Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
OneWire_Masters/DS2465/DS2465.cpp@27:d5aaefa252f1, 2016-03-25 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Fri Mar 25 11:11:59 2016 -0500
- Revision:
- 27:d5aaefa252f1
- Parent:
- 26:a361e3f42ba5
- 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 | 21:00c94aeb533e | 1 | #include "DS2465.hpp" |
IanBenzMaxim | 27:d5aaefa252f1 | 2 | #include "RomId.hpp" |
IanBenzMaxim | 27:d5aaefa252f1 | 3 | #include "mbed.h" |
IanBenzMaxim | 21:00c94aeb533e | 4 | |
IanBenzMaxim | 21:00c94aeb533e | 5 | #define I2C_WRITE 0 |
IanBenzMaxim | 21:00c94aeb533e | 6 | #define I2C_READ 1 |
IanBenzMaxim | 21:00c94aeb533e | 7 | |
IanBenzMaxim | 21:00c94aeb533e | 8 | // DS2465 commands |
IanBenzMaxim | 21:00c94aeb533e | 9 | #define CMD_1WMR 0xF0 |
IanBenzMaxim | 21:00c94aeb533e | 10 | #define CMD_WCFG 0xD2 |
IanBenzMaxim | 21:00c94aeb533e | 11 | #define CMD_CHSL 0xC3 |
IanBenzMaxim | 21:00c94aeb533e | 12 | #define CMD_SRP 0xE1 |
IanBenzMaxim | 21:00c94aeb533e | 13 | |
IanBenzMaxim | 21:00c94aeb533e | 14 | #define CMD_1WRS 0xB4 |
IanBenzMaxim | 21:00c94aeb533e | 15 | #define CMD_1WWB 0xA5 |
IanBenzMaxim | 21:00c94aeb533e | 16 | #define CMD_1WRB 0x96 |
IanBenzMaxim | 21:00c94aeb533e | 17 | #define CMD_1WSB 0x87 |
IanBenzMaxim | 21:00c94aeb533e | 18 | #define CMD_1WT 0x78 |
IanBenzMaxim | 21:00c94aeb533e | 19 | #define CMD_1WTB 0x69 |
IanBenzMaxim | 21:00c94aeb533e | 20 | #define CMD_1WRF 0xE1 |
IanBenzMaxim | 21:00c94aeb533e | 21 | #define CMD_CPS 0x5A |
IanBenzMaxim | 21:00c94aeb533e | 22 | #define CMD_CSS 0x4B |
IanBenzMaxim | 21:00c94aeb533e | 23 | #define CMD_CSAM 0x3C |
IanBenzMaxim | 21:00c94aeb533e | 24 | #define CMD_CSWM 0x2D |
IanBenzMaxim | 21:00c94aeb533e | 25 | #define CMD_CNMS 0x1E |
IanBenzMaxim | 21:00c94aeb533e | 26 | #define CMD_SPR 0x0F |
IanBenzMaxim | 21:00c94aeb533e | 27 | |
IanBenzMaxim | 21:00c94aeb533e | 28 | // DS2465 status bits |
IanBenzMaxim | 21:00c94aeb533e | 29 | #define STATUS_1WB 0x01 |
IanBenzMaxim | 21:00c94aeb533e | 30 | #define STATUS_PPD 0x02 |
IanBenzMaxim | 21:00c94aeb533e | 31 | #define STATUS_SD 0x04 |
IanBenzMaxim | 21:00c94aeb533e | 32 | #define STATUS_LL 0x08 |
IanBenzMaxim | 21:00c94aeb533e | 33 | #define STATUS_RST 0x10 |
IanBenzMaxim | 21:00c94aeb533e | 34 | #define STATUS_SBR 0x20 |
IanBenzMaxim | 21:00c94aeb533e | 35 | #define STATUS_TSB 0x40 |
IanBenzMaxim | 21:00c94aeb533e | 36 | #define STATUS_DIR 0x80 |
IanBenzMaxim | 21:00c94aeb533e | 37 | |
IanBenzMaxim | 21:00c94aeb533e | 38 | // delays (if not polling for complete) |
IanBenzMaxim | 21:00c94aeb533e | 39 | #define EEPROM_WRITE_DELAY 30 |
IanBenzMaxim | 21:00c94aeb533e | 40 | #define LOAD_SECRET_DELAY 90 |
IanBenzMaxim | 21:00c94aeb533e | 41 | #define SHA_COMPUTATION_DELAY 5 |
IanBenzMaxim | 21:00c94aeb533e | 42 | |
IanBenzMaxim | 21:00c94aeb533e | 43 | static const int I2C_WRITE_OK = 0; |
IanBenzMaxim | 21:00c94aeb533e | 44 | |
IanBenzMaxim | 24:8942d8478d68 | 45 | |
IanBenzMaxim | 24:8942d8478d68 | 46 | std::uint8_t DS2465::Config::readByte() const |
IanBenzMaxim | 24:8942d8478d68 | 47 | { |
IanBenzMaxim | 24:8942d8478d68 | 48 | std::uint8_t config = 0; |
IanBenzMaxim | 24:8942d8478d68 | 49 | if (c1WS) |
IanBenzMaxim | 24:8942d8478d68 | 50 | config |= 0x08; |
IanBenzMaxim | 24:8942d8478d68 | 51 | if (cSPU) |
IanBenzMaxim | 24:8942d8478d68 | 52 | config |= 0x04; |
IanBenzMaxim | 24:8942d8478d68 | 53 | if (cPDN) |
IanBenzMaxim | 24:8942d8478d68 | 54 | config |= 0x02; |
IanBenzMaxim | 24:8942d8478d68 | 55 | if (cAPU) |
IanBenzMaxim | 24:8942d8478d68 | 56 | config |= 0x01; |
IanBenzMaxim | 24:8942d8478d68 | 57 | return config; |
IanBenzMaxim | 24:8942d8478d68 | 58 | } |
IanBenzMaxim | 24:8942d8478d68 | 59 | |
IanBenzMaxim | 24:8942d8478d68 | 60 | std::uint8_t DS2465::Config::writeByte() const |
IanBenzMaxim | 24:8942d8478d68 | 61 | { |
IanBenzMaxim | 24:8942d8478d68 | 62 | std::uint8_t config = readByte(); |
IanBenzMaxim | 24:8942d8478d68 | 63 | return ((~config << 4) | config); |
IanBenzMaxim | 24:8942d8478d68 | 64 | } |
IanBenzMaxim | 24:8942d8478d68 | 65 | |
IanBenzMaxim | 24:8942d8478d68 | 66 | void DS2465::Config::reset() |
IanBenzMaxim | 24:8942d8478d68 | 67 | { |
IanBenzMaxim | 24:8942d8478d68 | 68 | c1WS = cSPU = cPDN = false; |
IanBenzMaxim | 24:8942d8478d68 | 69 | cAPU = true; |
IanBenzMaxim | 24:8942d8478d68 | 70 | } |
IanBenzMaxim | 24:8942d8478d68 | 71 | |
IanBenzMaxim | 24:8942d8478d68 | 72 | |
IanBenzMaxim | 24:8942d8478d68 | 73 | |
IanBenzMaxim | 24:8942d8478d68 | 74 | |
IanBenzMaxim | 21:00c94aeb533e | 75 | DS2465::DS2465(I2C & I2C_interface, unsigned char I2C_address) |
IanBenzMaxim | 21:00c94aeb533e | 76 | : m_I2C_interface(I2C_interface), m_I2C_address(I2C_address) |
IanBenzMaxim | 21:00c94aeb533e | 77 | { |
IanBenzMaxim | 21:00c94aeb533e | 78 | |
IanBenzMaxim | 21:00c94aeb533e | 79 | } |
IanBenzMaxim | 21:00c94aeb533e | 80 | |
IanBenzMaxim | 21:00c94aeb533e | 81 | |
IanBenzMaxim | 21:00c94aeb533e | 82 | |
IanBenzMaxim | 21:00c94aeb533e | 83 | |
IanBenzMaxim | 21:00c94aeb533e | 84 | OneWireMaster::CmdResult DS2465::OWInitMaster() |
IanBenzMaxim | 21:00c94aeb533e | 85 | { |
IanBenzMaxim | 21:00c94aeb533e | 86 | return Detect(); |
IanBenzMaxim | 21:00c94aeb533e | 87 | } |
IanBenzMaxim | 21:00c94aeb533e | 88 | |
IanBenzMaxim | 21:00c94aeb533e | 89 | |
IanBenzMaxim | 21:00c94aeb533e | 90 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 91 | // Compute Next Master Secret DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 92 | // |
IanBenzMaxim | 21:00c94aeb533e | 93 | // 'swap' - 1 if swapping a page into the computation |
IanBenzMaxim | 21:00c94aeb533e | 94 | // 'page' - page number to swap in |
IanBenzMaxim | 21:00c94aeb533e | 95 | // 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page |
IanBenzMaxim | 21:00c94aeb533e | 96 | // |
IanBenzMaxim | 21:00c94aeb533e | 97 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 98 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 99 | // |
IanBenzMaxim | 21:00c94aeb533e | 100 | OneWireMaster::CmdResult DS2465::Compute_NextMasterSecret(bool swap, unsigned int pageNum, PageRegion region) |
IanBenzMaxim | 21:00c94aeb533e | 101 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 102 | std::uint8_t command[2] = { CMD_CNMS, (swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 24:8942d8478d68 | 103 | return WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 104 | } |
IanBenzMaxim | 21:00c94aeb533e | 105 | |
IanBenzMaxim | 21:00c94aeb533e | 106 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 107 | // Compute Write MAC DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 108 | // |
IanBenzMaxim | 21:00c94aeb533e | 109 | // 'regwrite' - true if writing to a register, false if regular memory |
IanBenzMaxim | 21:00c94aeb533e | 110 | // 'swap' - true if swapping a page into the computation |
IanBenzMaxim | 21:00c94aeb533e | 111 | // 'page' - page number to swap in |
IanBenzMaxim | 21:00c94aeb533e | 112 | // 'segment' - segment number if swaping |
IanBenzMaxim | 21:00c94aeb533e | 113 | // |
IanBenzMaxim | 21:00c94aeb533e | 114 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 115 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 116 | // |
IanBenzMaxim | 21:00c94aeb533e | 117 | OneWireMaster::CmdResult DS2465::Compute_WriteMAC(bool regwrite, bool swap, unsigned int pageNum, unsigned int segmentNum) const |
IanBenzMaxim | 21:00c94aeb533e | 118 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 119 | std::uint8_t command[2] = { CMD_CSWM, ((regwrite << 7) | (swap << 6) | (pageNum << 4) | segmentNum) }; |
IanBenzMaxim | 24:8942d8478d68 | 120 | return CWriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 121 | } |
IanBenzMaxim | 21:00c94aeb533e | 122 | |
IanBenzMaxim | 21:00c94aeb533e | 123 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 124 | // Compute Slave Authentication MAC DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 125 | // |
IanBenzMaxim | 21:00c94aeb533e | 126 | // 'swap' - true if swapping a page into the computation |
IanBenzMaxim | 21:00c94aeb533e | 127 | // 'page' - page number to swap in |
IanBenzMaxim | 21:00c94aeb533e | 128 | // 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page |
IanBenzMaxim | 21:00c94aeb533e | 129 | // |
IanBenzMaxim | 21:00c94aeb533e | 130 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 131 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 132 | // |
IanBenzMaxim | 21:00c94aeb533e | 133 | OneWireMaster::CmdResult DS2465::Compute_AuthMAC(bool swap, unsigned int pageNum, PageRegion region) const |
IanBenzMaxim | 21:00c94aeb533e | 134 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 135 | std::uint8_t command[2] = { CMD_CSAM, (swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 24:8942d8478d68 | 136 | return CWriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 137 | } |
IanBenzMaxim | 21:00c94aeb533e | 138 | |
IanBenzMaxim | 21:00c94aeb533e | 139 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 140 | // Compute S-Secret on DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 141 | // |
IanBenzMaxim | 21:00c94aeb533e | 142 | // 'swap' - true if swapping a page into the computation |
IanBenzMaxim | 21:00c94aeb533e | 143 | // 'page' - page number to swap in |
IanBenzMaxim | 21:00c94aeb533e | 144 | // 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page |
IanBenzMaxim | 21:00c94aeb533e | 145 | // |
IanBenzMaxim | 21:00c94aeb533e | 146 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 147 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 148 | // |
IanBenzMaxim | 21:00c94aeb533e | 149 | OneWireMaster::CmdResult DS2465::Compute_SSecret(bool swap, unsigned int pageNum, PageRegion region) |
IanBenzMaxim | 21:00c94aeb533e | 150 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 151 | std::uint8_t command[2] = { CMD_CSS, (swap ? (0xC8 | (pageNum << 4) | region) : 0xBF) }; |
IanBenzMaxim | 24:8942d8478d68 | 152 | return WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 153 | } |
IanBenzMaxim | 21:00c94aeb533e | 154 | |
IanBenzMaxim | 21:00c94aeb533e | 155 | |
IanBenzMaxim | 21:00c94aeb533e | 156 | |
IanBenzMaxim | 21:00c94aeb533e | 157 | |
IanBenzMaxim | 21:00c94aeb533e | 158 | ISha256MacCoprocessor::CmdResult DS2465::setMasterSecret(const std::uint8_t (&secret)[secret_len]) |
IanBenzMaxim | 21:00c94aeb533e | 159 | { |
IanBenzMaxim | 21:00c94aeb533e | 160 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 24:8942d8478d68 | 161 | result = WriteMemory(ADDR_SPAD, secret, secret_len); |
IanBenzMaxim | 21:00c94aeb533e | 162 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 163 | result = CopyScratchpad(1, 0, 1, 0); |
IanBenzMaxim | 21:00c94aeb533e | 164 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 165 | wait_ms(8 * EEPROM_WRITE_DELAY); |
IanBenzMaxim | 21:00c94aeb533e | 166 | return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 167 | } |
IanBenzMaxim | 21:00c94aeb533e | 168 | |
IanBenzMaxim | 21:00c94aeb533e | 169 | ISha256MacCoprocessor::CmdResult DS2465::ComputeAndRead_WriteMAC(const std::uint8_t (&WriteMAC_data)[WriteMAC_data_len], std::uint8_t (&mac)[mac_len]) const |
IanBenzMaxim | 21:00c94aeb533e | 170 | { |
IanBenzMaxim | 21:00c94aeb533e | 171 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 21:00c94aeb533e | 172 | // Write input data to scratchpad |
IanBenzMaxim | 24:8942d8478d68 | 173 | result = WriteScratchpad(WriteMAC_data, WriteMAC_data_len); |
IanBenzMaxim | 21:00c94aeb533e | 174 | // Compute MAC |
IanBenzMaxim | 21:00c94aeb533e | 175 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 176 | result = Compute_WriteMAC(false, false, 0, 0); |
IanBenzMaxim | 21:00c94aeb533e | 177 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 178 | { |
IanBenzMaxim | 21:00c94aeb533e | 179 | wait_ms(SHA_COMPUTATION_DELAY); |
IanBenzMaxim | 21:00c94aeb533e | 180 | // Read MAC from register |
IanBenzMaxim | 21:00c94aeb533e | 181 | result = ReadMemory(ADDR_MAC_READ, mac, mac_len, true); |
IanBenzMaxim | 21:00c94aeb533e | 182 | } |
IanBenzMaxim | 21:00c94aeb533e | 183 | return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 184 | } |
IanBenzMaxim | 21:00c94aeb533e | 185 | |
IanBenzMaxim | 21:00c94aeb533e | 186 | ISha256MacCoprocessor::CmdResult DS2465::ComputeAndRead_AuthMAC(const std::uint8_t (&devicePage)[devicePage_len], const std::uint8_t (&challenge)[deviceScratchpad_len], |
IanBenzMaxim | 21:00c94aeb533e | 187 | const std::uint8_t (&AuthMAC_data)[AuthMAC_data_len], std::uint8_t (&mac)[mac_len]) const |
IanBenzMaxim | 21:00c94aeb533e | 188 | { |
IanBenzMaxim | 21:00c94aeb533e | 189 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 21:00c94aeb533e | 190 | int addr = ADDR_SPAD; |
IanBenzMaxim | 21:00c94aeb533e | 191 | // Write input data to scratchpad |
IanBenzMaxim | 24:8942d8478d68 | 192 | result = CWriteMemory(addr, devicePage, devicePage_len); |
IanBenzMaxim | 21:00c94aeb533e | 193 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 194 | { |
IanBenzMaxim | 21:00c94aeb533e | 195 | addr += devicePage_len; |
IanBenzMaxim | 24:8942d8478d68 | 196 | result = CWriteMemory(addr, challenge, deviceScratchpad_len); |
IanBenzMaxim | 21:00c94aeb533e | 197 | } |
IanBenzMaxim | 21:00c94aeb533e | 198 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 199 | { |
IanBenzMaxim | 21:00c94aeb533e | 200 | addr += deviceScratchpad_len; |
IanBenzMaxim | 24:8942d8478d68 | 201 | result = CWriteMemory(addr, AuthMAC_data, AuthMAC_data_len); |
IanBenzMaxim | 21:00c94aeb533e | 202 | } |
IanBenzMaxim | 21:00c94aeb533e | 203 | // Compute MAC |
IanBenzMaxim | 21:00c94aeb533e | 204 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 205 | result = Compute_AuthMAC(false, 0, REGION_FULL_PAGE); |
IanBenzMaxim | 21:00c94aeb533e | 206 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 207 | { |
IanBenzMaxim | 21:00c94aeb533e | 208 | wait_ms(SHA_COMPUTATION_DELAY * 2); |
IanBenzMaxim | 21:00c94aeb533e | 209 | // Read MAC from register |
IanBenzMaxim | 21:00c94aeb533e | 210 | result = ReadMemory(ADDR_MAC_READ, mac, mac_len, true); |
IanBenzMaxim | 21:00c94aeb533e | 211 | } |
IanBenzMaxim | 21:00c94aeb533e | 212 | return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 213 | } |
IanBenzMaxim | 21:00c94aeb533e | 214 | |
IanBenzMaxim | 21:00c94aeb533e | 215 | ISha256MacCoprocessor::CmdResult DS2465::Compute_SSecret(const unsigned char (&devicePage)[devicePage_len], const unsigned char (&deviceScratchpad)[deviceScratchpad_len], |
IanBenzMaxim | 21:00c94aeb533e | 216 | const unsigned char (&SSecret_data)[SSecret_data_len]) |
IanBenzMaxim | 21:00c94aeb533e | 217 | { |
IanBenzMaxim | 21:00c94aeb533e | 218 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 21:00c94aeb533e | 219 | int addr = ADDR_SPAD; |
IanBenzMaxim | 21:00c94aeb533e | 220 | // Write input data to scratchpad |
IanBenzMaxim | 24:8942d8478d68 | 221 | result = WriteMemory(addr, devicePage, devicePage_len); |
IanBenzMaxim | 21:00c94aeb533e | 222 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 223 | { |
IanBenzMaxim | 21:00c94aeb533e | 224 | addr += devicePage_len; |
IanBenzMaxim | 24:8942d8478d68 | 225 | result = WriteMemory(addr, deviceScratchpad, deviceScratchpad_len); |
IanBenzMaxim | 21:00c94aeb533e | 226 | } |
IanBenzMaxim | 21:00c94aeb533e | 227 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 228 | { |
IanBenzMaxim | 21:00c94aeb533e | 229 | addr += deviceScratchpad_len; |
IanBenzMaxim | 24:8942d8478d68 | 230 | result = WriteMemory(addr, SSecret_data, SSecret_data_len); |
IanBenzMaxim | 21:00c94aeb533e | 231 | } |
IanBenzMaxim | 21:00c94aeb533e | 232 | // Compute secret |
IanBenzMaxim | 21:00c94aeb533e | 233 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 234 | result = Compute_SSecret(false, 0, REGION_FULL_PAGE); |
IanBenzMaxim | 21:00c94aeb533e | 235 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 236 | wait_ms(SHA_COMPUTATION_DELAY * 2); |
IanBenzMaxim | 21:00c94aeb533e | 237 | return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure); |
IanBenzMaxim | 21:00c94aeb533e | 238 | } |
IanBenzMaxim | 21:00c94aeb533e | 239 | |
IanBenzMaxim | 21:00c94aeb533e | 240 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 241 | // Copy Scratchpad on DS2465 to either secret or memory page |
IanBenzMaxim | 21:00c94aeb533e | 242 | // |
IanBenzMaxim | 21:00c94aeb533e | 243 | // 'dest_secret' - 1 if destination is secret, 0 if memory page |
IanBenzMaxim | 21:00c94aeb533e | 244 | // 'page' - page number if dest_secret=0 |
IanBenzMaxim | 21:00c94aeb533e | 245 | // 'notfull' - 0 if only 4 byte segment, 1 if writing to full page, |
IanBenzMaxim | 21:00c94aeb533e | 246 | // 'seg' - Segment number if full=0. |
IanBenzMaxim | 21:00c94aeb533e | 247 | // |
IanBenzMaxim | 21:00c94aeb533e | 248 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 249 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 250 | // |
IanBenzMaxim | 21:00c94aeb533e | 251 | OneWireMaster::CmdResult DS2465::CopyScratchpad(bool dest_secret, unsigned int pageNum, bool notFull, unsigned int segmentNum) |
IanBenzMaxim | 21:00c94aeb533e | 252 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 253 | std::uint8_t command[2] = { CMD_CPS, (dest_secret ? 0 : (0x80 | (pageNum << 4) | (notFull << 3) | segmentNum)) }; |
IanBenzMaxim | 24:8942d8478d68 | 254 | return WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 255 | } |
IanBenzMaxim | 21:00c94aeb533e | 256 | |
IanBenzMaxim | 21:00c94aeb533e | 257 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 258 | // APU enable or disable |
IanBenzMaxim | 21:00c94aeb533e | 259 | // |
IanBenzMaxim | 21:00c94aeb533e | 260 | // 'readflag' - 1 if reading current configuration |
IanBenzMaxim | 21:00c94aeb533e | 261 | // 'apu_enable' - 1 to enable |
IanBenzMaxim | 21:00c94aeb533e | 262 | // |
IanBenzMaxim | 21:00c94aeb533e | 263 | // Returns: true if write successful, or return configuration value if reading |
IanBenzMaxim | 21:00c94aeb533e | 264 | // |
IanBenzMaxim | 21:00c94aeb533e | 265 | OneWireMaster::CmdResult DS2465::ConfigureAPU(bool apu_enable) |
IanBenzMaxim | 21:00c94aeb533e | 266 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 267 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 26:a361e3f42ba5 | 268 | if (m_curConfig.cAPU != apu_enable) |
IanBenzMaxim | 26:a361e3f42ba5 | 269 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 270 | m_curConfig.cAPU = apu_enable; |
IanBenzMaxim | 26:a361e3f42ba5 | 271 | result = WriteConfig(m_curConfig); |
IanBenzMaxim | 26:a361e3f42ba5 | 272 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 273 | else |
IanBenzMaxim | 26:a361e3f42ba5 | 274 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 275 | result = OneWireMaster::Success; |
IanBenzMaxim | 26:a361e3f42ba5 | 276 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 277 | return result; |
IanBenzMaxim | 26:a361e3f42ba5 | 278 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 279 | |
IanBenzMaxim | 21:00c94aeb533e | 280 | |
IanBenzMaxim | 26:a361e3f42ba5 | 281 | |
IanBenzMaxim | 26:a361e3f42ba5 | 282 | OneWireMaster::CmdResult DS2465::ConfigureSPU(bool spu_enable) |
IanBenzMaxim | 26:a361e3f42ba5 | 283 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 284 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 26:a361e3f42ba5 | 285 | if (m_curConfig.cSPU != spu_enable) |
IanBenzMaxim | 26:a361e3f42ba5 | 286 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 287 | m_curConfig.cSPU = spu_enable; |
IanBenzMaxim | 26:a361e3f42ba5 | 288 | result = WriteConfig(m_curConfig); |
IanBenzMaxim | 26:a361e3f42ba5 | 289 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 290 | else |
IanBenzMaxim | 26:a361e3f42ba5 | 291 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 292 | result = OneWireMaster::Success; |
IanBenzMaxim | 26:a361e3f42ba5 | 293 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 294 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 295 | } |
IanBenzMaxim | 21:00c94aeb533e | 296 | |
IanBenzMaxim | 21:00c94aeb533e | 297 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 298 | // Power up 1-Wire using extended function |
IanBenzMaxim | 21:00c94aeb533e | 299 | // |
IanBenzMaxim | 21:00c94aeb533e | 300 | // Returns: true successful |
IanBenzMaxim | 21:00c94aeb533e | 301 | // false failure during communication |
IanBenzMaxim | 21:00c94aeb533e | 302 | // |
IanBenzMaxim | 26:a361e3f42ba5 | 303 | OneWireMaster::CmdResult DS2465::ConfigurePowerDown(bool pdn_enable) |
IanBenzMaxim | 21:00c94aeb533e | 304 | { |
IanBenzMaxim | 21:00c94aeb533e | 305 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 26:a361e3f42ba5 | 306 | if (m_curConfig.cPDN != pdn_enable) |
IanBenzMaxim | 21:00c94aeb533e | 307 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 308 | m_curConfig.cPDN = pdn_enable; |
IanBenzMaxim | 26:a361e3f42ba5 | 309 | result = WriteConfig(m_curConfig); |
IanBenzMaxim | 26:a361e3f42ba5 | 310 | if (!pdn_enable) |
IanBenzMaxim | 26:a361e3f42ba5 | 311 | wait_ms(2); // Delay 2ms to allow units to power up |
IanBenzMaxim | 21:00c94aeb533e | 312 | } |
IanBenzMaxim | 26:a361e3f42ba5 | 313 | else |
IanBenzMaxim | 26:a361e3f42ba5 | 314 | { |
IanBenzMaxim | 26:a361e3f42ba5 | 315 | result = OneWireMaster::Success; |
IanBenzMaxim | 26:a361e3f42ba5 | 316 | } |
IanBenzMaxim | 21:00c94aeb533e | 317 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 318 | } |
IanBenzMaxim | 21:00c94aeb533e | 319 | |
IanBenzMaxim | 21:00c94aeb533e | 320 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 321 | // Set the 1-Wire Net line level pull-up to normal. The DS2465 does only |
IanBenzMaxim | 21:00c94aeb533e | 322 | // allows enabling strong pull-up on a bit or byte event. Consequently this |
IanBenzMaxim | 21:00c94aeb533e | 323 | // function only allows the MODE_STANDARD argument. To enable strong pull-up |
IanBenzMaxim | 21:00c94aeb533e | 324 | // use OWWriteBytePower or OWReadBitPower. |
IanBenzMaxim | 21:00c94aeb533e | 325 | // |
IanBenzMaxim | 21:00c94aeb533e | 326 | // 'new_level' - new level defined as |
IanBenzMaxim | 21:00c94aeb533e | 327 | // MODE_STANDARD 0x00 |
IanBenzMaxim | 21:00c94aeb533e | 328 | // |
IanBenzMaxim | 21:00c94aeb533e | 329 | // Returns: current 1-Wire Net level |
IanBenzMaxim | 21:00c94aeb533e | 330 | // |
IanBenzMaxim | 21:00c94aeb533e | 331 | OneWireMaster::CmdResult DS2465::OWLevel(OW_LEVEL new_level) |
IanBenzMaxim | 21:00c94aeb533e | 332 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 333 | // function only will turn back to non-strong pull-up |
IanBenzMaxim | 27:d5aaefa252f1 | 334 | if (new_level != LEVEL_NORMAL) |
IanBenzMaxim | 27:d5aaefa252f1 | 335 | return OneWireMaster::OperationFailure; |
IanBenzMaxim | 27:d5aaefa252f1 | 336 | |
IanBenzMaxim | 27:d5aaefa252f1 | 337 | // Requested level is already set |
IanBenzMaxim | 27:d5aaefa252f1 | 338 | if (!m_curConfig.cSPU) |
IanBenzMaxim | 27:d5aaefa252f1 | 339 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 340 | |
IanBenzMaxim | 27:d5aaefa252f1 | 341 | // clear the strong pull-up bit in the global config state |
IanBenzMaxim | 27:d5aaefa252f1 | 342 | m_curConfig.cSPU = false; |
IanBenzMaxim | 21:00c94aeb533e | 343 | |
IanBenzMaxim | 27:d5aaefa252f1 | 344 | // write the new config |
IanBenzMaxim | 27:d5aaefa252f1 | 345 | return WriteConfig(m_curConfig); |
IanBenzMaxim | 21:00c94aeb533e | 346 | } |
IanBenzMaxim | 21:00c94aeb533e | 347 | |
IanBenzMaxim | 21:00c94aeb533e | 348 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 349 | // Set the 1-Wire Net communication speed. |
IanBenzMaxim | 21:00c94aeb533e | 350 | // |
IanBenzMaxim | 21:00c94aeb533e | 351 | // 'new_speed' - new speed defined as |
IanBenzMaxim | 21:00c94aeb533e | 352 | // MODE_STANDARD 0x00 |
IanBenzMaxim | 21:00c94aeb533e | 353 | // MODE_OVERDRIVE 0x01 |
IanBenzMaxim | 21:00c94aeb533e | 354 | // |
IanBenzMaxim | 21:00c94aeb533e | 355 | // Returns: current 1-Wire Net speed |
IanBenzMaxim | 21:00c94aeb533e | 356 | // |
IanBenzMaxim | 21:00c94aeb533e | 357 | OneWireMaster::CmdResult DS2465::OWSpeed(OW_SPEED new_speed) |
IanBenzMaxim | 21:00c94aeb533e | 358 | { |
IanBenzMaxim | 27:d5aaefa252f1 | 359 | // Requested speed is already set |
IanBenzMaxim | 27:d5aaefa252f1 | 360 | if (m_curConfig.c1WS == (new_speed == SPEED_OVERDRIVE)) |
IanBenzMaxim | 27:d5aaefa252f1 | 361 | return OneWireMaster::Success; |
IanBenzMaxim | 27:d5aaefa252f1 | 362 | |
IanBenzMaxim | 27:d5aaefa252f1 | 363 | // set the speed |
IanBenzMaxim | 27:d5aaefa252f1 | 364 | m_curConfig.c1WS = (new_speed == SPEED_OVERDRIVE); |
IanBenzMaxim | 21:00c94aeb533e | 365 | |
IanBenzMaxim | 27:d5aaefa252f1 | 366 | // write the new config |
IanBenzMaxim | 27:d5aaefa252f1 | 367 | return WriteConfig(m_curConfig); |
IanBenzMaxim | 21:00c94aeb533e | 368 | } |
IanBenzMaxim | 21:00c94aeb533e | 369 | |
IanBenzMaxim | 21:00c94aeb533e | 370 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 371 | // Use the DS2465 help command '1-Wire triplet' to perform one bit of a 1-Wire |
IanBenzMaxim | 21:00c94aeb533e | 372 | // search. This command does two read bits and one write bit. The write bit |
IanBenzMaxim | 21:00c94aeb533e | 373 | // is either the default direction (all device have same bit) or in case of |
IanBenzMaxim | 21:00c94aeb533e | 374 | // a discripancy, the 'search_direction' parameter is used. |
IanBenzMaxim | 21:00c94aeb533e | 375 | // |
j3 | 22:686273e55cdc | 376 | // Returns � The DS2465 status byte result from the triplet command |
IanBenzMaxim | 21:00c94aeb533e | 377 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 378 | OneWireMaster::CmdResult DS2465::Triplet(Direction search_direction, std::uint8_t & status) |
IanBenzMaxim | 21:00c94aeb533e | 379 | { |
IanBenzMaxim | 21:00c94aeb533e | 380 | // 1-Wire Triplet (Case B) |
IanBenzMaxim | 21:00c94aeb533e | 381 | // S AD,0 [A] 1WT [A] SS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 21:00c94aeb533e | 382 | // \--------/ |
IanBenzMaxim | 21:00c94aeb533e | 383 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 21:00c94aeb533e | 384 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 385 | // SS indicates byte containing search direction bit value in msbit |
IanBenzMaxim | 24:8942d8478d68 | 386 | |
IanBenzMaxim | 24:8942d8478d68 | 387 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 388 | std::uint8_t command[2] = { CMD_1WT, ((search_direction == DIRECTION_WRITE_ONE) ? 0x80 : 0x00) }; |
IanBenzMaxim | 24:8942d8478d68 | 389 | result = WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 24:8942d8478d68 | 390 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 391 | result = PollBusy(&status); |
IanBenzMaxim | 24:8942d8478d68 | 392 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 393 | } |
IanBenzMaxim | 21:00c94aeb533e | 394 | |
IanBenzMaxim | 21:00c94aeb533e | 395 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 396 | // The 'OWSearch' function does a general search. This function |
IanBenzMaxim | 21:00c94aeb533e | 397 | // continues from the previos search state. The search state |
IanBenzMaxim | 21:00c94aeb533e | 398 | // can be reset by using the 'OWFirst' function. |
IanBenzMaxim | 21:00c94aeb533e | 399 | // This function contains one parameter 'alarm_only'. |
IanBenzMaxim | 21:00c94aeb533e | 400 | // When 'alarm_only' is true (1) the find alarm command |
IanBenzMaxim | 21:00c94aeb533e | 401 | // 0xEC is sent instead of the normal search command 0xF0. |
IanBenzMaxim | 21:00c94aeb533e | 402 | // Using the find alarm command 0xEC will limit the search to only |
IanBenzMaxim | 21:00c94aeb533e | 403 | // 1-Wire devices that are in an 'alarm' state. |
IanBenzMaxim | 21:00c94aeb533e | 404 | // |
IanBenzMaxim | 21:00c94aeb533e | 405 | // Returns: true (1) : when a 1-Wire device was found and it's |
IanBenzMaxim | 21:00c94aeb533e | 406 | // Serial Number placed in the global ROM |
IanBenzMaxim | 21:00c94aeb533e | 407 | // false (0): when no new device was found. Either the |
IanBenzMaxim | 21:00c94aeb533e | 408 | // last search was the last device or there |
IanBenzMaxim | 21:00c94aeb533e | 409 | // are no devices on the 1-Wire Net. |
IanBenzMaxim | 21:00c94aeb533e | 410 | // |
IanBenzMaxim | 21:00c94aeb533e | 411 | OneWireMaster::CmdResult DS2465::OWSearch(RomId & romId) |
IanBenzMaxim | 21:00c94aeb533e | 412 | { |
IanBenzMaxim | 21:00c94aeb533e | 413 | int id_bit_number; |
IanBenzMaxim | 21:00c94aeb533e | 414 | int last_zero, rom_byte_number; |
IanBenzMaxim | 21:00c94aeb533e | 415 | int id_bit, cmp_id_bit; |
IanBenzMaxim | 21:00c94aeb533e | 416 | unsigned char rom_byte_mask, status; |
IanBenzMaxim | 21:00c94aeb533e | 417 | bool search_result; |
IanBenzMaxim | 21:00c94aeb533e | 418 | unsigned char crc8 = 0; |
IanBenzMaxim | 21:00c94aeb533e | 419 | Direction search_direction; |
IanBenzMaxim | 21:00c94aeb533e | 420 | |
IanBenzMaxim | 21:00c94aeb533e | 421 | // initialize for search |
IanBenzMaxim | 21:00c94aeb533e | 422 | id_bit_number = 1; |
IanBenzMaxim | 21:00c94aeb533e | 423 | last_zero = 0; |
IanBenzMaxim | 21:00c94aeb533e | 424 | rom_byte_number = 0; |
IanBenzMaxim | 21:00c94aeb533e | 425 | rom_byte_mask = 1; |
IanBenzMaxim | 21:00c94aeb533e | 426 | search_result = false; |
IanBenzMaxim | 21:00c94aeb533e | 427 | |
IanBenzMaxim | 21:00c94aeb533e | 428 | // if the last call was not the last one |
IanBenzMaxim | 24:8942d8478d68 | 429 | if (!_last_device_flag) |
IanBenzMaxim | 21:00c94aeb533e | 430 | { |
IanBenzMaxim | 21:00c94aeb533e | 431 | // 1-Wire reset |
IanBenzMaxim | 21:00c94aeb533e | 432 | OneWireMaster::CmdResult result = OWReset(); |
IanBenzMaxim | 21:00c94aeb533e | 433 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 434 | { |
IanBenzMaxim | 21:00c94aeb533e | 435 | // reset the search |
IanBenzMaxim | 24:8942d8478d68 | 436 | _last_discrepancy = 0; |
IanBenzMaxim | 24:8942d8478d68 | 437 | _last_device_flag = false; |
IanBenzMaxim | 24:8942d8478d68 | 438 | _last_family_discrepancy = 0; |
IanBenzMaxim | 21:00c94aeb533e | 439 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 440 | } |
IanBenzMaxim | 21:00c94aeb533e | 441 | |
IanBenzMaxim | 21:00c94aeb533e | 442 | // issue the search command |
IanBenzMaxim | 26:a361e3f42ba5 | 443 | OneWireMaster::OWWriteByte(0xF0); |
IanBenzMaxim | 21:00c94aeb533e | 444 | |
IanBenzMaxim | 21:00c94aeb533e | 445 | // loop to do the search |
IanBenzMaxim | 21:00c94aeb533e | 446 | do |
IanBenzMaxim | 21:00c94aeb533e | 447 | { |
IanBenzMaxim | 21:00c94aeb533e | 448 | // if this discrepancy if before the Last Discrepancy |
IanBenzMaxim | 21:00c94aeb533e | 449 | // on a previous next then pick the same as last time |
IanBenzMaxim | 24:8942d8478d68 | 450 | if (id_bit_number < _last_discrepancy) |
IanBenzMaxim | 21:00c94aeb533e | 451 | { |
IanBenzMaxim | 21:00c94aeb533e | 452 | if ((romId[rom_byte_number] & rom_byte_mask) > 0) |
IanBenzMaxim | 21:00c94aeb533e | 453 | search_direction = DIRECTION_WRITE_ONE; |
IanBenzMaxim | 21:00c94aeb533e | 454 | else |
IanBenzMaxim | 21:00c94aeb533e | 455 | search_direction = DIRECTION_WRITE_ZERO; |
IanBenzMaxim | 21:00c94aeb533e | 456 | } |
IanBenzMaxim | 21:00c94aeb533e | 457 | else |
IanBenzMaxim | 21:00c94aeb533e | 458 | { |
IanBenzMaxim | 21:00c94aeb533e | 459 | // if equal to last pick 1, if not then pick 0 |
IanBenzMaxim | 24:8942d8478d68 | 460 | if (id_bit_number == _last_discrepancy) |
IanBenzMaxim | 21:00c94aeb533e | 461 | search_direction = DIRECTION_WRITE_ONE; |
IanBenzMaxim | 21:00c94aeb533e | 462 | else |
IanBenzMaxim | 21:00c94aeb533e | 463 | search_direction = DIRECTION_WRITE_ZERO; |
IanBenzMaxim | 21:00c94aeb533e | 464 | } |
IanBenzMaxim | 21:00c94aeb533e | 465 | |
IanBenzMaxim | 21:00c94aeb533e | 466 | // Peform a triple operation on the DS2465 which will perform 2 read bits and 1 write bit |
IanBenzMaxim | 21:00c94aeb533e | 467 | Triplet(search_direction, status); |
IanBenzMaxim | 21:00c94aeb533e | 468 | |
IanBenzMaxim | 21:00c94aeb533e | 469 | // check bit results in status byte |
IanBenzMaxim | 21:00c94aeb533e | 470 | id_bit = ((status & STATUS_SBR) == STATUS_SBR); |
IanBenzMaxim | 21:00c94aeb533e | 471 | cmp_id_bit = ((status & STATUS_TSB) == STATUS_TSB); |
IanBenzMaxim | 21:00c94aeb533e | 472 | search_direction = ((status & STATUS_DIR) == STATUS_DIR) ? DIRECTION_WRITE_ONE : DIRECTION_WRITE_ZERO; |
IanBenzMaxim | 21:00c94aeb533e | 473 | |
IanBenzMaxim | 21:00c94aeb533e | 474 | // check for no devices on 1-wire |
IanBenzMaxim | 21:00c94aeb533e | 475 | if ((id_bit) && (cmp_id_bit)) |
IanBenzMaxim | 21:00c94aeb533e | 476 | break; |
IanBenzMaxim | 21:00c94aeb533e | 477 | else |
IanBenzMaxim | 21:00c94aeb533e | 478 | { |
IanBenzMaxim | 21:00c94aeb533e | 479 | if ((!id_bit) && (!cmp_id_bit) && (search_direction == DIRECTION_WRITE_ZERO)) |
IanBenzMaxim | 21:00c94aeb533e | 480 | { |
IanBenzMaxim | 21:00c94aeb533e | 481 | last_zero = id_bit_number; |
IanBenzMaxim | 21:00c94aeb533e | 482 | |
IanBenzMaxim | 21:00c94aeb533e | 483 | // check for Last discrepancy in family |
IanBenzMaxim | 21:00c94aeb533e | 484 | if (last_zero < 9) |
IanBenzMaxim | 24:8942d8478d68 | 485 | _last_family_discrepancy = last_zero; |
IanBenzMaxim | 21:00c94aeb533e | 486 | } |
IanBenzMaxim | 21:00c94aeb533e | 487 | |
IanBenzMaxim | 21:00c94aeb533e | 488 | // set or clear the bit in the ROM byte rom_byte_number |
IanBenzMaxim | 21:00c94aeb533e | 489 | // with mask rom_byte_mask |
IanBenzMaxim | 21:00c94aeb533e | 490 | if (search_direction == DIRECTION_WRITE_ONE) |
IanBenzMaxim | 21:00c94aeb533e | 491 | romId[rom_byte_number] |= rom_byte_mask; |
IanBenzMaxim | 21:00c94aeb533e | 492 | else |
IanBenzMaxim | 21:00c94aeb533e | 493 | romId[rom_byte_number] &= (unsigned char)~rom_byte_mask; |
IanBenzMaxim | 21:00c94aeb533e | 494 | |
IanBenzMaxim | 21:00c94aeb533e | 495 | // increment the byte counter id_bit_number |
IanBenzMaxim | 21:00c94aeb533e | 496 | // and shift the mask rom_byte_mask |
IanBenzMaxim | 21:00c94aeb533e | 497 | id_bit_number++; |
IanBenzMaxim | 21:00c94aeb533e | 498 | rom_byte_mask <<= 1; |
IanBenzMaxim | 21:00c94aeb533e | 499 | |
IanBenzMaxim | 21:00c94aeb533e | 500 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask |
IanBenzMaxim | 21:00c94aeb533e | 501 | if (rom_byte_mask == 0) |
IanBenzMaxim | 21:00c94aeb533e | 502 | { |
IanBenzMaxim | 21:00c94aeb533e | 503 | crc8 = RomId::calculateCRC8(crc8, romId[rom_byte_number]); // accumulate the CRC |
IanBenzMaxim | 21:00c94aeb533e | 504 | rom_byte_number++; |
IanBenzMaxim | 21:00c94aeb533e | 505 | rom_byte_mask = 1; |
IanBenzMaxim | 21:00c94aeb533e | 506 | } |
IanBenzMaxim | 21:00c94aeb533e | 507 | } |
IanBenzMaxim | 21:00c94aeb533e | 508 | } |
IanBenzMaxim | 21:00c94aeb533e | 509 | while(rom_byte_number < RomId::byteLen); // loop until through all ROM bytes 0-7 |
IanBenzMaxim | 21:00c94aeb533e | 510 | |
IanBenzMaxim | 21:00c94aeb533e | 511 | // if the search was successful then |
IanBenzMaxim | 21:00c94aeb533e | 512 | if (!((id_bit_number <= (RomId::byteLen * 8)) || (crc8 != 0))) |
IanBenzMaxim | 21:00c94aeb533e | 513 | { |
IanBenzMaxim | 24:8942d8478d68 | 514 | // search successful so set m_last_discrepancy,m_last_device_flag,search_result |
IanBenzMaxim | 24:8942d8478d68 | 515 | _last_discrepancy = last_zero; |
IanBenzMaxim | 21:00c94aeb533e | 516 | |
IanBenzMaxim | 21:00c94aeb533e | 517 | // check for last device |
IanBenzMaxim | 24:8942d8478d68 | 518 | if (_last_discrepancy == 0) |
IanBenzMaxim | 24:8942d8478d68 | 519 | _last_device_flag = true; |
IanBenzMaxim | 21:00c94aeb533e | 520 | |
IanBenzMaxim | 21:00c94aeb533e | 521 | search_result = true; |
IanBenzMaxim | 21:00c94aeb533e | 522 | } |
IanBenzMaxim | 21:00c94aeb533e | 523 | } |
IanBenzMaxim | 21:00c94aeb533e | 524 | |
IanBenzMaxim | 21:00c94aeb533e | 525 | // if no device found then reset counters so next 'search' will be like a first |
IanBenzMaxim | 21:00c94aeb533e | 526 | if (!search_result || (romId.familyCode() == 0)) |
IanBenzMaxim | 21:00c94aeb533e | 527 | { |
IanBenzMaxim | 24:8942d8478d68 | 528 | _last_discrepancy = 0; |
IanBenzMaxim | 24:8942d8478d68 | 529 | _last_device_flag = false; |
IanBenzMaxim | 24:8942d8478d68 | 530 | _last_family_discrepancy = 0; |
IanBenzMaxim | 21:00c94aeb533e | 531 | search_result = false; |
IanBenzMaxim | 21:00c94aeb533e | 532 | } |
IanBenzMaxim | 21:00c94aeb533e | 533 | |
IanBenzMaxim | 21:00c94aeb533e | 534 | return search_result ? OneWireMaster::Success : OneWireMaster::OperationFailure; |
IanBenzMaxim | 21:00c94aeb533e | 535 | } |
IanBenzMaxim | 21:00c94aeb533e | 536 | |
IanBenzMaxim | 21:00c94aeb533e | 537 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 538 | // The 'OWReadBlock' receives a block of data from the |
IanBenzMaxim | 21:00c94aeb533e | 539 | // 1-Wire Net. The destination is the mac buffer (rx_mac=1) or |
IanBenzMaxim | 21:00c94aeb533e | 540 | // the scratchpad (rx_mac=0). The result is buffer is returned. |
IanBenzMaxim | 21:00c94aeb533e | 541 | // |
IanBenzMaxim | 21:00c94aeb533e | 542 | // 'rx_buf' - pointer to a block to receive bytes |
IanBenzMaxim | 21:00c94aeb533e | 543 | // of length 'rx_len' from 1-Wire Net |
IanBenzMaxim | 21:00c94aeb533e | 544 | // 'rx_len' - length in bytes to read. Only valid numbers are 8,16,20,32; |
IanBenzMaxim | 21:00c94aeb533e | 545 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 546 | OneWireMaster::CmdResult DS2465::OWReadBlock(std::uint8_t *rx_buf, std::uint8_t rx_len) |
IanBenzMaxim | 21:00c94aeb533e | 547 | { |
IanBenzMaxim | 21:00c94aeb533e | 548 | // 1-Wire Receive Block (Case A) |
IanBenzMaxim | 21:00c94aeb533e | 549 | // S AD,0 [A] ADDR_CMD_REG [A] 1WRF [A] PR [A] P |
IanBenzMaxim | 21:00c94aeb533e | 550 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 551 | // PR indicates byte containing parameter |
IanBenzMaxim | 21:00c94aeb533e | 552 | |
IanBenzMaxim | 24:8942d8478d68 | 553 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 554 | std::uint8_t command[2] = { CMD_1WRF, rx_len }; |
IanBenzMaxim | 24:8942d8478d68 | 555 | |
IanBenzMaxim | 24:8942d8478d68 | 556 | result = WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 24:8942d8478d68 | 557 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 558 | result = PollBusy(); |
IanBenzMaxim | 24:8942d8478d68 | 559 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 560 | result = ReadMemory(ADDR_SPAD, rx_buf, rx_len, false); |
IanBenzMaxim | 21:00c94aeb533e | 561 | |
IanBenzMaxim | 24:8942d8478d68 | 562 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 563 | } |
IanBenzMaxim | 21:00c94aeb533e | 564 | |
IanBenzMaxim | 21:00c94aeb533e | 565 | |
IanBenzMaxim | 21:00c94aeb533e | 566 | |
IanBenzMaxim | 21:00c94aeb533e | 567 | |
IanBenzMaxim | 27:d5aaefa252f1 | 568 | OneWireMaster::CmdResult DS2465::OWWriteBlock(const std::uint8_t *tran_buf, std::uint8_t tran_len) |
IanBenzMaxim | 21:00c94aeb533e | 569 | { |
IanBenzMaxim | 21:00c94aeb533e | 570 | return OWWriteBlock(false, tran_buf, tran_len); |
IanBenzMaxim | 21:00c94aeb533e | 571 | } |
IanBenzMaxim | 21:00c94aeb533e | 572 | |
IanBenzMaxim | 21:00c94aeb533e | 573 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 574 | // The 'OWWriteBlock' transfers a block of data to the |
IanBenzMaxim | 21:00c94aeb533e | 575 | // 1-Wire Net. The mac buffer can be sent (tx_mac=1) or a |
IanBenzMaxim | 21:00c94aeb533e | 576 | // portion of the scratchpad can be sent. |
IanBenzMaxim | 21:00c94aeb533e | 577 | // |
IanBenzMaxim | 21:00c94aeb533e | 578 | // 'tx_mac' - flag to indicate if the MAC buffer is to be sent (1) or |
IanBenzMaxim | 21:00c94aeb533e | 579 | // the data provided in teh tran_buf is to be sent (0) |
IanBenzMaxim | 21:00c94aeb533e | 580 | // 'tran_buf' - pointer to a block of bytes |
IanBenzMaxim | 21:00c94aeb533e | 581 | // of length 'tran_len' that will be sent |
IanBenzMaxim | 21:00c94aeb533e | 582 | // to the 1-Wire Net |
IanBenzMaxim | 21:00c94aeb533e | 583 | // 'tran_len' - length in bytes to transfer. Only valid numbers are 8,16,20,32; |
IanBenzMaxim | 21:00c94aeb533e | 584 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 585 | OneWireMaster::CmdResult DS2465::OWWriteBlock(bool tx_mac, const std::uint8_t *tran_buf, std::uint8_t tran_len) |
IanBenzMaxim | 21:00c94aeb533e | 586 | { |
IanBenzMaxim | 21:00c94aeb533e | 587 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 588 | std::uint8_t command[2] = { CMD_1WTB, (tx_mac ? 0xFF : tran_len) }; |
IanBenzMaxim | 21:00c94aeb533e | 589 | |
IanBenzMaxim | 24:8942d8478d68 | 590 | if (!tx_mac) |
IanBenzMaxim | 21:00c94aeb533e | 591 | { |
IanBenzMaxim | 21:00c94aeb533e | 592 | // prefill scratchpad with required data |
IanBenzMaxim | 24:8942d8478d68 | 593 | result = WriteMemory(ADDR_SPAD, tran_buf, tran_len); |
IanBenzMaxim | 21:00c94aeb533e | 594 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 595 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 596 | } |
IanBenzMaxim | 21:00c94aeb533e | 597 | |
IanBenzMaxim | 21:00c94aeb533e | 598 | // 1-Wire Transmit Block (Case A) |
IanBenzMaxim | 21:00c94aeb533e | 599 | // S AD,0 [A] ADDR_CMD_REG [A] 1WTB [A] PR [A] P |
IanBenzMaxim | 21:00c94aeb533e | 600 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 601 | // PR indicates byte containing parameter |
IanBenzMaxim | 24:8942d8478d68 | 602 | |
IanBenzMaxim | 24:8942d8478d68 | 603 | result = WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 24:8942d8478d68 | 604 | |
IanBenzMaxim | 24:8942d8478d68 | 605 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 606 | result = PollBusy(); |
IanBenzMaxim | 21:00c94aeb533e | 607 | |
IanBenzMaxim | 24:8942d8478d68 | 608 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 609 | } |
IanBenzMaxim | 21:00c94aeb533e | 610 | |
IanBenzMaxim | 21:00c94aeb533e | 611 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 612 | // Send 8 bits of read communication to the 1-Wire Net and return the |
IanBenzMaxim | 21:00c94aeb533e | 613 | // result 8 bits read from the 1-Wire Net. |
IanBenzMaxim | 21:00c94aeb533e | 614 | // |
IanBenzMaxim | 21:00c94aeb533e | 615 | // Returns: 8 bits read from 1-Wire Net |
IanBenzMaxim | 21:00c94aeb533e | 616 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 617 | OneWireMaster::CmdResult DS2465::OWReadByte(std::uint8_t & recvbyte, OW_LEVEL after_level) |
IanBenzMaxim | 21:00c94aeb533e | 618 | { |
IanBenzMaxim | 24:8942d8478d68 | 619 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 620 | std::uint8_t buf; |
IanBenzMaxim | 21:00c94aeb533e | 621 | |
IanBenzMaxim | 24:8942d8478d68 | 622 | // 1-Wire Read Bytes (Case C) |
IanBenzMaxim | 24:8942d8478d68 | 623 | // S AD,0 [A] ADDR_CMD_REG [A] 1WRB [A] Sr AD,1 [A] [Status] A [Status] A |
IanBenzMaxim | 24:8942d8478d68 | 624 | // \--------/ |
IanBenzMaxim | 24:8942d8478d68 | 625 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 24:8942d8478d68 | 626 | // Sr AD,0 [A] SRP [A] E1 [A] Sr AD,1 [A] DD A\ P |
IanBenzMaxim | 24:8942d8478d68 | 627 | // |
IanBenzMaxim | 24:8942d8478d68 | 628 | // [] indicates from slave |
IanBenzMaxim | 24:8942d8478d68 | 629 | // DD data read |
IanBenzMaxim | 26:a361e3f42ba5 | 630 | |
IanBenzMaxim | 26:a361e3f42ba5 | 631 | result = ConfigureSPU(after_level == LEVEL_STRONG); |
IanBenzMaxim | 26:a361e3f42ba5 | 632 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 26:a361e3f42ba5 | 633 | return result; |
IanBenzMaxim | 24:8942d8478d68 | 634 | |
IanBenzMaxim | 24:8942d8478d68 | 635 | buf = CMD_1WRB; |
IanBenzMaxim | 24:8942d8478d68 | 636 | result = WriteMemory(ADDR_CMD_REG, &buf, 1); |
IanBenzMaxim | 21:00c94aeb533e | 637 | |
IanBenzMaxim | 24:8942d8478d68 | 638 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 639 | result = PollBusy(); |
IanBenzMaxim | 24:8942d8478d68 | 640 | |
IanBenzMaxim | 24:8942d8478d68 | 641 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 642 | result = ReadMemory(ADDR_DATA_REG, &buf, 1); |
IanBenzMaxim | 21:00c94aeb533e | 643 | |
IanBenzMaxim | 24:8942d8478d68 | 644 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 645 | recvbyte = buf; |
IanBenzMaxim | 21:00c94aeb533e | 646 | |
IanBenzMaxim | 24:8942d8478d68 | 647 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 648 | } |
IanBenzMaxim | 21:00c94aeb533e | 649 | |
IanBenzMaxim | 21:00c94aeb533e | 650 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 651 | // Send 8 bits of communication to the 1-Wire Net and verify that the |
IanBenzMaxim | 21:00c94aeb533e | 652 | // 8 bits read from the 1-Wire Net is the same (write operation). |
IanBenzMaxim | 21:00c94aeb533e | 653 | // The parameter 'sendbyte' least significant 8 bits are used. |
IanBenzMaxim | 21:00c94aeb533e | 654 | // |
IanBenzMaxim | 21:00c94aeb533e | 655 | // 'sendbyte' - 8 bits to send (least significant byte) |
IanBenzMaxim | 21:00c94aeb533e | 656 | // |
IanBenzMaxim | 21:00c94aeb533e | 657 | // Returns: true: bytes written and echo was the same |
IanBenzMaxim | 21:00c94aeb533e | 658 | // false: echo was not the same |
IanBenzMaxim | 21:00c94aeb533e | 659 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 660 | OneWireMaster::CmdResult DS2465::OWWriteByte(std::uint8_t sendbyte, OW_LEVEL after_level) |
IanBenzMaxim | 24:8942d8478d68 | 661 | { |
IanBenzMaxim | 21:00c94aeb533e | 662 | // 1-Wire Write Byte (Case B) |
IanBenzMaxim | 21:00c94aeb533e | 663 | // S AD,0 [A] ADDR_CMD_REG [A] 1WWB [A] DD [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 21:00c94aeb533e | 664 | // \--------/ |
IanBenzMaxim | 21:00c94aeb533e | 665 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 21:00c94aeb533e | 666 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 667 | // DD data to write |
IanBenzMaxim | 24:8942d8478d68 | 668 | |
IanBenzMaxim | 24:8942d8478d68 | 669 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 26:a361e3f42ba5 | 670 | |
IanBenzMaxim | 26:a361e3f42ba5 | 671 | result = ConfigureSPU(after_level == LEVEL_STRONG); |
IanBenzMaxim | 26:a361e3f42ba5 | 672 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 26:a361e3f42ba5 | 673 | return result; |
IanBenzMaxim | 26:a361e3f42ba5 | 674 | |
IanBenzMaxim | 27:d5aaefa252f1 | 675 | std::uint8_t command[2] = { CMD_1WWB, sendbyte }; |
IanBenzMaxim | 24:8942d8478d68 | 676 | |
IanBenzMaxim | 24:8942d8478d68 | 677 | result = WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 24:8942d8478d68 | 678 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 679 | result = PollBusy(); |
IanBenzMaxim | 21:00c94aeb533e | 680 | |
IanBenzMaxim | 24:8942d8478d68 | 681 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 682 | } |
IanBenzMaxim | 21:00c94aeb533e | 683 | |
IanBenzMaxim | 21:00c94aeb533e | 684 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 685 | // Send 1 bit of communication to the 1-Wire Net and return the |
IanBenzMaxim | 21:00c94aeb533e | 686 | // result 1 bit read from the 1-Wire Net. The parameter 'sendbit' |
IanBenzMaxim | 21:00c94aeb533e | 687 | // least significant bit is used and the least significant bit |
IanBenzMaxim | 21:00c94aeb533e | 688 | // of the result is the return bit. |
IanBenzMaxim | 21:00c94aeb533e | 689 | // |
IanBenzMaxim | 21:00c94aeb533e | 690 | // 'sendbit' - the least significant bit is the bit to send |
IanBenzMaxim | 21:00c94aeb533e | 691 | // |
IanBenzMaxim | 21:00c94aeb533e | 692 | // Returns: 0: 0 bit read from sendbit |
IanBenzMaxim | 21:00c94aeb533e | 693 | // 1: 1 bit read from sendbit |
IanBenzMaxim | 21:00c94aeb533e | 694 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 695 | OneWireMaster::CmdResult DS2465::OWTouchBit(std::uint8_t & sendrecvbit, OW_LEVEL after_level) |
IanBenzMaxim | 21:00c94aeb533e | 696 | { |
IanBenzMaxim | 21:00c94aeb533e | 697 | // 1-Wire bit (Case B) |
IanBenzMaxim | 21:00c94aeb533e | 698 | // S AD,0 [A] ADDR_CMD_REG [A] 1WSB [A] BB [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 21:00c94aeb533e | 699 | // \--------/ |
IanBenzMaxim | 21:00c94aeb533e | 700 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 21:00c94aeb533e | 701 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 702 | // BB indicates byte containing bit value in msbit |
IanBenzMaxim | 21:00c94aeb533e | 703 | |
IanBenzMaxim | 24:8942d8478d68 | 704 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 26:a361e3f42ba5 | 705 | |
IanBenzMaxim | 26:a361e3f42ba5 | 706 | result = ConfigureSPU(after_level == LEVEL_STRONG); |
IanBenzMaxim | 26:a361e3f42ba5 | 707 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 26:a361e3f42ba5 | 708 | return result; |
IanBenzMaxim | 26:a361e3f42ba5 | 709 | |
IanBenzMaxim | 27:d5aaefa252f1 | 710 | std::uint8_t command[2] = { CMD_1WSB, (sendrecvbit ? 0x80 : 0x00) }; |
IanBenzMaxim | 27:d5aaefa252f1 | 711 | std::uint8_t status; |
IanBenzMaxim | 24:8942d8478d68 | 712 | |
IanBenzMaxim | 24:8942d8478d68 | 713 | result = WriteMemory(ADDR_CMD_REG, command, 2); |
IanBenzMaxim | 21:00c94aeb533e | 714 | |
IanBenzMaxim | 24:8942d8478d68 | 715 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 716 | result = PollBusy(&status); |
IanBenzMaxim | 21:00c94aeb533e | 717 | |
IanBenzMaxim | 24:8942d8478d68 | 718 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 719 | sendrecvbit = (status & STATUS_SBR); |
IanBenzMaxim | 24:8942d8478d68 | 720 | |
IanBenzMaxim | 24:8942d8478d68 | 721 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 722 | } |
IanBenzMaxim | 21:00c94aeb533e | 723 | |
IanBenzMaxim | 21:00c94aeb533e | 724 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 725 | // Write to Scratchpad (SRAM) memory on the DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 726 | // |
IanBenzMaxim | 21:00c94aeb533e | 727 | // 'addr' - address to start writing (must be in SRAM) |
IanBenzMaxim | 21:00c94aeb533e | 728 | // 'buf' - buffer of data to write |
IanBenzMaxim | 21:00c94aeb533e | 729 | // 'len' - length to write |
IanBenzMaxim | 21:00c94aeb533e | 730 | // |
IanBenzMaxim | 21:00c94aeb533e | 731 | // Returns: true write successful |
IanBenzMaxim | 21:00c94aeb533e | 732 | // false failure to complete write |
IanBenzMaxim | 21:00c94aeb533e | 733 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 734 | OneWireMaster::CmdResult DS2465::CWriteMemory(std::uint8_t addr, const std::uint8_t * buf, std::size_t bufLen) const |
IanBenzMaxim | 21:00c94aeb533e | 735 | { |
IanBenzMaxim | 21:00c94aeb533e | 736 | int i; |
IanBenzMaxim | 21:00c94aeb533e | 737 | |
IanBenzMaxim | 21:00c94aeb533e | 738 | // Write SRAM (Case A) |
IanBenzMaxim | 21:00c94aeb533e | 739 | // S AD,0 [A] VSA [A] DD [A] P |
IanBenzMaxim | 21:00c94aeb533e | 740 | // \-----/ |
IanBenzMaxim | 21:00c94aeb533e | 741 | // Repeat for each data byte |
IanBenzMaxim | 21:00c94aeb533e | 742 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 743 | // VSA valid SRAM memory address |
IanBenzMaxim | 21:00c94aeb533e | 744 | // DD memory data to write |
IanBenzMaxim | 21:00c94aeb533e | 745 | |
IanBenzMaxim | 21:00c94aeb533e | 746 | m_I2C_interface.start(); |
IanBenzMaxim | 21:00c94aeb533e | 747 | if (m_I2C_interface.write((unsigned char)(m_I2C_address | I2C_WRITE)) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 748 | { |
IanBenzMaxim | 21:00c94aeb533e | 749 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 750 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 751 | } |
IanBenzMaxim | 21:00c94aeb533e | 752 | if (m_I2C_interface.write((unsigned char)addr) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 753 | { |
IanBenzMaxim | 21:00c94aeb533e | 754 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 755 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 756 | } |
IanBenzMaxim | 21:00c94aeb533e | 757 | // loop to write each byte |
IanBenzMaxim | 21:00c94aeb533e | 758 | for (i = 0; i < bufLen; i++) |
IanBenzMaxim | 21:00c94aeb533e | 759 | { |
IanBenzMaxim | 21:00c94aeb533e | 760 | if (m_I2C_interface.write(buf[i]) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 761 | { |
IanBenzMaxim | 21:00c94aeb533e | 762 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 763 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 764 | } |
IanBenzMaxim | 21:00c94aeb533e | 765 | } |
IanBenzMaxim | 21:00c94aeb533e | 766 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 767 | |
IanBenzMaxim | 21:00c94aeb533e | 768 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 769 | } |
IanBenzMaxim | 21:00c94aeb533e | 770 | |
IanBenzMaxim | 21:00c94aeb533e | 771 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 772 | // Read memory from the DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 773 | // |
IanBenzMaxim | 21:00c94aeb533e | 774 | // 'addr' - address to start reading |
IanBenzMaxim | 21:00c94aeb533e | 775 | // 'buf' - buffer to hold memory read |
IanBenzMaxim | 21:00c94aeb533e | 776 | // 'len' - length to read |
IanBenzMaxim | 21:00c94aeb533e | 777 | // 'skip_set_pointer' - flag to indicate to skip setting address pointer |
IanBenzMaxim | 21:00c94aeb533e | 778 | // |
IanBenzMaxim | 21:00c94aeb533e | 779 | // Returns: true read successful |
IanBenzMaxim | 21:00c94aeb533e | 780 | // false failure to complete read |
IanBenzMaxim | 21:00c94aeb533e | 781 | // |
IanBenzMaxim | 27:d5aaefa252f1 | 782 | OneWireMaster::CmdResult DS2465::ReadMemory(std::uint8_t addr, std::uint8_t * buf, std::size_t bufLen, bool skip_set_pointer) const |
IanBenzMaxim | 21:00c94aeb533e | 783 | { |
IanBenzMaxim | 21:00c94aeb533e | 784 | int i; |
IanBenzMaxim | 21:00c94aeb533e | 785 | |
IanBenzMaxim | 21:00c94aeb533e | 786 | // Read (Case A) |
IanBenzMaxim | 21:00c94aeb533e | 787 | // S AD,0 [A] MA [A] Sr AD,1 [A] [DD] A [DD] A\ P |
IanBenzMaxim | 21:00c94aeb533e | 788 | // \-----/ |
IanBenzMaxim | 21:00c94aeb533e | 789 | // Repeat for each data byte, NAK last byte |
IanBenzMaxim | 21:00c94aeb533e | 790 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 791 | // MA memory address |
IanBenzMaxim | 21:00c94aeb533e | 792 | // DD memory data read |
IanBenzMaxim | 21:00c94aeb533e | 793 | |
IanBenzMaxim | 21:00c94aeb533e | 794 | m_I2C_interface.start(); |
IanBenzMaxim | 21:00c94aeb533e | 795 | if (!skip_set_pointer) |
IanBenzMaxim | 21:00c94aeb533e | 796 | { |
IanBenzMaxim | 21:00c94aeb533e | 797 | if (m_I2C_interface.write((unsigned char)(m_I2C_address | I2C_WRITE)) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 798 | { |
IanBenzMaxim | 21:00c94aeb533e | 799 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 800 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 801 | } |
IanBenzMaxim | 21:00c94aeb533e | 802 | if (m_I2C_interface.write((unsigned char)addr) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 803 | { |
IanBenzMaxim | 21:00c94aeb533e | 804 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 805 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 806 | } |
IanBenzMaxim | 21:00c94aeb533e | 807 | m_I2C_interface.start(); |
IanBenzMaxim | 21:00c94aeb533e | 808 | } |
IanBenzMaxim | 21:00c94aeb533e | 809 | |
IanBenzMaxim | 21:00c94aeb533e | 810 | if (m_I2C_interface.write((unsigned char)(m_I2C_address | I2C_READ)) != I2C_WRITE_OK) |
IanBenzMaxim | 21:00c94aeb533e | 811 | { |
IanBenzMaxim | 21:00c94aeb533e | 812 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 813 | return OneWireMaster::CommunicationWriteError; |
IanBenzMaxim | 21:00c94aeb533e | 814 | } |
IanBenzMaxim | 21:00c94aeb533e | 815 | // loop to read each byte, NAK last byte |
IanBenzMaxim | 21:00c94aeb533e | 816 | for (i = 0; i < bufLen; i++) |
IanBenzMaxim | 21:00c94aeb533e | 817 | { |
IanBenzMaxim | 21:00c94aeb533e | 818 | buf[i] = m_I2C_interface.read((i == (bufLen - 1)) ? m_I2C_interface.NoACK : m_I2C_interface.ACK); |
IanBenzMaxim | 21:00c94aeb533e | 819 | } |
IanBenzMaxim | 21:00c94aeb533e | 820 | m_I2C_interface.stop(); |
IanBenzMaxim | 21:00c94aeb533e | 821 | |
IanBenzMaxim | 21:00c94aeb533e | 822 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 823 | } |
IanBenzMaxim | 21:00c94aeb533e | 824 | |
IanBenzMaxim | 21:00c94aeb533e | 825 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 826 | // Write the configuration register in the DS2465. The configuration |
IanBenzMaxim | 21:00c94aeb533e | 827 | // options are provided in the lower nibble of the provided config byte. |
IanBenzMaxim | 21:00c94aeb533e | 828 | // The uppper nibble in bitwise inverted when written to the DS2465. |
IanBenzMaxim | 21:00c94aeb533e | 829 | // |
IanBenzMaxim | 21:00c94aeb533e | 830 | // Returns: true: config written and response correct |
IanBenzMaxim | 21:00c94aeb533e | 831 | // false: response incorrect |
IanBenzMaxim | 21:00c94aeb533e | 832 | // |
IanBenzMaxim | 24:8942d8478d68 | 833 | OneWireMaster::CmdResult DS2465::WriteConfig(const Config & config) |
IanBenzMaxim | 21:00c94aeb533e | 834 | { |
IanBenzMaxim | 24:8942d8478d68 | 835 | std::uint8_t configBuf; |
IanBenzMaxim | 24:8942d8478d68 | 836 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 21:00c94aeb533e | 837 | |
IanBenzMaxim | 24:8942d8478d68 | 838 | configBuf = config.writeByte(); |
IanBenzMaxim | 24:8942d8478d68 | 839 | result = WriteMemory(ADDR_WCFG_REG, &configBuf, 1); |
IanBenzMaxim | 24:8942d8478d68 | 840 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 841 | { |
IanBenzMaxim | 24:8942d8478d68 | 842 | result = ReadMemory(ADDR_WCFG_REG, &configBuf, 1); |
IanBenzMaxim | 24:8942d8478d68 | 843 | } |
IanBenzMaxim | 24:8942d8478d68 | 844 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 845 | { |
IanBenzMaxim | 24:8942d8478d68 | 846 | if (configBuf != config.readByte()) |
IanBenzMaxim | 24:8942d8478d68 | 847 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 21:00c94aeb533e | 848 | } |
IanBenzMaxim | 21:00c94aeb533e | 849 | |
IanBenzMaxim | 24:8942d8478d68 | 850 | return result; |
IanBenzMaxim | 24:8942d8478d68 | 851 | } |
IanBenzMaxim | 24:8942d8478d68 | 852 | |
IanBenzMaxim | 24:8942d8478d68 | 853 | |
IanBenzMaxim | 24:8942d8478d68 | 854 | |
IanBenzMaxim | 24:8942d8478d68 | 855 | |
IanBenzMaxim | 27:d5aaefa252f1 | 856 | OneWireMaster::CmdResult DS2465::PollBusy(std::uint8_t * pStatus) |
IanBenzMaxim | 24:8942d8478d68 | 857 | { |
IanBenzMaxim | 24:8942d8478d68 | 858 | const unsigned int pollLimit = 200; |
IanBenzMaxim | 24:8942d8478d68 | 859 | |
IanBenzMaxim | 24:8942d8478d68 | 860 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 861 | std::uint8_t status; |
IanBenzMaxim | 24:8942d8478d68 | 862 | unsigned int pollCount = 0; |
IanBenzMaxim | 24:8942d8478d68 | 863 | |
IanBenzMaxim | 24:8942d8478d68 | 864 | // loop checking 1WB bit for completion of 1-Wire operation |
IanBenzMaxim | 24:8942d8478d68 | 865 | // abort if poll limit reached |
IanBenzMaxim | 24:8942d8478d68 | 866 | |
IanBenzMaxim | 24:8942d8478d68 | 867 | do |
IanBenzMaxim | 24:8942d8478d68 | 868 | { |
IanBenzMaxim | 24:8942d8478d68 | 869 | result = ReadMemory(ADDR_STATUS_REG, &status, 1, true); |
IanBenzMaxim | 24:8942d8478d68 | 870 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 871 | return result; |
IanBenzMaxim | 24:8942d8478d68 | 872 | if (pStatus != NULL) |
IanBenzMaxim | 24:8942d8478d68 | 873 | *pStatus = status; |
IanBenzMaxim | 24:8942d8478d68 | 874 | if (pollCount++ >= pollLimit) |
IanBenzMaxim | 24:8942d8478d68 | 875 | return OneWireMaster::TimeoutError; |
IanBenzMaxim | 24:8942d8478d68 | 876 | } while (status & STATUS_1WB); |
IanBenzMaxim | 24:8942d8478d68 | 877 | |
IanBenzMaxim | 21:00c94aeb533e | 878 | return OneWireMaster::Success; |
IanBenzMaxim | 21:00c94aeb533e | 879 | } |
IanBenzMaxim | 21:00c94aeb533e | 880 | |
IanBenzMaxim | 21:00c94aeb533e | 881 | //-------------------------------------------------------------------------- |
IanBenzMaxim | 21:00c94aeb533e | 882 | // Reset all of the devices on the 1-Wire Net and return the result. |
IanBenzMaxim | 21:00c94aeb533e | 883 | // |
IanBenzMaxim | 21:00c94aeb533e | 884 | // Returns: true(1): presense pulse(s) detected, device(s) reset |
IanBenzMaxim | 21:00c94aeb533e | 885 | // false(0): no presense pulses detected |
IanBenzMaxim | 21:00c94aeb533e | 886 | // |
IanBenzMaxim | 21:00c94aeb533e | 887 | OneWireMaster::CmdResult DS2465::OWReset(void) |
IanBenzMaxim | 24:8942d8478d68 | 888 | { |
IanBenzMaxim | 24:8942d8478d68 | 889 | // 1-Wire reset (Case B) |
IanBenzMaxim | 24:8942d8478d68 | 890 | // S AD,0 [A] ADDR_CMD_REG [A] 1WRS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
IanBenzMaxim | 24:8942d8478d68 | 891 | // \--------/ |
IanBenzMaxim | 24:8942d8478d68 | 892 | // Repeat until 1WB bit has changed to 0 |
IanBenzMaxim | 24:8942d8478d68 | 893 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 894 | |
IanBenzMaxim | 24:8942d8478d68 | 895 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 896 | std::uint8_t buf; |
IanBenzMaxim | 21:00c94aeb533e | 897 | |
IanBenzMaxim | 24:8942d8478d68 | 898 | buf = CMD_1WRS; |
IanBenzMaxim | 24:8942d8478d68 | 899 | result = WriteMemory(ADDR_CMD_REG, &buf, 1); |
IanBenzMaxim | 21:00c94aeb533e | 900 | |
IanBenzMaxim | 24:8942d8478d68 | 901 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 902 | result = PollBusy(&buf); |
IanBenzMaxim | 24:8942d8478d68 | 903 | |
IanBenzMaxim | 24:8942d8478d68 | 904 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 905 | { |
IanBenzMaxim | 24:8942d8478d68 | 906 | // check for presence detect |
IanBenzMaxim | 24:8942d8478d68 | 907 | if ((buf & STATUS_PPD) != STATUS_PPD) |
IanBenzMaxim | 24:8942d8478d68 | 908 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 24:8942d8478d68 | 909 | } |
IanBenzMaxim | 21:00c94aeb533e | 910 | |
IanBenzMaxim | 24:8942d8478d68 | 911 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 912 | } |
IanBenzMaxim | 21:00c94aeb533e | 913 | |
IanBenzMaxim | 21:00c94aeb533e | 914 | OneWireMaster::CmdResult DS2465::Reset(void) |
IanBenzMaxim | 24:8942d8478d68 | 915 | { |
IanBenzMaxim | 21:00c94aeb533e | 916 | // Device Reset |
IanBenzMaxim | 21:00c94aeb533e | 917 | // S AD,0 [A] ADDR_CMD_REG [A] 1WMR [A] Sr AD,1 [A] [SS] A\ P |
IanBenzMaxim | 21:00c94aeb533e | 918 | // [] indicates from slave |
IanBenzMaxim | 21:00c94aeb533e | 919 | // SS status byte to read to verify state |
IanBenzMaxim | 21:00c94aeb533e | 920 | |
IanBenzMaxim | 24:8942d8478d68 | 921 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 27:d5aaefa252f1 | 922 | std::uint8_t buf; |
IanBenzMaxim | 21:00c94aeb533e | 923 | |
IanBenzMaxim | 24:8942d8478d68 | 924 | buf = CMD_1WMR; |
IanBenzMaxim | 24:8942d8478d68 | 925 | result = WriteMemory(ADDR_CMD_REG, &buf, 1); |
IanBenzMaxim | 21:00c94aeb533e | 926 | |
IanBenzMaxim | 24:8942d8478d68 | 927 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 928 | result = ReadMemory(ADDR_STATUS_REG, &buf, 1, true); |
IanBenzMaxim | 24:8942d8478d68 | 929 | |
IanBenzMaxim | 24:8942d8478d68 | 930 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 931 | { |
IanBenzMaxim | 24:8942d8478d68 | 932 | if ((buf & 0xF7) != 0x10) |
IanBenzMaxim | 24:8942d8478d68 | 933 | result = OneWireMaster::OperationFailure; |
IanBenzMaxim | 21:00c94aeb533e | 934 | } |
IanBenzMaxim | 24:8942d8478d68 | 935 | |
IanBenzMaxim | 24:8942d8478d68 | 936 | if (result == OneWireMaster::Success) |
IanBenzMaxim | 24:8942d8478d68 | 937 | OWReset(); // do a command to get 1-Wire master reset out of holding state |
IanBenzMaxim | 21:00c94aeb533e | 938 | |
IanBenzMaxim | 24:8942d8478d68 | 939 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 940 | } |
IanBenzMaxim | 21:00c94aeb533e | 941 | |
IanBenzMaxim | 21:00c94aeb533e | 942 | OneWireMaster::CmdResult DS2465::Detect(void) |
IanBenzMaxim | 21:00c94aeb533e | 943 | { |
IanBenzMaxim | 21:00c94aeb533e | 944 | OneWireMaster::CmdResult result; |
IanBenzMaxim | 21:00c94aeb533e | 945 | |
IanBenzMaxim | 21:00c94aeb533e | 946 | // reset DS2465 |
IanBenzMaxim | 21:00c94aeb533e | 947 | result = Reset(); |
IanBenzMaxim | 21:00c94aeb533e | 948 | if (result != OneWireMaster::Success) |
IanBenzMaxim | 21:00c94aeb533e | 949 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 950 | |
IanBenzMaxim | 21:00c94aeb533e | 951 | // default configuration |
IanBenzMaxim | 24:8942d8478d68 | 952 | m_curConfig.reset(); |
IanBenzMaxim | 21:00c94aeb533e | 953 | |
IanBenzMaxim | 21:00c94aeb533e | 954 | // write the default configuration setup |
IanBenzMaxim | 24:8942d8478d68 | 955 | result = WriteConfig(m_curConfig); |
IanBenzMaxim | 21:00c94aeb533e | 956 | return result; |
IanBenzMaxim | 21:00c94aeb533e | 957 | } |