24LCxx_I2C.cpp

00001 /* mbed simplified access to Microchip 24LCxx Serial EEPROM devices (I2C)
00002  * Copyright (c) 2010-2012 ygarcia, MIT License
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
00005  * and associated documentation files (the "Software"), to deal in the Software without restriction, 
00006  * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
00007  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
00008  * furnished to do so, subject to the following conditions:
00009  *
00010  * The above copyright notice and this permission notice shall be included in all copies or 
00011  * substantial portions of the Software.
00012  *
00013  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
00014  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
00015  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
00016  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
00017  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00018  */
00019 #include <iostream>
00020 #include <sstream>
00021 
00022 #include "24LCxx_I2C.h"
00023 
00024 namespace _24LCXX_I2C {
00025 
00026     unsigned char C24LCXX_I2C::I2CModuleRefCounter = 0;
00027 
00028     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("") {
00029         DEBUG_ENTER("C24LCXX_I2C")
00030 
00031         if (C24LCXX_I2C::I2CModuleRefCounter != 0) {
00032             error("C24LCXX_I2C: Wrong params");
00033         }
00034 #ifdef __DEBUG
00035         std::ostringstream out(std::ostringstream::out);
00036         out << "C24LCXX_I2C #" << C24LCXX_I2C::I2CModuleRefCounter;
00037         _internalId.assign(out.str());
00038         DEBUG("C24LCXX_I2C: _internalId='%s'", _internalId.c_str())
00039 #endif // __DEBUG
00040         _i2cInstance = new I2C(p_sda, p_scl, "24LCxx_I2C");
00041         C24LCXX_I2C::I2CModuleRefCounter += 1;
00042         DEBUG_ENTER("C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
00043 
00044         _slaveAddress = (p_address << 1) | 0xa0; // Slave address format is: 1 0 1 0 A3 A2 A1 R/W
00045         DEBUG("C24LCXX_I2C: I2C slave adress:  0x%02x", _slaveAddress)
00046         _i2cInstance->frequency(p_frequency); // Set the frequency of the I2C interface
00047         if (p_wp != NC) {
00048             DEBUG("C24LCXX_I2C: WP managed");
00049             _wp = new DigitalOut(p_wp);
00050             _wp->write(0); // Disable write protect
00051         } else {
00052             DEBUG("C24LCXX_I2C: WP not managed");
00053             _wp = NULL; // Not used
00054         }
00055     
00056         DEBUG_LEAVE("C24LCXX_I2C")
00057     }
00058 
00059     C24LCXX_I2C::~C24LCXX_I2C() {
00060         DEBUG_ENTER("~C24LCXX_I2C")
00061     
00062         // Release I2C instance
00063         DEBUG_ENTER("~C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
00064         C24LCXX_I2C::I2CModuleRefCounter -= 1;
00065         if (C24LCXX_I2C::I2CModuleRefCounter == 0) {
00066             delete _i2cInstance;
00067             _i2cInstance = NULL;
00068         }
00069         // Release _wp if required
00070         if (_wp != NULL) {
00071             _wp->write(0);
00072             delete _wp;
00073         }
00074     
00075         DEBUG_LEAVE("~C24LCXX_I2C")
00076     }
00077     
00078     bool C24LCXX_I2C::WriteProtect(const bool p_writeProtect) {
00079         if (_wp != NULL) {
00080             DEBUG("WP set to: %x", (int)p_writeProtect)
00081             _wp->write((int)(p_writeProtect));
00082             return true;
00083         }
00084     
00085         return false;
00086     }
00087 
00088     bool C24LCXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern) {
00089         DEBUG_ENTER("C24LCXX_I2C::EraseMemoryArea: 0x%02x - %d - 0x%02x", p_startAddress, p_count, p_pattern)
00090     
00091         std::vector<unsigned char> eraseBuffer(p_count, p_pattern);
00092         return Write(p_startAddress, eraseBuffer, false);
00093     }
00094 
00095     bool C24LCXX_I2C::Write(const short p_address, const unsigned char p_byte) {
00096         DEBUG_ENTER("C24LCXX_I2C::Write (byte): Memory address: 0x%02x - 0x%02x", p_address, p_byte)
00097     
00098         // 1.Prepare buffer
00099         char i2cBuffer[3]; // Memory address + one byte of data
00100         // 1.1. Memory address
00101         short address = p_address + 1; // Index start to 1
00102         i2cBuffer[0] = (unsigned char)(address >> 8);
00103         DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00104         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00105         DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00106         // 1.2. Datas
00107         i2cBuffer[2] = p_byte;
00108         DEBUG("C24LCXX_I2C::Write (byte): value=0x%02x", i2cBuffer[2])
00109     
00110         // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
00111         int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 3);
00112         wait(0.02);
00113     
00114         DEBUG_LEAVE("C24LCXX_I2C::Write (byte) %x", (bool)(result == 0))
00115         return (bool)(result == 0);
00116     }
00117     
00118     bool C24LCXX_I2C::Write(const short p_address, const short p_short, const C24LCXX_I2C::Mode p_mode) {
00119         DEBUG_ENTER("C24LCXX_I2C::Write (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
00120     
00121         // 1.Prepare buffer
00122         char i2cBuffer[4]; // Memory address + one short (2 bytes)
00123         // 1.1. Memory address
00124         short address = p_address + 1; // Index start to 1
00125         i2cBuffer[0] = (unsigned char)(address >> 8);
00126         DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00127         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00128         DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00129         // 1.2. Datas
00130         if (p_mode == BigEndian) {
00131             i2cBuffer[2] = (unsigned char)(p_short >> 8);
00132             i2cBuffer[3] = (unsigned char)((unsigned char)p_short & 0xff);
00133         } else {
00134             i2cBuffer[2] = (unsigned char)((unsigned char)p_short & 0xff);
00135             i2cBuffer[3] = (unsigned char)(p_short >> 8);
00136         }
00137         DEBUG("C24LCXX_I2C::Write (short): value=0x%02x%02x", i2cBuffer[2], i2cBuffer[3])
00138     
00139         // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
00140         int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 4);
00141         wait(0.02);
00142     
00143         DEBUG_LEAVE("C24LCXX_I2C::Write (short) %x", (bool)(result == 0))
00144         return (bool)(result == 0);
00145     }
00146     
00147     bool C24LCXX_I2C::Write(const short p_address, const int p_int, const C24LCXX_I2C::Mode p_mode) {
00148         DEBUG_ENTER("C24LCXX_I2C::Write (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
00149     
00150         // 1.Prepare buffer
00151         char i2cBuffer[6]; // Memory address + one integer (4 bytes)
00152         // 1.1. Memory address
00153         short address = p_address + 1; // Index start to 1
00154         i2cBuffer[0] = (unsigned char)(address >> 8);
00155         DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00156         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00157         DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00158         // 1.2. Datas
00159         if (p_mode == BigEndian) {
00160             i2cBuffer[2] = (unsigned char)(p_int >> 24);
00161             i2cBuffer[3] = (unsigned char)(p_int >> 16);
00162             i2cBuffer[4] = (unsigned char)(p_int >> 8);
00163             i2cBuffer[5] = (unsigned char)((unsigned char)p_int & 0xff);
00164         } else {
00165             i2cBuffer[2] = (unsigned char)((unsigned char)p_int & 0xff);
00166             i2cBuffer[3] = (unsigned char)(p_int >> 8);
00167             i2cBuffer[4] = (unsigned char)(p_int >> 16);
00168             i2cBuffer[5] = (unsigned char)(p_int >> 24);
00169         }
00170         DEBUG("C24LCXX_I2C::Write (int): value=0x%02x%02x%02x%02x", i2cBuffer[2], i2cBuffer[3], i2cBuffer[4], i2cBuffer[5])
00171     
00172         // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
00173         int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 6);
00174         wait(0.02);
00175     
00176         DEBUG_LEAVE("C24LCXX_I2C::Write (int) %x", (bool)(result == 0))
00177         return (bool)(result == 0);
00178     }
00179     
00180     bool C24LCXX_I2C::Write(const short p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write) {
00181         DEBUG_ENTER("C24LCXX_I2C::Write (std::string)")
00182         return Write(p_address, p_string.c_str(), p_storeLength, p_length2write);
00183     }
00184     
00185     bool C24LCXX_I2C::Write(const short p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write) {
00186         DEBUG_ENTER("C24LCXX_I2C::Write (std::vector)")
00187     
00188         int length = (p_length2write == -1) ? p_datas.size() : p_length2write;
00189         unsigned char array[length];
00190         std::copy(p_datas.begin(), p_datas.end(), array);
00191         bool result = Write(p_address, array, p_storeLength, length);
00192         wait(0.02);
00193     
00194         DEBUG_LEAVE("C24LCXX_I2C::Write (std::vector): %d", result)
00195         return result;
00196     }
00197     
00198     bool C24LCXX_I2C::Write(const short p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
00199         DEBUG_ENTER("C24LCXX_I2C::Write (char *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
00200     
00201         // 1.Prepare buffer
00202         int length = (p_length2write == -1) ? strlen(p_datas) : p_length2write;
00203         if (p_storeLength) {
00204             length += 4; // Add four bytes for the length as integer
00205         }
00206         DEBUG("C24LCXX_I2C::Write (char *): length:%d", length)
00207         
00208         char i2cBuffer[2 + length];
00209         // 1.1. Memory address
00210         short address = p_address + 1;
00211         i2cBuffer[0] = (unsigned char)(address >> 8);
00212         DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00213         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00214         DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00215         // 1.2. Datas
00216         if (p_storeLength) {
00217             // Fill the length
00218             i2cBuffer[2] = (unsigned char)(length >> 24);
00219             i2cBuffer[3] = (unsigned char)(length >> 16);
00220             i2cBuffer[4] = (unsigned char)(length >> 8);
00221             i2cBuffer[5] = (unsigned char)((unsigned char)length & 0xff);
00222             for (int i = 0; i < length - 4; i++) {
00223                 i2cBuffer[6 + i] = *(p_datas + i);
00224             }
00225         } else { // The length was not stored
00226             for (int i = 0; i < length; i++) {
00227                 i2cBuffer[2 + i] = *(p_datas + i);
00228             }
00229         }
00230         
00231         // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
00232         int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 2 + length);
00233         wait(0.02);
00234     
00235         DEBUG_LEAVE("C24LCXX_I2C::Write (char *) %x", (bool)(result == 0))
00236         return (bool)(result == 0);
00237     }
00238     
00239     bool C24LCXX_I2C::Write(const short p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write) {
00240         DEBUG_ENTER("C24LCXX_I2C::Write (byte *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
00241         return Write(p_address, (const char *)p_datas, p_storeLength, p_length2write);
00242     }
00243     
00244     bool C24LCXX_I2C::Read(const short p_address, unsigned char * p_byte) {
00245         DEBUG_ENTER("C24LCXX_I2C::Read (byte): Memory address:0x%02x", p_address)
00246     
00247         // 1.Prepare buffer
00248         char i2cBuffer[2];
00249         // 1.1. Memory address
00250         i2cBuffer[0] = (unsigned char)(p_address >> 8);
00251         DEBUG("C24LCXX_I2C::Read (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00252         i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
00253         DEBUG("C24LCXX_I2C::Read (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00254     
00255         // 2. Send I2C start + memory address
00256         if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
00257             wait(0.02);
00258             DEBUG("C24LCXX_I2C::Read (byte): Write memory done")
00259             // 2. Read data + I2C stop
00260             int result = _i2cInstance->read(_slaveAddress, (char *)p_byte, 1);
00261             wait(0.02);
00262     
00263             DEBUG_LEAVE("C24LCXX_I2C::Read (byte): %x", (bool)(result == 0))
00264             return (bool)(result == 0);
00265         }
00266     
00267         DEBUG_LEAVE("C24LCXX_I2C::Read (byte) (false)")
00268         return false;
00269     }
00270     
00271     bool C24LCXX_I2C::Read(const short p_address, short *p_short, const C24LCXX_I2C::Mode p_mode) {
00272         DEBUG_ENTER("C24LCXX_I2C::Read (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
00273     
00274         // 1.Prepare buffer
00275         char i2cBuffer[2];
00276         // 1.1. Memory address
00277         i2cBuffer[0] = (unsigned char)(p_address >> 8);
00278         DEBUG("C24LCXX_I2C::Read (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00279         i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
00280         DEBUG("C24LCXX_I2C::Read (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00281     
00282         // 2. Send I2C start + memory address
00283         if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
00284             wait(0.02);
00285             DEBUG("C24LCXX_I2C::Read (short): Write memory done")
00286             // 2. Read data + I2C stop
00287             int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
00288             if (result == 0) {
00289 DEBUG("C24LCXX_I2C::Read (short): value: 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1])
00290                 if (p_mode ==  BigEndian) {
00291                     *p_short = (short)(i2cBuffer[0] << 8 | i2cBuffer[1]);
00292                 } else {
00293                     *p_short = (short)(i2cBuffer[1] << 8 | i2cBuffer[0]);
00294                 }
00295         
00296                 DEBUG_LEAVE("C24LCXX_I2C::Read (short): 0x%04x", *p_short)
00297                 return true;
00298             }
00299         }
00300     
00301         DEBUG_LEAVE("C24LCXX_I2C::Read (short) (false)")
00302         return false;
00303     }
00304     
00305     bool C24LCXX_I2C::Read(const short p_address, int *p_int, const C24LCXX_I2C::Mode p_mode) {
00306         DEBUG_ENTER("C24LCXX_I2C::Read (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
00307     
00308         // 1.Prepare buffer
00309         char i2cBuffer[4];
00310         // 1.1. Memory address
00311         i2cBuffer[0] = (unsigned char)(p_address >> 8);
00312         DEBUG("C24LCXX_I2C::Read (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00313         i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
00314         DEBUG("C24LCXX_I2C::Read (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00315     
00316         // 2. Send I2C start + memory address
00317         if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
00318             wait(0.02);
00319             DEBUG("C24LCXX_I2C::Read (int): Write memory done")
00320             // 2. Read data + I2C stop
00321             int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
00322             if (result == 0) {
00323 DEBUG("C24LCXX_I2C::Read (int): value: 0x%02x - 0x%02x - 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1], i2cBuffer[2], i2cBuffer[3])
00324                 wait(0.02);
00325                 if (p_mode ==  BigEndian) {
00326                     *p_int = (int)(i2cBuffer[0] << 24 | i2cBuffer[1] << 16 | i2cBuffer[2] << 8 | i2cBuffer[3]);
00327                 } else {
00328                     *p_int = (int)(i2cBuffer[3] << 24 | i2cBuffer[2] << 16 | i2cBuffer[1] << 8 | i2cBuffer[0]);
00329                 }
00330     
00331                 DEBUG_LEAVE("C24LCXX_I2C::Read (int): %d", *p_int)
00332                 return true;
00333             }
00334     
00335             DEBUG_LEAVE("C24LCXX_I2C::Read (int):false")
00336             return false;
00337         }
00338     
00339         DEBUG_LEAVE("C24LCXX_I2C::Read (int) (false)")
00340         return false;
00341     }
00342     
00343     bool C24LCXX_I2C::Read(const short p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write) {
00344         DEBUG_ENTER("C24LCXX_I2C::Read (vector): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
00345     
00346         // 1.Prepare buffer
00347         short address = p_address;
00348         int length = 0;
00349         if (p_readLengthFirst) {
00350             if (!Read(address, &length)) { // Read the length in big endian mode
00351                 DEBUG_LEAVE("C24LCXX_I2C::Read (vector) Failed to read length")
00352                 return false;
00353             }
00354             DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
00355             if (length == 0) {
00356                 return true;
00357             }
00358             address += 4; // Skip the length value 
00359             length -= 4; // length is the size of (string length + string)
00360         } else {
00361             if (p_length2write == -1) {
00362                 length = p_datas.size();
00363             } else {
00364                 length = p_length2write;
00365             }
00366         }
00367         DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
00368     
00369         // 2. Memory address
00370         char i2cBuffer[2];
00371         i2cBuffer[0] = (unsigned char)(address >> 8);
00372         DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00373         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00374         DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00375     
00376         // 3. Send I2C start + memory address
00377         if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
00378             wait(0.02);
00379             DEBUG("C24LCXX_I2C::Read (vector): Write memory done")
00380             // 4. read data + I2C stop
00381             unsigned char buffer[length];
00382             int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
00383             wait(0.02);
00384             if (result == 0) {
00385                 p_datas.assign(buffer, buffer + length);
00386     
00387                 DEBUG_LEAVE("C24LCXX_I2C::Read (vector): %x", (bool)(result == 0))
00388                 return (bool)(result == 0);
00389             }
00390         }
00391     
00392         DEBUG_LEAVE("C24LCXX_I2C::Read (vector) (false)")
00393         return false;
00394     }
00395     
00396     bool C24LCXX_I2C::Read(const short p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write) {
00397         DEBUG_ENTER("C24LCXX_I2C::Read (string): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
00398 
00399 /*        std::vector<unsigned char> datas;
00400         if (Read(p_address, datas, p_readLengthFirst, p_length2write) == true) {
00401             p_string.assign((char *)datas.begin(), datas.size());
00402             
00403             return true;
00404         }
00405         
00406         DEBUG_LEAVE("C24LCXX_I2C::Read (string) (false)")
00407         return false;
00408 */        
00409     
00410         // 1.Prepare buffer
00411         short address = p_address;
00412         int length = -1;
00413         if (p_readLengthFirst) { // The string was stored with its length
00414             if (!Read(address, &length)) { // Read the length as integer in big endian mode
00415                 DEBUG_ERROR("C24LCXX_I2C::Read (string): Failed to read length")
00416                 return false;
00417             }
00418             wait(0.02);
00419             DEBUG("C24LCXX_I2C::Read (string): length=%d", length)
00420             if (length == 0) {
00421                 DEBUG_ERROR("C24LCXX_I2C::Read (string): empty")
00422                 return true;
00423             }
00424             address += 4; // Skip the length value size 
00425             length -= 4; // length is the size of (string length + string)
00426         } else { // The string length is provided by p_length2write parameter
00427             if (p_length2write == -1) {
00428                 length = p_string.size();
00429             } else {
00430                 length = p_length2write;
00431                 p_string.resize(p_length2write);
00432             }
00433         }
00434         DEBUG("C24LCXX_I2C::Read (string): Address=0x%02x - Length=%d", address, length)
00435     
00436         // 2. Memory address
00437         char i2cBuffer[2];
00438         i2cBuffer[0] = (unsigned char)(address >> 8);
00439         DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
00440         i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
00441         DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
00442     
00443         // 3. Send I2C start + memory address with repeat start
00444         if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
00445             wait(0.02);
00446             DEBUG("C24LCXX_I2C::Read (string): Write memory done")
00447             // 4. Read data + I2C stop
00448             char buffer[length];
00449             int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
00450             if (result == 0) {
00451                 p_string.assign(buffer, length);
00452         
00453                 return true;
00454             }
00455         }
00456         
00457         DEBUG_LEAVE("C24LCXX_I2C::Read (string) (false)")
00458         return false;
00459     }
00460 
00461 #if defined(__DEBUG)
00462     void C24LCXX_I2C::DumpMemoryArea(const int p_address, const int p_count) {
00463         DEBUG_ENTER("C24LCXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)
00464     
00465         DEBUG("C24LCXX_I2C::DumpMemoryArea: Reading datas...");
00466         std::vector<unsigned char> datas(p_count);
00467         if (!Read(p_address, datas, false)) { // Read bytes, including the lenght indication, buffer size is not set before the call
00468             std::cout << "C24LCXX_I2C::DumpMemoryArea: read failed\r" << std::endl;
00469         } else {
00470             std::cout << "C24LCXX_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
00471             HEXADUMP(&datas[0], p_count);
00472             std::cout << "\r" << std::endl;
00473         }
00474     }
00475 #endif // _DEBUG
00476 
00477 } // End of namespace _24LCXX_I2C