Update files

Core/UniversalAsynchronousReceiverTransmitter.cpp

@@ -0,0 +1,100 @@
+#include <uart.hpp>
+
+#include <vector.hpp>
+#include <debug.h>
+#include <io.h>
+
+volatile bool serialports[8] = {false, false, false, false, false, false, false, false};
+Vector<UniversalAsynchronousReceiverTransmitter::Events *> RegisteredEvents;
+
+namespace UniversalAsynchronousReceiverTransmitter
+{
+#define SERIAL_ENABLE_DLAB 0x80
+#define SERIAL_RATE_38400_LO 0x03
+#define SERIAL_RATE_38400_HI 0x00
+#define SERIAL_BUFFER_EMPTY 0x20
+
+    UART::UART(SerialPorts Port)
+    {
+#if defined(__amd64__) || defined(__i386__)
+        if (Port == COMNULL)
+            return;
+
+        this->Port = Port;
+
+        if (serialports[Port])
+            return;
+
+        // Initialize the serial port
+        outb(Port + 1, 0x00);                 // Disable all interrupts
+        outb(Port + 3, SERIAL_ENABLE_DLAB);   // Enable DLAB (set baud rate divisor)
+        outb(Port + 0, SERIAL_RATE_38400_LO); // Set divisor to 3 (lo byte) 38400 baud
+        outb(Port + 1, SERIAL_RATE_38400_HI); //                  (hi byte)
+        outb(Port + 3, 0x03);                 // 8 bits, no parity, one stop bit
+        outb(Port + 2, 0xC7);                 // Enable FIFO, clear them, with 14-byte threshold
+        outb(Port + 4, 0x0B);                 // IRQs enabled, RTS/DSR set
+
+        // Check if the serial port is faulty.
+        if (inb(Port + 0) != 0xAE)
+        {
+            static int once = 0;
+            if (!once++)
+                warn("Serial port %#lx is faulty.", Port);
+            // serialports[Port] = false; // ignore for now
+            // return;
+        }
+
+        // Set to normal operation mode.
+        outb(Port + 4, 0x0F);
+        serialports[Port] = true;
+#endif
+    }
+
+    UART::~UART() {}
+
+    void UART::Write(uint8_t Char)
+    {
+#if defined(__amd64__) || defined(__i386__)
+        while ((inb(Port + 5) & SERIAL_BUFFER_EMPTY) == 0)
+            ;
+        outb(Port, Char);
+#endif
+        foreach (auto e in RegisteredEvents)
+            if (e->GetRegisteredPort() == Port || e->GetRegisteredPort() == COMNULL)
+                e->OnSent(Char);
+    }
+
+    uint8_t UART::Read()
+    {
+#if defined(__amd64__) || defined(__i386__)
+        while ((inb(Port + 5) & 1) == 0)
+            ;
+        return inb(Port);
+#endif
+        foreach (auto e in RegisteredEvents)
+        {
+            if (e->GetRegisteredPort() == Port || e->GetRegisteredPort() == COMNULL)
+            {
+#if defined(__amd64__) || defined(__i386__)
+                e->OnReceived(inb(Port));
+#endif
+            }
+        }
+    }
+
+    Events::Events(SerialPorts Port)
+    {
+        this->Port = Port;
+        RegisteredEvents.push_back(this);
+    }
+
+    Events::~Events()
+    {
+        for (uint64_t i = 0; i < RegisteredEvents.size(); i++)
+            if (RegisteredEvents[i] == this)
+            {
+                RegisteredEvents.remove(i);
+                return;
+            }
+    }
+}