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217 lines
5.9 KiB
C
217 lines
5.9 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: rs232.c,v 1.5 2009/03/17 20:32:22 adamdunkels Exp $
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*/
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#include <stdio.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/pgmspace.h>
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#include "contiki-conf.h"
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#include "contiki.h"
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#include "dev/slip.h"
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#include "dev/rs232.h"
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#ifdef RS232_CONF_PRINTF_BUFFER_LENGTH
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#define RS232_PRINTF_BUFFER_LENGTH RS232_CONF_PRINTF_BUFFER_LENGTH
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#else
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#define RS232_PRINTF_BUFFER_LENGTH 64
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#endif
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#if defined (__AVR_ATmega128__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega1281__)
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typedef struct {
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volatile uint8_t * UDR;
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volatile uint8_t * UBRRH;
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volatile uint8_t * UBRRL;
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volatile uint8_t * UCSRB;
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volatile uint8_t * UCSRC;
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volatile uint8_t txwait;
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int (* input_handler)(unsigned char);
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} rs232_t;
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static rs232_t rs232_ports[2] = {
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{ // UART0
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&UDR0,
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&UBRR0H,
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&UBRR0L,
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&UCSR0B,
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&UCSR0C,
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0,
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NULL
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},
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{ // UART1
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&UDR1,
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&UBRR1H,
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&UBRR1L,
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&UCSR1B,
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&UCSR1C,
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0,
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NULL
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}
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};
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#else
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#error Please define the UART registers for your MCU!
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#endif
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/*---------------------------------------------------------------------------*/
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ISR(USART0_TX_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART0_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].UDR);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART1_TX_vect)
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{
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rs232_ports[RS232_PORT_1].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART1_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_1].UDR);
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if(rs232_ports[RS232_PORT_1].input_handler != NULL) {
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rs232_ports[RS232_PORT_1].input_handler(c);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_init (uint8_t port, uint8_t bd, uint8_t ffmt)
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{
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*(rs232_ports[port].UBRRH) = (uint8_t)(bd>>8);
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*(rs232_ports[port].UBRRL) = (uint8_t)bd;
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/*
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* - Enable receiver and transmitter,
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* - Enable interrupts for receiver and transmitter
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*/
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*(rs232_ports[port].UCSRB) = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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/*
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* - mode (sync. / async)
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* - Parity
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* - Stop bits
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* - charater size (9 bits are currently not supported)
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* - clock polarity
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*/
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*(rs232_ports[port].UCSRC) = ffmt;
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rs232_ports[port].txwait = 0;
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rs232_ports[port].input_handler = NULL;
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}
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void
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rs232_print_p(uint8_t port, prog_char *buf)
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{
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while(pgm_read_byte(buf)) {
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rs232_send(port, pgm_read_byte(buf));
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++buf;
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_print(uint8_t port, char *buf)
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{
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while(*buf) {
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rs232_send(port, *buf++);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_printf(uint8_t port, const char *fmt, ...)
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{
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va_list ap;
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static char buf[RS232_PRINTF_BUFFER_LENGTH];
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va_start (ap, fmt);
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vsnprintf (buf, RS232_PRINTF_BUFFER_LENGTH, fmt, ap);
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va_end(ap);
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rs232_print (port, buf);
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_send(uint8_t port, unsigned char c)
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{
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rs232_ports[port].txwait = 1;
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*(rs232_ports[port].UDR) = c;
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while(rs232_ports[port].txwait);
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_set_input(uint8_t port, int (*f)(unsigned char))
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{
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rs232_ports[port].input_handler = f;
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_arch_writeb(unsigned char c)
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{
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rs232_send(SLIP_PORT, c);
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}
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/*---------------------------------------------------------------------------*/
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int rs232_stdout_putchar(char c, FILE *stream);
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static uint8_t stdout_rs232_port=RS232_PORT_0;
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static FILE rs232_stdout = FDEV_SETUP_STREAM(rs232_stdout_putchar,
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NULL,
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_FDEV_SETUP_WRITE);
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int rs232_stdout_putchar(char c, FILE *stream)
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{
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rs232_send (stdout_rs232_port, c);
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void rs232_redirect_stdout (uint8_t port) {
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stdout_rs232_port = port;
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stdout = &rs232_stdout;
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}
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