but in binary of course
so all I am saying is maybe allow a mode like 00110
but it can be sparse
ah I see, bits
duh
yeah I see, much bigger
4 bits to desribe which pin in port, plus 1 for state
Here's an example of parsing a digital message in firmata.js: https://github.com/firmata/firmata.js/blob/master/lib/firmata.js#L124-L149
private Dictionary<int, bool> pinStates = new Dictionary<int, bool>();
private void Session_OnDigitalStateReceived(object sender, FirmataEventArgs<DigitalPortState> eventArgs)
{
var basePin = eventArgs.Value.Port * 8;
for (var portPin = 0; portPin < 8; portPin++)
{
var fullPin = basePin + portPin;
var isSet = eventArgs.Value.IsSet(portPin);
if (!pinStates.ContainsKey(fullPin))
{
pinStates.Add(fullPin, !isSet);
}
if (isSet == pinStates[fullPin]) continue;
pinStates[fullPin] = isSet;
Console.WriteLine($"Port {eventArgs.Value.Port}, Pin {portPin} (Pin #{fullPin}) changed to {isSet}");
}
}
I spose I may need to check if mode is pullup and stuff tho?
as from what I can tell, in pullup mode, unpressed is 1, but in normal mode, 0 is unpressed?
using Solid.Arduino;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Solid.Arduino.Firmata;
namespace FermataTest
{
public class Class1
{
private readonly ArduinoSession _session;
private readonly Dictionary<int, bool> _pinStates = new Dictionary<int, bool>();
private readonly Dictionary<int, PinMode> _pinModes = new Dictionary<int, PinMode>();
public Class1()
{
var connection = GetConnection();
_session = new ArduinoSession(connection);
SubscribeDigitalPin(2, PinMode.InputPullup);
SubscribeDigitalPin(3, PinMode.InputPullup);
SubscribeDigitalPin(4, PinMode.InputPullup);
SubscribeDigitalPin(5, PinMode.InputPullup);
SubscribeDigitalPin(6, PinMode.InputPullup);
SubscribeDigitalPin(7, PinMode.InputPullup);
SubscribeDigitalPin(8, PinMode.InputPullup);
SubscribeDigitalPin(9, PinMode.InputPullup);
SubscribeDigitalPin(10, PinMode.InputPullup);
SubscribeDigitalPin(11, PinMode.InputPullup);
SubscribeDigitalPin(12, PinMode.InputPullup);
SubscribeDigitalPin(13, PinMode.InputPullup);
_session.DigitalStateReceived += Session_OnDigitalStateReceived;
Console.ReadLine();
_session.Dispose();
connection.Dispose();
}
public void SubscribeDigitalPin(int pin, PinMode mode)
{
_session.SetDigitalPinMode(pin, mode);
_pinModes[pin] = mode;
var port = pin / 8;
_session.SetDigitalReportMode(port, true);
}
private void Session_OnDigitalStateReceived(object sender, FirmataEventArgs<DigitalPortState> eventArgs)
{
var basePin = eventArgs.Value.Port * 8;
for (var portPin = 0; portPin < 8; portPin++)
{
var fullPin = basePin + portPin;
if (!_pinModes.ContainsKey(fullPin))
{
continue;
}
var pinMode = _pinModes[fullPin];
var pressedValue = pinMode != PinMode.InputPullup;
var isSet = eventArgs.Value.IsSet(portPin) == pressedValue;
if (!_pinStates.ContainsKey(fullPin))
{
_pinStates.Add(fullPin, false);
}
if (isSet == _pinStates[fullPin]) continue;
_pinStates[fullPin] = isSet;
Console.WriteLine($"Port {eventArgs.Value.Port}, Pin {portPin} (Pin #{fullPin}) changed to {isSet}");
}
}
private static ISerialConnection GetConnection()
{
Console.WriteLine("Searching Arduino connection...");
var connection = EnhancedSerialConnection.Find();
Console.WriteLine(connection == null
? "No connection found. Make shure your Arduino board is attached to a USB port."
: $"Connected to port {connection.PortName} at {connection.BaudRate} baud.");
return connection;
}
}
}
Regarding pull-ups, that's correct. The value is 1 normally and 0 if pressed because the current is pulled up to VCC and when you press the button, it's pulled down to ground. You can find a thorough explanation here: https://learn.sparkfun.com/tutorials/pull-up-resistors.
I set pinb as input
When i read all six pin as it show me 0
It only work upto 31
Why??
Yet firmata apparently does not like that at all and will always reset when serial is disconnected :(
(not the hardware, but the cli python script)
how do I avoid that?
@elpollodiablo I am not sure if I understand your question or what you are trying to do. I do not know if this will solve your issue, but pymata4 which was released yesterday may solve your issue. If you set the "shutdown_on_exception" parameter to False, then a Firmata reset will not be sent to the Arduino unless you explicitly send the reset request. That being said, if you lose the serial link and do not shut down gracefully, then if you have analog input that is streaming data, it will continue to stream, and pymata4 will most likely issue an exception.