Maxim Integrated / OneWire

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Superseded by MaximInterface.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_Masters/DS2465/DS2465.cpp@26:a361e3f42ba5, 2016-03-23 (annotated)

Committer:
IanBenzMaxim
Date:
Wed Mar 23 15:25:40 2016 -0500
Revision:
26:a361e3f42ba5
Parent:
24:8942d8478d68
Child:
27:d5aaefa252f1
Rework the OneWireMaster virtual interface for simplicity.

Who changed what in which revision?

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