#include <stdint.h>

Enumerations
enum	com_port_t { COM1 = 0x3F8 , COM2 = 0x2F8 , COM3 = 0x3E8 , COM4 = 0x2E8 , COM5 = 0x5F8 , COM6 = 0x4F8 , COM7 = 0x5E8 , COM8 = 0x48E }

enum	com_reg_t { COM_REG_RECEIVE = 0 , COM_REG_TRANSMIT = 0 , COM_REG_INTERRUPT_ENABLE = 1 , COM_REG_BAUD_LOW = 0 , COM_REG_BAUD_HIGH = 1 , COM_REG_INTERRUPT_ID = 2 , COM_REG_FIFO_CONTROL = 2 , COM_REG_LINE_CONTROL = 3 , COM_REG_MODEM_CONTROL = 4 , COM_REG_LINE_STATUS = 5 , COM_REG_MODEM_STATUS = 6 , COM_REG_SCRATCH = 7 }

enum	com_line_control_t { COM_LINE_SIZE_5 = 0 , COM_LINE_SIZE_6 = 1 , COM_LINE_SIZE_7 = 2 , COM_LINE_SIZE_8 = 3 , COM_LINE_DLAB = 1 << 7 }

enum	com_modem_control_t { COM_MODEM_DTR = 1 << 0 , COM_MODEM_RTS = 1 << 1 , COM_MODEM_OUT1 = 1 << 2 , COM_MODEM_OUT2 = 1 << 3 , COM_MODEM_LOOP = 1 << 4 }

enum	com_line_status_t { COM_LINE_READ_READY = 1 << 0 , COM_LINE_WRITE_READY = 1 << 5 }

Functions
void	com_init (com_port_t port)

uint8_t	com_read (com_port_t port)

void	com_write (com_port_t port, uint8_t value)

uint8_t	com_reg_read (com_port_t port, com_reg_t reg)

void	com_reg_write (com_port_t port, com_reg_t reg, uint8_t value)

Enumeration Type Documentation

◆ com_line_control_t

enum com_line_control_t

Enumerator
COM_LINE_SIZE_5
COM_LINE_SIZE_6
COM_LINE_SIZE_7
COM_LINE_SIZE_8
COM_LINE_DLAB

Definition at line 33 of file com.h.

◆ com_line_status_t

enum com_line_status_t

Enumerator
COM_LINE_READ_READY
COM_LINE_WRITE_READY

Definition at line 51 of file com.h.

◆ com_modem_control_t

enum com_modem_control_t

Enumerator
COM_MODEM_DTR
COM_MODEM_RTS
COM_MODEM_OUT1
COM_MODEM_OUT2
COM_MODEM_LOOP

Definition at line 42 of file com.h.

◆ com_port_t

enum com_port_t

Enumerator
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8

Definition at line 5 of file com.h.

◆ com_reg_t

enum com_reg_t

Enumerator
COM_REG_RECEIVE
COM_REG_TRANSMIT
COM_REG_INTERRUPT_ENABLE
COM_REG_BAUD_LOW
COM_REG_BAUD_HIGH
COM_REG_INTERRUPT_ID
COM_REG_FIFO_CONTROL
COM_REG_LINE_CONTROL
COM_REG_MODEM_CONTROL
COM_REG_LINE_STATUS
COM_REG_MODEM_STATUS
COM_REG_SCRATCH

Definition at line 17 of file com.h.

Function Documentation

◆ com_init()

void com_init ( com_port_t port )

Definition at line 4 of file com.c.

References COM_LINE_DLAB, COM_LINE_SIZE_8, COM_MODEM_DTR, COM_MODEM_OUT2, COM_MODEM_RTS, COM_REG_BAUD_HIGH, COM_REG_BAUD_LOW, COM_REG_INTERRUPT_ID, COM_REG_LINE_CONTROL, COM_REG_MODEM_CONTROL, and com_reg_write().

Referenced by log_init().

◆ com_read()

uint8_t com_read ( com_port_t port )

Definition at line 14 of file com.c.

References COM_LINE_READ_READY, COM_REG_LINE_STATUS, com_reg_read(), and COM_REG_RECEIVE.

◆ com_reg_read()

uint8_t com_reg_read	(	com_port_t	port,
		com_reg_t	reg
	)

Definition at line 32 of file com.c.

References port_inb().

Referenced by com_read(), and com_write().

◆ com_reg_write()

void com_reg_write	(	com_port_t	port,
		com_reg_t	reg,
		uint8_t	value
	)

Definition at line 37 of file com.c.

References port_outb().

Referenced by com_init(), and com_write().

◆ com_write()

void com_write	(	com_port_t	port,
		uint8_t	value
	)

Definition at line 23 of file com.c.

References COM_LINE_WRITE_READY, COM_REG_LINE_STATUS, com_reg_read(), COM_REG_TRANSMIT, and com_reg_write().

Referenced by log_write().

Enumerations

Functions