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https://github.com/DCC-EX/CommandStation-EX.git
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3aa5cbcdfc
commitec4c6b9c02Author: Asbelos <asbelos@btinternet.com> Date: Wed Mar 5 00:30:13 2025 +0000 Cleanup to new structure commit620ad6275bAuthor: Asbelos <asbelos@btinternet.com> Date: Fri Feb 28 01:16:03 2025 +0000 Railcom3
121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
/*
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* © 2024, Henk Kruisbrink & Chris Harlow. All rights reserved.
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* © 2023, Neil McKechnie. All rights reserved.
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*
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* This file is part of DCC++EX API
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* It is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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*
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* Dec 2023, Added NXP SC16IS752 I2C Dual UART
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* The SC16IS752 has 64 bytes TX & RX FIFO buffer
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* First version without interrupts from I2C UART and only RX/TX are used, interrupts may not be
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* needed as the RX Fifo holds the reply
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*
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* Jan 2024, Issue with using both UARTs simultaniously, the secod uart seems to work but the first transmit
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* corrupt data. This need more analysis and experimenatation.
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* Will push this driver to the dev branch with the uart fixed to 0
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* Both SC16IS750 (single uart) and SC16IS752 (dual uart, but only uart 0 is enable)
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*
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* myHall.cpp configuration syntax:
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*
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* I2CRailcom::create(1st vPin, vPins, I2C address);
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*
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* myAutomation configuration
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* HAL(I2CRailcom, 1st vPin, vPins, I2C address)
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* Parameters:
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* 1st vPin : First virtual pin that EX-Rail can control to play a sound, use PLAYSOUND command (alias of ANOUT)
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* vPins : Total number of virtual pins allocated (to prevent overlaps)
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* I2C Address : I2C address of the serial controller, in 0x format
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*/
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#include "IODevice.h"
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#include "IO_I2CRailcom.h"
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#include "I2CManager.h"
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#include "DIAG.h"
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#include "DCC.h"
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#include "DCCWaveform.h"
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#include "Railcom.h"
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I2CRailcom::I2CRailcom(VPIN firstVpin, int nPins, I2CAddress i2cAddress){
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_firstVpin = firstVpin;
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_nPins = nPins;
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_I2CAddress = i2cAddress;
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addDevice(this);
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}
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void I2CRailcom::create(VPIN firstVpin, int nPins, I2CAddress i2cAddress) {
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if (checkNoOverlap(firstVpin, nPins, i2cAddress))
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new I2CRailcom(firstVpin,nPins,i2cAddress);
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}
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void I2CRailcom::_begin() {
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I2CManager.setClock(1000000); // TODO do we need this?
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I2CManager.begin();
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auto exists=I2CManager.exists(_I2CAddress);
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DIAG(F("I2CRailcom: %s RailcomCollector %S detected"),
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_I2CAddress.toString(), exists?F(""):F(" NOT"));
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if (!exists) return;
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_deviceState=DEVSTATE_NORMAL;
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_display();
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}
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void I2CRailcom::_loop(unsigned long currentMicros) {
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// Read responses from device
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if (_deviceState!=DEVSTATE_NORMAL) return;
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// have we read this cutout already?
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// basically we only poll once per packet when railcom cutout is working
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auto cut=DCCWaveform::getRailcomCutoutCounter();
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if (cutoutCounter==cut) return;
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cutoutCounter=cut;
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Railcom::loop(); // in case a csv read has timed out
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// Obtain data length from the collector
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byte inbuf[1];
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byte queryLength[]={'?'};
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auto state=I2CManager.read(_I2CAddress, inbuf, 1,queryLength,sizeof(queryLength));
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if (state) {
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DIAG(F("RC ? state=%d"),state);
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return;
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}
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auto length=inbuf[0];
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if (length==0) return; // nothing to report
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// Build a buffer and import the data from the collector
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byte inbuf2[length];
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byte queryData[]={'>'};
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state=I2CManager.read(_I2CAddress, inbuf2, length,queryData,sizeof(queryData));
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if (state) {
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DIAG(F("RC > %d state=%d"),length,state);
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return;
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}
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// process incoming data buffer
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Railcom::process(_firstVpin,inbuf2,length);
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}
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void I2CRailcom::_display() {
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DIAG(F("I2CRailcom: %s blocks %d-%d %S"), _I2CAddress.toString(), _firstVpin, _firstVpin+_nPins-1,
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(_deviceState!=DEVSTATE_NORMAL) ? F("OFFLINE") : F(""));
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}
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