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Add source code of the XiPC emulator

Pawel Jablonski authored on 17/03/2023 16:46:08
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emu/src/rs232.cpp
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+/*
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+ * Author: Pawel Jablonski
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+ * E-mail: pj@xirx.net
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+ * WWW: xirx.net
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+ * GIT: git.xirx.net
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+ *
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+ * License: You can use this code however you like
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+ * but leave information about the original author.
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+ * Code is free for non-commercial and commercial use.
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+ */
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+
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+#include "rs232.h"
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+
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+/**
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+ * Constructor for the RS232 class
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+ *
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+ * @param parent Parent object
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+ */
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+RS232::RS232(QObject *parent) : QObject(parent)
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+{
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+	this->reset();
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+}
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+
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+//! Reset the RS232 buffers
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+void RS232::reset()
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+{
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+	this->rxBuffer.clear();
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+}
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+
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+/**
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+ * Receive function used to emulate input
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+ *
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+ * @param text Received text
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+ */
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+void RS232::rx(const QString &text)
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+{
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+	unsigned int charAdded = 0;
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+
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+	for(const QChar &cFor : text)
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+	{
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+		unsigned char c = static_cast<unsigned char>(cFor.toLatin1());
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+
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+		if((c >= MIN_CODE) && (c <= MAX_CODE))
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+		{
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+			this->rxBuffer.append(c);
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+
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+			charAdded++;
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+
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+			emit updateRxSignal(c);
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+		}
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+	}
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+
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+	if(charAdded > 0)
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+	{
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+		this->rxBuffer.append(0x00);
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+
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+		emit updateRxSignal(0x00);
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+	}
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+
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+	if(this->rxBuffer.length() > 0)
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+	{
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+		emit dataReadySignal(true);
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+	}
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+}
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+
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+/**
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+ * Send char
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+ *
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+ * @param c Char to send
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+ */
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+void RS232::send(unsigned char c)
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+{
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+	emit updateTxSignal(c & SEND_MASK);
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+}
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+
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+/**
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+ * Read next a char from receive buffer
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+ *
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+ * @return Next char from the receive buffer
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+ */
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+unsigned char RS232::receive()
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+{
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+	if(this->rxBuffer.length() > 0)
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+	{
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+		return(this->rxBuffer.takeFirst());
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+	}
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+
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+	emit dataReadySignal(false);
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+
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+	return(0);
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+}
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+
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+/**
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+ * Get free space size in the transmit buffer
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+ *
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+ * @return Free space size in the transmit buffer
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+ */
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+unsigned char RS232::getSendBufferFree()
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+{
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+	return(BUFFER_TX_SIZE);
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+}