usart.c File Reference

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "utils.h"
#include "usart.h"

Include dependency graph for usart.c:

Go to the source code of this file.

Defines
#define	UART_RX_BUFFER_MASK   ( UART_RX_BUFFER_SIZE - 1 )
#define	UART_RX_BUFFER_SIZE   64 /* 2,4,8,16,32,64,128 or 256 bytes */
	AVR includes.
#define	UART_TX_BUFFER_MASK   ( UART_TX_BUFFER_SIZE - 1 )
#define	UART_TX_BUFFER_SIZE   64
Functions
	ISR (USART0_RX_vect)
	ISR (USART0_UDRE_vect)
void	uart_bufferFlush (const int8_t b)
unsigned char	uart_DataInReceiveBuffer ()
unsigned char	uart_getc (void)
char	uart_gets (char *str)
void	uart_init ()
void	uart_loopback ()
void	uart_putc (unsigned char data)
void	uart_puts (const char *str)
Variables
static unsigned char	UART_RxBuf [UART_RX_BUFFER_SIZE]
static volatile char	UART_RxHead
static volatile char	UART_RxTail
static unsigned char	UART_TxBuf [UART_TX_BUFFER_SIZE]
static volatile char	UART_TxHead
static volatile char	UART_TxTail

---

Detailed Description

Code usart module setup and operation

Version:

1.0

Author:

Julio Sagardoy

Definition in file usart.c.

---

Define Documentation

#define UART_RX_BUFFER_MASK   ( UART_RX_BUFFER_SIZE - 1 )

Definition at line 29 of file usart.c.

#define UART_RX_BUFFER_SIZE   64 /* 2,4,8,16,32,64,128 or 256 bytes */

AVR includes.

Own includes

Definition at line 26 of file usart.c.

#define UART_TX_BUFFER_MASK   ( UART_TX_BUFFER_SIZE - 1 )

Definition at line 34 of file usart.c.

#define UART_TX_BUFFER_SIZE   64

Definition at line 27 of file usart.c.

---

Function Documentation

ISR

(

USART0_RX_vect

)

Definition at line 151 of file usart.c.

ISR

(

USART0_UDRE_vect

)

Definition at line 179 of file usart.c.

void uart_bufferFlush

(

const int8_t

b

)

Definition at line 129 of file usart.c.

unsigned char uart_DataInReceiveBuffer

(

)

Tells if there is data in the rxcycle buffer

Definition at line 111 of file usart.c.

unsigned char uart_getc

(

void

)

Extract a single character from rx cycle buffer

Definition at line 48 of file usart.c.

char uart_gets

(

char *

str

)

Points to an entire string from rx cycle buffer. The end is signaled by a Unix <LF>. Returns the number of characters of the string

Definition at line 81 of file usart.c.

void uart_init

(

void

)

Initializes UART ports and cycle buffers

Definition at line 200 of file usart.c.

void uart_loopback

(

)

Echoes back received characters, except for 'q', which ends mode

Definition at line 118 of file usart.c.

void uart_putc

(

unsigned char

data

)

Put a single character to the tx cycle buffer

Definition at line 63 of file usart.c.

void uart_puts

(

const char *

str

)

Put an entire string into the tx cycle buffer. Appends a Unix <LF>

Definition at line 101 of file usart.c.

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Variable Documentation

unsigned char UART_RxBuf[UART_RX_BUFFER_SIZE] [static]

Definition at line 39 of file usart.c.

volatile char UART_RxHead [static]

Definition at line 40 of file usart.c.

volatile char UART_RxTail [static]

Definition at line 41 of file usart.c.

unsigned char UART_TxBuf[UART_TX_BUFFER_SIZE] [static]

Definition at line 42 of file usart.c.

volatile char UART_TxHead [static]

Definition at line 43 of file usart.c.

volatile char UART_TxTail [static]

Definition at line 44 of file usart.c.