Revision 0:fa858f79d48d, committed 2013-03-23

Comitter:

Yann

Date:

Sat Mar 23 15:54:01 2013 +0000

Child:

1:6a16bddd7222

Commit message:

Create library interface for FM24V10 1Mb Serial 3V F-RAM Memory (Requested by M. Reed Kimble)

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM24Vxx_I2C.cpp	Sat Mar 23 15:54:01 2013 +0000
@@ -0,0 +1,490 @@
+/* mbed simplified access to RAMTRON FV24xx Serial 3V F-RAM Memory (I2C)
+ * Copyright (c) 20103 ygarcia, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <iostream>
+#include <sstream>
+
+#include "FM24Vxx_I2C.h"
+
+namespace _FM24VXX_I2C {
+
+    unsigned char CFM24VXX_I2C::I2CModuleRefCounter = 0;
+
+    CFM24VXX_I2C::CFM24VXX_I2C(const PinName p_sda, const PinName p_scl, const unsigned char p_address, const PinName p_wp, const unsigned int p_frequency) : _internalId("") {
+        DEBUG_ENTER("CFM24VXX_I2C")
+
+        if (CFM24VXX_I2C::I2CModuleRefCounter != 0) {
+            error("CFM24VXX_I2C: Wrong params");
+        }
+#ifdef __DEBUG
+        std::ostringstream out(std::ostringstream::out);
+        out << "CFM24VXX_I2C #" << CFM24VXX_I2C::I2CModuleRefCounter;
+        _internalId.assign(out.str());
+        DEBUG("CFM24VXX_I2C: _internalId='%s'", _internalId.c_str())
+#endif // __DEBUG
+        _i2cInstance = new I2C(p_sda, p_scl);
+        CFM24VXX_I2C::I2CModuleRefCounter += 1;
+        DEBUG_ENTER("CFM24VXX_I2C: refCounter=%d", CFM24VXX_I2C::I2CModuleRefCounter)
+        // Memory page select is set to 0
+        _slaveAddress = (p_address << 2) | 0xa0; // Slave address format is: 1 0 1 0 A2 A1 PS R/W, PS set to 0
+        DEBUG("CFM24VXX_I2C: I2C slave adress:  0x%02x", _slaveAddress)
+        _i2cInstance->frequency(p_frequency); // Set the frequency of the I2C interface
+
+        if (p_wp != NC) {
+            DEBUG("CFM24VXX_I2C: WP managed");
+            _wp = new DigitalOut(p_wp);
+            _wp->write(0); // Disable write protect
+        } else {
+            DEBUG("CFM24VXX_I2C: WP not managed");
+            _wp = NULL; // Not used
+        }
+ 
+        // Retrieve device identifiers
+        _deviceID = NULL;
+        GetDevideIDs();
+    
+        DEBUG_LEAVE("CFM24VXX_I2C")
+    }
+
+    CFM24VXX_I2C::~CFM24VXX_I2C() {
+        DEBUG_ENTER("~CFM24VXX_I2C")
+    
+        // Release I2C instance
+        DEBUG_ENTER("~CFM24VXX_I2C: refCounter=%d", CFM24VXX_I2C::I2CModuleRefCounter)
+        CFM24VXX_I2C::I2CModuleRefCounter -= 1;
+        if (CFM24VXX_I2C::I2CModuleRefCounter == 0) {
+            delete _i2cInstance;
+            _i2cInstance = NULL;
+            if (_deviceID != NULL) {
+                delete _deviceID;
+                _deviceID = NULL;
+            }
+        }
+        // Release _wp if required
+        if (_wp != NULL) {
+            _wp->write(0);
+            delete _wp;
+        }
+    
+        DEBUG_LEAVE("~CFM24VXX_I2C")
+    }
+    
+    bool CFM24VXX_I2C::WriteProtect(const bool p_writeProtect) {
+        if (_wp != NULL) {
+            DEBUG("WP set to: %x", (int)p_writeProtect)
+            _wp->write((int)(p_writeProtect));
+            return true;
+        }
+    
+        return false;
+    }
+
+    void CFM24VXX_I2C::GetDevideIDs() {
+        _deviceID = new CFM24VXX_IDs(0x00, 0x00, 0x00);
+    }
+
+    bool CFM24VXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern) {
+        DEBUG_ENTER("CFM24VXX_I2C::EraseMemoryArea: 0x%02x - %d - 0x%02x", p_startAddress, p_count, p_pattern)
+    
+        std::vector<unsigned char> eraseBuffer(p_count, p_pattern);
+        return Write(p_startAddress, eraseBuffer, false);
+    }
+
+    bool CFM24VXX_I2C::Write(const short p_address, const unsigned char p_byte) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (byte): Memory address: 0x%02x - 0x%02x", p_address, p_byte)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[3]; // Memory address + one byte of data
+        // 1.1. Memory address
+        short address = p_address + 1; // Index start to 1
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Write (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Write (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+        // 1.2. Datas
+        i2cBuffer[2] = p_byte;
+        DEBUG("CFM24VXX_I2C::Write (byte): value=0x%02x", i2cBuffer[2])
+    
+        // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+        int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 3);
+        wait(0.02);
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Write (byte) %x", (bool)(result == 0))
+        return (bool)(result == 0);
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const short p_short, const CFM24VXX_I2C::Mode p_mode) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[4]; // Memory address + one short (2 bytes)
+        // 1.1. Memory address
+        short address = p_address + 1; // Index start to 1
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Write (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Write (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+        // 1.2. Datas
+        if (p_mode == BigEndian) {
+            i2cBuffer[2] = (unsigned char)(p_short >> 8);
+            i2cBuffer[3] = (unsigned char)((unsigned char)p_short & 0xff);
+        } else {
+            i2cBuffer[2] = (unsigned char)((unsigned char)p_short & 0xff);
+            i2cBuffer[3] = (unsigned char)(p_short >> 8);
+        }
+        DEBUG("CFM24VXX_I2C::Write (short): value=0x%02x%02x", i2cBuffer[2], i2cBuffer[3])
+    
+        // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+        int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 4);
+        wait(0.02);
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Write (short) %x", (bool)(result == 0))
+        return (bool)(result == 0);
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const int p_int, const CFM24VXX_I2C::Mode p_mode) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[6]; // Memory address + one integer (4 bytes)
+        // 1.1. Memory address
+        short address = p_address + 1; // Index start to 1
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Write (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Write (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+        // 1.2. Datas
+        if (p_mode == BigEndian) {
+            i2cBuffer[2] = (unsigned char)(p_int >> 24);
+            i2cBuffer[3] = (unsigned char)(p_int >> 16);
+            i2cBuffer[4] = (unsigned char)(p_int >> 8);
+            i2cBuffer[5] = (unsigned char)((unsigned char)p_int & 0xff);
+        } else {
+            i2cBuffer[2] = (unsigned char)((unsigned char)p_int & 0xff);
+            i2cBuffer[3] = (unsigned char)(p_int >> 8);
+            i2cBuffer[4] = (unsigned char)(p_int >> 16);
+            i2cBuffer[5] = (unsigned char)(p_int >> 24);
+        }
+        DEBUG("CFM24VXX_I2C::Write (int): value=0x%02x%02x%02x%02x", i2cBuffer[2], i2cBuffer[3], i2cBuffer[4], i2cBuffer[5])
+    
+        // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+        int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 6);
+        wait(0.02);
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Write (int) %x", (bool)(result == 0))
+        return (bool)(result == 0);
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (std::string)")
+        return Write(p_address, p_string.c_str(), p_storeLength, p_length2write);
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (std::vector)")
+    
+        int length = (p_length2write == -1) ? p_datas.size() : p_length2write;
+        unsigned char array[length];
+        std::copy(p_datas.begin(), p_datas.end(), array);
+        bool result = Write(p_address, array, p_storeLength, length);
+        wait(0.02);
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Write (std::vector): %d", result)
+        return result;
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (char *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
+    
+        // 1.Prepare buffer
+        int length = (p_length2write == -1) ? strlen(p_datas) : p_length2write;
+        if (p_storeLength) {
+            length += 4; // Add four bytes for the length as integer
+        }
+        DEBUG("CFM24VXX_I2C::Write (char *): length:%d", length)
+        
+        char i2cBuffer[2 + length];
+        // 1.1. Memory address
+        short address = p_address + 1;
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Write (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Write (char *): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+        // 1.2. Datas
+        if (p_storeLength) {
+            // Fill the length
+            i2cBuffer[2] = (unsigned char)(length >> 24);
+            i2cBuffer[3] = (unsigned char)(length >> 16);
+            i2cBuffer[4] = (unsigned char)(length >> 8);
+            i2cBuffer[5] = (unsigned char)((unsigned char)length & 0xff);
+            for (int i = 0; i < length - 4; i++) {
+                i2cBuffer[6 + i] = *(p_datas + i);
+            }
+        } else { // The length was not stored
+            for (int i = 0; i < length; i++) {
+                i2cBuffer[2 + i] = *(p_datas + i);
+            }
+        }
+        
+        // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+        int result = _i2cInstance->write(_slaveAddress, i2cBuffer, 2 + length);
+        wait(0.02);
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Write (char *) %x", (bool)(result == 0))
+        return (bool)(result == 0);
+    }
+    
+    bool CFM24VXX_I2C::Write(const short p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Write (byte *): Memory address: 0x%02x - %x - %d", p_address, p_storeLength, p_length2write)
+        return Write(p_address, (const char *)p_datas, p_storeLength, p_length2write);
+    }
+    
+    bool CFM24VXX_I2C::Read(const short p_address, unsigned char * p_byte) {
+        DEBUG_ENTER("CFM24VXX_I2C::Read (byte): Memory address:0x%02x", p_address)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[2];
+        // 1.1. Memory address
+        i2cBuffer[0] = (unsigned char)(p_address >> 8);
+        DEBUG("CFM24VXX_I2C::Read (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+        DEBUG("CFM24VXX_I2C::Read (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+    
+        // 2. Send I2C start + memory address
+        if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (byte): Write memory done")
+            // 2. Read data + I2C stop
+            int result = _i2cInstance->read(_slaveAddress, (char *)p_byte, 1);
+            wait(0.02);
+    
+            DEBUG_LEAVE("CFM24VXX_I2C::Read (byte): %x", (bool)(result == 0))
+            return (bool)(result == 0);
+        }
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (byte) (false)")
+        return false;
+    }
+    
+    bool CFM24VXX_I2C::Read(const short p_address, short *p_short, const CFM24VXX_I2C::Mode p_mode) {
+        DEBUG_ENTER("CFM24VXX_I2C::Read (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[2];
+        // 1.1. Memory address
+        i2cBuffer[0] = (unsigned char)(p_address >> 8);
+        DEBUG("CFM24VXX_I2C::Read (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+        DEBUG("CFM24VXX_I2C::Read (short): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+    
+        // 2. Send I2C start + memory address
+        if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (short): Write memory done")
+            // 2. Read data + I2C stop
+            int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
+            if (result == 0) {
+DEBUG("CFM24VXX_I2C::Read (short): value: 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1])
+                if (p_mode ==  BigEndian) {
+                    *p_short = (short)(i2cBuffer[0] << 8 | i2cBuffer[1]);
+                } else {
+                    *p_short = (short)(i2cBuffer[1] << 8 | i2cBuffer[0]);
+                }
+        
+                DEBUG_LEAVE("CFM24VXX_I2C::Read (short): 0x%04x", *p_short)
+                return true;
+            }
+        }
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (short) (false)")
+        return false;
+    }
+    
+    bool CFM24VXX_I2C::Read(const short p_address, int *p_int, const CFM24VXX_I2C::Mode p_mode) {
+        DEBUG_ENTER("CFM24VXX_I2C::Read (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+    
+        // 1.Prepare buffer
+        char i2cBuffer[4];
+        // 1.1. Memory address
+        i2cBuffer[0] = (unsigned char)(p_address >> 8);
+        DEBUG("CFM24VXX_I2C::Read (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+        DEBUG("CFM24VXX_I2C::Read (int): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+    
+        // 2. Send I2C start + memory address
+        if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (int): Write memory done")
+            // 2. Read data + I2C stop
+            int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
+            if (result == 0) {
+DEBUG("CFM24VXX_I2C::Read (int): value: 0x%02x - 0x%02x - 0x%02x - 0x%02x", i2cBuffer[0], i2cBuffer[1], i2cBuffer[2], i2cBuffer[3])
+                wait(0.02);
+                if (p_mode ==  BigEndian) {
+                    *p_int = (int)(i2cBuffer[0] << 24 | i2cBuffer[1] << 16 | i2cBuffer[2] << 8 | i2cBuffer[3]);
+                } else {
+                    *p_int = (int)(i2cBuffer[3] << 24 | i2cBuffer[2] << 16 | i2cBuffer[1] << 8 | i2cBuffer[0]);
+                }
+    
+                DEBUG_LEAVE("CFM24VXX_I2C::Read (int): %d", *p_int)
+                return true;
+            }
+    
+            DEBUG_LEAVE("CFM24VXX_I2C::Read (int):false")
+            return false;
+        }
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (int) (false)")
+        return false;
+    }
+    
+    bool CFM24VXX_I2C::Read(const short p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Read (vector): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+    
+        // 1.Prepare buffer
+        short address = p_address;
+        int length = 0;
+        if (p_readLengthFirst) {
+            if (!Read(address, &length)) { // Read the length in big endian mode
+                DEBUG_LEAVE("CFM24VXX_I2C::Read (vector) Failed to read length")
+                return false;
+            }
+            DEBUG("CFM24VXX_I2C::Read (vector): length= %d", length)
+            if (length == 0) {
+                return true;
+            }
+            address += 4; // Skip the length value 
+            length -= 4; // length is the size of (string length + string)
+        } else {
+            if (p_length2write == -1) {
+                length = p_datas.size();
+            } else {
+                length = p_length2write;
+            }
+        }
+        DEBUG("CFM24VXX_I2C::Read (vector): length= %d", length)
+    
+        // 2. Memory address
+        char i2cBuffer[2];
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Read (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Read (vector): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+    
+        // 3. Send I2C start + memory address
+        if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (vector): Write memory done")
+            // 4. read data + I2C stop
+            unsigned char buffer[length];
+            int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
+            wait(0.02);
+            if (result == 0) {
+                p_datas.assign(buffer, buffer + length);
+    
+                DEBUG_LEAVE("CFM24VXX_I2C::Read (vector): %x", (bool)(result == 0))
+                return (bool)(result == 0);
+            }
+        }
+    
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (vector) (false)")
+        return false;
+    }
+    
+    bool CFM24VXX_I2C::Read(const short p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write) {
+        DEBUG_ENTER("CFM24VXX_I2C::Read (string): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+
+/*        std::vector<unsigned char> datas;
+        if (Read(p_address, datas, p_readLengthFirst, p_length2write) == true) {
+            p_string.assign((char *)datas.begin(), datas.size());
+            
+            return true;
+        }
+        
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (string) (false)")
+        return false;
+*/        
+    
+        // 1.Prepare buffer
+        short address = p_address;
+        int length = -1;
+        if (p_readLengthFirst) { // The string was stored with its length
+            if (!Read(address, &length)) { // Read the length as integer in big endian mode
+                DEBUG_ERROR("CFM24VXX_I2C::Read (string): Failed to read length")
+                return false;
+            }
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (string): length=%d", length)
+            if (length == 0) {
+                DEBUG_ERROR("CFM24VXX_I2C::Read (string): empty")
+                return true;
+            }
+            address += 4; // Skip the length value size 
+            length -= 4; // length is the size of (string length + string)
+        } else { // The string length is provided by p_length2write parameter
+            if (p_length2write == -1) {
+                length = p_string.size();
+            } else {
+                length = p_length2write;
+                p_string.resize(p_length2write);
+            }
+        }
+        DEBUG("CFM24VXX_I2C::Read (string): Address=0x%02x - Length=%d", address, length)
+    
+        // 2. Memory address
+        char i2cBuffer[2];
+        i2cBuffer[0] = (unsigned char)(address >> 8);
+        DEBUG("CFM24VXX_I2C::Read (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+        i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+        DEBUG("CFM24VXX_I2C::Read (string): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+    
+        // 3. Send I2C start + memory address with repeat start
+        if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+            wait(0.02);
+            DEBUG("CFM24VXX_I2C::Read (string): Write memory done")
+            // 4. Read data + I2C stop
+            char buffer[length];
+            int result = _i2cInstance->read(_slaveAddress, (char *)buffer, length);
+            if (result == 0) {
+                p_string.assign(buffer, length);
+        
+                return true;
+            }
+        }
+        
+        DEBUG_LEAVE("CFM24VXX_I2C::Read (string) (false)")
+        return false;
+    }
+
+#if defined(__DEBUG)
+    void CFM24VXX_I2C::DumpMemoryArea(const int p_address, const int p_count) {
+        DEBUG_ENTER("CFM24VXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)
+    
+        DEBUG("CFM24VXX_I2C::DumpMemoryArea: Reading datas...");
+        std::vector<unsigned char> datas(p_count);
+        if (!Read(p_address, datas, false)) { // Read bytes, including the lenght indication, buffer size is not set before the call
+            std::cout << "CFM24VXX_I2C::DumpMemoryArea: read failed\r" << std::endl;
+        } else {
+            std::cout << "CFM24VXX_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
+            HEXADUMP(&datas[0], p_count);
+            std::cout << "\r" << std::endl;
+        }
+    }
+#endif // _DEBUG
+
+} // End of namespace _FM24VXX_I2C

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM24Vxx_I2C.h	Sat Mar 23 15:54:01 2013 +0000
@@ -0,0 +1,353 @@
+/* mbed simplified access to RAMTRON FV24xx Serial 3V F-RAM Memory (I2C)
+ * Copyright (c) 2013 ygarcia, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#if !defined(__FM24VXX_I2C_H__)
+#define __FM24VXX_I2C_H__
+
+#include <string>
+#include <vector>
+
+#include "FM24Vxx_IDs.h"
+#include "Debug.h" // Include mbed header + debug primitives. See DebugLibrary
+
+namespace _FM24VXX_I2C {
+    /** This class provides simplified I2C access to a RAMTRON FV24xx Serial 3V F-RAM Memory device. V0.0.0.1
+     *
+     * Note that RAMTRON FV24xx Serial 3V F-RAM Memory device could be powered at 3.3V or less only.
+     * Note that this header file include following headers:
+     * - <string>
+     * - <vector>
+     * - <mbed.h>
+     *
+     * @author Yann Garcia (Don't hesitate to contact me: garcia.yann@gmail.com)
+     */
+    class CFM24VXX_I2C { 
+        /** Reference counter used to guarentee unicity of the instance of I2C class
+         */
+        static unsigned char I2CModuleRefCounter;
+        
+        /** Device address input: A1, A2 (Pins <2,3>). See FM24V10_ds.pdf - Clause Pin Configuration
+         */
+        unsigned char _slaveAddress;
+        /** WP state indicator (pin 7); true is write protected, false otherwise
+         */
+        DigitalOut *_wp;
+        /** An unique instance of I2C class
+         */
+        I2C *_i2cInstance;
+        /** Device ID. Used for Sleep mode
+         */
+        CFM24VXX_IDs *_deviceID;
+    public:
+        /** Memory storage mode
+         */
+        enum Mode {
+            LittleEndian, //<! Little Endian mode: 0xA0B70708 is stored as 08: MSB and A0 LSB
+            BigEndian //<! Little Endian mode: 0xA0B70708 is stored as AO: MSB and 08 LSB
+        };
+    public:
+        /** Constructor with Write Protect command pin wired. Use it to manage the first I2C module
+         *
+         * @param p_sda: MBed pin for SDA
+         * @param p_scl: MBed pin for SCL
+         * @param p_address: Device address input: A1, A2 (Pins <2,3>)
+         * @param p_wp: MBed pin to manage Write Protect input. If NC, WP is not managed, default value is NC, not connected
+         * @param p_frequency: Frequency of the I2C interface (SCL), default value is 400KHz
+         * Example:
+         * - If A1 pin is tired to Vdd and A2 is tired to Vss, address shall '00000001'B
+         */
+        CFM24VXX_I2C(const PinName p_sda, const PinName p_scl, const unsigned char p_address, const PinName p_wp = NC, const unsigned int p_frequency = 400000);
+    
+        /** Destructor
+         */
+        virtual ~CFM24VXX_I2C();
+
+        /** Used to return the unique instance of I2C instance
+         */
+        inline const I2C * operator * () { return (const I2C *)_i2cInstance; };
+
+        /** Used to return the unique device identifier
+         */
+        inline const CFM24VXX_IDs * GetDevideID() { return (const CFM24VXX_IDs *)_deviceID; };
+
+        /**
+         * Used to swith high speed mode
+         * @param highSpeedMode Set to true to switch to high speed mode
+         * @remark See FM24V10_ds.pdf Page 4/16 Clause High Speed Mode (HS-mode)
+         */
+        inline void SwitchSpeedMode(const bool highSpeedMode) { /* FIXME To be done */ };
+
+        /**
+         * Used to enter in sleep mode
+         * @remark See FM24V10_ds.pdf Page 8/16 Clause Sleep Mode
+         */
+        inline void EnterSleepMode() { /* FIXME To be done */ };
+
+        /**
+         * Used to enter in sleep mode
+         * @remark See FM24V10_ds.pdf Page 8/16 Clause Sleep Mode
+         */
+        inline void LeaveSpeedMode() { /* FIXME To be done */ };
+        
+        /**
+         * Used to select memory page
+         * @param memoryPage The selected memory page (0 or 1)
+         * @remark See FM24V10_ds.pdf Page 3/16 Clause Memory Architecture
+        */
+        inline void SelectMemoryPage(const unsigned char memoryPage) { _slaveAddress |= ((memoryPage & 0x01) << 1) | 0xa0; };
+
+        /** Erase of memory area starting at the specified address, using the specified pattern to fill the memory area
+         *
+         * @param p_startAddress The address of the memory area (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_count The size of the memory area to erase
+         * @param p_pattern The pattern value to use to fill the memory area. Default vqlue: 0x00
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * ...
+         * myEEPROM.EraseMemoryArea(0, 1024); // Set to 0x00 the first 1Kb memory 
+         * ...
+         * @endcode
+         */
+        bool EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern = 0x00);
+    
+        /** Write a byte at the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_byte The byte value to save
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * unsigned char value = 0xaa;
+         * ...
+         * myEEPROM.Write(memoryAddress, value);
+         * ...
+         * @endcode
+         */
+        bool Write(const short p_address, const unsigned char p_byte);
+    
+        /** Write a short at the specified memory address according to the specified mode
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_short The short value to save
+         * @param p_mode The storage mode. Default value: BigEndian
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * short value = 0xcafe;
+         * ...
+         * myEEPROM.Write(memoryAddress, value, LittleEndian);
+         * ...
+         * @endcode
+         */
+        bool Write(const short p_address, const short p_short, const CFM24VXX_I2C::Mode p_mode = BigEndian);
+    
+        /** Write an integer at the specified memory address according to the specified mode
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_int The integer value to save
+         * @param p_mode The storage mode. Default value: BigEndian
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * int value = 0xcafedeca;
+         * ...
+         * myEEPROM.Write(memoryAddress, value, LittleEndian);
+         * ...
+         * @endcode
+         */
+        bool Write(const short p_address, const int p_int, const CFM24VXX_I2C::Mode p_mode = BigEndian);
+    
+        /** Write a buffer of bytes at the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_datas The string to save
+         * @param p_storeLength If true, store also the length of the buffer in Big Endian mode, otherwise the length will be provided by p_length2write parameter. Default value: true.
+         * @param p_length2write The number of bytes to write, -1 for all characters. Default value: -1
+         * @return true on success, false otherwise
+         */
+        bool Write(const short p_address, const std::vector<unsigned char> & p_datas, bool p_storeLength = true, const int p_length2write = -1);
+    
+        /** Write a buffer of bytes at the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_datas The buffer of bytes to save
+         * @param p_storeLength If true, store also the length of the buffer in Big Endian mode, otherwise the length will be provided by p_length2write parameter. Default value: true.
+         * @param p_length2write The number of bytes to write, -1 for all bytes. Default value: -1
+         * @return true on success, false otherwise
+         */
+        bool Write(const short p_address, const unsigned char *p_datas, bool p_storeLength = true, const int p_length2write = -1);
+    
+        /** Write a string at the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_string The string to save
+         * @param p_storeLength If true, store also the length of the string in Big Endian mode, otherwise the length will be provided by p_length2write parameter. Default value: true.
+         * @param p_length2write The number of character to write, -1 for all characters
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * std::string text2save("CafeDeca");
+         * ...
+         * myEEPROM.Write(memoryAddress, text2save);
+         * ...
+         * @endcode
+         */
+        bool Write(const short p_address, const std::string & p_string, const bool p_storeLength = true, const int p_length2write = -1);
+    
+        /** Write a buffer of characters at the specified memory address (from 0 to N - 1, N is the number of cells of the memory)
+         *
+         * Note that the length of the buffer is not saved and the string is saved in Big Endian mode
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_datas The string to save
+         * @param p_storeLength If true, store also the length of the string in Big Endian mode, otherwise the length will be provided by p_length2write parameter. Default value: true.
+         * @param length2write The number of character to write, -1 for all characters
+         * @return true on success, false otherwise
+         */
+        bool Write(const short p_address, const char *p_datas, const bool p_storeLength = true, const int p_length2write = -1);
+    
+        /** Read a byte from the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_byte The byte value to read
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * unsigned char value;
+         * ...
+         * myEEPROM.Read(memoryAddress, (unsigned char *)&value);
+         * ...
+         * @endcode
+         */
+        bool Read(const short p_address, unsigned char *p_value);
+    
+        /** Read a short from the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_short The short value to read
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * short value;
+         * ...
+         * myEEPROM.Read(memoryAddress, (short *)&value);
+         * ...
+         * @endcode
+         */
+        bool Read(const short p_address, short *p_short, CFM24VXX_I2C::Mode p_mode = BigEndian);
+    
+        /** Read an integer from the specified memory address
+         *
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_int The integer value to read
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * int value;
+         * ...
+         * myEEPROM.Read(memoryAddress, (int *)&value);
+         * ...
+         * @endcode
+         */
+        bool Read(const short p_address, int *p_int, CFM24VXX_I2C::Mode p_mode = BigEndian);
+    
+        /** Read a buffer of bytes from the specified memory address and store it into a std::vector<unsigned char> object
+         *
+         * Note that the size of the buffer object is used for the number of bytes to read
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_datas The buffer to fill
+         * @param p_readLengthFirst If true, read the length first and p_length2write parameter is ignored, otherwise the length is provided by p_length2write parameter. Default value: true
+         * @param p_length2read The number of character to write, -1 to use the size of the string buffer
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * std::vector<unsigned char> datas(bufferLength);
+         * ...
+         * myEEPROM.Read(memoryAddress, datas);
+         * ...
+         * @endcode
+         */
+        bool Read(const short p_address, std::vector<unsigned char> & p_datas, bool p_readLengthFirst = true, int p_length2read = -1);
+    
+        /** Read a buffer of characters from the specified memory address and store it into a string object
+         *
+         * Note that the size of the string object is used for the number of characters to read
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_string The string buffer to fill
+         * @param p_readLengthFirst If true, read the length first and p_length2write parameter is ignored, otherwise the length is provided by p_length2write parameter. Default value: true
+         * @param p_length2write The number of character to write, -1 to use the size of the string buffer
+         * @return true on success, false otherwise
+         * Exemple:
+         * @code
+         * std::string readtext;
+         * ...
+         * myEEPROM.Read(memoryAddress, readtext);
+         * ...
+         * @endcode
+         */
+        bool Read(const short p_address, std::string & p_string, bool p_readLengthFirst = true, int p_length2write = -1);
+    
+        /** Activate or deactivate write protect (pin 7)
+         *
+         * @param p_writeProtect: Set to true to activate write protection, false otherwise
+         * @return true on success, false otherwise
+         */
+        bool WriteProtect(const bool p_writeProtect);
+    
+        /** Indicate the current WP state indicator  (pin 7)
+         * @return true is write protected, false otherwise
+         */
+        inline bool IsWriteProtected() {
+            return (_wp != NULL) ? (bool)(_wp->read() == 1) : false;
+        }
+
+#if defined(__DEBUG)
+        /** Dump a memory area
+         * 
+         * Note that this method is available only on debug mode
+         * @param p_address The memory address (from 0 to N - 1, N is the number of cells of the memory)
+         * @param p_count The number of bytes toi dump
+         * @return true on success, false otherwise
+         */
+        void DumpMemoryArea(const int p_address, const int p_count);
+        /** For debug purpose only
+         */
+        inline std::string & ToString() { return _internalId; };
+#else // __DEBUG
+        inline void DumpMemoryArea(const int p_address, const int p_count) {};
+#endif // _DEBUG
+        
+    private:
+        /** Internal reference identifier
+         */
+        std::string _internalId;
+
+    private:
+        /**
+         * Retrieve device identifiers
+         * @remark See FM24V10_ds.pdf Page 9/16 Clause Device ID
+         */
+        void GetDevideIDs();
+    
+    }; // End of class CFM24VXX_I2C
+
+}; // End of namespace _FM24VXX_I2C
+
+using namespace _FM24VXX_I2C;
+
+#endif // __FM24VXX_I2C_H__

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM24Vxx_IDs.h	Sat Mar 23 15:54:01 2013 +0000
@@ -0,0 +1,67 @@
+/* mbed simplified access to RAMTRON FV24xx Serial 3V F-RAM Memory (I2C)
+ * Copyright (c) 2013 ygarcia, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#if !defined(__FM24VXX_IDS_H__)
+#define __FM24VXX_IDS_H__
+
+#include <mbed.h>
+
+namespace _FM24VXX_I2C {
+
+/**
+ * Device ID description
+ * @remark See Figure 14. Manufacturer and Product ID
+ */
+class CFM24VXX_IDs {
+
+    /** Device ID description
+     */
+    struct {
+        unsigned char manufacturerID;
+        union {
+            unsigned char id;
+            struct {
+                unsigned char variation:4;
+                unsigned char density:4;
+            } vd;
+        } productID;
+        unsigned char dieRevision;
+    } _deviceID;
+    
+    public:
+        inline CFM24VXX_IDs(const unsigned char manufacturerID, const unsigned char productID, const unsigned char dieRevision) {
+            _deviceID.manufacturerID = manufacturerID;
+            _deviceID.productID.id = productID;
+            _deviceID.dieRevision = dieRevision;
+        } // End of Constructor
+        
+        inline unsigned char GetManufacturerID() const { return _deviceID.manufacturerID; };
+        
+        inline unsigned char GetProductID() const { return _deviceID.productID.id; };
+        
+        inline unsigned char GetRevisionID() const { return _deviceID.dieRevision; };
+        
+        inline unsigned char GetDensity() const { return _deviceID.productID.vd.density >> 4; };
+        
+        inline unsigned char GetVariation() const { return _deviceID.productID.vd.variation; };
+        
+}; // End of class CFM24VXX_IDs
+
+} // End of namespace _FM24VXX_I2C
+
+#endif // __FM24VXX_IDS_H__