mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-11-30 03:26:13 +01:00
64 lines
2.7 KiB
C++
64 lines
2.7 KiB
C++
/*
|
|
* © 2021, Neil McKechnie. All rights reserved.
|
|
*
|
|
* This file is part of DCC++EX API
|
|
*
|
|
* This is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* It is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "DCC.h"
|
|
#include "IODevice.h"
|
|
#include "DIAG.h"
|
|
|
|
// Note: For DCC Accessory Decoders, a particular output can be specified by
|
|
// a linear address, or by an address/subaddress pair, where the subaddress is
|
|
// in the range 0 to 3 and specifies an output within a group of 4.
|
|
// NMRA and DCC++EX accepts addresses in the range 0-511. Linear addresses
|
|
// are not specified by the NMRA and so different manufacturers may calculate them
|
|
// in different ways. DCC+EX uses a range of 1-2044 which excludes decoder address 0.
|
|
// Therefore, I've avoided using linear addresses here because of the ambiguities
|
|
// involved. Instead I've used the term 'packedAddress'.
|
|
|
|
void DCCAccessoryDecoder::create(VPIN vpin, int nPins, int DCCAddress, int DCCSubaddress) {
|
|
new DCCAccessoryDecoder(vpin, nPins, DCCAddress, DCCSubaddress);
|
|
}
|
|
|
|
// Constructor
|
|
DCCAccessoryDecoder::DCCAccessoryDecoder(VPIN vpin, int nPins, int DCCAddress, int DCCSubaddress) {
|
|
_firstVpin = vpin;
|
|
_nPins = nPins;
|
|
_packedAddress = (DCCAddress << 2) + DCCSubaddress;
|
|
int endAddress = _packedAddress + _nPins - 1;
|
|
DIAG(F("DCC Accessory Decoder configured Vpins:%d-%d Linear Address:%d-%d (%d/%d-%d/%d)"), _firstVpin, _firstVpin+_nPins-1,
|
|
_packedAddress, _packedAddress+_nPins-1,
|
|
DCCAddress, DCCSubaddress, endAddress >> 2, endAddress % 4);
|
|
}
|
|
|
|
// Device-specific write function.
|
|
void DCCAccessoryDecoder::_write(VPIN id, int state) {
|
|
int packedAddress = _packedAddress + id - _firstVpin;
|
|
#ifdef DIAG_IO
|
|
DIAG(F("DCC Write Linear Address:%d State:%d"), packedAddress, state);
|
|
#endif
|
|
DCC::setAccessory(packedAddress >> 2, packedAddress % 4, state);
|
|
}
|
|
|
|
void DCCAccessoryDecoder::_display() {
|
|
int endAddress = _packedAddress + _nPins - 1;
|
|
DIAG(F("DCC Accessory Vpins:%d-%d Linear Address:%d-%d (%d/%d-%d/%d)"), _firstVpin, _firstVpin+_nPins-1,
|
|
_packedAddress, _packedAddress+_nPins-1,
|
|
_packedAddress >> 2, _packedAddress % 4, endAddress >> 2, endAddress % 4);
|
|
}
|
|
|