uchar CH376FileOpen(uchar * name) /* 在根目录或者当前目录下打开文件或者目录(文件夹) */
{
/* 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));
}
/* 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 );
}
uchar CH376DiskMount(void) /* 初始化磁盘并测试磁盘是否就绪 */
{
return(CH376SendCmdWaitInt(CMD0H_DISK_MOUNT));
}
uchar CH376DiskConnect(void)/*检查U盘是否连接*/
{
if (Query376Interrupt( )) CH376GetIntStatus( ); /* 检测到中断 */
return(CH376SendCmdWaitInt(CMD0H_DISK_CONNECT));
}