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444 lines
12 KiB
C
444 lines
12 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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*/
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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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/*ATmega32 and smaller have UBRRH/UCSRC at the same I/O address.
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*USART_UCSRC_SEL (bit7) selects writing to UBRHH(0) or UCSRC(1).
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*It is OR'd in below so if not defined we can just set it to zero.
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*/
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#ifndef USART_UCSRC_SEL
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#define USART_UCSRC_SEL 0x00
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#endif
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/* Currently only the STK500 platform uses a static RAM buffer for printfs.
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* Others print a character at a time using the gcc string pointer.
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* gcc may not strip the unused buffer, even though it is statically
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* allocated in an unused routine.
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*/
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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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#if CONTIKI_TARGET_STK500
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#define RS232_PRINTF_BUFFER_LENGTH 64
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#endif
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#endif
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/* TX interrupts would allow non-blocking output up to the size of some RAM buffer.
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* Since a RAM buffer is not implemented tx interrupts are superfluous and unwanted
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* because they block debug prints from within interrupt routines
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*/
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#ifdef RS232_CONF_TX_INTERRUPTS
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#define RS232_TX_INTERRUPTS RS232_CONF_TX_INTERRUPTS
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#else
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#define RS232_TX_INTERRUPTS 0
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#endif
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/* Insert a carriage return after a line feed. This is the default. */
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#ifndef ADD_CARRIAGE_RETURN_AFTER_NEWLINE
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#define ADD_CARRIAGE_RETURN_AFTER_NEWLINE 1
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#endif
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/* Reducing NUMPORTS from the default will harmlessly disable usage of those ports */
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/* Two ports take 400 bytes flash and 4 bytes RAM. */
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#ifdef RS232_CONF_NUMPORTS
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#define NUMPORTS RS232_CONF_NUMPORTS
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#endif
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#if defined (__AVR_ATmega128__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega128RFA1__) || defined(__AVR_ATmega128RFR2__) || defined(__AVR_ATmega256RFR2__)
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#ifndef NUMPORTS
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#define NUMPORTS 2
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#elif NUMPORTS > 2
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#error Only two serial ports are defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART0_RX_vect
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#define D_USART0_TX_vect USART0_TX_vect
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#if NUMPORTS > 1
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#define D_UDR1 UDR1
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#define D_UDRE1M (1 << UDRE1)
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#define D_UBRR1H UBRR1H
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#define D_UBRR1L UBRR1L
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#define D_UCSR1A UCSR1A
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#define D_UCSR1B UCSR1B
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#define D_UCSR1C UCSR1C
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#define D_USART1_RX_vect USART1_RX_vect
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#define D_USART1_TX_vect USART1_TX_vect
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#endif
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#endif
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#elif defined (__AVR_AT90USB1287__)
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/* Has only UART1, map it to port 0 */
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR1
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#define D_UDRE0M (1 << UDRE1)
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#define D_UBRR0H UBRR1H
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#define D_UBRR0L UBRR1L
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#define D_UCSR0A UCSR1A
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#define D_UCSR0B UCSR1B
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#define D_UCSR0C UCSR1C
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#define D_USART0_RX_vect USART1_RX_vect
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#define D_USART0_TX_vect USART1_TX_vect
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#endif
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#elif defined (__AVR_ATmega8515__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR
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#define D_UDRE0M (1 << UDRE)
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#define D_UBRR0H UBRRH
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#define D_UBRR0L UBRRL
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#define D_UCSR0A UCSRA
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#define D_UCSR0B UCSRB
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#define D_UCSR0C UCSRC
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#define D_USART0_RX_vect USART_RX_vect
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#define D_USART0_TX_vect USART_TX_vect
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#endif
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#elif defined (__AVR_ATmega328P__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART_RX_vect
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#define D_USART0_TX_vect USART_TX_vect
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#endif
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#elif defined (__AVR_ATmega8__) || defined (__AVR_ATmega16__) || defined (__AVR_ATmega32__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR
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#define D_UDRE0M (1 << UDRE)
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#define D_UBRR0H UBRRH
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#define D_UBRR0L UBRRL
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#define D_UCSR0A UCSRA
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#define D_UCSR0B UCSRB
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#define D_UCSR0C UCSRC
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#define D_USART0_RX_vect USART_RXC_vect
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#define D_USART0_TX_vect USART_TXC_vect
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#endif
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#elif defined (__AVR_ATmega644__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART0_RX_vect
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#define D_USART0_TX_vect USART0_TX_vect
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#endif
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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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#if NUMPORTS > 0
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int (* input_handler_0)(unsigned char);
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ISR(D_USART0_RX_vect)
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{
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unsigned char c;
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c = D_UDR0;
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if (input_handler_0 != NULL) input_handler_0(c);
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}
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_0;
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ISR(D_USART0_TX_vect)
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{
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txwait_0 = 0;
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}
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#endif
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#if NUMPORTS > 1
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int (* input_handler_1)(unsigned char);
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ISR(D_USART1_RX_vect)
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{
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unsigned char c;
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c = D_UDR1;
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if (input_handler_1 != NULL) input_handler_1(c);
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}
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_1;
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ISR(USART1_TX_vect)
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{
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txwait_1 = 0;
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}
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#endif
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#if NUMPORTS > 2
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int (* input_handler_2)(unsigned char);
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ISR(D_USART2_RX_vect)
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{
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unsigned char c;
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c = D_UDR2;
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if (input_handler_2 != NULL) input_handler_2(c);
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}
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_2;
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ISR(USART2_TX_vect)
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{
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txwait_2= 0;
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}
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#endif
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#endif
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#endif
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#endif
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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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#if NUMPORTS > 0
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if (port == 0) {
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D_UBRR0H = (uint8_t)(bd>>8);
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D_UBRR0L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_0 = 0;
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D_UCSR0B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#else
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D_UCSR0B = USART_INTERRUPT_RX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#endif
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D_UCSR0C = USART_UCSRC_SEL | ffmt;
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input_handler_0 = NULL;
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#if NUMPORTS > 1
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} else if (port == 1) {
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D_UBRR1H = (uint8_t)(bd>>8);
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D_UBRR1L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_1 = 0;
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D_UCSR1B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#else
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D_UCSR1B = USART_INTERRUPT_RX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#endif
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D_UCSR1C = USART_UCSRC_SEL | ffmt;
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input_handler_1 = NULL;
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#if NUMPORTS > 2
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} else if (port == 2) {
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D_UBRR2H = (uint8_t)(bd>>8);
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D_UBRR2L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_2 = 0;
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D_UCSR2B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#else
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D_UCSR2B = USART_INTERRUPT_RX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#endif
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D_UCSR2C = USART_UCSRC_SEL | ffmt;
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input_handler_2 = NULL;
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#endif
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#endif
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}
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#endif /* NUMPORTS > 0 */
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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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#if RS232_TX_INTERRUPTS
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/* Output character and block until it is transmitted */
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#if NUMPORTS > 0
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if (port == 0 ) {
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txwait_0 = 1;
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D_UDR0 = c;
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while (txwait_0);
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#if NUMPORTS > 1
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} else if (port == 1) {
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txwait_1 = 1;
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D_UDR1 = c;
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while (txwait_1);
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#if NUMPORTS > 2
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} else if (port == 2) {
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txwait_2 = 1;
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D_UDR2 = c;
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while (txwait_2);
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#endif
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#endif
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}
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#endif
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#else /* RS232_TX_INTERRUPTS */
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/* Block until tx ready and output character */
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#if NUMPORTS > 0
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if (port == 0 ) {
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while (!(D_UCSR0A & D_UDRE0M));
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D_UDR0 = c;
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#if NUMPORTS > 1
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} else if (port == 1) {
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while (!(D_UCSR1A & D_UDRE1M));
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D_UDR1 = c;
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#if NUMPORTS > 2
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} else if (port == 2) {
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while (!(D_UCSR2A & D_UDRE2M));
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D_UDR2 = c;
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#endif
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#endif
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}
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#endif
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#endif /* RS232_TX_INTERRUPTS */
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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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#if NUMPORTS > 0
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if (port == 0) {
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input_handler_0 = f;
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#if NUMPORTS > 1
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} else if (port == 1) {
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input_handler_1 = f;
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#if NUMPORTS > 2
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} else if (port == 2) {
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input_handler_2 = f;
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#endif
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#endif
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}
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#endif
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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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#if ADD_CARRIAGE_RETURN_AFTER_NEWLINE
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if(*buf=='\n') rs232_send(port, '\r');
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if(*buf=='\r') buf++; else rs232_send(port, *buf++);
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#else
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rs232_send(port, *buf++);
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#endif
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}
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}
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#if RS232_PRINTF_BUFFER_LENGTH
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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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#endif
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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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#if ADD_CARRIAGE_RETURN_AFTER_NEWLINE
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if(c=='\n') rs232_send(stdout_rs232_port, '\r');
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if(c!='\r') rs232_send (stdout_rs232_port, c);
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#else
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rs232_send (stdout_rs232_port, c);
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#endif
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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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