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|
SerialPort
{
classvar <>devicePattern, allPorts;
var dataptr, semaphore;
var <>doneAction;
*initClass {
allPorts = Array[];
ShutDown.add {
this.cleanupAll;
};
}
// device listing
*devices {
^(devicePattern ?? {
thisProcess.platform.name.switch(
\linux, "/dev/tty[A,S,U]*",
\osx, "/dev/tty.*",
\windows, "COM"
)
}).pathMatch
}
*listDevices {
this.devices.do(_.postln);
}
*new {
| port,
baudrate(9600),
databits(8),
stopbit(true),
parity(nil),
crtscts(false),
xonxoff(false)
exclusive(false) |
if (port.isNumber) {
port = this.devices[port] ?? {
Error("invalid port index").throw;
};
}
^super.new.initSerialPort(
port,
exclusive,
baudrate,
databits,
stopbit,
( even: 1, odd: 2 ).at(parity) ? 0,
crtscts,
xonxoff
)
}
initSerialPort { | ... args |
semaphore = Semaphore(0);
if ( dataptr.isNil ){
this.prOpen(*args);
allPorts = allPorts.add(this);
doneAction = { ("SerialPort"+args[0]+"was closed").postln; };
}
}
isOpen {
^dataptr.notNil
}
close {
if (this.isOpen) {
this.prClose;
allPorts.remove(this);
}
}
*closeAll {
var ports = allPorts;
allPorts = Array[];
ports.do(_.close);
}
*cleanupAll {
var ports = allPorts;
allPorts = Array[];
ports.do(_.primCleanup);
}
// non-blocking read
next {
_SerialPort_Next
^this.primitiveFailed
}
// blocking read
read {
var byte;
while { (byte = this.next).isNil } {
semaphore.wait;
};
^byte
}
// rx errors since last query
rxErrors {
_SerialPort_RXErrors
}
// always blocks
put { | byte, timeout=0.005 |
if ( dataptr.notNil ){
while { this.prPut(byte).not } {
timeout.wait;
timeout = timeout * 2;
}
}{
"SerialPort not open".warn;
}
}
putAll { | bytes, timeout=0.005 |
bytes.do { |byte|
this.put(byte, timeout);
}
}
// PRIMITIVE
prOpen { | ... args | // was: | port, baudRate | but that misses out on all the other args?
_SerialPort_Open
^this.primitiveFailed
}
prClose {
_SerialPort_Close
^this.primitiveFailed
}
primCleanup {
_SerialPort_Cleanup
^this.primitiveFailed
}
prCleanup{
if (this.isOpen) {
this.primCleanup;
allPorts.remove(this);
}
}
prPut { | byte |
_SerialPort_Put
^this.primitiveFailed
}
prDataAvailable {
// callback
semaphore.signal;
}
prDoneAction {
// callback
this.doneAction.value;
// cleanup the port
this.prCleanup
}
}
|
