mirror of
https://github.com/DCC-EX/CommandStation-EX.git
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99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/*
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* © 2023, Chris Harlow. All rights reserved.
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* © 2021, 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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#ifndef io_trainbrains_h
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#define io_trainbrains_h
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#include "IO_GPIOBase.h"
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#include "FSH.h"
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/////////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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* IODevice subclass for trainbrains 3-block occupancy detector.
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* For details see http://trainbrains.eu
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*/
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enum TrackUnoccupancy
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{
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TRACK_UNOCCUPANCY_UNKNOWN = 0,
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TRACK_OCCUPIED = 1,
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TRACK_UNOCCUPIED = 2
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};
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class Trainbrains02 : public GPIOBase<uint16_t> {
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public:
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static void create(VPIN vpin, uint8_t nPins, I2CAddress i2cAddress) {
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if (checkNoOverlap(vpin, nPins, i2cAddress)) new Trainbrains02(vpin, nPins, i2cAddress);
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}
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private:
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// Constructor
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Trainbrains02(VPIN vpin, uint8_t nPins, I2CAddress i2cAddress, int interruptPin=-1)
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: GPIOBase<uint16_t>((FSH *)F("Trainbrains02"), vpin, nPins, i2cAddress, interruptPin)
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{
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requestBlock.setRequestParams(_I2CAddress, inputBuffer, sizeof(inputBuffer),
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outputBuffer, sizeof(outputBuffer));
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outputBuffer[0] = (uint8_t)_I2CAddress; // strips away the mux part.
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outputBuffer[1] =14;
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outputBuffer[2] =1;
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outputBuffer[3] =0; // This is the channel updated at each poling call
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outputBuffer[4] =0;
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outputBuffer[5] =0;
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outputBuffer[6] =0;
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outputBuffer[7] =0;
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outputBuffer[8] =0;
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outputBuffer[9] =0;
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}
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void _writeGpioPort() override {}
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void _readGpioPort(bool immediate) override {
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// cycle channel on device each time
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outputBuffer[3]=channelInProgress+1; // 1-origin
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channelInProgress++;
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if(channelInProgress>=_nPins) channelInProgress=0;
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if (immediate) {
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_processCompletion(I2CManager.read(_I2CAddress, inputBuffer, sizeof(inputBuffer),
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outputBuffer, sizeof(outputBuffer)));
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} else {
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// Queue new request
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requestBlock.wait(); // Wait for preceding operation to complete
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// Issue new request to read GPIO register
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I2CManager.queueRequest(&requestBlock);
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}
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}
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// This function is invoked when an I/O operation on the requestBlock completes.
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void _processCompletion(uint8_t status) override {
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if (status != I2C_STATUS_OK) inputBuffer[6]=TRACK_UNOCCUPANCY_UNKNOWN;
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if (inputBuffer[6] == TRACK_UNOCCUPIED ) _portInputState |= 0x01 <<channelInProgress;
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else _portInputState &= ~(0x01 <<channelInProgress);
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}
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uint8_t channelInProgress=0;
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uint8_t outputBuffer[10];
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uint8_t inputBuffer[10];
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};
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#endif
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