nBus-bridge/Core/Src/NbusBridge.cpp

/*
 * @file NbusBridge.cpp
 * @brief Implemetnácia modulu nBus Brige
 * @date Mar 7, 2025
 * @author Juraj Dudak
 */

#include "NbusBridge.h"
#include "dataframe.h"

NbusBridge::NbusBridge(NbusCommunicator *nc) {
	if(nc == NULL)
	{
		while(1){
			__NOP();
		}
	}
	_communicator = nc;
	_num_slaves = 0;
}

NbusBridge::~NbusBridge() {
	// empty
}


void NbusBridge::scan(){
	_num_slaves = 0;

	DataFrame *frame;
	uint8_t *response;
	Nbus_pdu pdu;
	pdu.fc = FC_ECHO;
	pdu.sa = SLAVE_ADDRESS_MODULE;
	uint8_t data[4] = {110, 66, 117, 115};	// nBus
	const uint8_t data_offset = 4;

	for(uint32_t i = 1 ; i < MAX_SLAVES; i++){
		pdu.ma = i;
		frame = _communicator->send(&pdu, data, 4);
		if (!frame->IsEmpty()){
			response = frame->GetFrame();
			if(response[0+data_offset] == 110 && response[1+data_offset] == 66 && response[2+data_offset] == 117 && response[3+data_offset] == 115) {
				_num_slaves++;
				_slaves[i].setAddress(i);
				_slaves[i].setCommunicator(_communicator);
			}
		}
	}
}

NbusSlave * NbusBridge::getSlave(uint8_t index){
	if(index >= 0 && index < MAX_SLAVES){
		if (_slaves[index].isActive()) {
			return &_slaves[index];
		}
	}
	return NULL;
}

uint8_t NbusBridge::getNumSlaves(){
	return _num_slaves;
}

bool NbusBridge::call_echo(uint8_t slave){
	if(slave >= _num_slaves){
			return false;
	}
	if(slave == 0){
		for(uint32_t i = 0 ; i<_num_slaves ; i++){
			getSlave(i)->nbus_echo();
		}
		return true;
	}
	getSlave(slave)->nbus_echo();
	return true;
}

void NbusBridge::sendResponseToMaster(DataFrame *response_frame){
	if(response_frame !=NULL && response_frame->IsEmpty() == false) {
		_communicator->sendToMaster(response_frame);
	}
}

void NbusBridge::processRequest(uint8_t *rxFrame){
	uint8_t send_reponse = 1;
	NbusSlave *selected_slave = getSlave(MODULE_ADDRESS(rxFrame));
	if (selected_slave == NULL){
		return;
	}

	if (!selected_slave->isActive()){
		return;
	}

	switch(FUNCTION_CODE(rxFrame)) {

	case FC_FIND:			/* 0 */
		// Not implemented yet
	break;

	case FC_ECHO:			/* 1 */
		_frame_nbus_internal = selected_slave->nbus_echo();
		break;

	case FC_STOP:			/* 2 */
		break;

	case FC_START:			/* 3 */
		break;

	case FC_PARAM:			/* 4 */
		break;

	case FC_SENSOR_CNT:		/* 5 */
		_frame_nbus_internal = selected_slave->nbus_sensor_count();
		break;

	case FC_SLEEP:			/* 6 */
		break;

	case FC_WAKEUP:			/* 7 */
		break;

	case FC_CALIBRATE:		/* 8 */
		break;

	case FC_RESET:			/* 9 */
		break;

	case FC_STORE:			/* 0xA => 10 */
		break;

	case FC_DATA:			/* 0xB => 11 */
		break;

	case FC_SYNC:			/* 0xC => 12 */
		break;

	case FC_SENSOR_TYPE:	/* 0xD => 13 */
		_frame_nbus_internal = selected_slave->nbus_sensor_type(SENSOR_ADDRESS(rxFrame));
		break;

	case FC_INFO:			/* 0xE => 14 */
		_frame_nbus_internal = selected_slave->nbus_module_info();
		break;

	case FC_SENSOR_FORMAT: 	/* 0xF => 15 */
		_frame_nbus_internal = selected_slave->nbus_sensor_parameters(SENSOR_ADDRESS(rxFrame));
		break;
	default:
		send_reponse = 0;
	}

	if (send_reponse == 1){
		sendResponseToMaster(_frame_nbus_internal);
	}

}