mirror of
https://github.com/DCC-EX/CommandStation-EX.git
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230 lines
9.0 KiB
C++
230 lines
9.0 KiB
C++
/*
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* © 2021 Neil McKechnie
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* © 2021 Harald Barth
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* © 2020-2021 Fred Decker
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* © 2020-2021 Chris Harlow
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* All rights reserved.
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*
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* This file is part of Asbelos DCC 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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DCC++ BASE STATION supports optional OUTPUT control of any unused Arduino Pins for custom purposes.
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Pins can be activited or de-activated. The default is to set ACTIVE pins HIGH and INACTIVE pins LOW.
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However, this default behavior can be inverted for any pin in which case ACTIVE=LOW and INACTIVE=HIGH.
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Definitions and state (ACTIVE/INACTIVE) for pins are retained in EEPROM and restored on power-up.
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The default is to set each defined pin to active or inactive according to its restored state.
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However, the default behavior can be modified so that any pin can be forced to be either active or inactive
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upon power-up regardless of its previous state before power-down.
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To have this sketch utilize one or more Arduino pins as custom outputs, first define/edit/delete
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output definitions using the following variation of the "Z" command:
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<Z ID PIN IFLAG>: creates a new output ID, with specified PIN and IFLAG values.
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if output ID already exists, it is updated with specificed PIN and IFLAG.
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note: output state will be immediately set to ACTIVE/INACTIVE and pin will be set to HIGH/LOW
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according to IFLAG value specifcied (see below).
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returns: <O> if successful and <X> if unsuccessful (e.g. out of memory)
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<Z ID>: deletes definition of output ID
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returns: <O> if successful and <X> if unsuccessful (e.g. ID does not exist)
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<Z>: lists all defined output pins
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returns: <Y ID PIN IFLAG STATE> for each defined output pin or <X> if no output pins defined
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where
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ID: the numeric ID (0-32767) of the output
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PIN: the arduino pin number to use for the output
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STATE: the state of the output (0=INACTIVE / 1=ACTIVE)
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IFLAG: defines the operational behavior of the output based on bits 0, 1, and 2 as follows:
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IFLAG, bit 0: 0 = forward operation (ACTIVE=HIGH / INACTIVE=LOW)
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1 = inverted operation (ACTIVE=LOW / INACTIVE=HIGH)
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IFLAG, bit 1: 0 = state of pin restored on power-up to either ACTIVE or INACTIVE depending
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on state before power-down; state of pin set to INACTIVE when first created
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1 = state of pin set on power-up, or when first created, to either ACTIVE of INACTIVE
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depending on IFLAG, bit 2
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IFLAG, bit 2: 0 = state of pin set to INACTIVE uponm power-up or when first created
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1 = state of pin set to ACTIVE uponm power-up or when first created
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Once all outputs have been properly defined, use the <E> command to store their definitions to EEPROM.
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If you later make edits/additions/deletions to the output definitions, you must invoke the <E> command if you want those
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new definitions updated in the EEPROM. You can also clear everything stored in the EEPROM by invoking the <e> command.
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To change the state of outputs that have been defined use:
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<Z ID STATE>: sets output ID to either ACTIVE or INACTIVE state
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returns: <Y ID STATE>, or <X> if turnout ID does not exist
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where
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ID: the numeric ID (0-32767) of the turnout to control
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STATE: the state of the output (0=INACTIVE / 1=ACTIVE)
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When controlled as such, the Arduino updates and stores the direction of each output in EEPROM so
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that it is retained even without power. A list of the current states of each output in the form <Y ID STATE> is generated
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by this sketch whenever the <s> status command is invoked. This provides an efficient way of initializing
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the state of any outputs being monitored or controlled by a separate interface or GUI program.
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**********************************************************************/
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#include "Outputs.h"
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#ifndef DISABLE_EEPROM
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#include "EEStore.h"
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#endif
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#include "StringFormatter.h"
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#include "IODevice.h"
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///////////////////////////////////////////////////////////////////////////////
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// Static function to print all output states to stream in the form "<Y id state>"
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void Output::printAll(Print *stream){
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for (Output *tt = Output::firstOutput; tt != NULL; tt = tt->nextOutput)
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StringFormatter::send(stream, F("<Y %d %d>\n"), tt->data.id, tt->data.active);
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} // Output::printAll
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///////////////////////////////////////////////////////////////////////////////
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// Object method to activate / deactivate the Output state.
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void Output::activate(uint16_t s){
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s = (s>0); // Make 0 or 1
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data.active = s; // if s>0, set status to active, else inactive
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// set state of output pin to HIGH or LOW depending on whether bit zero of iFlag is set to 0 (ACTIVE=HIGH) or 1 (ACTIVE=LOW)
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IODevice::write(data.pin, s ^ data.invert);
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#ifndef DISABLE_EEPROM
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// Update EEPROM if output has been stored.
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if(EEStore::eeStore->data.nOutputs > 0 && num > 0)
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EEPROM.put(num, data.oStatus);
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#endif
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static function to locate Output object specified by ID 'n'.
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// Return NULL if not found.
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Output* Output::get(uint16_t n){
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Output *tt;
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for(tt=firstOutput;tt!=NULL && tt->data.id!=n;tt=tt->nextOutput);
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return(tt);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static function to delete Output object specified by ID 'n'.
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// Return false if not found.
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bool Output::remove(uint16_t n){
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Output *tt,*pp=NULL;
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for(tt=firstOutput;tt!=NULL && tt->data.id!=n;pp=tt,tt=tt->nextOutput);
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if(tt==NULL) return false;
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if(tt==firstOutput)
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firstOutput=tt->nextOutput;
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else
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pp->nextOutput=tt->nextOutput;
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free(tt);
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return true;
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static function to load configuration and state of all Outputs from EEPROM
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#ifndef DISABLE_EEPROM
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void Output::load(){
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struct OutputData data;
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Output *tt;
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for(uint16_t i=0;i<EEStore::eeStore->data.nOutputs;i++){
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EEPROM.get(EEStore::pointer(),data);
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// Create new object, set current state to default or to saved state from eeprom.
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tt=create(data.id, data.pin, data.flags);
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uint8_t state = data.setDefault ? data.defaultValue : data.active;
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tt->activate(state);
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if (tt) tt->num=EEStore::pointer() + offsetof(OutputData, oStatus); // Save pointer to flags within EEPROM
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EEStore::advance(sizeof(tt->data));
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Static function to store configuration and state of all Outputs to EEPROM
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void Output::store(){
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Output *tt;
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tt=firstOutput;
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EEStore::eeStore->data.nOutputs=0;
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while(tt!=NULL){
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EEPROM.put(EEStore::pointer(),tt->data);
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tt->num=EEStore::pointer() + offsetof(OutputData, oStatus); // Save pointer to flags within EEPROM
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EEStore::advance(sizeof(tt->data));
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tt=tt->nextOutput;
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EEStore::eeStore->data.nOutputs++;
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}
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// Static function to create an Output object
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// The obscurely named parameter 'v' is 0 if called from the load() function
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// and 1 if called from the <Z> command processing.
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Output *Output::create(uint16_t id, VPIN pin, int iFlag, int v){
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Output *tt;
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if (pin > VPIN_MAX) return NULL;
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if(firstOutput==NULL){
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firstOutput=(Output *)calloc(1,sizeof(Output));
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tt=firstOutput;
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} else if((tt=get(id))==NULL){
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tt=firstOutput;
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while(tt->nextOutput!=NULL)
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tt=tt->nextOutput;
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tt->nextOutput=(Output *)calloc(1,sizeof(Output));
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tt=tt->nextOutput;
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}
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if(tt==NULL) return tt;
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tt->num = 0; // make sure new object doesn't get written to EEPROM until store() command
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tt->data.id=id;
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tt->data.pin=pin;
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tt->data.flags=iFlag;
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if(v==1){
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// sets status to 0 (INACTIVE) is bit 1 of iFlag=0, otherwise set to value of bit 2 of iFlag
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if (tt->data.setDefault)
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tt->data.active = tt->data.defaultValue;
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else
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tt->data.active = 0;
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}
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IODevice::write(tt->data.pin, tt->data.active ^ tt->data.invert);
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return(tt);
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}
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///////////////////////////////////////////////////////////////////////////////
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Output *Output::firstOutput=NULL;
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