nBus-bridge/Core/Inc/NbusSlave.h

/**
 * @file AppBridge.h
 * @brief nBus Slave module declaration.
 * @date Nov 26, 2025
 * @author Juraj Dudak, Matus Necas
 */
#ifndef SRC_APPSLAVE_H_
#define SRC_APPSLAVE_H_

#include "inttypes.h"
#include "dataframe.h"
#include "NbusCommunicator.h"

/** @brief Class for nBus slave communication
 */
class NbusSlave
{
public:
	/** Set nBus communicator.
	 * @param nbus_comm: communicator to set
	 */
	void setCommunicator(NbusCommunicator* nbus_comm);

	/** Set nBus address.
	 * @param addr: address to set
	 */
	void setModuleAddress(uint8_t addr);

	/** Get slave active status.
	 * @return: active status (1 = active, 0 = inactive)
	 */
	bool isActive();

	/** Get nBus module address.
     * @return: actual address (0 if not set)
	 */
	uint8_t getModuleAddress();

	/** Send any nBus request and get response.
	 * @param slave_frame: data to send
	 * @return: response data frame
	 */
	DataFrame* cmdProcessAnyRequest(DataFrame *slave_frame);

	/** Send nBus request and get sensor data.
	 * @return: response data frame
	 */
	DataFrame* cmdGetData();

	/** Send nBus request and get sensor format.
	 * @return: response data frame
	 */
	DataFrame* cmdGetFormat();

	/** Send nBus request and get sensor count.
	 * @param check_hw: 1 = load from bus, 0 = use local cache
	 * @return: number of sensors / actuators
	 */
	Nbus_SensorCnt_t cmdGetSensorCnt(bool check_hw);

private:
	/** Make nBus packet for selected function code.
	 * @param fc: function code
	 * @return: _slave_cache
	 */
	DataFrame* _makePacket(Nbus_FC_e fc);

	NbusCommunicator* _communicator{nullptr};											///< hardware bus communicator
	Nbus_SensorCnt_t _sensor_count{0, 0};												///< number of sensors / actuators
	Nbus_PDU_t _pdu{0, 0, FC_ECHO}; 													///< slave PDU
	uint8_t _slave_cache[NBUS_SLAVE_CACHE_SIZE]{0};									    ///< slave temporary data
	DataFrame _cache_frame{_slave_cache, NBUS_SLAVE_CACHE_SIZE, TYPE_PLAIN, CRC_ON};    ///< data frame of _slave_cache
};


#endif /* SRC_APPSLAVE_H_ */