/*
 * ModbusRTUTransceiver.h
 *
 *      Author: Aleksey Gerasimenko
 *      gerasimenko.aleksey.n@gmail.com
 */

#include <math.h>
#include <stdint.h>


#include <DSP28x_Project.h>

#include "DSP28335/GPIO.h"
#include "DSP28335/CPUTimers.h"
#include "DSP28335/MeasureTimeInterval.h"
#include "DSP28335/SCIA.h"
#include "DSP28335/SCIB.h"
#include "DSP28335/SCIBase.h"
#include "DSP28335/SCIC.h"

#include "MODBUSRTU/ModbusRTUTransceiverBase.h"
#include "MODBUSRTU/ModbusRTUCRC.h"
#include "MODBUSRTU/ModbusRTUDefines.h"
#include "MODBUSRTU/ModbusRTUVariant.h"


#ifndef MODBUSRTU_MODBUSRTUTRANSCEIVER_H_
#define MODBUSRTU_MODBUSRTUTRANSCEIVER_H_

namespace MODBUSRTU
{


class ModbusRTUTransceiver
{
private:
    DSP28335::SCIBase&          m_sci_port;
    DSP28335::SCIConfiguration  m_sci_config;
    uint16_t                    m_node_id;
private:
    MODBUSRTU::transceiver_state_machine_t  m_state_machine;
    MODBUSRTU::transceiver_event_t          m_event;
private:
    DSP28335::MeasureTimeInterval&    m_interval_measure;
    Uint32 m_interval_pause;
    Uint32 m_interval_b5;
    Uint32 m_interval_b75;
    Uint32 m_interval_1b;
    Uint32 m_interval_1b25;
    Uint32 m_interval_1b5;
    Uint32 m_interval_1b75;
    Uint32 m_interval_3b5;
    Uint32 m_interval_freeze;
    Uint32 m_interval_current;
private:
    uint16_t m_rx_buffer[256];
    uint16_t m_tx_buffer[256];
    uint16_t m_rx_count;
    uint16_t m_tx_count;
    uint16_t m_tx_length;
    //
private:
    uint16_t     m_aux_rx_buf;
    uint16_t     m_aux_rx_count;
    uint16_t     m_aux_tx_buf;
    uint16_t     m_aux_tx_count;
private:
    bool            m_crc_status;
    MODBUSRTU::ModbusRTUCRC& m_crc;
    uint16_t        m_crc_calculate;
    uint16_t        m_crc_rx_frame;
    uint16_t        m_crc_tx_frame;
private:
    uint16_t *m_rx_external_buffer;
    uint16_t *m_tx_external_buffer;
    uint16_t *m_rx_messaage_length;
    uint16_t *m_tx_message_length;
private:
    uint16_t *m_destination;
    uint16_t *m_source_start;
    uint16_t *m_source_end;
    uint16_t m_copy_length;
public:
    ModbusRTUTransceiver(DSP28335::SCIBase& sciport, DSP28335::MeasureTimeInterval& interval_measure, MODBUSRTU::ModbusRTUCRC& crc);
    void setup(ModbusRTUTransceiverSetup& setup);
    void configure(ModbusRTUTransceiverConfiguration& config);
    void port_reset();
    bool compare_state(MODBUSRTU::transceiver_state_machine_t  state_machine);
public:
    void execute();
public:
    void setRXBuffer(uint16_t *bufferStart, uint16_t *messageLen);
    void setTXBuffer(uint16_t *bufferStart, uint16_t *messageLen);
private:
    void _set_receive_node_id();
    void _set_receive_function();
    void _set_receive_data();
    void _set_wait_response();
    void _set_transmit_data();
    void _set_break_condition();
private:
    void (ModbusRTUTransceiver::*_execute)();
    void (ModbusRTUTransceiver::*_frame_transceiver)();
    void _execute_transceiver();
    void _execute_break();
    void _frame_receive_node_id();
    void _frame_receive_function();
    void _frame_receive_data();
    void _frame_wait_response();
    void _frame_transmit_data();
    void _frame_break_condition();
private:
    inline void _frame_copy();
    inline void _frame_copy_erase();
    void _frame_copy(uint16_t *source, uint16_t length, uint16_t *destination);
private:
    void (*_re_de_setup)();
    void (*_driver_enable)();
    void (*_receiver_enable)();
};

} /* namespace MODBUSRTU */

#endif /* MODBUSRTU_MODBUSRTUTRANSCEIVER_H_ */