mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-24 05:11:24 +01:00
130 lines
4.1 KiB
C++
130 lines
4.1 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 <Arduino.h>
|
|
#include "IO_ExampleSerial.h"
|
|
#include "FSH.h"
|
|
|
|
// Constructor
|
|
IO_ExampleSerial::IO_ExampleSerial(VPIN firstVpin, int nPins, HardwareSerial *serial, unsigned long baud) {
|
|
_firstVpin = firstVpin;
|
|
_nPins = nPins;
|
|
_pinValues = (uint16_t *)calloc(_nPins, sizeof(uint16_t));
|
|
_baud = baud;
|
|
|
|
// Save reference to serial port driver
|
|
_serial = serial;
|
|
|
|
addDevice(this);
|
|
}
|
|
|
|
// Static create method for one module.
|
|
void IO_ExampleSerial::create(VPIN firstVpin, int nPins, HardwareSerial *serial, unsigned long baud) {
|
|
new IO_ExampleSerial(firstVpin, nPins, serial, baud);
|
|
}
|
|
|
|
// Device-specific initialisation
|
|
void IO_ExampleSerial::_begin() {
|
|
_serial->begin(_baud);
|
|
#if defined(DIAG_IO)
|
|
_display();
|
|
#endif
|
|
|
|
// Send a few # characters to the output
|
|
for (uint8_t i=0; i<3; i++)
|
|
_serial->write('#');
|
|
}
|
|
|
|
// Device-specific write function. Write a string in the form "#Wm,n#"
|
|
// where m is the vpin number, and n is the value.
|
|
void IO_ExampleSerial::_write(VPIN vpin, int value) {
|
|
int pin = vpin -_firstVpin;
|
|
#ifdef DIAG_IO
|
|
DIAG(F("IO_ExampleSerial::_write Pin:%d Value:%d"), (int)vpin, value);
|
|
#endif
|
|
// Send a command string over the serial line
|
|
_serial->print('#');
|
|
_serial->print('W');
|
|
_serial->print(pin);
|
|
_serial->print(',');
|
|
_serial->print(value);
|
|
_serial->println('#');
|
|
DIAG(F("ExampleSerial Sent command, p1=%d, p2=%d"), vpin, value);
|
|
}
|
|
|
|
// Device-specific read function.
|
|
int IO_ExampleSerial::_read(VPIN vpin) {
|
|
|
|
// Return a value for the specified vpin.
|
|
int result = _pinValues[vpin-_firstVpin];
|
|
|
|
return result;
|
|
}
|
|
|
|
// Loop function to do background scanning of the input port. State
|
|
// machine parses the incoming command as it is received. Command
|
|
// is in the form "#Nm,n#" where m is the index and n is the value.
|
|
void IO_ExampleSerial::_loop(unsigned long currentMicros) {
|
|
(void)currentMicros; // Suppress compiler warnings
|
|
if (_serial->available()) {
|
|
// Input data available to read. Read a character.
|
|
char c = _serial->read();
|
|
switch (_inputState) {
|
|
case 0: // Waiting for start of command
|
|
if (c == '#') // Start of command received.
|
|
_inputState = 1;
|
|
break;
|
|
case 1: // Expecting command character
|
|
if (c == 'N') { // 'Notify' character received
|
|
_inputState = 2;
|
|
_inputValue = _inputIndex = 0;
|
|
} else
|
|
_inputState = 0; // Unexpected char, reset
|
|
break;
|
|
case 2: // reading first parameter (index)
|
|
if (isdigit(c))
|
|
_inputIndex = _inputIndex * 10 + (c-'0');
|
|
else if (c==',')
|
|
_inputState = 3;
|
|
else
|
|
_inputState = 0; // Unexpected char, reset
|
|
break;
|
|
case 3: // reading reading second parameter (value)
|
|
if (isdigit(c))
|
|
_inputValue = _inputValue * 10 - (c-'0');
|
|
else if (c=='#') { // End of command
|
|
// Complete command received, do something with it.
|
|
DIAG(F("ExampleSerial Received command, p1=%d, p2=%d"), _inputIndex, _inputValue);
|
|
if (_inputIndex < _nPins) { // Store value
|
|
_pinValues[_inputIndex] = _inputValue;
|
|
}
|
|
_inputState = 0; // Done, start again.
|
|
} else
|
|
_inputState = 0; // Unexpected char, reset
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void IO_ExampleSerial::_display() {
|
|
DIAG(F("IO_ExampleSerial Configured on VPins:%d-%d"), (int)_firstVpin,
|
|
(int)_firstVpin+_nPins-1);
|
|
}
|
|
|