf[cnt++] = (segmentNum << 5) | pageNum; // address |
| IanBenzMaxim | 25:bdb1c5a53b58 | 879 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 880 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 881 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 882 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 883 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 884 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 885 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 886 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 887 | offset = cnt; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 888 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 889 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 890 | // add the data |
| IanBenzMaxim | 33:a4c015046956 | 891 | for (size_t i = 0; i < newData.length; i++) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 892 | buf[cnt++] = newData[i]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 893 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 894 | // Send data |
| IanBenzMaxim | 33:a4c015046956 | 895 | m_OW_master.OWWriteBlock(newData, newData.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 896 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 897 | // read first CRC byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 898 | m_OW_master.OWReadByte(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 899 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 900 | // read the last CRC and enable power |
| IanBenzMaxim | 25:bdb1c5a53b58 | 901 | m_OW_master.OWReadBytePower(buf[cnt++]); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 902 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 903 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 904 | wait_ms(SHA_COMPUTATION_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 905 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 906 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 907 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 908 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 909 | // check the first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 910 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 911 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 912 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 913 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 914 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 915 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 916 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 917 | unsigned short CRC16 = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 918 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 919 | // DS28E25/DS28E22, crc gets calculagted with CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 920 | if ((romId.familyCode() == DS28E25_FAMILY) || (romId.familyCode() == DS28E22_FAMILY)) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 921 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 922 | if (continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 923 | CRC16 = OneWireMaster::calculateCRC16(CRC16, 0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 924 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 925 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 926 | CRC16 = OneWireMaster::calculateCRC16(buf, offset, (cnt - offset), CRC16); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 927 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 928 | if (CRC16 != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 929 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 930 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 931 | // compute the mac |
| IanBenzMaxim | 25:bdb1c5a53b58 | 932 | ISha256MacCoprocessor::CmdResult result; |
| IanBenzMaxim | 33:a4c015046956 | 933 | Mac mac; |
| IanBenzMaxim | 33:a4c015046956 | 934 | result = CalculateSegmentWriteMAC256(MacCoproc, pageNum, segmentNum, newData, oldData, romId, manId, mac); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 935 | if (result != ISha256MacCoprocessor::Success) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 936 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 937 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 938 | // transmit MAC as a block |
| IanBenzMaxim | 33:a4c015046956 | 939 | m_OW_master.OWWriteBlock(mac, mac.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 940 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 941 | // calculate CRC on MAC |
| IanBenzMaxim | 33:a4c015046956 | 942 | CRC16 = OneWireMaster::calculateCRC16(mac, 0, mac.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 943 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 944 | // append read of CRC16 and CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 945 | m_OW_master.OWReadBlock(&buf[0], 3); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 946 | cnt = 3; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 947 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 948 | // ckeck CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 949 | CRC16 = OneWireMaster::calculateCRC16(buf, 0, (cnt - 1), CRC16); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 950 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 951 | if (CRC16 != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 952 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 953 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 954 | // check CS |
| IanBenzMaxim | 25:bdb1c5a53b58 | 955 | if (buf[cnt-1] != 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 956 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 957 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 958 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 959 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 960 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 961 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 962 | wait_ms(EEPROM_WRITE_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 963 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 964 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 965 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 966 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 967 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 968 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 969 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 970 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 971 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 972 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 973 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 974 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 975 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 976 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 977 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 978 | |
| IanBenzMaxim | 33:a4c015046956 | 979 | OneWireSlave::CmdResult DS28E15_22_25::readSegment(unsigned int page, unsigned int segment, Segment & data) const |
| IanBenzMaxim | 25:bdb1c5a53b58 | 980 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 981 | OneWireMaster::CmdResult result; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 982 | std::uint8_t buf[2]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 983 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 984 | buf[0] = CMD_READ_MEMORY; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 985 | buf[1] = (segment << 5) | page; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 986 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 987 | // Transmit command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 988 | m_OW_master.OWWriteBlock(buf, 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 989 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 990 | // Receive CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 991 | result = m_OW_master.OWReadBlock(buf, 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 992 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 993 | // Receive data |
| IanBenzMaxim | 25:bdb1c5a53b58 | 994 | if (result == OneWireMaster::Success) |
| IanBenzMaxim | 33:a4c015046956 | 995 | result = m_OW_master.OWReadBlock(data, data.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 996 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 997 | return (result == OneWireMaster::Success ? OneWireSlave::Success : OneWireSlave::CommunicationError); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 998 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 999 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1000 | //-------------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1001 | // Write a 4 byte memory block. The block location is selected by the |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1002 | // page number and offset blcok within the page. Multiple blocks can |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1003 | // be programmed without re-selecting the device using the continue flag. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1004 | // This function does not use the Authenticated Write operation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1005 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1006 | // Parameters |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1007 | // page - page number where the block to write is located (0 to 15) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1008 | // block - block number in page (0 to 7) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1009 | // data - 4 byte buffer containing the data to write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1010 | // contflag - Flag to indicate the write is continued from the last |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1011 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1012 | // Returns: true - block written |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1013 | // false - Failed to write block (no presence or invalid CRC16) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1014 | // |
| IanBenzMaxim | 33:a4c015046956 | 1015 | OneWireSlave::CmdResult DS28E15_22_25::writeSegment(unsigned int page, unsigned int block, const Segment & data, bool continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1016 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1017 | std::uint8_t buf[256], cs; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1018 | int cnt, offset; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1019 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1020 | cnt = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1021 | offset = 0; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1022 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1023 | // check if not continuing a previous block write |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1024 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1025 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1026 | buf[cnt++] = CMD_WRITE_MEMORY; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1027 | buf[cnt++] = (block << 5) | page; // address |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1028 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1029 | // Send command |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1030 | m_OW_master.OWWriteBlock(&buf[0], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1031 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1032 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1033 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1034 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1035 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1036 | offset = cnt; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1037 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1038 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1039 | // add the data |
| IanBenzMaxim | 33:a4c015046956 | 1040 | for (size_t i = 0; i < data.length; i++) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1041 | buf[cnt++] = data[i]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1042 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1043 | // Send data |
| IanBenzMaxim | 33:a4c015046956 | 1044 | m_OW_master.OWWriteBlock(data, data.length); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1045 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1046 | // Read CRC |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1047 | m_OW_master.OWReadBlock(&buf[cnt], 2); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1048 | cnt += 2; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1049 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1050 | // check the first CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1051 | if (!continuing) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1052 | { |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1053 | if (OneWireMaster::calculateCRC16(buf, 0, offset) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1054 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1055 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1056 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1057 | // check the second CRC16 |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1058 | if (OneWireMaster::calculateCRC16(buf, offset, (cnt - offset)) != 0xB001) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1059 | return CommunicationError; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1060 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1061 | // send release and strong pull-up |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1062 | m_OW_master.OWWriteBytePower(0xAA); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1063 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1064 | // now wait for the MAC computation. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1065 | wait_ms(EEPROM_WRITE_DELAY); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1066 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1067 | // disable strong pullup |
| IanBenzMaxim | 32:bce180b544ed | 1068 | m_OW_master.OWSetLevel(OneWireMaster::LEVEL_NORMAL); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1069 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1070 | // read the CS byte |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1071 | m_OW_master.OWReadByte(cs); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1072 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1073 | if (cs == 0xAA) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1074 | return Success; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1075 | // else |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1076 | return OperationFailure; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1077 | } |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1078 | |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1079 | //---------------------------------------------------------------------- |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1080 | // Performs a Compute Next SHA-256 calculation given the provided 32-bytes |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1081 | // of binding data and 8 byte partial secret. The first 8 bytes of the |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1082 | // resulting MAC is set as the new secret. |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1083 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1084 | // 'binding' - 32 byte buffer containing the binding data |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1085 | // 'partial' - 8 byte buffer with new partial secret |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1086 | // 'page_num' - page number that the compute is calculated on |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1087 | // 'manid' - manufacturer ID |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1088 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1089 | // Globals used : SECRET used in calculation and set to new secret |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1090 | // |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1091 | // Returns: true if compute successful |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1092 | // false failed to do compute |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1093 | // |
| IanBenzMaxim | 33:a4c015046956 | 1094 | ISha256MacCoprocessor::CmdResult DS28E15_22_25::CalculateNextSecret(ISha256MacCoprocessor & MacCoproc, const Page & binding, const Scratchpad & partial, const RomId & romId, const ManId & manId, unsigned int pageNum) |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1095 | { |
| IanBenzMaxim | 33:a4c015046956 | 1096 | ISha256MacCoprocessor::SlaveSecretData slaveSecretData; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1097 | |
| IanBenzMaxim | 33:a4c015046956 | 1098 | // insert ROM number |
| IanBenzMaxim | 33:a4c015046956 | 1099 | std::memcpy(slaveSecretData, romId, RomId::byteLen); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1100 | |
| IanBenzMaxim | 33:a4c015046956 | 1101 | slaveSecretData[11] = 0x00; |
| IanBenzMaxim | 33:a4c015046956 | 1102 | slaveSecretData[10] = pageNum; |
| IanBenzMaxim | 33:a4c015046956 | 1103 | slaveSecretData[9] = manId[0]; |
| IanBenzMaxim | 33:a4c015046956 | 1104 | slaveSecretData[8] = manId[1]; |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1105 | |
| IanBenzMaxim | 33:a4c015046956 | 1106 | return MacCoproc.computeSlaveSecret(binding, partial, slaveSecretData); |
| IanBenzMaxim | 25:bdb1c5a53b58 | 1107 | } |