cadcf24a
Peter M. Groen
Setting up workin...
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#include "ConnectionConfig.h"
#include "ModbusAdapter.h"
#include <cstring> /// Added for memset functionality
ModbusAdapter::ModbusAdapter()
: m_modbus( nullptr )
{
this->InitBuffers();
}
ModbusAdapter::~ModbusAdapter()
{
}
void ModbusAdapter::ModbusConnect( const ConnectionConfig &conncfg )
{
if( m_connected )
{
this->ModbusDisconnect();
}
this->m_connType = conncfg.getType();
switch( m_connType )
{
case ConnectionType::CT_SERIAL:
this->ModbusConnectRTU( conncfg.getPort(), conncfg.getBaudRate(), conncfg.getParity(), conncfg.getDataBits(), conncfg.getStopBits(), conncfg.getTimeOut(), MODBUS_RTU_RTS_NONE );
break;
case ConnectionType::CT_TCP:
break;
default:
// throw a sensible message or return an errorcode.
break;
}
}
void ModbusAdapter::ModbusDisconnect()
{
if( m_modbus != nullptr )
{
if( m_connected )
{
modbus_close( m_modbus );
modbus_free( m_modbus );
}
// Clean up after ourselves.
m_modbus = nullptr;
}
m_connected = false;
}
modbusData ModbusAdapter::ModbusReadData( int slaveId, int functionCode, int startAddress, int noOfItems )
{
if( m_modbus == nullptr )
{
// No context
return modbusData();
}
int resultValue = -1;
bool is16Bit = false;
modbus_set_slave( m_modbus, slaveId );
// Request data from modbus.
switch( functionCode )
{
case MODBUS_FC_READ_COILS:
resultValue = modbus_read_bits( m_modbus, startAddress, noOfItems, m_dest );
break;
case MODBUS_FC_READ_DISCRETE_INPUTS:
resultValue = modbus_read_input_bits( m_modbus, startAddress, noOfItems, m_dest );
break;
case MODBUS_FC_READ_HOLDING_REGISTERS:
resultValue = modbus_read_registers( m_modbus, startAddress, noOfItems, m_dest16 );
break;
case MODBUS_FC_READ_INPUT_REGISTERS:
resultValue = modbus_read_input_registers( m_modbus, startAddress, noOfItems, m_dest16 );
break;
default:
break;
}
// Read the databuffers
if( resultValue != noOfItems )
{
return modbusData();
}
modbusData resultData;
for( int index = 0; index < noOfItems; ++index )
{
resultData.push_back( (is16Bit ? static_cast<uint16_t>(m_dest16[index]) : static_cast<uint16_t>(m_dest[index])) );
}
modbus_flush( m_modbus ); // flush data
this->ClearBuffers();
return resultData;
}
modbusData ModbusAdapter::ModbusReadHoldReg( int slaveId, int startAddress, int noOfItems )
{
if( m_modbus == nullptr )
{
return modbusData();
}
int resultValue = -1; /// Return value from read functions
// -- Start Critical Section --- ?? //
modbus_set_slave( m_modbus, slaveId );
/// Request data from modbus
resultValue = modbus_read_registers( m_modbus, startAddress, noOfItems, m_dest16 );
/// Read the databuffers
if( resultValue != noOfItems )
{
return modbusData();
}
modbusData resultData;
for( int index = 0; index < noOfItems; ++index )
{
resultData.push_back( static_cast<uint16_t>(m_dest16[index]) );
}
modbus_flush( m_modbus );
this->ClearBuffers();
// -- End Critical Section --- ?? //
return resultData;
}
void ModbusAdapter::ModBusWriteData( int slaveId, int functionCode, int startAddress, int noOfItems, std::vector<int>values )
{
if( m_modbus == nullptr )
{
return;
}
// ------------------------------------------------
// Create 8 bits databuffer
auto * data8 = new uint8_t[noOfItems];
for( int index = 0; index < noOfItems; ++index )
{
data8[index] = values[index];
}
// Create same buffer for 16 bits data
auto * data16 = new uint8_t[noOfItems];
for( int index = 0; index < noOfItems; ++index )
{
data16[index] = values[index];
}
// ------------------------------------------------
int resultValue = -1;
modbus_set_slave( m_modbus, slaveId );
// Request data from modbus
switch( functionCode )
{
case MODBUS_FC_WRITE_SINGLE_COIL:
resultValue = modbus_write_bit( m_modbus, startAddress, values[0] );
noOfItems = 1;
break;
case MODBUS_FC_WRITE_SINGLE_REGISTER:
resultValue = modbus_write_register( m_modbus, startAddress, values[0] );
noOfItems = 1;
break;
case MODBUS_FC_WRITE_MULTIPLE_COILS:
resultValue = modbus_write_bits( m_modbus, startAddress, noOfItems, data8 );
break;
case MODBUS_FC_WRITE_MULTIPLE_REGISTERS:
resultValue = modbus_write_bits( m_modbus, startAddress, noOfItems, data16 );
break;
}
delete[] data8;
delete[] data16;
modbus_flush(m_modbus); // Flush data.
if( resultValue != noOfItems )
{
// Create a log line that writing the register failed. Maybe increment ErrorCounter(s)
}
}
bool ModbusAdapter::isConnected() const
{
return m_connected;
}
std::string ModbusAdapter::ErrorString( int errnum )
{
switch(errnum)
{
case EINVAL:
return "Protocol context is NULL";
break;
case ETIMEDOUT:
return "Timeout";
break;
case ECONNRESET:
return "Connection reset";
break;
case ECONNREFUSED:
return "Connection refused";
break;
case EPIPE:
return "Socket error";
break;
default:
return modbus_strerror(errno);
}
}
/* ============= PRIVATE METHODS ============= */
void ModbusAdapter::ModbusConnectRTU( const std::string &serialport, int baud, char parity, int dataBits, int stopBits, int RTS, int timeOut )
{
m_modbus = modbus_new_rtu( serialport.c_str(), baud, parity, dataBits, stopBits, RTS );
#ifdef LIB_MODBUS_DEBUG_OUTPUT
// Do sensible logging through PRIVA_LOG
m_modbus_set_debug( m_modbus, 1 );
#endif
if( m_modbus == nullptr )
{
// We can stop here. Nothing to be done as we don't have a valid context
// Log to PRIVA_LOG
return;
}
else if( m_modbus && modbus_connect( m_modbus ) == -1 )
{
// We could not connect to the selected serial port.
// We can stop here. Nothing to be done as we don't have a valid connection
modbus_free( m_modbus );
m_connected = false;
return;
}
// Set recovery mode
modbus_set_error_recovery( m_modbus, MODBUS_ERROR_RECOVERY_PROTOCOL );
// Set the response timeout
modbus_set_response_timeout( m_modbus, timeOut, 0 );
m_connected = true;
}
void ModbusAdapter::ModbusConnectTCP( const std::string &ip, int port, int timeOut )
{
if( ip.empty() )
{
// Nothing to be done. Set an Logline to PRIVA_LOG and exit.
return;
}
m_modbus = modbus_new_tcp( ip.c_str(), port );
#ifdef LIB_MODBUS_DEBUG_OUTPUT
// Do sensible logging through PRIVA_LOG
m_modbus_set_debug( m_modbus, 1 );
#endif
if( m_modbus == nullptr )
{
// We can stop here. Nothing to be done as we don't have a valid context
// Log to PRIVA_LOG
return;
}
else if( m_modbus && modbus_connect( m_modbus ) == -1 )
{
// We could not connect to the selected serial port.
// We can stop here. Nothing to be done as we don't have a valid connection
modbus_free( m_modbus );
m_connected = false;
return;
}
// Set recovery mode
modbus_set_error_recovery( m_modbus, MODBUS_ERROR_RECOVERY_PROTOCOL );
// Set the response timeout
modbus_set_response_timeout( m_modbus, timeOut, 0 );
m_connected = true;
}
void ModbusAdapter::InitBuffers()
{
// Setup memory for Data.
m_dest = (uint8_t *)malloc(2000 + sizeof(uint8_t));
m_dest16 = (uint16_t *)malloc(125 * sizeof(uint16_t));
this->ClearBuffers();
}
void ModbusAdapter::ClearBuffers()
{
memset(m_dest, 0, 2000 * sizeof(uint8_t));
memset(m_dest16, 0, 125 * sizeof(uint16_t));
}
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