Hallo
DDRC, wie alle anderen Register des Kontrollers, wird über io.h eingebunden. Als Beispiel die Datei iom8.h für den Mega8:
/* Copyright (c) 2002, Marek Michalkiewicz
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
/* $Id: iom8.h,v 1.14.2.7 2009/02/11 18:05:30 arcanum Exp $ */
/* avr/iom8.h - definitions for ATmega8 */
#ifndef _AVR_IOM8_H_
#define _AVR_IOM8_H_ 1
/* This file should only be included from <avr/io.h>, never directly. */
#ifndef _AVR_IO_H_
# error "Include <avr/io.h> instead of this file."
#endif
#ifndef _AVR_IOXXX_H_
# define _AVR_IOXXX_H_ "iom8.h"
#else
# error "Attempt to include more than one <avr/ioXXX.h> file."
#endif
/* I/O registers */
/* TWI stands for "Two Wire Interface" or "TWI Was I2C(tm)" */
#define TWBR _SFR_IO8(0x00)
#define TWSR _SFR_IO8(0x01)
#define TWAR _SFR_IO8(0x02)
#define TWDR _SFR_IO8(0x03)
/* ADC */
#define ADCW _SFR_IO16(0x04)
#ifndef __ASSEMBLER__
#define ADC _SFR_IO16(0x04)
#endif
#define ADCL _SFR_IO8(0x04)
#define ADCH _SFR_IO8(0x05)
#define ADCSR _SFR_IO8(0x06)
#define ADCSRA _SFR_IO8(0x06) /* Changed in 2486H-AVR-09/02 */
#define ADMUX _SFR_IO8(0x07)
/* analog comparator */
#define ACSR _SFR_IO8(0x08)
/* USART */
#define UBRRL _SFR_IO8(0x09)
#define UCSRB _SFR_IO8(0x0A)
#define UCSRA _SFR_IO8(0x0B)
#define UDR _SFR_IO8(0x0C)
/* SPI */
#define SPCR _SFR_IO8(0x0D)
#define SPSR _SFR_IO8(0x0E)
#define SPDR _SFR_IO8(0x0F)
/* Port D */
#define PIND _SFR_IO8(0x10)
#define DDRD _SFR_IO8(0x11)
#define PORTD _SFR_IO8(0x12)
/* Port C */
#define PINC _SFR_IO8(0x13)
#define DDRC _SFR_IO8(0x14)
#define PORTC _SFR_IO8(0x15)
/* Port B */
#define PINB _SFR_IO8(0x16)
#define DDRB _SFR_IO8(0x17)
#define PORTB _SFR_IO8(0x18)
/* EEPROM Control Register */
#define EECR _SFR_IO8(0x1C)
/* EEPROM Data Register */
#define EEDR _SFR_IO8(0x1D)
/* EEPROM Address Register */
#define EEAR _SFR_IO16(0x1E)
#define EEARL _SFR_IO8(0x1E)
#define EEARH _SFR_IO8(0x1F)
#define UCSRC _SFR_IO8(0x20)
#define UBRRH _SFR_IO8(0x20)
#define WDTCR _SFR_IO8(0x21)
#define ASSR _SFR_IO8(0x22)
/* Timer 2 */
#define OCR2 _SFR_IO8(0x23)
#define TCNT2 _SFR_IO8(0x24)
#define TCCR2 _SFR_IO8(0x25)
/* Timer 1 */
#define ICR1 _SFR_IO16(0x26)
#define ICR1L _SFR_IO8(0x26)
#define ICR1H _SFR_IO8(0x27)
#define OCR1B _SFR_IO16(0x28)
#define OCR1BL _SFR_IO8(0x28)
#define OCR1BH _SFR_IO8(0x29)
#define OCR1A _SFR_IO16(0x2A)
#define OCR1AL _SFR_IO8(0x2A)
#define OCR1AH _SFR_IO8(0x2B)
#define TCNT1 _SFR_IO16(0x2C)
#define TCNT1L _SFR_IO8(0x2C)
#define TCNT1H _SFR_IO8(0x2D)
#define TCCR1B _SFR_IO8(0x2E)
#define TCCR1A _SFR_IO8(0x2F)
#define SFIOR _SFR_IO8(0x30)
#define OSCCAL _SFR_IO8(0x31)
/* Timer 0 */
#define TCNT0 _SFR_IO8(0x32)
#define TCCR0 _SFR_IO8(0x33)
#define MCUCSR _SFR_IO8(0x34)
#define MCUSR _SFR_IO8(0x34) /* Defined as an alias for MCUCSR. */
#define MCUCR _SFR_IO8(0x35)
#define TWCR _SFR_IO8(0x36)
#define SPMCR _SFR_IO8(0x37)
#define TIFR _SFR_IO8(0x38)
#define TIMSK _SFR_IO8(0x39)
#define GIFR _SFR_IO8(0x3A)
#define GIMSK _SFR_IO8(0x3B)
#define GICR _SFR_IO8(0x3B) /* Changed in 2486H-AVR-09/02 */
/* 0x3C reserved (OCR0?) */
/* 0x3D..0x3E SP */
/* 0x3F SREG */
/* Interrupt vectors */
/* External Interrupt Request 0 */
#define INT0_vect _VECTOR(1)
#define SIG_INTERRUPT0 _VECTOR(1)
/* External Interrupt Request 1 */
#define INT1_vect _VECTOR(2)
#define SIG_INTERRUPT1 _VECTOR(2)
/* Timer/Counter2 Compare Match */
#define TIMER2_COMP_vect _VECTOR(3)
#define SIG_OUTPUT_COMPARE2 _VECTOR(3)
/* Timer/Counter2 Overflow */
#define TIMER2_OVF_vect _VECTOR(4)
#define SIG_OVERFLOW2 _VECTOR(4)
/* Timer/Counter1 Capture Event */
#define TIMER1_CAPT_vect _VECTOR(5)
#define SIG_INPUT_CAPTURE1 _VECTOR(5)
/* Timer/Counter1 Compare Match A */
#define TIMER1_COMPA_vect _VECTOR(6)
#define SIG_OUTPUT_COMPARE1A _VECTOR(6)
/* Timer/Counter1 Compare Match B */
#define TIMER1_COMPB_vect _VECTOR(7)
#define SIG_OUTPUT_COMPARE1B _VECTOR(7)
/* Timer/Counter1 Overflow */
#define TIMER1_OVF_vect _VECTOR(8)
#define SIG_OVERFLOW1 _VECTOR(8)
/* Timer/Counter0 Overflow */
#define TIMER0_OVF_vect _VECTOR(9)
#define SIG_OVERFLOW0 _VECTOR(9)
/* Serial Transfer Complete */
#define SPI_STC_vect _VECTOR(10)
#define SIG_SPI _VECTOR(10)
/* USART, Rx Complete */
#define USART_RXC_vect _VECTOR(11)
#define SIG_UART_RECV _VECTOR(11)
/* USART Data Register Empty */
#define USART_UDRE_vect _VECTOR(12)
#define SIG_UART_DATA _VECTOR(12)
/* USART, Tx Complete */
#define USART_TXC_vect _VECTOR(13)
#define SIG_UART_TRANS _VECTOR(13)
/* ADC Conversion Complete */
#define ADC_vect _VECTOR(14)
#define SIG_ADC _VECTOR(14)
/* EEPROM Ready */
#define EE_RDY_vect _VECTOR(15)
#define SIG_EEPROM_READY _VECTOR(15)
/* Analog Comparator */
#define ANA_COMP_vect _VECTOR(16)
#define SIG_COMPARATOR _VECTOR(16)
/* 2-wire Serial Interface */
#define TWI_vect _VECTOR(17)
#define SIG_2WIRE_SERIAL _VECTOR(17)
/* Store Program Memory Ready */
#define SPM_RDY_vect _VECTOR(18)
#define SIG_SPM_READY _VECTOR(18)
#define _VECTORS_SIZE 38
/* Bit numbers */
/* GIMSK / GICR */
#define INT1 7
#define INT0 6
#define IVSEL 1
#define IVCE 0
/* GIFR */
#define INTF1 7
#define INTF0 6
/* TIMSK */
#define OCIE2 7
#define TOIE2 6
#define TICIE1 5
#define OCIE1A 4
#define OCIE1B 3
#define TOIE1 2
/* bit 1 reserved (OCIE0?) */
#define TOIE0 0
/* TIFR */
#define OCF2 7
#define TOV2 6
#define ICF1 5
#define OCF1A 4
#define OCF1B 3
#define TOV1 2
/* bit 1 reserved (OCF0?) */
#define TOV0 0
/* SPMCR */
#define SPMIE 7
#define RWWSB 6
/* bit 5 reserved */
#define RWWSRE 4
#define BLBSET 3
#define PGWRT 2
#define PGERS 1
#define SPMEN 0
/* TWCR */
#define TWINT 7
#define TWEA 6
#define TWSTA 5
#define TWSTO 4
#define TWWC 3
#define TWEN 2
/* bit 1 reserved (TWI_TST?) */
#define TWIE 0
/* TWAR */
#define TWA6 7
#define TWA5 6
#define TWA4 5
#define TWA3 4
#define TWA2 3
#define TWA1 2
#define TWA0 1
#define TWGCE 0
/* TWSR */
#define TWS7 7
#define TWS6 6
#define TWS5 5
#define TWS4 4
#define TWS3 3
/* bit 2 reserved */
#define TWPS1 1
#define TWPS0 0
/* MCUCR */
#define SE 7
#define SM2 6
#define SM1 5
#define SM0 4
#define ISC11 3
#define ISC10 2
#define ISC01 1
#define ISC00 0
/* MCUCSR */
/* bits 7-4 reserved */
#define WDRF 3
#define BORF 2
#define EXTRF 1
#define PORF 0
/*
The ADHSM bit has been removed from all documentation,
as being not needed at all since the comparator has proven
to be fast enough even without feeding it more power.
*/
/* SFIOR */
/* bits 7-5 reserved */
#define ACME 3
#define PUD 2
#define PSR2 1
#define PSR10 0
/* TCCR0 */
/* bits 7-3 reserved */
#define CS02 2
#define CS01 1
#define CS00 0
/* TCCR2 */
#define FOC2 7
#define WGM20 6
#define COM21 5
#define COM20 4
#define WGM21 3
#define CS22 2
#define CS21 1
#define CS20 0
/* ASSR */
/* bits 7-4 reserved */
#define AS2 3
#define TCN2UB 2
#define OCR2UB 1
#define TCR2UB 0
/* TCCR1A */
#define COM1A1 7
#define COM1A0 6
#define COM1B1 5
#define COM1B0 4
#define FOC1A 3
#define FOC1B 2
#define WGM11 1
#define WGM10 0
/* TCCR1B */
#define ICNC1 7
#define ICES1 6
/* bit 5 reserved */
#define WGM13 4
#define WGM12 3
#define CS12 2
#define CS11 1
#define CS10 0
/* WDTCR */
/* bits 7-5 reserved */
#define WDCE 4
#define WDE 3
#define WDP2 2
#define WDP1 1
#define WDP0 0
/* UBRRH */
#define URSEL 7
/* UCSRC */
#define URSEL 7
#define UMSEL 6
#define UPM1 5
#define UPM0 4
#define USBS 3
#define UCSZ1 2
#define UCSZ0 1
#define UCPOL 0
/* PORTB */
#define PB7 7
#define PB6 6
#define PB5 5
#define PB4 4
#define PB3 3
#define PB2 2
#define PB1 1
#define PB0 0
/* DDRB */
#define DDB7 7
#define DDB6 6
#define DDB5 5
#define DDB4 4
#define DDB3 3
#define DDB2 2
#define DDB1 1
#define DDB0 0
/* PINB */
#define PINB7 7
#define PINB6 6
#define PINB5 5
#define PINB4 4
#define PINB3 3
#define PINB2 2
#define PINB1 1
#define PINB0 0
/* PORTC */
#define PC6 6
#define PC5 5
#define PC4 4
#define PC3 3
#define PC2 2
#define PC1 1
#define PC0 0
/* DDRC */
#define DDC6 6
#define DDC5 5
#define DDC4 4
#define DDC3 3
#define DDC2 2
#define DDC1 1
#define DDC0 0
/* PINC */
#define PINC6 6
#define PINC5 5
#define PINC4 4
#define PINC3 3
#define PINC2 2
#define PINC1 1
#define PINC0 0
/* PORTD */
#define PD7 7
#define PD6 6
#define PD5 5
#define PD4 4
#define PD3 3
#define PD2 2
#define PD1 1
#define PD0 0
/* DDRD */
#define DDD7 7
#define DDD6 6
#define DDD5 5
#define DDD4 4
#define DDD3 3
#define DDD2 2
#define DDD1 1
#define DDD0 0
/* PIND */
#define PIND7 7
#define PIND6 6
#define PIND5 5
#define PIND4 4
#define PIND3 3
#define PIND2 2
#define PIND1 1
#define PIND0 0
/* SPSR */
#define SPIF 7
#define WCOL 6
#define SPI2X 0
/* SPCR */
#define SPIE 7
#define SPE 6
#define DORD 5
#define MSTR 4
#define CPOL 3
#define CPHA 2
#define SPR1 1
#define SPR0 0
/* UCSRA */
#define RXC 7
#define TXC 6
#define UDRE 5
#define FE 4
#define DOR 3
#define PE 2
#define U2X 1
#define MPCM 0
/* UCSRB */
#define RXCIE 7
#define TXCIE 6
#define UDRIE 5
#define RXEN 4
#define TXEN 3
#define UCSZ2 2
#define RXB8 1
#define TXB8 0
/* ACSR */
#define ACD 7
#define ACBG 6
#define ACO 5
#define ACI 4
#define ACIE 3
#define ACIC 2
#define ACIS1 1
#define ACIS0 0
/* ADCSR / ADCSRA */
#define ADEN 7
#define ADSC 6
#define ADFR 5
#define ADIF 4
#define ADIE 3
#define ADPS2 2
#define ADPS1 1
#define ADPS0 0
/* ADMUX */
#define REFS1 7
#define REFS0 6
#define ADLAR 5
/* bit 4 reserved */
#define MUX3 3
#define MUX2 2
#define MUX1 1
#define MUX0 0
/* EEPROM Control Register */
#define EERIE 3
#define EEMWE 2
#define EEWE 1
#define EERE 0
/* Constants */
#define SPM_PAGESIZE 64
#define RAMEND 0x45F
#define XRAMEND RAMEND
#define E2END 0x1FF
#define E2PAGESIZE 4
#define FLASHEND 0x1FFF
/* Fuses */
#define FUSE_MEMORY_SIZE 2
/* Low Fuse Byte */
#define FUSE_CKSEL0 (unsigned char)~_BV(0)
#define FUSE_CKSEL1 (unsigned char)~_BV(1)
#define FUSE_CKSEL2 (unsigned char)~_BV(2)
#define FUSE_CKSEL3 (unsigned char)~_BV(3)
#define FUSE_SUT0 (unsigned char)~_BV(4)
#define FUSE_SUT1 (unsigned char)~_BV(5)
#define FUSE_BODEN (unsigned char)~_BV(6)
#define FUSE_BODLEVEL (unsigned char)~_BV(7)
#define LFUSE_DEFAULT (FUSE_SUT0 & FUSE_CKSEL3 & FUSE_CKSEL2 & FUSE_CKSEL1)
/* High Fuse Byte */
#define FUSE_BOOTRST (unsigned char)~_BV(0)
#define FUSE_BOOTSZ0 (unsigned char)~_BV(1)
#define FUSE_BOOTSZ1 (unsigned char)~_BV(2)
#define FUSE_EESAVE (unsigned char)~_BV(3)
#define FUSE_CKOPT (unsigned char)~_BV(4)
#define FUSE_SPIEN (unsigned char)~_BV(5)
#define FUSE_WDTON (unsigned char)~_BV(6)
#define FUSE_RSTDISBL (unsigned char)~_BV(7)
#define HFUSE_DEFAULT (FUSE_SPIEN & FUSE_BOOTSZ1 & FUSE_BOOTSZ0)
/* Lock Bits */
#define __LOCK_BITS_EXIST
#define __BOOT_LOCK_BITS_0_EXIST
#define __BOOT_LOCK_BITS_1_EXIST
/* Signature */
#define SIGNATURE_0 0x1E
#define SIGNATURE_1 0x93
#define SIGNATURE_2 0x07
#endif /* _AVR_IOM8_H_ */
#define ist ein Preprozessorbefehl ähnlich wie Alias. io.h entscheidet nach den Kontroller-Angaben im Makefile welche IO-Datei verwendet wird und befindet sich im Verzeichniss winavr\avr\include\avr
Viel Spass beim Einstieg in C.
Gruß
mic