Removing wiring_serial.c as it's no longer used. (All serial functionality is now in HardwareSerial.h / HardwareSerial.cpp.)
This commit is contained in:
parent
31e765f1cb
commit
4cb002648c
|
@ -1,129 +0,0 @@
|
|||
/*
|
||||
wiring_serial.c - serial functions.
|
||||
Part of Arduino - http://www.arduino.cc/
|
||||
|
||||
Copyright (c) 2005-2006 David A. Mellis
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General
|
||||
Public License along with this library; if not, write to the
|
||||
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
||||
Boston, MA 02111-1307 USA
|
||||
|
||||
$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
|
||||
*/
|
||||
|
||||
#include "wiring_private.h"
|
||||
|
||||
// Define constants and variables for buffering incoming serial data. We're
|
||||
// using a ring buffer (I think), in which rx_buffer_head is the index of the
|
||||
// location to which to write the next incoming character and rx_buffer_tail
|
||||
// is the index of the location from which to read.
|
||||
#define RX_BUFFER_SIZE 128
|
||||
|
||||
unsigned char rx_buffer[RX_BUFFER_SIZE];
|
||||
|
||||
int rx_buffer_head = 0;
|
||||
int rx_buffer_tail = 0;
|
||||
|
||||
void beginSerial(long baud)
|
||||
{
|
||||
#if defined(__AVR_ATmega8__)
|
||||
UBRRH = ((F_CPU / 16 + baud / 2) / baud - 1) >> 8;
|
||||
UBRRL = ((F_CPU / 16 + baud / 2) / baud - 1);
|
||||
|
||||
// enable rx and tx
|
||||
sbi(UCSRB, RXEN);
|
||||
sbi(UCSRB, TXEN);
|
||||
|
||||
// enable interrupt on complete reception of a byte
|
||||
sbi(UCSRB, RXCIE);
|
||||
#else
|
||||
UBRR0H = ((F_CPU / 16 + baud / 2) / baud - 1) >> 8;
|
||||
UBRR0L = ((F_CPU / 16 + baud / 2) / baud - 1);
|
||||
|
||||
// enable rx and tx
|
||||
sbi(UCSR0B, RXEN0);
|
||||
sbi(UCSR0B, TXEN0);
|
||||
|
||||
// enable interrupt on complete reception of a byte
|
||||
sbi(UCSR0B, RXCIE0);
|
||||
#endif
|
||||
|
||||
// defaults to 8-bit, no parity, 1 stop bit
|
||||
}
|
||||
|
||||
void serialWrite(unsigned char c)
|
||||
{
|
||||
#if defined(__AVR_ATmega8__)
|
||||
while (!(UCSRA & (1 << UDRE)))
|
||||
;
|
||||
|
||||
UDR = c;
|
||||
#else
|
||||
while (!(UCSR0A & (1 << UDRE0)))
|
||||
;
|
||||
|
||||
UDR0 = c;
|
||||
#endif
|
||||
}
|
||||
|
||||
int serialAvailable()
|
||||
{
|
||||
return (RX_BUFFER_SIZE + rx_buffer_head - rx_buffer_tail) % RX_BUFFER_SIZE;
|
||||
}
|
||||
|
||||
int serialRead()
|
||||
{
|
||||
// if the head isn't ahead of the tail, we don't have any characters
|
||||
if (rx_buffer_head == rx_buffer_tail) {
|
||||
return -1;
|
||||
} else {
|
||||
unsigned char c = rx_buffer[rx_buffer_tail];
|
||||
rx_buffer_tail = (rx_buffer_tail + 1) % RX_BUFFER_SIZE;
|
||||
return c;
|
||||
}
|
||||
}
|
||||
|
||||
void serialFlush()
|
||||
{
|
||||
// don't reverse this or there may be problems if the RX interrupt
|
||||
// occurs after reading the value of rx_buffer_head but before writing
|
||||
// the value to rx_buffer_tail; the previous value of rx_buffer_head
|
||||
// may be written to rx_buffer_tail, making it appear as if the buffer
|
||||
// were full, not empty.
|
||||
rx_buffer_head = rx_buffer_tail;
|
||||
}
|
||||
|
||||
#if defined(__AVR_ATmega8__)
|
||||
SIGNAL(SIG_UART_RECV)
|
||||
#else
|
||||
SIGNAL(USART_RX_vect)
|
||||
#endif
|
||||
{
|
||||
#if defined(__AVR_ATmega8__)
|
||||
unsigned char c = UDR;
|
||||
#else
|
||||
unsigned char c = UDR0;
|
||||
#endif
|
||||
|
||||
int i = (rx_buffer_head + 1) % RX_BUFFER_SIZE;
|
||||
|
||||
// if we should be storing the received character into the location
|
||||
// just before the tail (meaning that the head would advance to the
|
||||
// current location of the tail), we're about to overflow the buffer
|
||||
// and so we don't write the character or advance the head.
|
||||
if (i != rx_buffer_tail) {
|
||||
rx_buffer[rx_buffer_head] = c;
|
||||
rx_buffer_head = i;
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue