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Added timer support to the PCx86 SerialPort component, so that we can honor the programmed baud rate now

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Jeff Parsons 2017-08-23 10:49:35 -07:00 • committed by Jeff Parsons
commit 157319a355
9 changed files with 754 additions and 669 deletions
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18
modules/pc8080/lib/serial.js
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@ -330,10 +330,10 @@ class SerialPort8080 extends Component {
this.dbg = dbg;
var serial = this;
this.timerReceiveNext = this.cpu.addTimer(function() {
this.timerReceiveNext = this.cpu.addTimer(this.id + ".receive", function() {
serial.receiveData();
});
this.timerTransmitNext = this.cpu.addTimer(function() {
this.timerTransmitNext = this.cpu.addTimer(this.id + ".transmit", function() {
serial.transmitData();
});
@ -540,8 +540,8 @@ class SerialPort8080 extends Component {
var nBits = ((this.bMode & SerialPort8080.UART8251.MODE.DATA_BITS) >> 2) + 6; // includes an extra +1 for start bit
if (this.bMode & SerialPort8080.UART8251.MODE.PARITY_ENABLE) nBits++;
nBits += ((((this.bMode & SerialPort8080.UART8251.MODE.STOP_BITS) >> 6) + 1) >> 1);
var nBytesPerSecond = Math.round(nBaud / nBits);
return 1000 / nBytesPerSecond;
var nBytesPerSecond = nBaud / nBits;
return (1000 / nBytesPerSecond)|0;
}
/**
@ -637,10 +637,8 @@ class SerialPort8080 extends Component {
}
}
if (this.sendData) {
if (this.sendData.call(this.connection, b)) {
fTransmitted = true;
}
if (this.sendData && this.sendData.call(this.connection, b)) {
fTransmitted = true;
}
if (this.echoByte(b)) {
@ -658,6 +656,10 @@ class SerialPort8080 extends Component {
* When timerTransmitNext fires, we have honored the programmed XMIT_RATE period, so we can
* set XMIT_READY (and XMIT_EMPTY), which signals the firmware that another byte can be transmitted.
*
* The sData parameter is not used when we're called via the timer; it's an optional parameter used by
* the Keyboard component to deliver data pasted via the clipboard, and is currently only useful when
* the SerialPort is connected to another machine. TODO: Define a separate interface for that feature.
*
* @this {SerialPort8080}
* @param {string} [sData]
* @return {boolean} true if successful, false if not