/* 设置将要操作的文件的文件名 */ uchar c; xWriteCH376Cmd( CMD10_SET_FILE_NAME ); c = *name; xWriteCH376Data(c); while (c) { name++; c = *name; if (c == DEF_SEPAR_CHAR1 || c == DEF_SEPAR_CHAR2) c = 0; /* 强行将文件名截止 */ xWriteCH376Data(c); } if (name[0] == DEF_SEPAR_CHAR1 || name[0] == DEF_SEPAR_CHAR2) CH376WriteVar32( VAR_CURRENT_CLUST, 0 ); return(CH376SendCmdWaitInt(CMD0H_FILE_OPEN)); } #define CMD1H_FILE_CLOSE 0x36 /* 主机文件模式: 关闭当前已经打开的文件或者目录(文件夹) */ uchar CH376FileClose(uchar UpdateSz) /* 关闭当前已经打开的文件或者目录(文件夹) */ { xWriteCH376Cmd(CMD1H_FILE_CLOSE); xWriteCH376Data(UpdateSz); return(Wait376Interrupt()); } #define CMD01_RD_USB_DATA0 0x27 /* 从当前USB中断的端点缓冲区或者主机端点的接收缓冲区读取数据块 */ uchar CH376ReadBlock(uchar * buf) /* 从当前主机端点的接收缓冲区读取数据块,返回长度 */ { uchar s, l; xWriteCH376Cmd(CMD01_RD_USB_DATA0); s = l = xReadCH376Data( ); /* 长度 */ if(l) { do { *buf = xReadCH376Data( ); buf ++; } while ( -- l ); } return( s ); } #define CMD2H_BYTE_READ 0x3A /* 主机文件模式: 以字节为单位从当前位置读取数据块 */ #define USB_INT_DISK_READ 0x1D /* USB存储器请求数据读出 */ #define CMD0H_BYTE_RD_GO 0x3B /* 主机文件模式: 继续字节读 */ uchar CH376ByteRead(uchar * buf, uint ReqCount, uint * RealCount ) /* 以字节为单位从当前位置读取数据块 */ { uchar s; xWriteCH376Cmd(CMD2H_BYTE_READ); xWriteCH376Data((uchar)ReqCount); xWriteCH376Data((uchar)(ReqCount>>8)); if (RealCount) *RealCount = 0; while ( 1 ) { s = Wait376Interrupt( ); if (s == USB_INT_DISK_READ) { s = CH376ReadBlock(buf); /* 从当前主机端点的接收缓冲区读取数据块,返回长度 */ xWriteCH376Cmd(CMD0H_BYTE_RD_GO); buf += s; if (RealCount) *RealCount += s; } else return(s); /* 错误 */ } }
/* 其它BulkOnly传输协议的命令可以参考这个例子处理,修改前必须了解USB MassStorage和SCSI规范 */ UINT8 IsDiskWriteProtect( void ) { UINT8 s, SysBaseInfo; P_BULK_ONLY_CBW pCbw; SysBaseInfo = CH376ReadVar8( VAR_SYS_BASE_INFO ); /* 当前系统的基本信息 */ pCbw = (P_BULK_ONLY_CBW)buf; for ( s = 0; s != sizeof( pCbw -> CBW_CB_Buf ); s ++ ) pCbw -> CBW_CB_Buf[ s ] = 0; /* 默认清0 */ pCbw -> CBW_DataLen0 = 0x10; /* 数据传输长度 */ pCbw -> CBW_Flag = 0x80; /* 传输方向为输入 */ if ( SysBaseInfo & 0x40 ) { /* SubClass-Code子类别非6 */ pCbw -> CBW_CB_Len = 10; /* 命令块的长度 */ pCbw -> CBW_CB_Buf[0] = 0x5A; /* 命令块首字节, MODE SENSE(10) */ pCbw -> CBW_CB_Buf[2] = 0x3F; pCbw -> CBW_CB_Buf[8] = 0x10; } else { /* SubClass-Code子类别为6 */ pCbw -> CBW_CB_Len = 6; /* 命令块的长度 */ pCbw -> CBW_CB_Buf[0] = 0x1A; /* 命令块首字节, MODE SENSE(6) */ pCbw -> CBW_CB_Buf[2] = 0x3F; pCbw -> CBW_CB_Buf[4] = 0x10; } CH376WriteHostBlock( (PUINT8)pCbw, sizeof( BULK_ONLY_CBW ) ); /* 向USB主机端点的发送缓冲区写入数据块,剩余部分CH376自动填补 */ s = CH376SendCmdWaitInt( CMD0H_DISK_BOC_CMD ); /* 对U盘执行BulkOnly传输协议 */ if ( s == USB_INT_SUCCESS ) { s = CH376ReadBlock( buf ); /* 从当前主机端点的接收缓冲区读取数据块,返回长度 */ if ( s > 3 ) { /* MODE SENSE命令返回数据的长度有效 */ if ( SysBaseInfo & 0x40 ) s = buf[3]; /* MODE SENSE(10), device specific parameter */ else s = buf[2]; /* MODE SENSE(6), device specific parameter */ if ( s & 0x80 ) return( 0xFF ); /* U盘写保护 */ else return( USB_INT_SUCCESS ); /* U盘没有写保护 */ } return( USB_INT_DISK_ERR ); } CH376DiskReqSense( ); /* 检查USB存储器错误 */ return( s ); }
main( ) { UINT8 s; mDelaymS( 100 ); /* 延时100毫秒 */ mInitSTDIO( ); /* 为了让计算机通过串口监控演示过程 */ printf( "Start\n" ); s = mInitCH376Host( ); /* 初始化CH376 */ mStopIfError( s ); /* 其它电路初始化 */ while ( 1 ) { printf( "Wait Udisk\n" ); // while ( CH376DiskConnect( ) != USB_INT_SUCCESS ) { /* 检查U盘是否连接,等待U盘插入,对于SD卡,可以由单片机直接查询SD卡座的插拔状态引脚 */ // mDelaymS( 100 ); // } while ( 1 ) { /* 与前几行的方法不同,此处是等到中断通知后再查询USB设备连接 */ if ( Query376Interrupt( ) ) { /* 查询CH376中断(INT#引脚为低电平) */ if ( CH376DiskConnect( ) == USB_INT_SUCCESS ) break; /* USB设备连接 */ } mDelaymS( 100 ); } mDelaymS( 200 ); /* 延时,可选操作,有的USB存储器需要几十毫秒的延时 */ /* 对于检测到USB设备的,最多等待10*50mS */ for ( s = 0; s < 10; s ++ ) { /* 最长等待时间,10*50mS */ mDelaymS( 50 ); printf( "Ready ?\n" ); if ( CH376DiskMount( ) == USB_INT_SUCCESS ) break; /* 初始化磁盘并测试磁盘是否就绪 */ } s = CH376ReadBlock( buf ); /* 如果需要,可以读取数据块CH376_CMD_DATA.DiskMountInq,返回长度 */ if ( s == sizeof( INQUIRY_DATA ) ) { /* U盘的厂商和产品信息 */ buf[ s ] = 0; printf( "UdiskInfo: %s\n", ((P_INQUIRY_DATA)buf) -> VendorIdStr ); } printf( "Check Disk Write Protect ? ...\n" ); s = IsDiskWriteProtect( ); /* 检查U盘是否写保护, 返回USB_INT_SUCCESS说明可以写,返回0xFF说明只读/写保护,返回其它值说明是错误代码 */ if ( s != USB_INT_SUCCESS && s != 0xFF ) { /* 操作失败 */ printf( "Again ...\n" ); mDelaymS( 100 ); s = IsDiskWriteProtect( ); /* 再试一次 */ } if ( s == USB_INT_SUCCESS ) { /* 可以写 */ printf( "... No !\n" ); printf( "Create a File\n" ); s = CH376FileCreate( "\\NEWFILE.TXT" ); /* 在根目录下新建文件并打开,如果文件已经存在则先删除后再新建 */ mStopIfError( s ); buf[0] = 'O'; buf[1] = 'K'; s = CH376ByteWrite( buf, 2, NULL ); /* 向文件写入数据 */ mStopIfError( s ); printf( "Close\n" ); s = CH376FileClose( TRUE ); /* 自动计算文件长度 */ mStopIfError( s ); if ( SafeRemoveDisk( ) == USB_INT_SUCCESS ) { /* 安全移除U盘 */ printf( "Safe Remove !\n" ); } else { printf( "Unsafe Remove !\n" ); } } else if ( s == 0xFF ) { /* 写保护 */ printf( "... Yes !\n" ); } else { mStopIfError( s ); /* 显示错误代码 */ } printf( "Take out\n" ); // while ( CH376DiskConnect( ) == USB_INT_SUCCESS ) { /* 检查U盘是否连接,等待U盘拔出 */ // mDelaymS( 100 ); // } while ( 1 ) { /* 与前几行的方法不同,此处是等到中断通知后再查询USB设备连接 */ if ( Query376Interrupt( ) ) { /* 查询CH376中断(INT#引脚为低电平) */ if ( CH376DiskConnect( ) != USB_INT_SUCCESS ) break; /* USB设备断开 */ } mDelaymS( 100 ); } mDelaymS( 200 ); } }
void host( ) { UINT8 i, s; UINT8 TotalCount; UINT16 RealCount; P_FAT_DIR_INFO pDir; s = mInitCH376Host( ); /* 初始化CH376 */ mStopIfError( s ); /* 其它电路初始化 */ while ( 1 ) { printf( "Wait Udisk/SD\n" ); while ( CH376DiskConnect( ) != USB_INT_SUCCESS ) { /* 检查U盘是否连接,等待U盘插入,对于SD卡,可以由单片机直接查询SD卡座的插拔状态引脚 */ if ( IsKeyPress( ) ) { /* 有键按下 */ printf( "Exit USB host mode\n" ); return; } mDelaymS( 100 ); /* 没必要频繁查询 */ } LED_UDISK_IN( ); /* LED亮 */ mDelaymS( 200 ); /* 延时,可选操作,有的USB存储器需要几十毫秒的延时 */ /* 对于检测到USB设备的,最多等待100*50mS,主要针对有些MP3太慢,对于检测到USB设备并且连接DISK_MOUNTED的,最多等待5*50mS,主要针对DiskReady不过的 */ for ( i = 0; i < 100; i ++ ) { /* 最长等待时间,100*50mS */ mDelaymS( 50 ); printf( "Ready ?\n" ); s = CH376DiskMount( ); /* 初始化磁盘并测试磁盘是否就绪 */ if ( s == USB_INT_SUCCESS ) break; /* 准备好 */ else if ( s == ERR_DISK_DISCON ) break; /* 检测到断开,重新检测并计时 */ if ( CH376GetDiskStatus( ) >= DEF_DISK_MOUNTED && i >= 5 ) break; /* 有的U盘总是返回未准备好,不过可以忽略,只要其建立连接MOUNTED且尝试5*50mS */ } if ( s == ERR_DISK_DISCON ) { /* 检测到断开,重新检测并计时 */ printf( "Device gone\n" ); continue; } if ( CH376GetDiskStatus( ) < DEF_DISK_MOUNTED ) { /* 未知USB设备,例如USB键盘、打印机等 */ printf( "Unknown device\n" ); goto UnknownUsbDevice; } i = CH376ReadBlock( buf ); /* 如果需要,可以读取数据块CH376_CMD_DATA.DiskMountInq,返回长度 */ if ( i == sizeof( INQUIRY_DATA ) ) { /* U盘的厂商和产品信息 */ buf[ i ] = 0; printf( "UdiskInfo: %s\n", ((P_INQUIRY_DATA)buf) -> VendorIdStr ); } /* 读取原文件 */ printf( "Open\n" ); strcpy( buf, "\\C51\\CH376HFT.C" ); /* 源文件名,多级目录下的文件名和路径名必须复制到RAM中再处理,而根目录或者当前目录下的文件名可以在RAM或者ROM中 */ s = CH376FileOpenPath( buf ); /* 打开文件,该文件在C51子目录下 */ if ( s == ERR_MISS_DIR || s == ERR_MISS_FILE ) { /* 没有找到目录或者没有找到文件 */ /* 列出文件,完整枚举可以参考EXAM13全盘枚举 */ if ( s == ERR_MISS_DIR ) strcpy( buf, "\\*" ); /* C51子目录不存在则列出根目录下的文件 */ else strcpy( buf, "\\C51\\CH376*" ); /* CH376HFT.C文件不存在则列出\C51子目录下的以CH376开头的文件 */ printf( "List file %s\n", buf ); s = CH376FileOpenPath( buf ); /* 枚举多级目录下的文件或者目录,输入缓冲区必须在RAM中 */ while ( s == USB_INT_DISK_READ ) { /* 枚举到匹配的文件 */ CH376ReadBlock( buf ); /* 读取枚举到的文件的FAT_DIR_INFO结构,返回长度总是sizeof( FAT_DIR_INFO ) */ pDir = (P_FAT_DIR_INFO)buf; /* 当前文件目录信息 */ if ( pDir -> DIR_Name[0] != '.' ) { /* 不是本级或者上级目录名则继续,否则必须丢弃不处理 */ if ( pDir -> DIR_Name[0] == 0x05 ) pDir -> DIR_Name[0] = 0xE5; /* 特殊字符替换 */ pDir -> DIR_Attr = 0; /* 强制文件名字符串结束以便打印输出 */ printf( "*** EnumName: %s\n", pDir -> DIR_Name ); /* 打印名称,原始8+3格式,未整理成含小数点分隔符 */ } xWriteCH376Cmd( CMD0H_FILE_ENUM_GO ); /* 继续枚举文件和目录 */ xEndCH376Cmd( ); s = Wait376Interrupt( ); } if ( s != ERR_MISS_FILE ) mStopIfError( s ); /* 操作出错 */ } else { /* 找到文件或者出错 */ mStopIfError( s ); TotalCount = 200; /* 准备读取总长度 */ printf( "从文件中读出的前%d个字符是:\n",(UINT16)TotalCount ); while ( TotalCount ) { /* 如果文件比较大,一次读不完,可以再调用CH376ByteRead继续读取,文件指针自动向后移动 */ if ( TotalCount > sizeof(buf) ) i = sizeof(buf); /* 剩余数据较多,限制单次读写的长度不能超过缓冲区大小 */ else i = TotalCount; /* 最后剩余的字节数 */ s = CH376ByteRead( buf, i, &RealCount ); /* 以字节为单位读取数据块,单次读写的长度不能超过缓冲区大小,第二次调用时接着刚才的向后读 */ mStopIfError( s ); TotalCount -= (UINT8)RealCount; /* 计数,减去当前实际已经读出的字符数 */ for ( s=0; s!=RealCount; s++ ) printf( "%C", buf[s] ); /* 显示读出的字符 */ if ( RealCount < i ) { /* 实际读出的字符数少于要求读出的字符数,说明已经到文件的结尾 */ printf( "\n" ); printf( "文件已经结束\n" ); break; } } printf( "Close\n" ); s = CH376FileClose( FALSE ); /* 关闭文件 */ mStopIfError( s ); } UnknownUsbDevice: printf( "Take out\n" ); while ( CH376DiskConnect( ) == USB_INT_SUCCESS ) { /* 检查U盘是否连接,等待U盘拔出 */ mDelaymS( 100 ); } LED_UDISK_OUT( ); /* LED灭 */ mDelaymS( 100 ); } }
//***************************************************************************** // //! \brief CH376 test execute main body. //! //! \return None. // //***************************************************************************** static void CH376Execute(void) { unsigned char s; UINT16 usDataCnt; unsigned int ulFileSize, ulSetcorCnt; //waiting for USB device get ready for ( s = 0; s < 10; s ++ ) { mDelaymS( 50 ); printf( "Ready ?\n\r" ); // // Initialize disk and check if disk is ready // if ( CH376DiskMount( ) == USB_INT_SUCCESS ) break; } s = CH376ReadBlock( ucReadData ); TestAssert((s == sizeof( INQUIRY_DATA )), "CH376 API \"CH376ReadBlock()\"error!"); if ( s == sizeof( INQUIRY_DATA ) ) { // // get device information // ucReadData[ s ] = 0; printf( "UdiskInfo: %s\n\r", ((P_INQUIRY_DATA)ucReadData)->VendorIdStr); } s = CH376DiskCapacity(&ulSetcorCnt); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376DiskCapacity()\"error!"); printf("Capacity of U-disk: %dMB\n\r", ulSetcorCnt / (1048576 / DEF_SECTOR_SIZE)); s = CH376DiskQuery(&ulSetcorCnt); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376DiskCapacity()\"error!"); printf("Available capacity: %dMB\n\r", ulSetcorCnt / (1048576 / DEF_SECTOR_SIZE)); s = CH376FileOpenPath("/CH376TST/TST.TXT"); if ( s != USB_INT_SUCCESS ) { // // if file path not found, firstly create the folder then create the file // s = CH376DirCreate("/CH376TST"); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376DirCreate()\"error!"); s = CH376FileCreate("TST.TXT"); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376FileCreate()\"error!"); s = CH376ByteWrite(ucWriteData, 35, &usDataCnt); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376ByteWrite()\"error!"); // // After modifying a file, the parameter of CH376FileClose() must be TRUE to update // file size or you will find the file not available when you open the file on computer. // CH376FileClose(TRUE); } else { // // if file found, move file pointer to the end of file, then append data to the file // CH376ByteLocate(0x0); s = CH376ByteWrite(ucWriteData, 35, &usDataCnt); TestAssert((s == USB_INT_SUCCESS), "CH376 API \"CH376ByteWrite()\"error!"); // // enable auto update file size // CH376FileClose(TRUE); } CH376FileOpenPath("/CH376TST/TST.TXT"); ulFileSize = CH376GetFileSize(); CH376ByteRead(ucReadData, 512, &usDataCnt); for(s = 0; s < ulFileSize; s++) { TestAssert((ucReadData[s] == ucWriteData[s]), "CH376 API \"CH376ByteRead()\"error!"); } CH376FileClose(FALSE); printf("\n\r All test over!\n\r"); }