程序从a.txt中读取一串数据，假如是 Hello，the world！将读的数据存放到DATA_BUF中，再将DATA_BUF中的数据写入创建的文件NEWFILE.txt中，在电脑上打开此文件，看到的却是乱码。我始终弄不明白这是为什么，请各位各位哥哥姐姐们帮帮忙啊！

我的程序如下： #include #include #include #include

#define MAX_PATH_LEN 32 #include "CH375HM.H"

/* 电路连接方式 单片机 模块 P0 = D0-D7 RD = RD# WR = WR# P26 = CS# P20 = A0 P15 = STA# INT0 = INT# */ #define CH375HM_INDEX XBYTE[0xBCF0]/* CH375模块的索引端口的I/O地址 */ #define CH375HM_DATA XBYTE[0xBDF1]/* CH375模块的数据端口的I/O地址 */ #define CH375HM_INT_WIRE INT0 /* CH375模块的INT#引脚连接到单片机的INT0引脚 */ sbit P15 = P1^5; #define CH375HM_STA P15 /* CH375模块的STA#引脚连接到单片机的P15引脚 */

/* 文件数据缓冲区: ExtRAM: 0000H-7FFFH */ unsigned char xdata DATA_BUF[ 512 * 64 ] _at_ 0x0000;

CMD_PARAM mCmdParam; unsigned char mIntStatus; /* CH375模块的中断状态或者操作完成状态 */

sbit LED_OUT0 = P1^0; sbit LED_OUT1 = P1^1;

sbit KEY = P1^3;

#define CH375HM_INDEX_WR( Index ) { CH375HM_INDEX = (Index); } /* 写索引地址 */ #define CH375HM_DATA_WR( Data ) { CH375HM_DATA = (Data); } /* 写数据 */ #define CH375HM_DATA_RD( ) ( CH375HM_DATA ) /* 读数据 */

void mDelaymS( unsigned char delay ) { unsigned char i, j, c; for ( i = delay; i != 0; i -- ) { for ( j = 200; j != 0; j -- ) c += 3; for ( j = 200; j != 0; j -- ) c += 3; } }

void mPressKey() { while ( 1 == KEY ) { LED_OUT0 = 0; LED_OUT1 = 1; mDelaymS(500); LED_OUT0 = 1; LED_OUT1 = 0; mDelaymS(500); } mDelaymS(200); KEY = 1; mDelaymS(200); LED_OUT0 = 0; mDelaymS(200); LED_OUT1 = 1; }

/* 执行命令 */ unsigned char ExecCommandBuf( unsigned char cmd, unsigned char len, unsigned ar xdata *bufstart ) { unsigned char i, status; #define DataCount status unsigned char data *buf; unsigned char xdata *CurrentBuf; CH375HM_INDEX_WR( 0 ); /* 索引地址置0 */ CH375HM_DATA_WR( cmd ); /* 向索引地址0写入命令码 */ CH375HM_DATA_WR( len ); /* 向索引地址1写入后续参数的长度 */ if ( len ) /* 有参数 */ { i = len; buf = (unsigned char *)&mCmdParam; /* 指向输入参数的起始地址 */ do { CH375HM_DATA_WR( *buf ); /* 从索引地址2开始,写入参数 */ buf ++; } while ( -- i ); } CH375HM_STA = 0; /* 产生下降沿通知模块,说明命令包已经写入,请求开始执行命令 */ CurrentBuf = bufstart; while ( 1 ) /* 处理数据传输,直到操作完成才退出 */ { while ( CH375HM_INT_WIRE ); CH375HM_INDEX_WR( 63 ); status = CH375HM_DATA_RD( ); CH375HM_STA = 1; /* 中断应答,取消来自模块的中断请求 */ if ( status == ERR_SUCCESS ) /* 操作成功 */ { CH375HM_INDEX_WR( 1 ); DataCount = CH375HM_DATA_RD( ); /* 从索引地址1读取返回结果数据的长度,计数 */ if ( DataCount ) /* 有结果数据 */ { buf = (unsigned char *)&mCmdParam; /* 指向输出参数的起始地址 */ i = 2; do { CH375HM_INDEX_WR( i ); i ++; *buf = CH375HM_DATA_RD( ); /* 从索引地址2开始,读取结果 */ buf ++; } while ( -- DataCount ); } break; /* 操作成功返回 */ } else if ( status == USB_INT_DISK_READ ) { /* 正在从U盘读数据块,请求数据读出 */ DataCount = 64; /* 计数 */ i = 0; do { CH375HM_INDEX_WR( i ); i ++; *CurrentBuf = CH375HM_DATA_RD( ); /* 从索引地址0到63依次读出64字节的数据 */ CurrentBuf ++; /* 读取的数据保存到外部缓冲区 */ } while ( -- DataCount ); CH375HM_STA = 0; /* 产生下降沿通知模块继续,说明64字节数据已经读取完成 */ } else if ( status == USB_INT_DISK_WRITE ) /* 正在向U盘写数据块,请求数据写入 */ { CH375HM_INDEX_WR( 0 ); i = 64; do { CH375HM_DATA_WR( *CurrentBuf ); /* 向索引地址0到63依次写入64字节的数据 */ CurrentBuf ++; /* 写入的数据来自外部缓冲区 */ } while ( -- i ); CH375HM_STA = 0; /* 产生下降沿通知模块继续,说明64字节数据已经写入完成 */ } else if ( status == USB_INT_DISK_RETRY ) /* 读写数据块失败重试,应该向回修改缓冲区指针 */ { CH375HM_INDEX_WR( 0 ); i = CH375HM_DATA_RD( ); CH375HM_INDEX_WR( 1 ); DataCount = CH375HM_DATA_RD( ); CurrentBuf -= ( (unsigned short)i << 8 ) + DataCount; CH375HM_STA = 0; /* 产生下降沿通知模块继续,说明重试状态码已经处理完成 */ } else { /* 操作失败 */ if ( status == ERR_DISK_DISCON || status == ERR_USB_CONNECT ) mDelaymS( 100 ); /* U盘刚刚连接或者断开,应该延时几十毫秒再操作 */ break; /* 操作失败返回 */ } }

return( status ); }

/* 执行命令 */ unsigned char ExecCommand( unsigned char cmd, unsigned char len ) { return( ExecCommandBuf( cmd, len, 0 ) ); }

void mStopIfError( unsigned char iError ) { unsigned char led; if ( iError == ERR_SUCCESS ) return; /* 操作成功 */ led=0; while ( 1 ) { LED_OUT0 = led&1; /* LED闪烁 */ mDelaymS( 1000 ); led^=1; } }

/* 为printf和getkey输入输出初始化串口 */ void mInitSTDIO( ) { SCON = 0x50; //串口控制寄存器串口模式为1,8位UART,允许接收 PCON = 0x00; //电源控制寄存器 SMOD1=0 波特率为振荡器的/64 TMOD = 0x20; //定时器的模式控制位 使用定时器1定时，采用8位自载定时器， TH1 = 0xFD; TL1 = 0xFD; //11.0529MHz晶振, 9600 bps TR1 = 1; //定时器运行 TI = 1; //发送中断标志位

mDelaymS(200); LED_OUT0 = 1; mDelaymS(200); LED_OUT1 = 1; mDelaymS(200); KEY = 1; mDelaymS(200); }

void main( ) { unsigned char i, c, SecCount; unsigned long OldSize; unsigned short NewSize; LED_OUT0 = 0; /* 开机后LED亮一下以示工作 */ mDelaymS( 1000 ); LED_OUT0 = 1; mInitSTDIO( );

while ( 1 ) /* 主循环 */ { /* 使用查询方式看U盘是否连接 */ while ( 1 ) { i = ExecCommand( CMD_QueryStatus, 0 ); mStopIfError( i ); if ( mCmdParam.Status.mDiskStatus >= DISK_CONNECT ) break; /* U盘已经连接 */ mDelaymS( 1000 ); } mDelaymS( 1000 ); LED_OUT0 = 0; /* LED亮 */ while ( ExecCommand( CMD_DiskReady, 0 ) != ERR_SUCCESS ) { mDelaymS( 1000 ); /* 查询磁盘是否准备好 */ }

mPressKey(); mDelaymS(5000);

/* 读取原文件 */ memcpy( mCmdParam.Open.mPathName, "\\A.TXT", MAX_PATH_LEN ); i = ExecCommand( CMD_FileOpen, MAX_PATH_LEN ); if ( i == ERR_MISS_DIR || i == ERR_MISS_FILE ) { for ( c = 0; c < 255; c ++ ) { /* 最多搜索前255个文件 */ memcpy( mCmdParam.Enumer.mPathName, "\\*", MAX_PATH_LEN ); /* 搜索文件名,*为通配符,适用于所有文件或者子目录 */ for ( i = 0; i < MAX_PATH_LEN - 1; i ++ ) if ( mCmdParam.Enumer.mPathName[ i ] == 0 ) break; /* 指向搜索文件名的结束符 */ mCmdParam.Enumer.mPathName[ i ] = c; /* 将结束符替换为搜索的序号,从0到255 */ i = ExecCommand( CMD_FileEnumer, i+1 ); /* 枚举文件,如果文件名中含有通配符*,则为搜索文件而不打开,输入参数的长度很好计算 */ if ( i == ERR_MISS_FILE ) break; /* 再也搜索不到匹配的文件,已经没有匹配的文件名 */ if ( i == ERR_SUCCESS ) { /* 搜索到与通配符相匹配的文件名,文件名及其完整路径在命令缓冲区中 */ continue; /* 继续搜索下一个匹配的文件名,下次搜索时序号会加1 */ } else { /* 出错 */ mStopIfError( i ); break; } } strcpy( DATA_BUF, "Note: \xd\n没找到文件！\xd\n" ); OldSize = 0; NewSize = strlen( DATA_BUF ); SecCount = ( NewSize + 511 ) >> 9; } else { /* 找到文件或者出错 */ mStopIfError( i ); i = ExecCommand( CMD_FileQuery, 0 ); /* 查询当前文件的信息,没有输入参数 */ mStopIfError( i ); OldSize = mCmdParam.Modify.mFileSize; if ( OldSize > (unsigned long)(64*512) ) { SecCount = 64; NewSize = 64*512; } else { SecCount = ( OldSize + 511 ) >> 9; NewSize = (unsigned short)OldSize; } mCmdParam.Read.mSectorCount = SecCount; /* 读取全部数据 */ i = ExecCo

你写进去的是什么数据，16进制的数据还是ASCII码？文本文件在计算机上面现实是以ASCII码的形式显示的啊

我写进去的是ASCII码，比如 Microcomputer quoted an electronic technology is developing rapidly, LSI articularly the creation of the miniature machine, modern scientific research is a qualitative leap, and embedded micro-controller technology is the emergence of modern industrial control along with a new technological revolution. By embedded micro-controller system, the most obvious advantage is that can be embedded into any micro or small apparatus, equipment. Embedded this term is becoming more and more popular, But many of the concepts may have a majority of people are not very clear, in this paper, We are not pursuing the concept of specific accuracy, but may have an accurate understanding. Embedded systems are different from the common computer system, a computer system, it does not separate equipment to the physical form of, It is not a uniform appearance, its components and equipment according to the main application needs embedded in the internal equipment. play an operator, handling, storage and control. From a structural point of view system, embedded system is mainly embedded processor, supporting hardware and embedded software. Which is normally embedded MCU processor or microcontroller; Hardware support including storage media.

程序上面没什么问题,实际在你写数据的时候,你这些数据到要以字符串的格式放到DATA_BUF里面去才可以