This class provides simplified I2C access to a MAXIM DS130x Real-Time Clock device, even if the LPC1768 has an embedded RTC module. My objective is to share the same RTC with Microchip 18F MCU.
Diff: DS130x_I2C.cpp
- Revision:
- 0:a1b58e3c9fdb
- Child:
- 1:834e9897e269
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DS130x_I2C.cpp Wed Feb 09 13:43:21 2011 +0000
@@ -0,0 +1,598 @@
+#include <iostream>
+
+#include "DS130x_I2C.h"
+
+namespace DS130X_I2C {
+
+CDS130X_I2C::CDS130X_I2C(const unsigned char p_slaveAddress, const PinName p_sda, const PinName p_scl, const CDS130X_I2C::OscillatorMode p_oscillatorMode, const bool p_outputLevel, const int p_frequency) : I2C(p_sda, p_scl, "DS130X_I2C"), _dayOfWeek("SunMonTueWedThuFriSat") {
+ DEBUG_ENTER("CDS130X_I2C::CDS130X_I2C: %02x - %x - %d", p_slaveAddress, p_oscillatorMode, p_frequency)
+
+ _slaveAddress = p_slaveAddress;
+ frequency(p_frequency); // Set the frequency of the I2C interface
+ _oscillatorMode = p_oscillatorMode;
+ _outputLevel = p_outputLevel;
+
+ DEBUG_LEAVE("CDS130X_I2C::CDS130X_I2C")
+}
+
+CDS130X_I2C::~CDS130X_I2C() {
+ DEBUG_ENTER("~CDS130X_I2C")
+
+ DEBUG_LEAVE("~CDS130X_I2C")
+}
+
+bool CDS130X_I2C::Initialize() {
+ DEBUG_ENTER("CDS130X_I2C::Initialize")
+
+ // 1. Set control register
+ unsigned char controlRegisterValue = 0x00;
+ switch (_oscillatorMode) { // See Datasheet - Clause CONTROL REGISTER
+ case CDS130X_I2C::One_Hz:
+ controlRegisterValue = 0x10;
+ break;
+ case CDS130X_I2C::Four_KHz:
+ controlRegisterValue = 0x11;
+ break;
+ case CDS130X_I2C::Height_KHz:
+ controlRegisterValue = 0x12;
+ break;
+ case CDS130X_I2C::ThirtyTwo_KHz:
+ controlRegisterValue = 0x13;
+ break;
+ case CDS130X_I2C::Output:
+ controlRegisterValue = (_outputLevel == true) ? 0x80 : 0x00;
+ break;
+ } // End of 'switch' statement
+ DEBUG("CDS130X_I2C::Initialize: controlRegisterValue = 0x%02x", controlRegisterValue)
+ // Write the control register
+ if (!Write(CDS130X_I2C::ControlRegisterAddress, controlRegisterValue)) {
+ DEBUG_ERROR("CDS130X_I2C::Initialize: I2C write operation failed")
+ return false;
+ } // else continue
+
+ // 2. Set the date format: Hours<6> set to 0 for 24-hour mode - See datasheet - Table 2. Timekeeper Registers
+ DEBUG("CDS130X_I2C::Initialize: Set date format")
+ // 1. Read hours
+ unsigned char hoursRegister = 0xff;
+ if (Read(CDS130X_I2C::HoursAddress, &hoursRegister) == (unsigned char)0) {
+ DEBUG("CDS130X_I2C::Initialize: hours:%x", hoursRegister)
+ // 2. Set bit 6 to 0
+ hoursRegister &= 0xbf; // 1011 1111
+ // 3. Write new value
+ if (Write(CDS130X_I2C::HoursAddress, hoursRegister)) {
+ DEBUG_ERROR("CDS130X_I2C::Initialize: Failed to set date format")
+ }
+ } else {
+ DEBUG_ERROR("CDS130X_I2C::Initialize: Failed to set date format")
+ }
+
+ // 3. Set CH bit is Seconds register - See Datasheet - Clause CLOCK AND CALENDAR
+ bool result = ControlClock(true);
+
+ DEBUG_LEAVE("CDS130X_I2C::Initialize: %x", result)
+ return result;
+} // End of method CDS130X_I2C::Initialize
+
+bool CDS130X_I2C::RestartClock() {
+ return ControlClock(true);
+} // End of method CDS130X_I2C::RestartClock
+
+bool CDS130X_I2C::HaltClock() {
+ return ControlClock(false);
+} // End of method CDS130X_I2C::HaltClock
+
+bool CDS130X_I2C::ControlClock(bool p_mode) {
+ DEBUG_ENTER("CDS130X_I2C::ControlClock")
+
+ // 1. Read seconds
+ unsigned char secondsRegister = 0x00;
+ if (Read(CDS130X_I2C::SecondsAddress, &secondsRegister)) {
+ DEBUG("CDS130X_I2C::ControlClock: seconds register = 0x%02x", secondsRegister)
+ // 2. Set bit
+ if (!p_mode) {
+ secondsRegister |= 0x80; // Set CH bit to halt oscilator
+ } else {
+ secondsRegister &= 0x7f; // Unset CH bit to restart oscilator
+ }
+ DEBUG("CDS130X_I2C::ControlClock: seconds register (new value) = 0x%02x - mode: %x", secondsRegister, p_mode)
+ // 3. Write new value
+ if (Write(CDS130X_I2C::SecondsAddress, secondsRegister)) {
+ DEBUG_LEAVE("CDS130X_I2C::ControlClock (true)")
+ return true;
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ControlClock (false)")
+ return false;
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ControlClock (false)")
+ return false;
+} // End of method CDS130X_I2C::ControlClock
+
+bool CDS130X_I2C::Read(const RegisterEnum p_address, unsigned char * p_byte, const CDS130X_I2C::RegisterFormatEnum p_format) {
+ DEBUG_ENTER("CDS130X_I2C::Read")
+
+ // 1. Read seconds
+ char i2cBuffer[1];
+ i2cBuffer[0] = (char)(unsigned char)p_address;
+ // Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 1, true) == 0) {
+ // 2. Read data + I2C stop
+ int result = read(_slaveAddress, (char *)p_byte, 1);
+ wait(0.02);
+
+ // 3. Format convertion
+ if (p_format == CDS130X_I2C::Binary) {
+ switch ((RegisterEnum)p_address) {
+ case CDS130X_I2C::SecondsAddress:
+ //No break;
+ case CDS130X_I2C::MinutesAddress:
+ *p_byte = ConvertBCDToHex(*p_byte & 0x7f); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::HoursAddress:
+ //No break;
+ case CDS130X_I2C::DayAddress:
+ *p_byte = ConvertBCDToHex(*p_byte & 0x3f); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::DayOfWeekAddress:
+ *p_byte = ConvertBCDToHex(*p_byte & 0x03); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::MonthAddress:
+ *p_byte = ConvertBCDToHex(*p_byte & 0x1f); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::YearAddress:
+ *p_byte = ConvertBCDToHex(*p_byte); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ } // End of 'switch' statement
+ } // else nothing to do
+
+ DEBUG_LEAVE("CDS130X_I2C::Read %d", (int)*p_byte)
+ return true;
+ }
+
+
+ DEBUG_LEAVE("CDS130X_I2C::Read (false)")
+ return false;
+} // End of method CDS130X_I2C::Read
+
+bool CDS130X_I2C::Write(const RegisterEnum p_address, const unsigned char p_byte, const CDS130X_I2C::RegisterFormatEnum p_format) {
+ DEBUG_ENTER("CDS130X_I2C::Write")
+
+ // 1. Format convertion
+ unsigned char value = p_byte;
+ if (p_format == CDS130X_I2C::Binary) {
+ switch ((RegisterEnum)p_address) {
+ case CDS130X_I2C::SecondsAddress:
+ //No break;
+ case CDS130X_I2C::MinutesAddress:
+ value = ConvertHexToBCD(p_byte) & 0x7f; // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::HoursAddress: // Force Hours<6> set to 0 for 24-hour mode - See datasheet - Table 2. Timekeeper Registers
+ //No break;
+ case CDS130X_I2C::DayAddress:
+ value = ConvertHexToBCD(p_byte) & 0x3f; // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::DayOfWeekAddress:
+ value = ConvertHexToBCD(p_byte) & 0x03; // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::MonthAddress:
+ value = ConvertHexToBCD(p_byte) & 0x1f; // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ case CDS130X_I2C::YearAddress:
+ value = ConvertHexToBCD(p_byte); // Convert hex to BCD - See datasheet - Table 2. Timekeeper Registers
+ break;
+ } // End of 'switch' statement
+ } // else nothing to do
+
+ // 2. Read seconds
+ char i2cBuffer[2];
+ i2cBuffer[0] = (char)(unsigned char)p_address;
+ i2cBuffer[1] = value;
+ // Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 2) == 0) {
+ wait(0.02);
+ DEBUG_LEAVE("CDS130X_I2C::Write (true)")
+ return true;
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::Write (false)")
+ return false;
+} // End of method CDS130X_I2C::Write
+
+bool CDS130X_I2C::SetTime(const std::string p_utcTime) {
+ DEBUG_ENTER("CDS130X_I2C::SetTime: %s - %d", p_utcTime.c_str(), p_utcTime.length())
+
+ // Sanity checks
+ if (p_utcTime.length() != 23) {
+ DEBUG_ERROR("CDS130X_I2C::SetTime: Wrong parameters")
+ return false;
+ }
+ // Fill struct tm;
+ struct tm t = {0};
+ char wday[4] = {0};
+ scanf("%s %02d %02d %02d:%02d:%02d %04d", /* Www MM dd hh:mm:ss yyyy */
+ wday,
+ &t.tm_mon,
+ &t.tm_mday,
+ &t.tm_hour,
+ &t.tm_min,
+ &t.tm_sec,
+ &t.tm_year);
+
+ DEBUG("CDS130X_I2C::SetTime: wday=%s - tm_wday=%d", wday, _dayOfWeek.find_first_of(wday) / 3);
+ t.tm_wday = _dayOfWeek.find_first_of(wday) / 3;
+
+ Write(CDS130X_I2C::SecondsAddress, t.tm_sec, Binary);
+ Write(CDS130X_I2C::MinutesAddress, t.tm_min, Binary);
+ Write(CDS130X_I2C::HoursAddress, t.tm_hour, Binary);
+ Write(CDS130X_I2C::DayOfWeekAddress, t.tm_wday, Binary);
+ Write(CDS130X_I2C::DayAddress, t.tm_mday, Binary);
+ Write(CDS130X_I2C::MonthAddress, t.tm_mon, Binary);
+ Write(CDS130X_I2C::YearAddress, t.tm_year, Binary);
+
+ return true;
+} // End of method CDS130X_I2C::SetTime
+
+struct tm CDS130X_I2C::GetTime() {
+ DEBUG_ENTER("CDS130X_I2C::GetTime")
+
+ struct tm t;
+ unsigned char value;
+ // Setup time structure from RTC
+ Read(CDS130X_I2C::SecondsAddress, &value, Binary);
+ t.tm_sec = value;
+ Read(CDS130X_I2C::MinutesAddress, &value, Binary);
+ t.tm_min = value;
+ Read(CDS130X_I2C::HoursAddress, &value, Binary);
+ t.tm_hour = value;
+ Read(CDS130X_I2C::DayOfWeekAddress, &value, Binary);
+ t.tm_wday = value;
+ Read(CDS130X_I2C::DayAddress, &value, Binary);
+ t.tm_mday = value;
+ Read(CDS130X_I2C::MonthAddress, &value, Binary);
+ t.tm_mon = value;
+ Read(CDS130X_I2C::YearAddress, &value, Binary);
+ t.tm_year = value;
+ DEBUG("CDS130X_I2C::GetTime: %02d %02d %02d %02d:%02d:%02d %04d", /* ww mm dd hh:mm:ss yyyy */
+ t.tm_wday,
+ t.tm_mon,
+ t.tm_mday,
+ t.tm_hour,
+ t.tm_min,
+ t.tm_sec,
+ t.tm_year);
+
+ DEBUG_LEAVE("CDS130X_I2C::GetTime")
+ return t;
+} // End of method CDS130X_I2C::GetTime
+
+bool CDS130X_I2C::EraseMemoryArea(const unsigned char p_startAddress, const int p_count, const unsigned char p_pattern) {
+ DEBUG_ENTER("CDS130X_I2C::EraseMemoryArea): 0x%02x - %d - 0x%02x", p_startAddress, p_count, p_pattern)
+
+ std::vector<unsigned char> eraseBuffer(p_count, p_pattern);
+ return WriteMemory(p_startAddress, eraseBuffer, false);
+}
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const unsigned char p_byte) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (byte): Memory address: 0x%02x", p_address)
+
+ // 1.Prepare buffer
+ char i2cBuffer[2]; // Memory address + one byte of data
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::WriteMemory (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ // 1.2. Datas
+ i2cBuffer[1] = p_byte;
+ DEBUG("CDS130X_I2C::WriteMemory (byte): value=0x%02x", i2cBuffer[1])
+
+ // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+ int result = write(_slaveAddress, i2cBuffer, 2);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::WriteMemory (byte) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const short p_short, const CDS130X_I2C::Mode p_mode) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+
+ // 1.Prepare buffer
+ char i2cBuffer[3]; // Memory address + one short (2 bytes)
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::WriteMemory (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ // 1.2. Datas
+ if (p_mode == BigEndian) {
+ i2cBuffer[1] = (unsigned char)(p_short >> 8);
+ i2cBuffer[2] = (unsigned char)((unsigned char)p_short & 0xff);
+ } else {
+ i2cBuffer[1] = (unsigned char)((unsigned char)p_short & 0xff);
+ i2cBuffer[2] = (unsigned char)(p_short >> 8);
+ }
+ DEBUG("CDS130X_I2C::WriteMemory (byte): value=0x%02x%02x", i2cBuffer[1], i2cBuffer[2])
+
+ // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+ int result = write(_slaveAddress, i2cBuffer, 3);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::WriteMemory (short) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const int p_int, const CDS130X_I2C::Mode p_mode) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+
+ // 1.Prepare buffer
+ char i2cBuffer[5]; // Memory address + one integer (4 bytes)
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::WriteMemory (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ // 1.2. Datas
+ if (p_mode == BigEndian) {
+ i2cBuffer[1] = (unsigned char)(p_int >> 24);
+ i2cBuffer[2] = (unsigned char)(p_int >> 16);
+ i2cBuffer[3] = (unsigned char)(p_int >> 8);
+ i2cBuffer[4] = (unsigned char)((unsigned char)p_int & 0xff);
+ } else {
+ i2cBuffer[1] = (unsigned char)((unsigned char)p_int & 0xff);
+ i2cBuffer[2] = (unsigned char)(p_int >> 8);
+ i2cBuffer[3] = (unsigned char)(p_int >> 16);
+ i2cBuffer[4] = (unsigned char)(p_int >> 24);
+ }
+ DEBUG("CDS130X_I2C::WriteMemory (byte): value=0x%02x%02x%02x%02x", i2cBuffer[1], i2cBuffer[2], i2cBuffer[3], i2cBuffer[4])
+
+ // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+ int result = write(_slaveAddress, i2cBuffer, 5);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::WriteMemory (int) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const std::string & p_string, const bool p_storeLength, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (std::string)")
+ return WriteMemory(p_address, p_string.c_str(), p_storeLength, p_length2write);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const std::vector<unsigned char> & p_datas, const bool p_storeLength, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (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 = WriteMemory(p_address, array, p_storeLength, length);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::WriteMemory (std::vector): %d", result)
+ return result;
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const char *p_datas, const bool p_storeLength, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (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 += 1; // Add one byte for the length
+ }
+ DEBUG("CDS130X_I2C::WriteMemory (char *): length:%d", length)
+
+ char i2cBuffer[1 + length];
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::WriteMemory (char *): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ // 1.2. Datas
+ if (p_storeLength) {
+ // Fill the length
+ i2cBuffer[1] = (unsigned char)length;
+ for (int i = 0; i < length; i++) {
+ i2cBuffer[2 + i] = *(p_datas + i);
+ }
+ } else { // The length was not stored
+ for (int i = 0; i < length; i++) {
+ i2cBuffer[1 + i] = *(p_datas + i);
+ }
+ }
+
+ // 2. Send I2C start + I2C address + Memory Address + Datas + I2C stop
+ int result = write(_slaveAddress, i2cBuffer, 1 + length);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::WriteMemory (char *) %x", (bool)(result == 0))
+ return (bool)(result == 0);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::WriteMemory(const unsigned char p_address, const unsigned char *p_datas, const bool p_storeLength, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::WriteMemory (byte *): Memory address: 0x%02x", p_address, p_storeLength, p_length2write)
+ return WriteMemory(p_address, (const char *)p_datas, p_storeLength, p_length2write);
+} // End of method CDS130X_I2C::WriteMemory
+
+bool CDS130X_I2C::ReadMemory(const unsigned char p_address, unsigned char * p_byte) {
+ DEBUG_ENTER("CDS130X_I2C::ReadMemory (byte): Memory address:0x%02x", p_address)
+
+ // 1.Prepare buffer
+ char i2cBuffer[1];
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::ReadMemory (byte): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+
+ // 2. Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 1, true) == 0) {
+ // 2. Read data + I2C stop
+ int result = read(_slaveAddress, (char *)p_byte, 1);
+ wait(0.02);
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (byte): %x", (bool)(result == 0))
+ return (bool)(result == 0);
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (byte) (false)")
+ return false;
+} // End of method CDS130X_I2C::ReadMemory
+
+bool CDS130X_I2C::ReadMemory(const unsigned char p_address, short *p_short, const CDS130X_I2C::Mode p_mode) {
+ DEBUG_ENTER("CDS130X_I2C::ReadMemory (short): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+
+ // 1.Prepare buffer
+ char i2cBuffer[2];
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::ReadMemory (short): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+
+ // 2. Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 1, true) == 0) {
+ // 2. Read data + I2C stop
+ int result = read(_slaveAddress, i2cBuffer, 2);
+ wait(0.02);
+ if (p_mode == BigEndian) {
+ *p_short = (short)(i2cBuffer[0] << 8 | i2cBuffer[1]);
+ } else {
+ *p_short = (short)(i2cBuffer[1] << 8 | i2cBuffer[0]);
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (short): %x", (bool)(result == 0))
+ return (bool)(result == 0);
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (short) (false)")
+ return false;
+} // End of method CDS130X_I2C::ReadMemory
+
+bool CDS130X_I2C::ReadMemory(const unsigned char p_address, int *p_int, const CDS130X_I2C::Mode p_mode) {
+ DEBUG_ENTER("CDS130X_I2C::ReadMemory (int): Memory address:0x%02x, Mode:%d", p_address, p_mode)
+
+ // 1.Prepare buffer
+ char i2cBuffer[4];
+ // 1.1. Memory address
+ i2cBuffer[0] = CDS130X_I2C::BaseMemoryAddress + p_address;
+ DEBUG("CDS130X_I2C::ReadMemory (int): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+
+ // 2. Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 1, true) == 0) {
+ // 2. Read data + I2C stop
+ int result = read(_slaveAddress, i2cBuffer, 4);
+ 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("CDS130X_I2C::ReadMemory (int): %x", (bool)(result == 0))
+ return (bool)(result == 0);
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (int) (false)")
+ return false;
+} // End of method CDS130X_I2C::ReadMemory
+
+bool CDS130X_I2C::ReadMemory(const unsigned char p_address, std::vector<unsigned char> & p_datas, const bool p_readLengthFirst, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::ReadMemory (vector): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+
+ // 1.Prepare buffer
+ unsigned char address = CDS130X_I2C::BaseMemoryAddress + p_address;
+ int length;
+ if (p_readLengthFirst) {
+ ReadMemory(address, &length); // Read the length in big endian mode
+ address += 1; // Skip the length value
+ length -= 1; // length is the size of (string length + string)
+ } else {
+ if (p_length2write == -1) {
+ length = p_datas.size();
+ } else {
+ length = p_length2write;
+ }
+ }
+
+ // 2. Memory address
+ char i2cBuffer[1];
+ i2cBuffer[0] = address;
+ DEBUG("CDS130X_I2C::ReadMemory (vector): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+
+ // 3. Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 1, true) == 0) {
+ // 4. read data + I2C stop
+ unsigned char buffer[length];
+ int result = read(_slaveAddress, (char *)buffer, length);
+ wait(0.02);
+ if (result == 0) {
+ p_datas.assign(buffer, buffer + length);
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (vector): %x", (bool)(result == 0))
+ return (bool)(result == 0);
+ }
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (vector) (false)")
+ return false;
+} // End of method CDS130X_I2C::ReadMemory
+
+bool CDS130X_I2C::ReadMemory(const unsigned char p_address, std::string & p_string, const bool p_readLengthFirst, const int p_length2write) {
+ DEBUG_ENTER("CDS130X_I2C::ReadMemory (string): Memory address:0x%02x, readLength:%01x, Length:%d", p_address, p_readLengthFirst, p_length2write)
+
+ // 1.Prepare buffer
+ unsigned char address = CDS130X_I2C::BaseMemoryAddress + p_address;
+ int length;
+ if (p_readLengthFirst) { // The string was stored with its length
+ if (!ReadMemory(address, &length)) { // Read the length in big endian mode
+ DEBUG_ERROR("CDS130X_I2C::ReadMemory (string): Failed to read length")
+ return false;
+ }
+ wait(0.02);
+ 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("CDS130X_I2C::ReadMemory (string): Length=%d", length)
+
+ // 2. Memory address
+ char i2cBuffer[2];
+ i2cBuffer[0] = address;
+ DEBUG("CDS130X_I2C::ReadMemory (string): pI2CBuffer[0]: 0x%02x", i2cBuffer[0])
+ i2cBuffer[1] = (unsigned char)((unsigned char)address & 0xff);
+ DEBUG("CDS130X_I2C::ReadMemory (string): pI2CBuffer[1]: 0x%02x", i2cBuffer[1])
+
+ // 3. Send I2C start + memory address
+ if (write(_slaveAddress, i2cBuffer, 2, true) == 0) {
+ // 4. Read data + I2C stop
+ char buffer[length];
+ int result = read(_slaveAddress, (char *)buffer, length);
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (string): %d", result)
+ if (result == 0) {
+ p_string.assign(buffer, length);
+
+ return true;
+ }
+ }
+
+ DEBUG_LEAVE("CDS130X_I2C::ReadMemory (string) (false)")
+ return false;
+} // End of method CDS130X_I2C::ReadMemory
+
+#if defined(__DEBUG)
+void CDS130X_I2C::DumpMemoryArea(const unsigned char p_address, const int p_count) {
+ DEBUG_ENTER("CDS130X_I2C::DumpMemoryArea: %02x - %d", p_address, p_count)
+
+ DEBUG("CDS130X_I2C::DumpMemoryArea: Reading datas...");
+ std::vector<unsigned char> datas(p_count);
+ if (!ReadMemory((unsigned char)CDS130X_I2C::BaseMemoryAddress + p_address, datas, false)) { // Read bytes, including the lenght indication, buffer size is not set before the call
+#ifdef __DEBUG
+ DEBUG_FATAL("CDS130X_I2C::DumpMemoryArea: read failed")
+#else // __DEBUG
+ std::cout << "CDS130X_I2C::DumpMemoryArea: read failed\r" << std::endl
+#endif // __DEBUG
+ } else {
+ std::cout << "CDS130X_I2C::DumpMemoryArea: Read bytes:\r" << std::endl;
+ HEXADUMP(&datas[0], p_count);
+ std::cout << "\r" << std::endl;
+ }
+} // End of method CDS130X_I2C::DumpMemoryArea
+#endif // _DEBUG
+
+} // End of namespace DS130X_I2C
Yann Garcia