救急啊！！！
本帖最后由 454234682 于 2012-10-5 10:38 编辑我用AVR-GCC编译程序，老是出现这个问题，解决不了哇，在线等！！！！！谢谢大侠
老是出现\M16-GCC例程\lcd12864/main.c:16: undefined reference to `LCD_Init'
可是我已将包含了#include "lcd12864.h"
下面lcd12864.h文件
#ifndef _LCD12864_H_
#define _LCD12864_H_
#include <avr/io.h>
#define LCD12864_CSPORTA=(1<<7)
#define LCD12864_SID PORTA=(1<<6)
#define LCD12864_SCK PORTA=(1<<5)
#define uchar unsigned char
#define uint unsigned int
void LCD_Init(void);//液晶初始化
uchar LCD_ReceiveByte(void);
void LCD_CheckBusy(void);//判断液晶是否忙
void LCD_WriteCommand(uchar Cbyte);//写指令
void LCD_WriteData(uchar Dbyte);//写数据
uchar LCD_ReadData(void);
void LCD_DisplayChinese(uchar Addr,uchar *p);//显示中文或字符串
void LCD_DisplayNumber(uchar Addr,int num);//显示数字
void LCD_DisplayCLR(void); //(开机消除噪点)
#endif
难道是Makfile没有包含.C文件？有人知道怎么弄嘛？
这样写对不对啊？
# Target file name (without extension).
TARGET = main
# Object files directory
# To put object files in current directory, use a dot (.), do NOT make
# this an empty or blank macro!
OBJDIR = .
# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c
SRC = lcd12864.c
# List C++ source files here. (C dependencies are automatically generated.)
CPPSRC =
# List Assembler source files here.
# Make them always end in a capital .S.Files ending in a lowercase .s
# will not be considered source files but generated files (assembler
# output from the compiler), and will be deleted upon "make clean"!
# Even though the DOS/Win* filesystem matches both .s and .S the same,
# it will preserve the spelling of the filenames, and gcc itself does
# care about how the name is spelled on its command-line.
ASRC =
# Optimization level, can be . 加个extern试试 建义直接把整个工程上传(当然了，可以把一些认为是重要文件去掉 加个extern试试
加过也试过，不行啊 不要用中文路径 我是新手，不知道这里对不对
#define LCD12864_CSPORTA=(1<<7)
#define LCD12864_SID PORTA=(1<<6)
#define LCD12864_SCK PORTA=(1<<5)
在main.c里写个#include "LCD12864.C"试试 lcw_swust 发表于 2012-10-5 10:32 static/image/common/back.gif
在main.c里写个#include "LCD12864.C"试试
好的，我试试 trave_yang 发表于 2012-10-5 10:14 static/image/common/back.gif
加个extern试试
加过也试过，不行啊 .titrwh 发表于 2012-10-5 10:24 static/image/common/back.gif
不要用中文路径 ...
好的，马上试试 文件名换小写的，大写的会有问题 454234682 发表于 2012-10-5 10:24 static/image/common/back.gif
我是新手，不知道这里对不对
#define LCD12864_CSPORTA=(1
应改成PORTA|=(1<<7)；
不然按你的操作，每操作一个引脚会置零另外的引脚。
如果你想让avr的引脚输出高低电平，应该这样定义
#define LCD1286_CS_1 PORTA|=(1<<PA7);
#define LCD1286_CS_0 PORTA&=~(1<<PA7)‘ 把H文件改成小写.h试试，还有Makefile里
SRC = $(TARGET).c
SRC = lcd12864.c
改成SRC = $(TARGET).c lcd12864.c
或者
SRC = $(TARGET).c
SRC+ = lcd12864.c
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