Karl Zweimüller
Fork of 24LCxx_I2C. Works for Renesas EEPROMs. Fixes problems with PageWrites over page boundaries.
Fork of
24LCxx_I2C
by 
Yann Garcia
Revision 4:2add27250e69, committed 2014-12-23
- Comitter:
- charly
- Date:
- Tue Dec 23 17:21:25 2014 +0000
- Parent:
- 3:fc3eb4d2b07e
- Commit message:
- take care of page boundaries when writing to EEPROM
Changed in this revision
| 24LCxx_I2C.cpp | Show annotated file Show diff for this revision Revisions of this file |
| 24LCxx_I2C.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/24LCxx_I2C.cpp Wed May 21 19:58:39 2014 +0000
+++ b/24LCxx_I2C.cpp Tue Dec 23 17:21:25 2014 +0000
@@ -1,19 +1,19 @@
/* mbed simplified access to Microchip 24LCxx Serial EEPROM devices (I2C)
* Copyright (c) 2010-2012 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
+ * 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
+ * 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,
+ * 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>
@@ -21,461 +21,590 @@
#include "24LCxx_I2C.h"
-namespace _24LCXX_I2C {
+namespace _24LCXX_I2C
+{
- unsigned char C24LCXX_I2C::I2CModuleRefCounter = 0;
-
- 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("") {
- DEBUG_ENTER("C24LCXX_I2C")
+unsigned char C24LCXX_I2C::I2CModuleRefCounter = 0;
- if (C24LCXX_I2C::I2CModuleRefCounter != 0) {
- error("C24LCXX_I2C: Wrong params");
- }
+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,
+ const uint32_t deviceSize, const uint8_t pageSize) : _internalId("")
+{
+ DEBUG_ENTER("C24LCXX_I2C")
+
+ if (C24LCXX_I2C::I2CModuleRefCounter != 0) {
+ error("C24LCXX_I2C: Wrong params");
+ }
#ifdef __DEBUG
- std::ostringstream out(std::ostringstream::out);
- out << "C24LCXX_I2C #" << C24LCXX_I2C::I2CModuleRefCounter;
- _internalId.assign(out.str());
- DEBUG("C24LCXX_I2C: _internalId='%s'", _internalId.c_str())
+ std::ostringstream out(std::ostringstream::out);
+ out << "C24LCXX_I2C #" << C24LCXX_I2C::I2CModuleRefCounter;
+ _internalId.assign(out.str());
+ DEBUG("C24LCXX_I2C: _internalId='%s'", _internalId.c_str())
#endif // __DEBUG
- _i2cInstance = new I2C(p_sda, p_scl); //, "24LCxx_I2C");
- C24LCXX_I2C::I2CModuleRefCounter += 1;
- DEBUG_ENTER("C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
+ _i2cInstance = new I2C(p_sda, p_scl); //, "24LCxx_I2C");
+ C24LCXX_I2C::I2CModuleRefCounter += 1;
+ DEBUG_ENTER("C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
+
+ _slaveAddress = (p_address << 1) | 0xa0; // Slave address format is: 1 0 1 0 A3 A2 A1 R/W
+ DEBUG("C24LCXX_I2C: I2C slave adress: 0x%02x", _slaveAddress)
+ _i2cInstance->frequency(p_frequency); // Set the frequency of the I2C interface
+ if (p_wp != NC) {
+ DEBUG("C24LCXX_I2C: WP managed");
+ _wp = new DigitalOut(p_wp);
+ _wp->write(0); // Disable write protect
+ } else {
+ DEBUG("C24LCXX_I2C: WP not managed");
+ _wp = NULL; // Not used
+ }
+
+ DEBUG("C24LCXX_I2C: Device-Size %i kbit", deviceSize);
+
+ DEBUG("C24LCXX_I2C: Page-Size %i Bytes", pageSize);
+
+ _pageSize = pageSize; //TODO Check for valid values
+ _deviceSize = deviceSize; //TODO Check for valid values
+
+ DEBUG_LEAVE("C24LCXX_I2C")
+}
- _slaveAddress = (p_address << 1) | 0xa0; // Slave address format is: 1 0 1 0 A3 A2 A1 R/W
- DEBUG("C24LCXX_I2C: I2C slave adress: 0x%02x", _slaveAddress)
- _i2cInstance->frequency(p_frequency); // Set the frequency of the I2C interface
- if (p_wp != NC) {
- DEBUG("C24LCXX_I2C: WP managed");
- _wp = new DigitalOut(p_wp);
- _wp->write(0); // Disable write protect
- } else {
- DEBUG("C24LCXX_I2C: WP not managed");
- _wp = NULL; // Not used
- }
-
- DEBUG_LEAVE("C24LCXX_I2C")
+C24LCXX_I2C::~C24LCXX_I2C()
+{
+ DEBUG_ENTER("~C24LCXX_I2C")
+
+ // Release I2C instance
+ DEBUG_ENTER("~C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
+ C24LCXX_I2C::I2CModuleRefCounter -= 1;
+ if (C24LCXX_I2C::I2CModuleRefCounter == 0) {
+ delete _i2cInstance;
+ _i2cInstance = NULL;
+ }
+ // Release _wp if required
+ if (_wp != NULL) {
+ _wp->write(0);
+ delete _wp;
+ }
+
+ DEBUG_LEAVE("~C24LCXX_I2C")
+}
+
+bool C24LCXX_I2C::WriteProtect(const bool p_writeProtect)
+{
+ if (_wp != NULL) {
+ DEBUG("WP set to: %x", (int)p_writeProtect)
+ _wp->write((int)(p_writeProtect));
+ return true;
}
- C24LCXX_I2C::~C24LCXX_I2C() {
- DEBUG_ENTER("~C24LCXX_I2C")
-
- // Release I2C instance
- DEBUG_ENTER("~C24LCXX_I2C: refCounter=%d", C24LCXX_I2C::I2CModuleRefCounter)
- C24LCXX_I2C::I2CModuleRefCounter -= 1;
- if (C24LCXX_I2C::I2CModuleRefCounter == 0) {
- delete _i2cInstance;
- _i2cInstance = NULL;
+ return false;
+}
+
+bool C24LCXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern)
+{
+ DEBUG_ENTER("C24LCXX_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 C24LCXX_I2C::Write(const short p_address, const unsigned char p_byte)
+{
+ DEBUG_ENTER("C24LCXX_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
+ short address = p_address; // no Index + 1
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+ // 1.2. Datas
+ i2cBuffer[2] = p_byte;
+ DEBUG("C24LCXX_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("C24LCXX_I2C::Write (byte) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const short p_short, const C24LCXX_I2C::Mode p_mode)
+{
+ DEBUG_ENTER("C24LCXX_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
+ short address = p_address; // no Index+1
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Write (short) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const int p_int, const C24LCXX_I2C::Mode p_mode)
+{
+ DEBUG_ENTER("C24LCXX_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
+ short address = p_address; // no Index+1
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Write (int) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_I2C::Write (std::string)")
+ return Write(p_address, p_string.c_str(), p_storeLength, p_length2write);
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Write (std::vector): %d", result)
+ return result;
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const char * p_datas, const bool p_storeLength, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Write (char *): length:%d", length)
+
+ char i2cBuffer[2 + length];
+ // 1.1. Memory address
+ //short address = p_address + 1; // Index start to 1
+ short address = p_address; // no Index+1
+// i2cBuffer[0] = (unsigned char)(address >> 8);
+// DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+// i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+// DEBUG("C24LCXX_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);
}
- // Release _wp if required
- if (_wp != NULL) {
- _wp->write(0);
- delete _wp;
+ } else { // The length was not stored
+ for (int i = 0; i < length; i++) {
+ i2cBuffer[2 + i] = *(p_datas + i);
}
-
- DEBUG_LEAVE("~C24LCXX_I2C")
+ }
+
+ //HEXADUMP((unsigned char *) i2cBuffer+2, length);
+
+/*
+ // 2. Send I2C start + Memory Address
+ _i2cInstance->write(_slaveAddress, i2cBuffer, 2, true);
+ wait(0.02);
+
+ // 3. Send Datas + I2C stop
+ int result = _i2cInstance->write(_slaveAddress, i2cBuffer+2, length);
+ wait(0.02);
+*/
+ //write pages to EEPROM
+ int result = i2cWrite(address,i2cBuffer+2, length);
+ wait(0.02);
+
+ DEBUG_LEAVE("C24LCXX_I2C::Write (char *) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+}
+
+bool C24LCXX_I2C::Write(const short p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_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);
+}
+
+
+int C24LCXX_I2C::i2cWrite(short address, const char *data, int length)
+{
+ //write to EEPROM in chunks of pagesize
+ int rv = 0;
+ while (length > 0) {
+ int bytesUntilPageBoundary = _pageSize - address % _pageSize;
+ int cnt = min(length, bytesUntilPageBoundary);
+ char i2cBuffer[2 + _pageSize];
+ // 1.1. Memory address
+
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::i2cWrite (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_I2C::i2cWrite (char *): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+ DEBUG("C24LCXX_I2C::i2cWrite (char *): length : %i", cnt)
+
+ //Copy data after address
+ for (int i = 0; i < cnt; i++) {
+ i2cBuffer[2 + i] = *(data + i);
+ }
+
+ //HEXADUMP((unsigned char *) i2cBuffer, cnt+2);
+ // Write data; max until page boundary
+ int rv = _i2cInstance->write(_slaveAddress, i2cBuffer, cnt+2);
+
+ if (rv != 0) return rv;
+
+ address += cnt;
+ data += cnt;
+ length -= cnt;
}
-
- bool C24LCXX_I2C::WriteProtect(const bool p_writeProtect) {
- if (_wp != NULL) {
- DEBUG("WP set to: %x", (int)p_writeProtect)
- _wp->write((int)(p_writeProtect));
+ return rv;
+}
+
+
+bool C24LCXX_I2C::Read(const short p_address, unsigned char * p_byte)
+{
+ DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+ DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Read (byte): %x", (bool)(result == 0))
+ return (bool)(result == 0);
+ }
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (byte) (false)")
+ return false;
+}
+
+bool C24LCXX_I2C::Read(const short p_address, short *p_short, const C24LCXX_I2C::Mode p_mode)
+{
+ DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+ DEBUG("C24LCXX_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("C24LCXX_I2C::Read (short): Write memory done")
+ // 2. Read data + I2C stop
+ int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
+ if (result == 0) {
+ DEBUG("C24LCXX_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("C24LCXX_I2C::Read (short): 0x%04x", *p_short)
return true;
}
-
+ }
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (short) (false)")
+ return false;
+}
+
+bool C24LCXX_I2C::Read(const short p_address, int *p_int, const C24LCXX_I2C::Mode p_mode)
+{
+ DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
+ DEBUG("C24LCXX_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("C24LCXX_I2C::Read (int): Write memory done")
+ // 2. Read data + I2C stop
+ int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
+ if (result == 0) {
+ DEBUG("C24LCXX_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("C24LCXX_I2C::Read (int): %d", *p_int)
+ return true;
+ }
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (int):false")
return false;
}
- bool C24LCXX_I2C::EraseMemoryArea(const short p_startAddress, const int p_count, const unsigned char p_pattern) {
- DEBUG_ENTER("C24LCXX_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);
- }
+ DEBUG_LEAVE("C24LCXX_I2C::Read (int) (false)")
+ return false;
+}
+
+bool C24LCXX_I2C::Read(const short p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_I2C::Read (vector): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
- bool C24LCXX_I2C::Write(const short p_address, const unsigned char p_byte) {
- DEBUG_ENTER("C24LCXX_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
- short address = p_address; // no Index + 1
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_I2C::Write (byte): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
- // 1.2. Datas
- i2cBuffer[2] = p_byte;
- DEBUG("C24LCXX_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("C24LCXX_I2C::Write (byte) %x", (bool)(result == 0))
- return (bool)(result == 0);
+ // 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("C24LCXX_I2C::Read (vector) Failed to read length")
+ return false;
+ }
+ DEBUG("C24LCXX_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;
+ }
}
-
- bool C24LCXX_I2C::Write(const short p_address, const short p_short, const C24LCXX_I2C::Mode p_mode) {
- DEBUG_ENTER("C24LCXX_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
- short address = p_address; // no Index+1
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Write (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Write (short) %x", (bool)(result == 0))
- return (bool)(result == 0);
- }
-
- bool C24LCXX_I2C::Write(const short p_address, const int p_int, const C24LCXX_I2C::Mode p_mode) {
- DEBUG_ENTER("C24LCXX_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
- short address = p_address; // no Index+1
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Write (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_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);
+ DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
+
+ // 2. Memory address
+ char i2cBuffer[2];
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_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_LEAVE("C24LCXX_I2C::Write (int) %x", (bool)(result == 0))
- return (bool)(result == 0);
- }
-
- bool C24LCXX_I2C::Write(const short p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_I2C::Write (std::string)")
- return Write(p_address, p_string.c_str(), p_storeLength, p_length2write);
- }
-
- bool C24LCXX_I2C::Write(const short p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_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);
+ DEBUG("C24LCXX_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);
-
- DEBUG_LEAVE("C24LCXX_I2C::Write (std::vector): %d", result)
- return result;
- }
-
- bool C24LCXX_I2C::Write(const short p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Write (char *): length:%d", length)
-
- char i2cBuffer[2 + length];
- // 1.1. Memory address
- //short address = p_address + 1; // Index start to 1
- short address = p_address; // no Index+1
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Write (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_I2C::Write (char *) %x", (bool)(result == 0))
- return (bool)(result == 0);
- }
-
- bool C24LCXX_I2C::Write(const short p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_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 C24LCXX_I2C::Read(const short p_address, unsigned char * p_byte) {
- DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Read (byte): %x", (bool)(result == 0))
+ if (result == 0) {
+ p_datas.assign(buffer, buffer + length);
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (vector): %x", (bool)(result == 0))
return (bool)(result == 0);
}
-
- DEBUG_LEAVE("C24LCXX_I2C::Read (byte) (false)")
- return false;
}
-
- bool C24LCXX_I2C::Read(const short p_address, short *p_short, const C24LCXX_I2C::Mode p_mode) {
- DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_I2C::Read (short): Write memory done")
- // 2. Read data + I2C stop
- int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 2);
- if (result == 0) {
-DEBUG("C24LCXX_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("C24LCXX_I2C::Read (short): 0x%04x", *p_short)
- return true;
- }
- }
-
- DEBUG_LEAVE("C24LCXX_I2C::Read (short) (false)")
- return false;
- }
-
- bool C24LCXX_I2C::Read(const short p_address, int *p_int, const C24LCXX_I2C::Mode p_mode) {
- DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)p_address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_I2C::Read (int): Write memory done")
- // 2. Read data + I2C stop
- int result = _i2cInstance->read(_slaveAddress, i2cBuffer, 4);
- if (result == 0) {
-DEBUG("C24LCXX_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("C24LCXX_I2C::Read (int): %d", *p_int)
- return true;
- }
-
- DEBUG_LEAVE("C24LCXX_I2C::Read (int):false")
- return false;
- }
-
- DEBUG_LEAVE("C24LCXX_I2C::Read (int) (false)")
- return false;
- }
-
- bool C24LCXX_I2C::Read(const short p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_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("C24LCXX_I2C::Read (vector) Failed to read length")
- return false;
- }
- DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
- if (length == 0) {
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (vector) (false)")
+ return false;
+}
+
+bool C24LCXX_I2C::Read(const short p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_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;
}
- 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_LEAVE("C24LCXX_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("C24LCXX_I2C::Read (string): Failed to read length")
+ return false;
+ }
+ wait(0.02);
+ DEBUG("C24LCXX_I2C::Read (string): length=%d", length)
+ if (length == 0) {
+ DEBUG_ERROR("C24LCXX_I2C::Read (string): empty")
+ return true;
}
- DEBUG("C24LCXX_I2C::Read (vector): length= %d", length)
-
- // 2. Memory address
- char i2cBuffer[2];
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Read (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Read (vector): %x", (bool)(result == 0))
- return (bool)(result == 0);
- }
+ 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_LEAVE("C24LCXX_I2C::Read (vector) (false)")
- return false;
}
-
- bool C24LCXX_I2C::Read(const short p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write) {
- DEBUG_ENTER("C24LCXX_I2C::Read (string): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+ DEBUG("C24LCXX_I2C::Read (string): Address=0x%02x - Length=%d", address, length)
+
+ // 2. Memory address
+ char i2cBuffer[2];
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
-/* std::vector<unsigned char> datas;
- if (Read(p_address, datas, p_readLengthFirst, p_length2write) == true) {
- p_string.assign((char *)datas.begin(), datas.size());
-
+ // 3. Send I2C start + memory address with repeat start
+ if (_i2cInstance->write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+ wait(0.02);
+ DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Read (string): Failed to read length")
- return false;
- }
- wait(0.02);
- DEBUG("C24LCXX_I2C::Read (string): length=%d", length)
- if (length == 0) {
- DEBUG_ERROR("C24LCXX_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("C24LCXX_I2C::Read (string): Address=0x%02x - Length=%d", address, length)
-
- // 2. Memory address
- char i2cBuffer[2];
- i2cBuffer[0] = (unsigned char)(address >> 8);
- DEBUG("C24LCXX_I2C::Read (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
- i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
- DEBUG("C24LCXX_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("C24LCXX_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("C24LCXX_I2C::Read (string) (false)")
- return false;
}
-#if defined(__DEBUG)
- void C24LCXX_I2C::DumpMemoryArea(const int p_address, const int p_count) {
- DEBUG_ENTER("C24LCXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)
-
- DEBUG("C24LCXX_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 << "C24LCXX_I2C::DumpMemoryArea: read failed\r" << std::endl;
+ DEBUG_LEAVE("C24LCXX_I2C::Read (string) (false)")
+ return false;
+}
+
+bool C24LCXX_I2C::Read(const short p_address, unsigned char * p_datas, bool p_readLengthFirst , int p_length2write)
+{
+ DEBUG_ENTER("C24LCXX_I2C::Read (char *): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+
+ // 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("C24LCXX_I2C::Read (char *): Failed to read length")
+ return false;
+ }
+ wait(0.02);
+ DEBUG("C24LCXX_I2C::Read (char *): length=%d", length)
+ if (length == 0) {
+ DEBUG_ERROR("C24LCXX_I2C::Read (char *): 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) {
+ // read the size of buffer
+ length = strlen((const char*)p_datas);
} else {
- std::cout << "C24LCXX_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
- HEXADUMP(&datas[0], p_count);
- std::cout << "\r" << std::endl;
+ length = p_length2write;
}
}
+ DEBUG("C24LCXX_I2C::Read (char *): Address=0x%02x - Length=%d", address, length)
+
+ // 2. Memory address
+ char i2cBuffer[2];
+ i2cBuffer[0] = (unsigned char)(address >> 8);
+ DEBUG("C24LCXX_I2C::Read (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("C24LCXX_I2C::Read (char *): 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("C24LCXX_I2C::Read (char *): Write memory done")
+ // 4. Read data + I2C stop
+ int result = _i2cInstance->read(_slaveAddress, (char *)p_datas, length);
+
+ HEXADUMP((unsigned char *) p_datas, length);
+
+ if (result == 0) {
+ return true;
+ }
+ }
+
+ DEBUG_LEAVE("C24LCXX_I2C::Read (char *) (false)")
+ return false;
+}
+
+
+#if defined(__DEBUG)
+void C24LCXX_I2C::DumpMemoryArea(const int p_address, const int p_count)
+{
+ DEBUG_ENTER("C24LCXX_I2C::DumpMemoryArea: %d - %d", p_address, p_count)
+
+ DEBUG("C24LCXX_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 << "C24LCXX_I2C::DumpMemoryArea: read failed\r" << std::endl;
+ } else {
+ std::cout << "C24LCXX_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
+ HEXADUMP(&datas[0], p_count);
+ std::cout << "\r" << std::endl;
+ }
+}
#endif // _DEBUG
} // End of namespace _24LCXX_I2C
--- a/24LCxx_I2C.h Wed May 21 19:58:39 2014 +0000
+++ b/24LCxx_I2C.h Tue Dec 23 17:21:25 2014 +0000
@@ -76,7 +76,11 @@
* - If A1 and A2 pins are tired to Vdd and A0 is tired to Vss, address shall '00000110'B
* - If A0 and A1 pins are tired to Vss and A2 is tired to Vdd, address shall '00000100'B
*/
- C24LCXX_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);
+ //C24LCXX_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);
+
+ /* defaults to a 24LC256: 256 kbit, 64Bytes PageSize */
+ C24LCXX_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,
+ const uint32_t deviceSize = 256, const uint8_t pageSize = 64);
/** Destructor
*/
@@ -187,7 +191,6 @@
/** 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.
@@ -277,6 +280,23 @@
*/
bool Read(const short p_address, std::string & p_string, bool p_readLengthFirst = true, int p_length2write = -1);
+ /** Read a buffer of characters from the specified memory address and store it into char array
+ *
+ * @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 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
+ * char[255] readtext;
+ * ...
+ * myEEPROM.Read(memoryAddress, readtext);
+ * ...
+ * @endcode
+ */
+ bool Read(const short p_address, unsigned char * p_datas, bool p_readLengthFirst = true, int p_length2write = -1);
+
/** Activate or deactivate write protect (pin 7)
*
* Note that a voltage of 3.3V apply to WP input of 24LCxx device is enough to enable write protect
@@ -309,9 +329,22 @@
#endif // _DEBUG
private:
+
+ /* write to EEPROM. Take care of pageBoundaries */
+ int i2cWrite(short address, const char *data, int length);
+
/** Internal reference identifier
*/
std::string _internalId;
+
+ /** pageSize of device in Bytes
+ */
+ uint8_t _pageSize;
+
+ /** Device Size of Device in Kbits
+ */
+ uint32_t _deviceSize;
+
}; // End of class C24LCXX_I2C