/* 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");
}
