Karl Zweimüller / 24LCxx_I2C

Fork of 24LCxx_I2C. Works for Renesas EEPROMs. Fixes problems with PageWrites over page boundaries.

Fork of 24LCxx_I2C by Yann Garcia

24LCxx_I2C.cpp@3:fc3eb4d2b07e, 2014-05-21 (annotated)

Committer:
charly
Date:
Wed May 21 19:58:39 2014 +0000
Revision:
3:fc3eb4d2b07e
Parent:
2:16ce7dae9019
Child:
4:2add27250e69
fixes for Renesas EEPROM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yann 0:21c698aa86f6 1 /* mbed simplified access to Microchip 24LCxx Serial EEPROM devices (I2C)
Yann 0:21c698aa86f6 2 * Copyright (c) 2010-2012 ygarcia, MIT License
Yann 0:21c698aa86f6 3 *
Yann 0:21c698aa86f6 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Yann 0:21c698aa86f6 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
Yann 0:21c698aa86f6 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
Yann 0:21c698aa86f6 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
Yann 0:21c698aa86f6 8 * furnished to do so, subject to the following conditions:
Yann 0:21c698aa86f6 9 *
Yann 0:21c698aa86f6 10 * The above copyright notice and this permission notice shall be included in all copies or
Yann 0:21c698aa86f6 11 * substantial portions of the Software.
Yann 0:21c698aa86f6 12 *
Yann 0:21c698aa86f6 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Yann 0:21c698aa86f6 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Yann 0:21c698aa86f6 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Yann 0:21c698aa86f6 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Yann 0:21c698aa86f6 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Yann 0:21c698aa86f6 18 */
Yann 0:21c698aa86f6 19 #include <iostream>
Yann 0:21c698aa86f6 20 #include <sstream>
Yann 0:21c698aa86f6 21
Yann 0:21c698aa86f6 22 #include "24LCxx_I2C.h"
Yann 0:21c698aa86f6 23
Yann 0:21c698aa86f6 24 namespace _24LCXX_I2C {
Yann 0:21c698aa86f6 25
Yann 1:bdf87ab4cdb8 26 unsigned char C24LCXX_I2C::I2CModuleRefCounter = 0;
Yann 0:21c698aa86f6 27
Yann 2:16ce7dae9019 28 C24LCXX_I2C::C24LCXX_I2C(const PinName p_sda, const PinName p_scl, const unsigned char p_address, const PinName p_wp, const unsigned int p_frequency) : _internalId("") {
Yann 0:21c698aa86f6 29 DEBUG_ENTER("C24LCXX_I2C")
Yann 0:21c698aa86f6 30
Yann 1:bdf87ab4cdb8 31 if (C24LCXX_I2C::I2CModuleRefCounter != 0) {
Yann 0:21c698aa86f6 32 error("C24LCXX_I2C: Wrong params");
Yann 0:21c698aa86f6 33 }
Yann 0:21c698aa86f6 34 #ifdef __DEBUG
Yann 0:21c698aa86f6 35 std::ostringstream out(std::ostringstream::out);
Yann 1:bdf87ab4cdb8 36 out << "C24LCXX_I2C #" << C24LCXX_I2C::I2CModuleRefCounter;
Yann 0:21c698aa86f6 37 _internalId.assign(out.str());
Yann 0:21c698aa86f6 38 DEBUG("C24LCXX_I2C: _internalId='%s'", _internalId.c_str())
Yann 0:21c698aa86f6 39 #endif // __DEBUG
charly 3:fc3eb4d2b07e 40 _i2cInstance = new I2C(p_sda, p_scl); //, "24LCxx_I2C");
Yann 1:bdf87ab4cdb8 41 C24LCXX_I2C::I2CModuleRefCounter += 1;
Yann 1:bdf87ab4cdb8 42 DEBUG_ENTER("C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
Yann 0:21c698aa86f6 43
Yann 0:21c698aa86f6 44 _slaveAddress = (p_address << 1) | 0xa0; // Slave address format is: 1 0 1 0 A3 A2 A1 R/W
Yann 0:21c698aa86f6 45 DEBUG("C24LCXX_I2C: I2C slave adress: 0x%02x", _slaveAddress)
Yann 0:21c698aa86f6 46 _i2cInstance->frequency(p_frequency); // Set the frequency of the I2C interface
Yann 0:21c698aa86f6 47 if (p_wp != NC) {
Yann 0:21c698aa86f6 48 DEBUG("C24LCXX_I2C: WP managed");
Yann 0:21c698aa86f6 49 _wp = new DigitalOut(p_wp);
Yann 0:21c698aa86f6 50 _wp->write(0); // Disable write protect
Yann 0:21c698aa86f6 51 } else {
Yann 0:21c698aa86f6 52 DEBUG("C24LCXX_I2C: WP not managed");
Yann 0:21c698aa86f6 53 _wp = NULL; // Not used
Yann 0:21c698aa86f6 54 }
Yann 0:21c698aa86f6 55
Yann 0:21c698aa86f6 56 DEBUG_LEAVE("C24LCXX_I2C")
Yann 0:21c698aa86f6 57 }
Yann 0:21c698aa86f6 58
Yann 0:21c698aa86f6 59 C24LCXX_I2C::~C24LCXX_I2C() {
Yann 0:21c698aa86f6 60 DEBUG_ENTER("~C24LCXX_I2C")
Yann 0:21c698aa86f6 61
Yann 0:21c698aa86f6 62 // Release I2C instance
Yann 1:bdf87ab4cdb8 63 DEBUG_ENTER("~C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
Yann 1:bdf87ab4cdb8 64 C24LCXX_I2C::I2CModuleRefCounter -= 1;
Yann 1:bdf87ab4cdb8 65 if (C24LCXX_I2C::I2CModuleRefCounter == 0) {
Yann 0:21c698aa86f6 66 delete _i2cInstance;
Yann 0:21c698aa86f6 67 _i2cInstance = NULL;
Yann 0:21c698aa86f6 68 }
Yann 0:21c698aa86f6 69 // Release _wp if required
Yann 0:21c698aa86f6 70 if (_wp != NULL) {
Yann 0:21c698aa86f6 71 _wp->write(0);
Yann 0:21c698aa86f6 72 delete _wp;
Yann 0:21c698aa86f6 73 }
Yann 0:21c698aa86f6 74
Yann 0:21c698aa86f6 75 DEBUG_LEAVE("~C24LCXX_I2C")
Yann 0:21c698aa86f6 76 }
Yann 0:21c698aa86f6 77
Yann 0:21c698aa86f6 78 bool C24LCXX_I2C::WriteProtect(const bool p_writeProtect) {
Yann 0:21c698aa86f6 79 if (_wp != NULL) {
Yann 0:21c698aa86f6 80 DEBUG("WP set to: %x", (int)p_writeProtect)
Yann 0:21c698aa86f6 81 _wp->write((int)(p_writeProtect));
Yann 0:21c698aa86f6 82 return true;
Yann 0:21c698aa86f6 83 }
Yann 0:21c698aa86f6 84
Yann 0:21c698aa86f6 85 return false;
Yann 0:21c698aa86f6 86 }
Yann 0:21c698aa86f6 87
Yann 0:21c698aa86f6 88 bool C24LCXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern) {
Yann 0:21c698aa86f6 89 DEBUG_ENTER("C24LCXX_I2C::EraseMemoryArea: 0x%02x - %d - 0x%02x", p_startAddress, p_count, p_pattern)
Yann 0:21c698aa86f6 90
Yann 0:21c698aa86f6 91 std::vector<unsigned char> eraseBuffer(p_count, p_pattern);
Yann 0:21c698aa86f6 92 return Write(p_startAddress, eraseBuffer, false);
Yann 0:21c698aa86f6 93 }
Yann 0:21c698aa86f6 94
Yann 0:21c698aa86f6 95 bool C24LCXX_I2C::Write(const short p_address, const unsigned char p_byte) {
Yann 0:21c698aa86f6 96 DEBUG_ENTER("C24LCXX_I2C::Write (byte): Memory address: 0x%02x - 0x%02x", p_address, p_byte)
Yann 0:21c698aa86f6 97
Yann 0:21c698aa86f6 98 // 1.Prepare buffer
Yann 0:21c698aa86f6 99 char i2cBuffer[3]; // Memory address + one byte of data
Yann 0:21c698aa86f6 100 // 1.1. Memory address
charly 3:fc3eb4d2b07e 101 //short address = p_address + 1; // Index start to 1
charly 3:fc3eb4d2b07e 102 short address = p_address; // no Index + 1
Yann 0:21c698aa86f6 103 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 104 DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 105 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 106 DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 107 // 1.2. Datas
Yann 0:21c698aa86f6 108 i2cBuffer[2] = p_byte;
Yann 0:21c698aa86f6 109 DEBUG("C24LCXX_I2C::Write (byte): value=0x%02x", i2cBuffer[2])
Yann 0:21c698aa86f6 110
Yann 0:21c698aa86f6 111 // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
Yann 0:21c698aa86f6 112 int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 3);
Yann 0:21c698aa86f6 113 wait(0.02);
Yann 0:21c698aa86f6 114
Yann 0:21c698aa86f6 115 DEBUG_LEAVE("C24LCXX_I2C::Write (byte) %x", (bool)(result == 0))
Yann 0:21c698aa86f6 116 return (bool)(result == 0);
Yann 0:21c698aa86f6 117 }
Yann 0:21c698aa86f6 118
Yann 0:21c698aa86f6 119 bool C24LCXX_I2C::Write(const short p_address, const short p_short, const C24LCXX_I2C::Mode p_mode) {
Yann 0:21c698aa86f6 120 DEBUG_ENTER("C24LCXX_I2C::Write (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
Yann 0:21c698aa86f6 121
Yann 0:21c698aa86f6 122 // 1.Prepare buffer
Yann 0:21c698aa86f6 123 char i2cBuffer[4]; // Memory address + one short (2 bytes)
Yann 0:21c698aa86f6 124 // 1.1. Memory address
charly 3:fc3eb4d2b07e 125 //short address = p_address + 1; // Index start to 1
charly 3:fc3eb4d2b07e 126 short address = p_address; // no Index+1
Yann 0:21c698aa86f6 127 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 128 DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 129 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 130 DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 131 // 1.2. Datas
Yann 0:21c698aa86f6 132 if (p_mode == BigEndian) {
Yann 0:21c698aa86f6 133 i2cBuffer[2] = (unsigned char)(p_short >> 8);
Yann 0:21c698aa86f6 134 i2cBuffer[3] = (unsigned char)((unsigned char)p_short & 0xff);
Yann 0:21c698aa86f6 135 } else {
Yann 0:21c698aa86f6 136 i2cBuffer[2] = (unsigned char)((unsigned char)p_short & 0xff);
Yann 0:21c698aa86f6 137 i2cBuffer[3] = (unsigned char)(p_short >> 8);
Yann 0:21c698aa86f6 138 }
Yann 0:21c698aa86f6 139 DEBUG("C24LCXX_I2C::Write (short): value=0x%02x%02x", i2cBuffer[2], i2cBuffer[3])
Yann 0:21c698aa86f6 140
Yann 0:21c698aa86f6 141 // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
Yann 0:21c698aa86f6 142 int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 4);
Yann 0:21c698aa86f6 143 wait(0.02);
Yann 0:21c698aa86f6 144
Yann 0:21c698aa86f6 145 DEBUG_LEAVE("C24LCXX_I2C::Write (short) %x", (bool)(result == 0))
Yann 0:21c698aa86f6 146 return (bool)(result == 0);
Yann 0:21c698aa86f6 147 }
Yann 0:21c698aa86f6 148
Yann 0:21c698aa86f6 149 bool C24LCXX_I2C::Write(const short p_address, const int p_int, const C24LCXX_I2C::Mode p_mode) {
Yann 0:21c698aa86f6 150 DEBUG_ENTER("C24LCXX_I2C::Write (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
Yann 0:21c698aa86f6 151
Yann 0:21c698aa86f6 152 // 1.Prepare buffer
Yann 0:21c698aa86f6 153 char i2cBuffer[6]; // Memory address + one integer (4 bytes)
Yann 0:21c698aa86f6 154 // 1.1. Memory address
charly 3:fc3eb4d2b07e 155 //short address = p_address + 1; // Index start to 1
charly 3:fc3eb4d2b07e 156 short address = p_address; // no Index+1
Yann 0:21c698aa86f6 157 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 158 DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 159 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 160 DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 161 // 1.2. Datas
Yann 0:21c698aa86f6 162 if (p_mode == BigEndian) {
Yann 0:21c698aa86f6 163 i2cBuffer[2] = (unsigned char)(p_int >> 24);
Yann 0:21c698aa86f6 164 i2cBuffer[3] = (unsigned char)(p_int >> 16);
Yann 0:21c698aa86f6 165 i2cBuffer[4] = (unsigned char)(p_int >> 8);
Yann 0:21c698aa86f6 166 i2cBuffer[5] = (unsigned char)((unsigned char)p_int & 0xff);
Yann 0:21c698aa86f6 167 } else {
Yann 0:21c698aa86f6 168 i2cBuffer[2] = (unsigned char)((unsigned char)p_int & 0xff);
Yann 0:21c698aa86f6 169 i2cBuffer[3] = (unsigned char)(p_int >> 8);
Yann 0:21c698aa86f6 170 i2cBuffer[4] = (unsigned char)(p_int >> 16);
Yann 0:21c698aa86f6 171 i2cBuffer[5] = (unsigned char)(p_int >> 24);
Yann 0:21c698aa86f6 172 }
Yann 0:21c698aa86f6 173 DEBUG("C24LCXX_I2C::Write (int): value=0x%02x%02x%02x%02x", i2cBuffer[2], i2cBuffer[3], i2cBuffer[4], i2cBuffer[5])
Yann 0:21c698aa86f6 174
Yann 0:21c698aa86f6 175 // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
Yann 0:21c698aa86f6 176 int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 6);
Yann 0:21c698aa86f6 177 wait(0.02);
Yann 0:21c698aa86f6 178
Yann 0:21c698aa86f6 179 DEBUG_LEAVE("C24LCXX_I2C::Write (int) %x", (bool)(result == 0))
Yann 0:21c698aa86f6 180 return (bool)(result == 0);
Yann 0:21c698aa86f6 181 }
Yann 0:21c698aa86f6 182
Yann 0:21c698aa86f6 183 bool C24LCXX_I2C::Write(const short p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write) {
Yann 0:21c698aa86f6 184 DEBUG_ENTER("C24LCXX_I2C::Write (std::string)")
Yann 0:21c698aa86f6 185 return Write(p_address, p_string.c_str(), p_storeLength, p_length2write);
Yann 0:21c698aa86f6 186 }
Yann 0:21c698aa86f6 187
Yann 0:21c698aa86f6 188 bool C24LCXX_I2C::Write(const short p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write) {
Yann 0:21c698aa86f6 189 DEBUG_ENTER("C24LCXX_I2C::Write (std::vector)")
Yann 0:21c698aa86f6 190
Yann 0:21c698aa86f6 191 int length = (p_length2write == -1) ? p_datas.size() : p_length2write;
Yann 0:21c698aa86f6 192 unsigned char array[length];
Yann 0:21c698aa86f6 193 std::copy(p_datas.begin(), p_datas.end(), array);
Yann 0:21c698aa86f6 194 bool result = Write(p_address, array, p_storeLength, length);
Yann 0:21c698aa86f6 195 wait(0.02);
Yann 0:21c698aa86f6 196
Yann 0:21c698aa86f6 197 DEBUG_LEAVE("C24LCXX_I2C::Write (std::vector): %d", result)
Yann 0:21c698aa86f6 198 return result;
Yann 0:21c698aa86f6 199 }
Yann 0:21c698aa86f6 200
Yann 0:21c698aa86f6 201 bool C24LCXX_I2C::Write(const short p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
Yann 0:21c698aa86f6 202 DEBUG_ENTER("C24LCXX_I2C::Write (char *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
Yann 0:21c698aa86f6 203
Yann 0:21c698aa86f6 204 // 1.Prepare buffer
Yann 0:21c698aa86f6 205 int length = (p_length2write == -1) ? strlen(p_datas) : p_length2write;
Yann 0:21c698aa86f6 206 if (p_storeLength) {
Yann 0:21c698aa86f6 207 length += 4; // Add four bytes for the length as integer
Yann 0:21c698aa86f6 208 }
Yann 0:21c698aa86f6 209 DEBUG("C24LCXX_I2C::Write (char *): length:%d", length)
Yann 0:21c698aa86f6 210
Yann 0:21c698aa86f6 211 char i2cBuffer[2 + length];
Yann 0:21c698aa86f6 212 // 1.1. Memory address
charly 3:fc3eb4d2b07e 213 //short address = p_address + 1; // Index start to 1
charly 3:fc3eb4d2b07e 214 short address = p_address; // no Index+1
Yann 0:21c698aa86f6 215 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 216 DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 217 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 218 DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 219 // 1.2. Datas
Yann 0:21c698aa86f6 220 if (p_storeLength) {
Yann 0:21c698aa86f6 221 // Fill the length
Yann 0:21c698aa86f6 222 i2cBuffer[2] = (unsigned char)(length >> 24);
Yann 0:21c698aa86f6 223 i2cBuffer[3] = (unsigned char)(length >> 16);
Yann 0:21c698aa86f6 224 i2cBuffer[4] = (unsigned char)(length >> 8);
Yann 0:21c698aa86f6 225 i2cBuffer[5] = (unsigned char)((unsigned char)length & 0xff);
Yann 0:21c698aa86f6 226 for (int i = 0; i < length - 4; i++) {
Yann 0:21c698aa86f6 227 i2cBuffer[6 + i] = *(p_datas + i);
Yann 0:21c698aa86f6 228 }
Yann 0:21c698aa86f6 229 } else { // The length was not stored
Yann 0:21c698aa86f6 230 for (int i = 0; i < length; i++) {
Yann 0:21c698aa86f6 231 i2cBuffer[2 + i] = *(p_datas + i);
Yann 0:21c698aa86f6 232 }
Yann 0:21c698aa86f6 233 }
Yann 0:21c698aa86f6 234
Yann 0:21c698aa86f6 235 // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
Yann 0:21c698aa86f6 236 int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 2 + length);
Yann 0:21c698aa86f6 237 wait(0.02);
Yann 0:21c698aa86f6 238
Yann 0:21c698aa86f6 239 DEBUG_LEAVE("C24LCXX_I2C::Write (char *) %x", (bool)(result == 0))
Yann 0:21c698aa86f6 240 return (bool)(result == 0);
Yann 0:21c698aa86f6 241 }
Yann 0:21c698aa86f6 242
Yann 0:21c698aa86f6 243 bool C24LCXX_I2C::Write(const short p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write) {
Yann 0:21c698aa86f6 244 DEBUG_ENTER("C24LCXX_I2C::Write (byte *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
Yann 0:21c698aa86f6 245 return Write(p_address, (const char *)p_datas, p_storeLength, p_length2write);
Yann 0:21c698aa86f6 246 }
Yann 0:21c698aa86f6 247
Yann 0:21c698aa86f6 248 bool C24LCXX_I2C::Read(const short p_address, unsigned char * p_byte) {
Yann 0:21c698aa86f6 249 DEBUG_ENTER("C24LCXX_I2C::Read (byte): Memory address:0x%02x", p_address)
Yann 0:21c698aa86f6 250
Yann 0:21c698aa86f6 251 // 1.Prepare buffer
Yann 0:21c698aa86f6 252 char i2cBuffer[2];
Yann 0:21c698aa86f6 253 // 1.1. Memory address
Yann 0:21c698aa86f6 254 i2cBuffer[0] = (unsigned char)(p_address >> 8);
Yann 0:21c698aa86f6 255 DEBUG("C24LCXX_I2C::Read (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 256 i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
Yann 0:21c698aa86f6 257 DEBUG("C24LCXX_I2C::Read (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 258
Yann 0:21c698aa86f6 259 // 2. Send I2C start + memory address
Yann 0:21c698aa86f6 260 if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
Yann 0:21c698aa86f6 261 wait(0.02);
Yann 0:21c698aa86f6 262 DEBUG("C24LCXX_I2C::Read (byte): Write memory done")
Yann 0:21c698aa86f6 263 // 2. Read data + I2C stop
Yann 0:21c698aa86f6 264 int result = _i2cInstance->read(_slaveAddress, (char *)p_byte, 1);
Yann 0:21c698aa86f6 265 wait(0.02);
Yann 0:21c698aa86f6 266
Yann 0:21c698aa86f6 267 DEBUG_LEAVE("C24LCXX_I2C::Read (byte): %x", (bool)(result == 0))
Yann 0:21c698aa86f6 268 return (bool)(result == 0);
Yann 0:21c698aa86f6 269 }
Yann 0:21c698aa86f6 270
Yann 0:21c698aa86f6 271 DEBUG_LEAVE("C24LCXX_I2C::Read (byte) (false)")
Yann 0:21c698aa86f6 272 return false;
Yann 0:21c698aa86f6 273 }
Yann 0:21c698aa86f6 274
Yann 0:21c698aa86f6 275 bool C24LCXX_I2C::Read(const short p_address, short *p_short, const C24LCXX_I2C::Mode p_mode) {
Yann 0:21c698aa86f6 276 DEBUG_ENTER("C24LCXX_I2C::Read (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
Yann 0:21c698aa86f6 277
Yann 0:21c698aa86f6 278 // 1.Prepare buffer
Yann 0:21c698aa86f6 279 char i2cBuffer[2];
Yann 0:21c698aa86f6 280 // 1.1. Memory address
Yann 0:21c698aa86f6 281 i2cBuffer[0] = (unsigned char)(p_address >> 8);
Yann 0:21c698aa86f6 282 DEBUG("C24LCXX_I2C::Read (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 283 i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
Yann 0:21c698aa86f6 284 DEBUG("C24LCXX_I2C::Read (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 285
Yann 0:21c698aa86f6 286 // 2. Send I2C start + memory address
Yann 0:21c698aa86f6 287 if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
Yann 0:21c698aa86f6 288 wait(0.02);
Yann 0:21c698aa86f6 289 DEBUG("C24LCXX_I2C::Read (short): Write memory done")
Yann 0:21c698aa86f6 290 // 2. Read data + I2C stop
Yann 0:21c698aa86f6 291 int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
Yann 0:21c698aa86f6 292 if (result == 0) {
Yann 0:21c698aa86f6 293 DEBUG("C24LCXX_I2C::Read (short): value: 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1])
Yann 0:21c698aa86f6 294 if (p_mode == BigEndian) {
Yann 0:21c698aa86f6 295 *p_short = (short)(i2cBuffer[0] << 8 | i2cBuffer[1]);
Yann 0:21c698aa86f6 296 } else {
Yann 0:21c698aa86f6 297 *p_short = (short)(i2cBuffer[1] << 8 | i2cBuffer[0]);
Yann 0:21c698aa86f6 298 }
Yann 0:21c698aa86f6 299
Yann 0:21c698aa86f6 300 DEBUG_LEAVE("C24LCXX_I2C::Read (short): 0x%04x", *p_short)
Yann 0:21c698aa86f6 301 return true;
Yann 0:21c698aa86f6 302 }
Yann 0:21c698aa86f6 303 }
Yann 0:21c698aa86f6 304
Yann 0:21c698aa86f6 305 DEBUG_LEAVE("C24LCXX_I2C::Read (short) (false)")
Yann 0:21c698aa86f6 306 return false;
Yann 0:21c698aa86f6 307 }
Yann 0:21c698aa86f6 308
Yann 0:21c698aa86f6 309 bool C24LCXX_I2C::Read(const short p_address, int *p_int, const C24LCXX_I2C::Mode p_mode) {
Yann 0:21c698aa86f6 310 DEBUG_ENTER("C24LCXX_I2C::Read (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
Yann 0:21c698aa86f6 311
Yann 0:21c698aa86f6 312 // 1.Prepare buffer
Yann 0:21c698aa86f6 313 char i2cBuffer[4];
Yann 0:21c698aa86f6 314 // 1.1. Memory address
Yann 0:21c698aa86f6 315 i2cBuffer[0] = (unsigned char)(p_address >> 8);
Yann 0:21c698aa86f6 316 DEBUG("C24LCXX_I2C::Read (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 317 i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
Yann 0:21c698aa86f6 318 DEBUG("C24LCXX_I2C::Read (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 319
Yann 0:21c698aa86f6 320 // 2. Send I2C start + memory address
Yann 0:21c698aa86f6 321 if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
Yann 0:21c698aa86f6 322 wait(0.02);
Yann 0:21c698aa86f6 323 DEBUG("C24LCXX_I2C::Read (int): Write memory done")
Yann 0:21c698aa86f6 324 // 2. Read data + I2C stop
Yann 0:21c698aa86f6 325 int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
Yann 0:21c698aa86f6 326 if (result == 0) {
Yann 0:21c698aa86f6 327 DEBUG("C24LCXX_I2C::Read (int): value: 0x%02x - 0x%02x - 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1], i2cBuffer[2], i2cBuffer[3])
Yann 0:21c698aa86f6 328 wait(0.02);
Yann 0:21c698aa86f6 329 if (p_mode == BigEndian) {
Yann 0:21c698aa86f6 330 *p_int = (int)(i2cBuffer[0] << 24 | i2cBuffer[1] << 16 | i2cBuffer[2] << 8 | i2cBuffer[3]);
Yann 0:21c698aa86f6 331 } else {
Yann 0:21c698aa86f6 332 *p_int = (int)(i2cBuffer[3] << 24 | i2cBuffer[2] << 16 | i2cBuffer[1] << 8 | i2cBuffer[0]);
Yann 0:21c698aa86f6 333 }
Yann 0:21c698aa86f6 334
Yann 0:21c698aa86f6 335 DEBUG_LEAVE("C24LCXX_I2C::Read (int): %d", *p_int)
Yann 0:21c698aa86f6 336 return true;
Yann 0:21c698aa86f6 337 }
Yann 0:21c698aa86f6 338
Yann 0:21c698aa86f6 339 DEBUG_LEAVE("C24LCXX_I2C::Read (int):false")
Yann 0:21c698aa86f6 340 return false;
Yann 0:21c698aa86f6 341 }
Yann 0:21c698aa86f6 342
Yann 0:21c698aa86f6 343 DEBUG_LEAVE("C24LCXX_I2C::Read (int) (false)")
Yann 0:21c698aa86f6 344 return false;
Yann 0:21c698aa86f6 345 }
Yann 0:21c698aa86f6 346
Yann 0:21c698aa86f6 347 bool C24LCXX_I2C::Read(const short p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write) {
Yann 0:21c698aa86f6 348 DEBUG_ENTER("C24LCXX_I2C::Read (vector): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
Yann 0:21c698aa86f6 349
Yann 0:21c698aa86f6 350 // 1.Prepare buffer
Yann 0:21c698aa86f6 351 short address = p_address;
Yann 0:21c698aa86f6 352 int length = 0;
Yann 0:21c698aa86f6 353 if (p_readLengthFirst) {
Yann 0:21c698aa86f6 354 if (!Read(address, &length)) { // Read the length in big endian mode
Yann 0:21c698aa86f6 355 DEBUG_LEAVE("C24LCXX_I2C::Read (vector) Failed to read length")
Yann 0:21c698aa86f6 356 return false;
Yann 0:21c698aa86f6 357 }
Yann 0:21c698aa86f6 358 DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
Yann 0:21c698aa86f6 359 if (length == 0) {
Yann 0:21c698aa86f6 360 return true;
Yann 0:21c698aa86f6 361 }
Yann 0:21c698aa86f6 362 address += 4; // Skip the length value
Yann 0:21c698aa86f6 363 length -= 4; // length is the size of (string length + string)
Yann 0:21c698aa86f6 364 } else {
Yann 0:21c698aa86f6 365 if (p_length2write == -1) {
Yann 0:21c698aa86f6 366 length = p_datas.size();
Yann 0:21c698aa86f6 367 } else {
Yann 0:21c698aa86f6 368 length = p_length2write;
Yann 0:21c698aa86f6 369 }
Yann 0:21c698aa86f6 370 }
Yann 0:21c698aa86f6 371 DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
Yann 0:21c698aa86f6 372
Yann 0:21c698aa86f6 373 // 2. Memory address
Yann 0:21c698aa86f6 374 char i2cBuffer[2];
Yann 0:21c698aa86f6 375 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 376 DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 377 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 378 DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 379
Yann 0:21c698aa86f6 380 // 3. Send I2C start + memory address
Yann 0:21c698aa86f6 381 if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
Yann 0:21c698aa86f6 382 wait(0.02);
Yann 0:21c698aa86f6 383 DEBUG("C24LCXX_I2C::Read (vector): Write memory done")
Yann 0:21c698aa86f6 384 // 4. read data + I2C stop
Yann 0:21c698aa86f6 385 unsigned char buffer[length];
Yann 0:21c698aa86f6 386 int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
Yann 0:21c698aa86f6 387 wait(0.02);
Yann 0:21c698aa86f6 388 if (result == 0) {
Yann 0:21c698aa86f6 389 p_datas.assign(buffer, buffer + length);
Yann 0:21c698aa86f6 390
Yann 0:21c698aa86f6 391 DEBUG_LEAVE("C24LCXX_I2C::Read (vector): %x", (bool)(result == 0))
Yann 0:21c698aa86f6 392 return (bool)(result == 0);
Yann 0:21c698aa86f6 393 }
Yann 0:21c698aa86f6 394 }
Yann 0:21c698aa86f6 395
Yann 0:21c698aa86f6 396 DEBUG_LEAVE("C24LCXX_I2C::Read (vector) (false)")
Yann 0:21c698aa86f6 397 return false;
Yann 0:21c698aa86f6 398 }
Yann 0:21c698aa86f6 399
Yann 0:21c698aa86f6 400 bool C24LCXX_I2C::Read(const short p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write) {
Yann 0:21c698aa86f6 401 DEBUG_ENTER("C24LCXX_I2C::Read (string): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
Yann 0:21c698aa86f6 402
Yann 0:21c698aa86f6 403 /* std::vector<unsigned char> datas;
Yann 0:21c698aa86f6 404 if (Read(p_address, datas, p_readLengthFirst, p_length2write) == true) {
Yann 0:21c698aa86f6 405 p_string.assign((char *)datas.begin(), datas.size());
Yann 0:21c698aa86f6 406
Yann 0:21c698aa86f6 407 return true;
Yann 0:21c698aa86f6 408 }
Yann 0:21c698aa86f6 409
Yann 0:21c698aa86f6 410 DEBUG_LEAVE("C24LCXX_I2C::Read (string) (false)")
Yann 0:21c698aa86f6 411 return false;
Yann 0:21c698aa86f6 412 */
Yann 0:21c698aa86f6 413
Yann 0:21c698aa86f6 414 // 1.Prepare buffer
Yann 0:21c698aa86f6 415 short address = p_address;
Yann 0:21c698aa86f6 416 int length = -1;
Yann 0:21c698aa86f6 417 if (p_readLengthFirst) { // The string was stored with its length
Yann 0:21c698aa86f6 418 if (!Read(address, &length)) { // Read the length as integer in big endian mode
Yann 0:21c698aa86f6 419 DEBUG_ERROR("C24LCXX_I2C::Read (string): Failed to read length")
Yann 0:21c698aa86f6 420 return false;
Yann 0:21c698aa86f6 421 }
Yann 0:21c698aa86f6 422 wait(0.02);
Yann 0:21c698aa86f6 423 DEBUG("C24LCXX_I2C::Read (string): length=%d", length)
Yann 0:21c698aa86f6 424 if (length == 0) {
Yann 0:21c698aa86f6 425 DEBUG_ERROR("C24LCXX_I2C::Read (string): empty")
Yann 0:21c698aa86f6 426 return true;
Yann 0:21c698aa86f6 427 }
Yann 0:21c698aa86f6 428 address += 4; // Skip the length value size
Yann 0:21c698aa86f6 429 length -= 4; // length is the size of (string length + string)
Yann 0:21c698aa86f6 430 } else { // The string length is provided by p_length2write parameter
Yann 0:21c698aa86f6 431 if (p_length2write == -1) {
Yann 0:21c698aa86f6 432 length = p_string.size();
Yann 0:21c698aa86f6 433 } else {
Yann 0:21c698aa86f6 434 length = p_length2write;
Yann 0:21c698aa86f6 435 p_string.resize(p_length2write);
Yann 0:21c698aa86f6 436 }
Yann 0:21c698aa86f6 437 }
Yann 0:21c698aa86f6 438 DEBUG("C24LCXX_I2C::Read (string): Address=0x%02x - Length=%d", address, length)
Yann 0:21c698aa86f6 439
Yann 0:21c698aa86f6 440 // 2. Memory address
Yann 0:21c698aa86f6 441 char i2cBuffer[2];
Yann 0:21c698aa86f6 442 i2cBuffer[0] = (unsigned char)(address >> 8);
Yann 0:21c698aa86f6 443 DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
Yann 0:21c698aa86f6 444 i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
Yann 0:21c698aa86f6 445 DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
Yann 0:21c698aa86f6 446
Yann 0:21c698aa86f6 447 // 3. Send I2C start + memory address with repeat start
Yann 0:21c698aa86f6 448 if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
Yann 0:21c698aa86f6 449 wait(0.02);
Yann 0:21c698aa86f6 450 DEBUG("C24LCXX_I2C::Read (string): Write memory done")
Yann 0:21c698aa86f6 451 // 4. Read data + I2C stop
Yann 0:21c698aa86f6 452 char buffer[length];
Yann 0:21c698aa86f6 453 int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
Yann 0:21c698aa86f6 454 if (result == 0) {
Yann 0:21c698aa86f6 455 p_string.assign(buffer, length);
Yann 0:21c698aa86f6 456
Yann 0:21c698aa86f6 457 return true;
Yann 0:21c698aa86f6 458 }
Yann 0:21c698aa86f6 459 }
Yann 0:21c698aa86f6 460
Yann 0:21c698aa86f6 461 DEBUG_LEAVE("C24LCXX_I2C::Read (string) (false)")
Yann 0:21c698aa86f6 462 return false;
Yann 0:21c698aa86f6 463 }
Yann 0:21c698aa86f6 464
Yann 0:21c698aa86f6 465 #if defined(__DEBUG)
Yann 0:21c698aa86f6 466 void C24LCXX_I2C::DumpMemoryArea(const int p_address, const int p_count) {
Yann 0:21c698aa86f6 467 DEBUG_ENTER("C24LCXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)
Yann 0:21c698aa86f6 468
Yann 0:21c698aa86f6 469 DEBUG("C24LCXX_I2C::DumpMemoryArea: Reading datas...");
Yann 0:21c698aa86f6 470 std::vector<unsigned char> datas(p_count);
Yann 0:21c698aa86f6 471 if (!Read(p_address, datas, false)) { // Read bytes, including the lenght indication, buffer size is not set before the call
Yann 0:21c698aa86f6 472 std::cout << "C24LCXX_I2C::DumpMemoryArea: read failed\r" << std::endl;
Yann 0:21c698aa86f6 473 } else {
Yann 0:21c698aa86f6 474 std::cout << "C24LCXX_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
Yann 0:21c698aa86f6 475 HEXADUMP(&datas[0], p_count);
Yann 0:21c698aa86f6 476 std::cout << "\r" << std::endl;
Yann 0:21c698aa86f6 477 }
Yann 0:21c698aa86f6 478 }
Yann 0:21c698aa86f6 479 #endif // _DEBUG
Yann 0:21c698aa86f6 480
Yann 0:21c698aa86f6 481 } // End of namespace _24LCXX_I2C