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#include <io.h>
#include <serial.h>
void init_serial()
{
outb(PORT + 1, 0x00); // Disable all interrupts
outb(PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
outb(PORT + 0, 0x03); // Set divisor to 3 (lo byte) 38400 baud
outb(PORT + 1, 0x00); // (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
}
uint8_t serial_received()
{
return inb(PORT + 5) & 1;
}
char read_serial()
{
while (serial_received() == 0);
return (char)inb(PORT);
}
uint8_t is_transmit_empty()
{
return inb(PORT + 5) & 0x20;
}
void write_serial(char c)
{
while (is_transmit_empty() == 0);
outb(PORT, (uint8_t)c);
}
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