anthony peltriaux / Mbed 2 deprecated DISCO-F746NG_blink_led

Projet interfaçage

Dependencies:   mbed BSP_DISCO_F746NG

I2Cdev.cpp@1:eb044e6a9033, 2021-06-22 (annotated)

Committer:
anthonyp08
Date:
Tue Jun 22 12:04:16 2021 +0000
Revision:
1:eb044e6a9033
Parent:
0:1c6757f4b61c 
projet

Who changed what in which revision?

UserRevisionLine numberNew contents of line
anthonyp08 0:1c6757f4b61c 1 // ported from arduino library: https://github.com/jrowberg/i2cdevlib
anthonyp08 0:1c6757f4b61c 2 // written by szymon gaertig (email: szymon@gaertig.com.pl, website: szymongaertig.pl)
anthonyp08 0:1c6757f4b61c 3 // Changelog:
anthonyp08 0:1c6757f4b61c 4 // 2013-01-08 - first release
anthonyp08 0:1c6757f4b61c 5
anthonyp08 0:1c6757f4b61c 6 #include "I2Cdev.h"
anthonyp08 0:1c6757f4b61c 7
anthonyp08 0:1c6757f4b61c 8
anthonyp08 0:1c6757f4b61c 9 I2Cdev::I2Cdev(I2C &interface) : i2c(interface)
anthonyp08 0:1c6757f4b61c 10 {
anthonyp08 0:1c6757f4b61c 11
anthonyp08 0:1c6757f4b61c 12 }
anthonyp08 0:1c6757f4b61c 13
anthonyp08 0:1c6757f4b61c 14 /** Read a single bit from an 8-bit device register.
anthonyp08 0:1c6757f4b61c 15 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 16 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 17 * @param bitNum Bit position to read (0-7)
anthonyp08 0:1c6757f4b61c 18 * @param data Container for single bit value
anthonyp08 0:1c6757f4b61c 19 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 20 * @return Status of read operation (true = success)
anthonyp08 0:1c6757f4b61c 21 */
anthonyp08 0:1c6757f4b61c 22 int8_t I2Cdev::readBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint8_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 23 uint8_t b;
anthonyp08 0:1c6757f4b61c 24 uint8_t count = readByte(devAddr, regAddr, &b, timeout);
anthonyp08 0:1c6757f4b61c 25 *data = b & (1 << bitNum);
anthonyp08 0:1c6757f4b61c 26 return count;
anthonyp08 0:1c6757f4b61c 27 }
anthonyp08 0:1c6757f4b61c 28
anthonyp08 0:1c6757f4b61c 29 /** Read a single bit from a 16-bit device register.
anthonyp08 0:1c6757f4b61c 30 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 31 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 32 * @param bitNum Bit position to read (0-15)
anthonyp08 0:1c6757f4b61c 33 * @param data Container for single bit value
anthonyp08 0:1c6757f4b61c 34 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 35 * @return Status of read operation (true = success)
anthonyp08 0:1c6757f4b61c 36 */
anthonyp08 0:1c6757f4b61c 37 int8_t I2Cdev::readBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 38 uint16_t b;
anthonyp08 0:1c6757f4b61c 39 uint8_t count = readWord(devAddr, regAddr, &b, timeout);
anthonyp08 0:1c6757f4b61c 40 *data = b & (1 << bitNum);
anthonyp08 0:1c6757f4b61c 41 return count;
anthonyp08 0:1c6757f4b61c 42 }
anthonyp08 0:1c6757f4b61c 43
anthonyp08 0:1c6757f4b61c 44 /** Read multiple bits from an 8-bit device register.
anthonyp08 0:1c6757f4b61c 45 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 46 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 47 * @param bitStart First bit position to read (0-7)
anthonyp08 0:1c6757f4b61c 48 * @param length Number of bits to read (not more than 8)
anthonyp08 0:1c6757f4b61c 49 * @param data Container for right-aligned value (i.e. '101' read from any bitStart position will equal 0x05)
anthonyp08 0:1c6757f4b61c 50 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 51 * @return Status of read operation (true = success)
anthonyp08 0:1c6757f4b61c 52 */
anthonyp08 0:1c6757f4b61c 53 int8_t I2Cdev::readBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 54 // 01101001 read byte
anthonyp08 0:1c6757f4b61c 55 // 76543210 bit numbers
anthonyp08 0:1c6757f4b61c 56 // xxx args: bitStart=4, length=3
anthonyp08 0:1c6757f4b61c 57 // 010 masked
anthonyp08 0:1c6757f4b61c 58 // -> 010 shifted
anthonyp08 0:1c6757f4b61c 59 uint8_t count, b;
anthonyp08 0:1c6757f4b61c 60 if ((count = readByte(devAddr, regAddr, &b, timeout)) != 0) {
anthonyp08 0:1c6757f4b61c 61 uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 62 b &= mask;
anthonyp08 0:1c6757f4b61c 63 b >>= (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 64 *data = b;
anthonyp08 0:1c6757f4b61c 65 }
anthonyp08 0:1c6757f4b61c 66 return count;
anthonyp08 0:1c6757f4b61c 67 }
anthonyp08 0:1c6757f4b61c 68
anthonyp08 0:1c6757f4b61c 69 /** Read multiple bits from a 16-bit device register.
anthonyp08 0:1c6757f4b61c 70 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 71 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 72 * @param bitStart First bit position to read (0-15)
anthonyp08 0:1c6757f4b61c 73 * @param length Number of bits to read (not more than 16)
anthonyp08 0:1c6757f4b61c 74 * @param data Container for right-aligned value (i.e. '101' read from any bitStart position will equal 0x05)
anthonyp08 0:1c6757f4b61c 75 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 76 * @return Status of read operation (1 = success, 0 = failure, -1 = timeout)
anthonyp08 0:1c6757f4b61c 77 */
anthonyp08 0:1c6757f4b61c 78 int8_t I2Cdev::readBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 79 // 1101011001101001 read byte
anthonyp08 0:1c6757f4b61c 80 // fedcba9876543210 bit numbers
anthonyp08 0:1c6757f4b61c 81 // xxx args: bitStart=12, length=3
anthonyp08 0:1c6757f4b61c 82 // 010 masked
anthonyp08 0:1c6757f4b61c 83 // -> 010 shifted
anthonyp08 0:1c6757f4b61c 84 uint8_t count;
anthonyp08 0:1c6757f4b61c 85 uint16_t w;
anthonyp08 0:1c6757f4b61c 86 if ((count = readWord(devAddr, regAddr, &w, timeout)) != 0) {
anthonyp08 0:1c6757f4b61c 87 uint16_t mask = ((1 << length) - 1) << (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 88 w &= mask;
anthonyp08 0:1c6757f4b61c 89 w >>= (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 90 *data = w;
anthonyp08 0:1c6757f4b61c 91 }
anthonyp08 0:1c6757f4b61c 92 return count;
anthonyp08 0:1c6757f4b61c 93 }
anthonyp08 0:1c6757f4b61c 94 /** Read single byte from an 8-bit device register.
anthonyp08 0:1c6757f4b61c 95 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 96 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 97 * @param data Container for byte value read from device
anthonyp08 0:1c6757f4b61c 98 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 99 * @return Status of read operation (true = success)
anthonyp08 0:1c6757f4b61c 100 */
anthonyp08 0:1c6757f4b61c 101 int8_t I2Cdev::readByte(uint8_t devAddr, uint8_t regAddr, uint8_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 102 return readBytes(devAddr, regAddr, 1, data, timeout);
anthonyp08 0:1c6757f4b61c 103 }
anthonyp08 0:1c6757f4b61c 104
anthonyp08 0:1c6757f4b61c 105 /** Read single word from a 16-bit device register.
anthonyp08 0:1c6757f4b61c 106 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 107 * @param regAddr Register regAddr to read from
anthonyp08 0:1c6757f4b61c 108 * @param data Container for word value read from device
anthonyp08 0:1c6757f4b61c 109 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 110 * @return Status of read operation (true = success)
anthonyp08 0:1c6757f4b61c 111 */
anthonyp08 0:1c6757f4b61c 112 int8_t I2Cdev::readWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data, uint16_t timeout) {
anthonyp08 0:1c6757f4b61c 113 return readWords(devAddr, regAddr, 1, data, timeout);
anthonyp08 0:1c6757f4b61c 114 }
anthonyp08 0:1c6757f4b61c 115
anthonyp08 0:1c6757f4b61c 116 /** Read multiple bytes from an 8-bit device register.
anthonyp08 0:1c6757f4b61c 117 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 118 * @param regAddr First register regAddr to read from
anthonyp08 0:1c6757f4b61c 119 * @param length Number of bytes to read
anthonyp08 0:1c6757f4b61c 120 * @param data Buffer to store read data in
anthonyp08 0:1c6757f4b61c 121 * @param timeout Optional read timeout in milliseconds (0 to disable, leave off to use default class value in I2Cdev::readTimeout)
anthonyp08 0:1c6757f4b61c 122 * @return Number of bytes read (-1 indicates failure)
anthonyp08 0:1c6757f4b61c 123 */
anthonyp08 0:1c6757f4b61c 124 int8_t I2Cdev::readBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t *data, uint16_t timeout)
anthonyp08 0:1c6757f4b61c 125 {
anthonyp08 0:1c6757f4b61c 126 char command[1];
anthonyp08 0:1c6757f4b61c 127 command[0] = regAddr;
anthonyp08 0:1c6757f4b61c 128 char *redData = (char*)malloc(length);
anthonyp08 0:1c6757f4b61c 129 i2c.write(devAddr<<1, command, 1, true);
anthonyp08 0:1c6757f4b61c 130 i2c.read(devAddr<<1, redData, length);
anthonyp08 0:1c6757f4b61c 131 for(int i =0; i < length; i++) {
anthonyp08 0:1c6757f4b61c 132 data[i] = redData[i];
anthonyp08 0:1c6757f4b61c 133 }
anthonyp08 0:1c6757f4b61c 134 free (redData);
anthonyp08 0:1c6757f4b61c 135 return length;
anthonyp08 0:1c6757f4b61c 136 }
anthonyp08 0:1c6757f4b61c 137
anthonyp08 0:1c6757f4b61c 138 int8_t I2Cdev::readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data, uint16_t timeout)
anthonyp08 0:1c6757f4b61c 139 {
anthonyp08 0:1c6757f4b61c 140 return 0;
anthonyp08 0:1c6757f4b61c 141 }
anthonyp08 0:1c6757f4b61c 142
anthonyp08 0:1c6757f4b61c 143 /** write a single bit in an 8-bit device register.
anthonyp08 0:1c6757f4b61c 144 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 145 * @param regAddr Register regAddr to write to
anthonyp08 0:1c6757f4b61c 146 * @param bitNum Bit position to write (0-7)
anthonyp08 0:1c6757f4b61c 147 * @param value New bit value to write
anthonyp08 0:1c6757f4b61c 148 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 149 */
anthonyp08 0:1c6757f4b61c 150 bool I2Cdev::writeBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint8_t data) {
anthonyp08 0:1c6757f4b61c 151 uint8_t b;
anthonyp08 0:1c6757f4b61c 152 readByte(devAddr, regAddr, &b);
anthonyp08 0:1c6757f4b61c 153 b = (data != 0) ? (b | (1 << bitNum)) : (b & ~(1 << bitNum));
anthonyp08 0:1c6757f4b61c 154 return writeByte(devAddr, regAddr, b);
anthonyp08 0:1c6757f4b61c 155 }
anthonyp08 0:1c6757f4b61c 156
anthonyp08 0:1c6757f4b61c 157 /** write a single bit in a 16-bit device register.
anthonyp08 0:1c6757f4b61c 158 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 159 * @param regAddr Register regAddr to write to
anthonyp08 0:1c6757f4b61c 160 * @param bitNum Bit position to write (0-15)
anthonyp08 0:1c6757f4b61c 161 * @param value New bit value to write
anthonyp08 0:1c6757f4b61c 162 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 163 */
anthonyp08 0:1c6757f4b61c 164 bool I2Cdev::writeBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum, uint16_t data) {
anthonyp08 0:1c6757f4b61c 165 uint16_t w;
anthonyp08 0:1c6757f4b61c 166 readWord(devAddr, regAddr, &w);
anthonyp08 0:1c6757f4b61c 167 w = (data != 0) ? (w | (1 << bitNum)) : (w & ~(1 << bitNum));
anthonyp08 0:1c6757f4b61c 168 return writeWord(devAddr, regAddr, w);
anthonyp08 0:1c6757f4b61c 169 }
anthonyp08 0:1c6757f4b61c 170
anthonyp08 0:1c6757f4b61c 171 /** Write multiple bits in an 8-bit device register.
anthonyp08 0:1c6757f4b61c 172 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 173 * @param regAddr Register regAddr to write to
anthonyp08 0:1c6757f4b61c 174 * @param bitStart First bit position to write (0-7)
anthonyp08 0:1c6757f4b61c 175 * @param length Number of bits to write (not more than 8)
anthonyp08 0:1c6757f4b61c 176 * @param data Right-aligned value to write
anthonyp08 0:1c6757f4b61c 177 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 178 */
anthonyp08 0:1c6757f4b61c 179 bool I2Cdev::writeBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint8_t data) {
anthonyp08 0:1c6757f4b61c 180 // 010 value to write
anthonyp08 0:1c6757f4b61c 181 // 76543210 bit numbers
anthonyp08 0:1c6757f4b61c 182 // xxx args: bitStart=4, length=3
anthonyp08 0:1c6757f4b61c 183 // 00011100 mask byte
anthonyp08 0:1c6757f4b61c 184 // 10101111 original value (sample)
anthonyp08 0:1c6757f4b61c 185 // 10100011 original & ~mask
anthonyp08 0:1c6757f4b61c 186 // 10101011 masked | value
anthonyp08 0:1c6757f4b61c 187 uint8_t b;
anthonyp08 0:1c6757f4b61c 188 if (readByte(devAddr, regAddr, &b) != 0) {
anthonyp08 0:1c6757f4b61c 189 uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 190 data <<= (bitStart - length + 1); // shift data into correct position
anthonyp08 0:1c6757f4b61c 191 data &= mask; // zero all non-important bits in data
anthonyp08 0:1c6757f4b61c 192 b &= ~(mask); // zero all important bits in existing byte
anthonyp08 0:1c6757f4b61c 193 b |= data; // combine data with existing byte
anthonyp08 0:1c6757f4b61c 194 return writeByte(devAddr, regAddr, b);
anthonyp08 0:1c6757f4b61c 195 } else {
anthonyp08 0:1c6757f4b61c 196 return false;
anthonyp08 0:1c6757f4b61c 197 }
anthonyp08 0:1c6757f4b61c 198 }
anthonyp08 0:1c6757f4b61c 199
anthonyp08 0:1c6757f4b61c 200 /** Write multiple bits in a 16-bit device register.
anthonyp08 0:1c6757f4b61c 201 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 202 * @param regAddr Register regAddr to write to
anthonyp08 0:1c6757f4b61c 203 * @param bitStart First bit position to write (0-15)
anthonyp08 0:1c6757f4b61c 204 * @param length Number of bits to write (not more than 16)
anthonyp08 0:1c6757f4b61c 205 * @param data Right-aligned value to write
anthonyp08 0:1c6757f4b61c 206 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 207 */
anthonyp08 0:1c6757f4b61c 208 bool I2Cdev::writeBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart, uint8_t length, uint16_t data) {
anthonyp08 0:1c6757f4b61c 209 // 010 value to write
anthonyp08 0:1c6757f4b61c 210 // fedcba9876543210 bit numbers
anthonyp08 0:1c6757f4b61c 211 // xxx args: bitStart=12, length=3
anthonyp08 0:1c6757f4b61c 212 // 0001110000000000 mask byte
anthonyp08 0:1c6757f4b61c 213 // 1010111110010110 original value (sample)
anthonyp08 0:1c6757f4b61c 214 // 1010001110010110 original & ~mask
anthonyp08 0:1c6757f4b61c 215 // 1010101110010110 masked | value
anthonyp08 0:1c6757f4b61c 216 uint16_t w;
anthonyp08 0:1c6757f4b61c 217 if (readWord(devAddr, regAddr, &w) != 0) {
anthonyp08 0:1c6757f4b61c 218 uint8_t mask = ((1 << length) - 1) << (bitStart - length + 1);
anthonyp08 0:1c6757f4b61c 219 data <<= (bitStart - length + 1); // shift data into correct position
anthonyp08 0:1c6757f4b61c 220 data &= mask; // zero all non-important bits in data
anthonyp08 0:1c6757f4b61c 221 w &= ~(mask); // zero all important bits in existing word
anthonyp08 0:1c6757f4b61c 222 w |= data; // combine data with existing word
anthonyp08 0:1c6757f4b61c 223 return writeWord(devAddr, regAddr, w);
anthonyp08 0:1c6757f4b61c 224 } else {
anthonyp08 0:1c6757f4b61c 225 return false;
anthonyp08 0:1c6757f4b61c 226 }
anthonyp08 0:1c6757f4b61c 227 }
anthonyp08 0:1c6757f4b61c 228
anthonyp08 0:1c6757f4b61c 229 /** Write single byte to an 8-bit device register.
anthonyp08 0:1c6757f4b61c 230 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 231 * @param regAddr Register address to write to
anthonyp08 0:1c6757f4b61c 232 * @param data New byte value to write
anthonyp08 0:1c6757f4b61c 233 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 234 */
anthonyp08 0:1c6757f4b61c 235 bool I2Cdev::writeByte(uint8_t devAddr, uint8_t regAddr, uint8_t data) {
anthonyp08 0:1c6757f4b61c 236 return writeBytes(devAddr, regAddr, 1, &data);
anthonyp08 0:1c6757f4b61c 237 }
anthonyp08 0:1c6757f4b61c 238
anthonyp08 0:1c6757f4b61c 239 /** Write single word to a 16-bit device register.
anthonyp08 0:1c6757f4b61c 240 * @param devAddr I2C slave device address
anthonyp08 0:1c6757f4b61c 241 * @param regAddr Register address to write to
anthonyp08 0:1c6757f4b61c 242 * @param data New word value to write
anthonyp08 0:1c6757f4b61c 243 * @return Status of operation (true = success)
anthonyp08 0:1c6757f4b61c 244 */
anthonyp08 0:1c6757f4b61c 245 bool I2Cdev::writeWord(uint8_t devAddr, uint8_t regAddr, uint16_t data) {
anthonyp08 0:1c6757f4b61c 246 return writeWords(devAddr, regAddr, 1, &data);
anthonyp08 0:1c6757f4b61c 247 }
anthonyp08 0:1c6757f4b61c 248
anthonyp08 0:1c6757f4b61c 249 bool I2Cdev::writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t *data)
anthonyp08 0:1c6757f4b61c 250 {
anthonyp08 0:1c6757f4b61c 251 int len = length + 1;
anthonyp08 0:1c6757f4b61c 252 char *buf = (char*)malloc(len);
anthonyp08 0:1c6757f4b61c 253 buf[0] = regAddr;
anthonyp08 0:1c6757f4b61c 254 for (int i = 0; i < length; i++) {
anthonyp08 0:1c6757f4b61c 255 buf[i + 1] = data[i];
anthonyp08 0:1c6757f4b61c 256 }
anthonyp08 0:1c6757f4b61c 257 i2c.write(devAddr << 1 , buf, len);
anthonyp08 0:1c6757f4b61c 258
anthonyp08 0:1c6757f4b61c 259 free (buf);
anthonyp08 0:1c6757f4b61c 260 return true;
anthonyp08 0:1c6757f4b61c 261 }
anthonyp08 0:1c6757f4b61c 262
anthonyp08 0:1c6757f4b61c 263 bool I2Cdev::writeWords(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint16_t *data)
anthonyp08 0:1c6757f4b61c 264 {
anthonyp08 0:1c6757f4b61c 265 int len = length * 2 + 1;
anthonyp08 0:1c6757f4b61c 266 char *buf = (char*)malloc(len);
anthonyp08 0:1c6757f4b61c 267 buf[0] = regAddr;
anthonyp08 0:1c6757f4b61c 268 for (int i = 0; i < length; i++) {
anthonyp08 0:1c6757f4b61c 269 uint16_t word = data[i];
anthonyp08 0:1c6757f4b61c 270 buf[2*i + 1] = word >> 8;
anthonyp08 0:1c6757f4b61c 271 buf[2*i + 2] = word & 0xFF;
anthonyp08 0:1c6757f4b61c 272 }
anthonyp08 0:1c6757f4b61c 273 i2c.write(devAddr << 1 , buf, len);
anthonyp08 0:1c6757f4b61c 274
anthonyp08 0:1c6757f4b61c 275 free (buf);
anthonyp08 0:1c6757f4b61c 276 return true;
anthonyp08 0:1c6757f4b61c 277 }
anthonyp08 0:1c6757f4b61c 278
anthonyp08 0:1c6757f4b61c 279 uint16_t I2Cdev::readTimeout(void)
anthonyp08 0:1c6757f4b61c 280 {
anthonyp08 0:1c6757f4b61c 281 return 0;
anthonyp08 0:1c6757f4b61c 282 }