usart.c File Reference

Serial interface functions. More...

#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>

Include dependency graph for usart.c:

Go to the source code of this file.

Defines
#define	USART_UBBR_CALC(baud)   (F_CPU / ((baud << 4)) - 1u)
#define	USART0_BAUD_RATE   (19200ul)
#define	USART_PRINTF_BUF_SIZE   (128)
Functions
void	USART0_init (void)
	Initialize UART.
unsigned char	USART0_getc (void)
	Read one byte from serial port.
void	USART0_putc (unsigned char data)
	Write one byte to the serial port.
void	USART0_puts (const char *data)
	Write a null-terminated string to the serial port.
void	USART0_printf (const char *fmt,...)
	Printf function which uses UART interface to send.

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Detailed Description

Serial interface functions.

Author:

Copyright (C) Peter Ivanov, 2010

Created 2010-08-07 11:48:53 Last modify: 2010-08-07 11:51:36 ivanovp {Time-stamp} Licence: GPL

Definition in file usart.c.

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Define Documentation

#define USART0_BAUD_RATE   (19200ul)

Definition at line 18 of file usart.c.

#define USART_PRINTF_BUF_SIZE   (128)

Definition at line 19 of file usart.c.

#define USART_UBBR_CALC

(

baud

)

(F_CPU / ((baud << 4)) - 1u)

Definition at line 17 of file usart.c.

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Function Documentation

unsigned char USART0_getc

(

void

)

Read one byte from serial port.

It waits for the data.

Returns:

The received character.

Definition at line 43 of file usart.c.

void USART0_init

(

void

)

Initialize UART.

Baud rate is in USART0_BAUD_RATE.

See also:

USART0_BAUD_RATE

Definition at line 25 of file usart.c.

void USART0_printf	(	const char *	fmt,
			...
	)

Printf function which uses UART interface to send.

Example:

UART_printf ("Number: %02i\r\n", number);

Parameters:

fmt

Printf format string. Example: "Value: %02i\r\n"

Definition at line 89 of file usart.c.

void USART0_putc

(

unsigned char

data

)

Write one byte to the serial port.

Parameters:

data

Byte to send.

Definition at line 57 of file usart.c.

void USART0_puts

(

const char *

data

)

Write a null-terminated string to the serial port.

Parameters:

data

String to send.

Definition at line 71 of file usart.c.