程序如下：
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/delay.h>
#include <stdio.h>
int main(void)
{DDRA=0XFF;
PORTA=0XFF;
}
错误如下：
-------- begin --------
avr-gcc (GCC) 3.4.6
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiling: IO.c
avr-gcc -c -mmcu=atmega8 -I. -gdwarf-2 -DF_CPU=8000000UL -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=IO.lst -std=gnu99 -MD -MP -MF .dep/IO.o.d IO.c -o IO.o
In file included from IO.c:4:
C:/WinAVR/avr/include/avr/signal.h:36:2: warning: #warning "This header file is obsolete. Use <avr/interrupt.h>."
In file included from IO.c:5:
C:/WinAVR/avr/include/avr/delay.h:36:2: warning: #warning "This file has been moved to <util/delay.h>."
IO.c: In function `main':
IO.c:9: error: `DDRA' undeclared (first use in this function)
IO.c:9: error: (Each undeclared identifier is reported only once
IO.c:9: error: for each function it appears in.)
IO.c:10: error: `PORTA' undeclared (first use in this function)
IO.c:11:2: warning: no newline at end of file
make.exe: *** [IO.o] Error 1
> Process Exit Code: 2
> Time Taken: 00:0
makefile如下：
# MCU name
MCU = atmega8
# Processor frequency.
# This will define a symbol, F_CPU, in all source code files equal to the
# processor frequency. You can then use this symbol in your source code to
# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
# automatically to create a 32-bit value in your source code.
F_CPU = 8000000
# Output format. (can be srec, ihex, binary)
FORMAT = ihex
# Target file name (without extension).
TARGET = IO
# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c |
楼主
标题置顶
标题高亮
