serial.c File Reference

#include "serial.h"
#include <stddef.h>
#include "../../common/io.h"
#include "../../common/status.h"
#include "../../common/string.h"

Functions
int	ser_Init (uint16_t port, uint16_t divisor)
	Initializes specified Serial port.
int	ser_TransmitEmpty (uint16_t port)
	Checks if Transmitter holding register is empty (can write).
void	ser_PrintChar (uint16_t port, char c)
	Prints single character to Serial port.
void	ser_PrintString (uint16_t port, const char *str)
	Prints string to specified Serial port.
int	ser_Received (uint16_t port)
	Checks if port has unread value.
char	ser_ReadChar (uint16_t port)
	Reads single character from Serial port.

Function Documentation

ser_Init()

int ser_Init	(	uint16_t	port,
		uint16_t	divisor )

Initializes specified Serial port.

Parameters

port	Serial port address pointer
divisor	0-65535 divisor for 115200 base speed

Returns

int Status

References ALL_OK, EIO, outb(), ser_PrintChar(), ser_ReadChar(), and ser_Received().

ser_PrintChar()

void ser_PrintChar	(	uint16_t	port,
		char	c )

Prints single character to Serial port.

Parameters

port	Serial port pointer
c	Character to write

References outb(), and ser_TransmitEmpty().

ser_PrintString()

void ser_PrintString	(	uint16_t	port,
		const char *	str )

Prints string to specified Serial port.

Parameters

port	Serial port pointer
str	String to write

References ser_PrintChar(), and strlen().

ser_ReadChar()

char ser_ReadChar

(

uint16_t

port

)

Reads single character from Serial port.

Parameters

port	Serial port pointer

Returns

char Read character

References inb().

ser_Received()

int ser_Received

(

uint16_t

port

)

Checks if port has unread value.

Parameters

port	Serial port pointer

Returns

int 1 if can read

References inb().

ser_TransmitEmpty()

int ser_TransmitEmpty

(

uint16_t

port

)

Checks if Transmitter holding register is empty (can write).

Parameters

port	Serial port pointer

Returns

int 1 if empty

References inb().