#include <cpu/ports.h>

Macros
#define	DATA_PORT(com) (data_ports[com])
	Returns the data port of a serial port.

#define	INT_PORT(com) (DATA_PORT(com)+1)
	Returns the interrupt config port of a serial port.

#define	FIFO_PORT(com) (DATA_PORT(com)+2)
	Returns the fifo config port of a serial port.

#define	LINE_CMD_PORT(com) (DATA_PORT(com)+3)
	Returns the line cmd port of a serial port.

#define	MODEM_CMD_PORT(com) (DATA_PORT(com)+4)
	Returns the modem cmd port of a serial port.

#define	LINE_STAT_PORT(com) (DATA_PORT(com)+5)
	Returns the line status port of a serial port.

#define	SCRATCH_PORT(com) (DATA_PORT(com)+7)
	Returns the scratch port of a serial port.

#define	IS_TRANSMIT_FIFO_EMPTY(com) (port_byte_in(LINE_STAT_PORT(com))&0x20)
	Returns whether the trasmit FIFO is empty.

Variables
static char	configured [] ={0,0,0,0}
	What serial ports have been detected and configured.

static int	data_ports [4] ={0x3f8,0x2f8,0x3e8,0x2e8}
	List of the data ports for all the potential serial ports.

Function Documentation

◆ configure()

static

Configure a serial port with a specified baud rate.

Parameters

com	The number of the serial port to configure
rate	The baud rate to set the serial port to.

void serial_init ( )

Initialize the serial driver

void serial_putc ( char c )

Write a character to the serial port

Parameters

c	The character to write