126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/*
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* © 2022, Colin Murdoch. All rights reserved.
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*
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* This file is part of CommandStation-EX
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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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* The IO_EXFastclock device driver is used to interface the standalone fast clock and receive time data.
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*
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* The EX-fastClock code lives in a separate repo (https://github.com/DCC-EX/EX-Fastclock) and contains the clock logic.
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*
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*
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*/
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#ifndef IO_EXFastclock_h
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#define IO_EXFastclock_h
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#include "IODevice.h"
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#include "I2CManager.h"
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#include "DIAG.h"
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#include "EXRAIL2.h"
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#include "CommandDistributor.h"
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bool FAST_CLOCK_EXISTS = true;
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class EXFastClock : public IODevice {
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public:
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// Constructor
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EXFastClock(I2CAddress i2cAddress){
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_I2CAddress = i2cAddress;
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addDevice(this);
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}
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static void create(I2CAddress i2cAddress) {
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DIAG(F("Checking for Clock"));
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// Start by assuming we will find the clock
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// Check if specified I2C address is responding (blocking operation)
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// Returns I2C_STATUS_OK (0) if OK, or error code.
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uint8_t _checkforclock = I2CManager.checkAddress(i2cAddress);
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DIAG(F("Clock check result - %d"), _checkforclock);
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// XXXX change thistosave2 bytes
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if (_checkforclock == 0) {
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FAST_CLOCK_EXISTS = true;
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//DIAG(F("I2C Fast Clock found at %s"), i2cAddress.toString());
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new EXFastClock(i2cAddress);
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}
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else {
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FAST_CLOCK_EXISTS = false;
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//DIAG(F("No Fast Clock found"));
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LCD(6,F("CLOCK NOT FOUND"));
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}
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}
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private:
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// Initialisation of Fastclock
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void _begin() override {
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if (FAST_CLOCK_EXISTS == true) {
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I2CManager.begin();
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if (I2CManager.exists(_I2CAddress)) {
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_deviceState = DEVSTATE_NORMAL;
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#ifdef DIAG_IO
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_display();
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#endif
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} else {
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_deviceState = DEVSTATE_FAILED;
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//LCD(6,F("CLOCK NOT FOUND"));
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DIAG(F("Fast Clock Not Found at address %s"), _I2CAddress.toString());
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}
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}
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}
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// Processing loop to obtain clock time
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void _loop(unsigned long currentMicros) override{
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if (FAST_CLOCK_EXISTS==true) {
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uint8_t readBuffer[3];
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byte a,b;
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#ifdef EXRAIL_ACTIVE
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I2CManager.read(_I2CAddress, readBuffer, 3);
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// XXXX change this to save a few bytes
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a = readBuffer[0];
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b = readBuffer[1];
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//_clocktime = (a << 8) + b;
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//_clockrate = readBuffer[2];
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CommandDistributor::setClockTime(((a << 8) + b), readBuffer[2], 1);
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//setClockTime(int16_t clocktime, int8_t clockrate, byte opt);
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// As the minimum clock increment is 2 seconds delay a bit - say 1 sec.
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// Clock interval is 60/ clockspeed i.e 60/b seconds
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delayUntil(currentMicros + ((60/b) * 1000000));
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#endif
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}
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}
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// Display EX-FastClock device driver info.
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void _display() override {
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DIAG(F("FastCLock on I2C:%s - %S"), _I2CAddress.toString(), (_deviceState==DEVSTATE_FAILED) ? F("OFFLINE") : F(""));
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}
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};
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#endif
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