📄 ch375.c
字号:
/* 2004.03.05
****************************************
** **
** **
****************************************
** USB 1.1 Host Examples for CH375 **
** KC7.0@MCS-51 **
****************************************
*/
/* CH375作为USB主机接口的程序示例 */
/* MCS-51单片机C语言的示例程序, U盘数据读写 */
#include "common.h"
unsigned char volatile xdata CH375_CMD_PORT _at_ 0xBDF1; /* CH375命令端口的I/O地址 */
unsigned char volatile xdata CH375_DAT_PORT _at_ 0xBCF0; /* CH375数据端口的I/O地址 */
extern unsigned char xdata DBUF[BUFFER_LENGTH];
//sbit LED_OUT = 0x90^4; /* P1.4 低电平驱动LED显示,用于监控演示程序的进度 */
sbit CH375_INT_WIRE = 0xB0^2; /* P3.2, INT0, 连接CH375的INT#引脚,用于查询中断状态 */
#define mDelay1uS( ) /* 对于MCS51单片机,通常不需要1uS延时 */
/* 延时2微秒,请根据单片机速度 */
//void mDelay1uS( )
//{
// unsigned char i;
// for ( i = 1; i != 0; i -- );
//}
/* 延时2微秒,请根据单片机速度 */
void mDelay2uS( )
{
unsigned char i;
for ( i = 2; i != 0; i -- );
}
/* 向CH375命令端口写命令数据 */
void CH375_CMD_PORT_d_out( INT8 d_out )
{
mDelay1uS( );
CH375_CMD_PORT=d_out;
mDelay2uS( ); /* 至少延时2uS */
}
/* 向CH375数据端口写数据 */
void CH375_DAT_PORT_d_out( INT8 d_out )
{
CH375_DAT_PORT=d_out;
mDelay1uS( );
}
/* 从CH375命令端口读数据 */
INT8 CH375_DAT_PORT_in( )
{
mDelay1uS( );
return( CH375_DAT_PORT );
}
/* 延时毫秒,不精确 */
void DelayMs(unsigned char nFactor)
{
unsigned char i;
unsigned int j;
for(i=0; i<nFactor; i++) for(j=0;j<1000;j++) j=j;
}
/* 等待CH375中断并获取状态 */
unsigned char mWaitInterrupt( )
{
unsigned char c;
while ( CH375_INT_WIRE ); /* 如果CH375的中断引脚输出高电平则等待 */
CH375_CMD_PORT_d_out( CMD_GET_STATUS); /* 获取当前中断状态 */
c = CH375_DAT_PORT_in(); /* 返回中断状态 */
/* if ( c == USB_INT_DISCONNECT ) /* 检测到USB设备断开事件 */
/* else if ( c == USB_INT_CONNECT ) /* 检测到USB设备连接事件 */
return( c );
}
/* 设置CH375为USB主机方式 */
unsigned char mCH375Init( )
{
unsigned char i;
#ifdef TEST_CH375_PORT
unsigned char c;
CH375_CMD_PORT_d_out(CMD_CHECK_EXIST); /* 测试工作状态 */
CH375_DAT_PORT_d_out( 0x55); /* 测试数据 */
c = CH375_DAT_PORT_in(); /* 返回数据应该是测试数据取反 */
if ( c != 0xaa ) { /* CH375出错 */
for ( i = 100; i != 0; i -- ) { /* 强制数据同步 */
CH375_CMD_PORT_d_out( CMD_RESET_ALL ); /* CH375执行硬件复位 */
c = CH375_DAT_PORT_in(); /* 延时 */
}
DelayMs( 50 ); /* 延时至少30mS */
}
#endif
CH375_CMD_PORT_d_out( CMD_SET_USB_MODE); /* 设置USB工作模式 */
CH375_DAT_PORT_d_out( 6); /* 模式代码,自动检测USB设备连接 */
for ( i = 0xff; i != 0; i -- ) { /* 等待操作成功,通常需要等待10uS-20uS */
if ( CH375_DAT_PORT_in() == CMD_RET_SUCCESS ) break; /* 操作成功 */
}
if ( i != 0 ) return( 0 ); /* 操作成功 */
else return( 0xff ); /* CH375出错,例如芯片型号错或者处于串口方式或者不支持 */
}
/* 初始化磁盘 */
unsigned char mInitDisk( )
{
unsigned char mIntStatus;
CH375_CMD_PORT_d_out( CMD_DISK_INIT); /* 初始化USB存储器 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
//if ( mIntStatus == USB_INT_SUCCESS ) return( 0 ); /* U盘已经成功初始化 */
return mIntStatus ; /* 出现错误 */
}
unsigned char ReadCapacity(void)
{
unsigned char *mBufferPoint;
unsigned char mIntStatus,mLength;
CH375_CMD_PORT_d_out( CMD_DISK_SIZE); /* 读取容量 */
mBufferPoint=DBUF;
mIntStatus = mWaitInterrupt( );
if ( mIntStatus == USB_INT_DISK_READ )
{ /* USB存储器读数据块,请求数据读出 */
CH375_CMD_PORT_d_out( CMD_RD_USB_DATA); /* 从CH375缓冲区读取数据块 */
mLength = CH375_DAT_PORT_in(); /* 后续数据的长度 */
while ( mLength ) { /* 根据长度读取数据 */
*mBufferPoint = CH375_DAT_PORT_in(); /* 读出数据并保存 */
mBufferPoint ++;
mLength --;
}
return 1;
}
}
unsigned long SwapINT32(unsigned long dData)
{
dData = (dData&0xff)<<24|(dData&0xff00)<<8|(dData&0xff000000)>>24|(dData&0xff0000)>>8;
return dData;
}
unsigned int SwapINT16(unsigned int dData)
{
dData = (dData&0xff00)>>8|(dData&0x00ff)<<8;
return dData;
}
/* 从U盘中读取多个扇区的数据块到缓冲区中 */
unsigned char RBC_Read(unsigned long iLbaStart, unsigned char iSectorCount,unsigned char *mBufferPoint)
/* iLbaStart 是读取的线起始性扇区号, iSectorCount 是读取的扇区数 */
{
unsigned char mIntStatus;
unsigned int mBlockCount;
unsigned char mLength;
CH375_CMD_PORT_d_out(CMD_DISK_READ); /* 从USB存储器读数据块 */
CH375_DAT_PORT_d_out((unsigned char)iLbaStart); /* LBA的最低8位 */
CH375_DAT_PORT_d_out ((unsigned char)( iLbaStart >> 8 ));
CH375_DAT_PORT_d_out((unsigned char)( iLbaStart >> 16 ));
CH375_DAT_PORT_d_out((unsigned char)( iLbaStart >> 24 )); /* LBA的最高8位 */
CH375_DAT_PORT_d_out( iSectorCount); /* 扇区数 */
// mBufferPoint = &DATA_BUFFER; /* 指向缓冲区起始地址 */
for ( mBlockCount = iSectorCount * CH375_BLK_PER_SEC; mBlockCount != 0; mBlockCount -- ) { /* 数据块计数 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_DISK_READ ) { /* USB存储器读数据块,请求数据读出 */
CH375_CMD_PORT_d_out(CMD_RD_USB_DATA); /* 从CH375缓冲区读取数据块 */
mLength = CH375_DAT_PORT_in(); /* 后续数据的长度 */
/* 通常数据长度是64,有些U盘要求单片机必须在2mS之内取走64字节数据,否则U盘可能数据丢失 */
/* 建议优化下面的循环程序,确保单片机在1mS之内完成64字节的数据传输 */
if ( mLength ) { /* 根据长度读取数据 */
do { // 对于C51,这个DO+WHILE结构效率高,速度快
*mBufferPoint = CH375_DAT_PORT_in(); /* 读出数据并保存 */
mBufferPoint ++;
} while ( -- mLength );
}
CH375_CMD_PORT_d_out( CMD_DISK_RD_GO); /* 继续执行USB存储器的读操作 */
}
else break; /* 返回错误状态 */
}
if ( mBlockCount == 0 ) mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_SUCCESS ) return 1; /* 操作成功 */
else return 0; /* 操作失败 */
}
/* 将缓冲区中的多个扇区的数据块写入U盘 */
unsigned char RBC_Write( unsigned long iLbaStart, unsigned char iSectorCount,unsigned char *mBufferPoint )
/* iLbaStart 是写入的线起始性扇区号, iSectorCount 是写入的扇区数 */
{
unsigned char mIntStatus;
unsigned int mBlockCount;
unsigned char mLength;
CH375_CMD_PORT_d_out( CMD_DISK_WRITE); /* 向USB存储器写数据块 */
CH375_DAT_PORT_d_out((unsigned char)iLbaStart); /* LBA的最低8位 */
CH375_DAT_PORT_d_out((unsigned char)( iLbaStart >> 8 ));
CH375_DAT_PORT_d_out((unsigned char)( iLbaStart >> 16 ));
CH375_DAT_PORT_d_out((unsigned char)( iLbaStart >> 24 )); /* LBA的最高8位 */
CH375_DAT_PORT_d_out(iSectorCount); /* 扇区数 */
//mBufferPoint = &DATA_BUFFER; /* 指向缓冲区起始地址 */
for ( mBlockCount = iSectorCount * CH375_BLK_PER_SEC; mBlockCount != 0; mBlockCount -- ) { /* 数据块计数 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_DISK_WRITE ) { /* USB存储器写数据块,请求数据写入 */
CH375_CMD_PORT_d_out( CMD_WR_USB_DATA7); /* 向CH375缓冲区写入数据块 */
mLength = CH375_BLOCK_SIZE;
CH375_DAT_PORT_d_out(mLength); /* 后续数据的长度 */
/* 通常数据长度是64,有些U盘要求单片机必须在2mS之内写入64字节数据,否则U盘可能数据丢失 */
/* 建议优化下面的循环程序,确保单片机在1mS之内完成64字节的数据传输 */
do { // 对于C51,这个DO+WHILE结构效率高,速度快
CH375_DAT_PORT_d_out(*mBufferPoint); /* 将数据写入 */
mBufferPoint ++;
} while ( -- mLength );
CH375_CMD_PORT_d_out( CMD_DISK_WR_GO); /* 继续执行USB存储器的写操作 */
}
else break; /* 返回错误状态 */
}
if ( mBlockCount == 0 ) mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_SUCCESS ) return 1; /* 操作成功 */
else return 0; /* 操作失败 */
}
INT8 mCH375Read( INT8 mAddr )
{
CH375_CMD_PORT_d_out( 0x0A );
CH375_DAT_PORT_d_out( mAddr );
if ( mAddr ) return( CH375_DAT_PORT_in( ) );
else return( 0 );
}
void mCH375Write( INT8 mAddr, INT8 mData )
{
CH375_CMD_PORT_d_out( 0x0B );
CH375_DAT_PORT_d_out( mAddr );
CH375_DAT_PORT_d_out( mData );
}
INT8 epBulkSend( INT8 *mBuffer, INT8 mLength )
{
unsigned char mBulkOut;
unsigned char CH375IntStatus;
CH375_CMD_PORT_d_out( CMD_WR_USB_DATA7 ); /* 向CH375的端点缓冲区写入准备发送的数据 */
CH375_DAT_PORT_d_out( mLength ); /* 后续数据长度4 */
while( mLength ) {
CH375_DAT_PORT_d_out( *mBuffer );
mBuffer ++;
mLength --;
}
mCH375Write( SFR_USB_H_ENDP, mCH375Read( VAR_UDISK_TOGGLE ) );
mBulkOut = mCH375Read( VAR_UDISK_BULK_OUT );
CH375IntStatus = 0; /* 清操作完成的中断状态 */
CH375_CMD_PORT_d_out( CMD_ISSUE_TOKEN );
CH375_DAT_PORT_d_out( mBulkOut ); /* 高4位目的端点号, 低4位令牌PID */
// if ( CH375LibConfig & 0x80 ) while ( CH375IntStatus == 0 ); /* 中断方式,等待数据传输操作 */
// else xQueryInterrupt( ); /* 查询方式,查询中断状态 */
CH375IntStatus=mWaitInterrupt( );
if ( CH375IntStatus == USB_INT_SUCCESS ) { /* 操作成功 */
mCH375Write( VAR_UDISK_TOGGLE, mCH375Read( VAR_UDISK_TOGGLE ) ^ 0x40 );//printf("mUsbBulksend success\n ");
return 1;
}
else return 0; /* 操作失败 */
}
INT8 epBulkRcv( INT8 *mBuffer, INT8 mLength )
{
INT8 mBulkIn, mCount,CH375IntStatus;
mCH375Write( SFR_USB_H_ENDP, mCH375Read( VAR_UDISK_TOGGLE ) );
mBulkIn = mCH375Read( VAR_UDISK_BULK_IN );
CH375IntStatus = 0; /* 清操作完成的中断状态 */
CH375_CMD_PORT_d_out( CMD_ISSUE_TOKEN );
CH375_DAT_PORT_d_out( mBulkIn ); /* 高4位目的端点号, 低4位令牌PID */
// if ( CH375LibConfig & 0x80 ) while ( CH375IntStatus == 0 ); /* 中断方式,等待数据传输操作 */
// else xQueryInterrupt( ); /* 查询方式,查询中断状态 */
CH375IntStatus=mWaitInterrupt( );
if ( CH375IntStatus == USB_INT_SUCCESS ) { /* 操作成功 */
mCH375Write( VAR_UDISK_TOGGLE, mCH375Read( VAR_UDISK_TOGGLE ) ^ 0x80 );
CH375_CMD_PORT_d_out( CMD_RD_USB_DATA ); /* 从CH375的端点缓冲区读取接收到的数据 */
mCount = CH375_DAT_PORT_in( ); /* 后续数据长度 */
mLength = mCount;
while( mCount ) {
*mBuffer = CH375_DAT_PORT_in( );
mBuffer ++;
mCount --;
}//printf("mUsbBulkRecv success\n ");
return 1;
}
else return 0; /* 操作失败 */
}
TPBLK_STRUC idata TPBulk_Block;
#define TPBulk_CBW TPBulk_Block.TPBulk_CommandBlock
#define CBW_wXferLen TPBulk_CBW.dCBW_DataXferLen
#define RBC_CDB TPBulk_CBW.cdbRBC
#define RBC_LUN TPBulk_CBW.bCBW_LUN
#define TPBulk_CSW TPBulk_Block.TPBulk_CommandStatus
/*unsigned char TPBulk_GetMaxLUN(void)
{
usbstack.setup.bmRequest=0xa1;
usbstack.setup.bRequest=0xfe;
usbstack.setup.wValue=0;
usbstack.setup.wIndex=0;
usbstack.setup.wLength=1;
usbstack.buffer=DBUF;
return ep0Xfer();
}*/
/*
unsigned char SPC_READLONG(void)
{
#define cdbReadLong RBC_CDB.SpcCdb_ReadLong
//nsigned char retStatus=FALSE;
TPBulk_CBW.dCBW_Signature=CBW_SIGNATURE;
TPBulk_CBW.dCBW_Tag=0x60a624de;
TPBulk_CBW.dCBW_DataXferLen=0xfc000000;
TPBulk_CBW.bCBW_Flag=0x80;
TPBulk_CBW.bCBW_LUN=0;
TPBulk_CBW.bCBW_CDBLen=sizeof(READ_LONG_CMD);
/////////////////////////////////////
cdbReadLong.OperationCode=SPC_CMD_READLONG;
cdbReadLong.LogicalUnitNum=0;
cdbReadLong.AllocationLen=0xfc;
//////////////////////////////////////
if(!epBulkSend((unsigned char *)&TPBulk_CBW,sizeof(TPBulk_CBW)))
return FALSE;
if(!epBulkRcv(DBUF,0xfc))
return FALSE;
if(!epBulkRcv((unsigned char *)&TPBulk_CSW,13))
return FALSE;
////////////////////////////
return TRUE;
#undef cdbReadLong
}
*/
/*
unsigned char SPC_RequestSense(void)
{
#define cdbRequestSenseSPC RBC_CDB.SpcCdb_RequestSense
//unsigned char retStatus=FALSE;
TPBulk_CBW.dCBW_Signature=CBW_SIGNATURE;
TPBulk_CBW.dCBW_Tag=0x60a624de;
TPBulk_CBW.dCBW_DataXferLen=0x0e000000;
TPBulk_CBW.bCBW_Flag=0x80;
TPBulk_CBW.bCBW_LUN=0;
TPBulk_CBW.bCBW_CDBLen=sizeof(REQUEST_SENSE_SPC);
/////////////////////////////////////
cdbRequestSenseSPC.OperationCode=SPC_CMD_REQUESTSENSE;
cdbRequestSenseSPC.AllocationLen=0x0e;
//////////////////////////////////////
if(!epBulkSend((unsigned char *)&TPBulk_CBW,sizeof(TPBulk_CBW)))
return FALSE;
if(!epBulkRcv(DBUF,18))
return FALSE;
if(!epBulkRcv((unsigned char *)&TPBulk_CSW,13))
return FALSE;
/////////////////////////////
return TRUE;
#undef cdbRequestSenseSPC
}
*/
unsigned char SPC_TestUnit(void)
{
#define cdbTestUnit RBC_CDB.SpcCdb_TestUnit
//unsigned char retStatus=FALSE;
TPBulk_CBW.dCBW_Signature=CBW_SIGNATURE;
TPBulk_CBW.dCBW_Tag=0x60a624de;
TPBulk_CBW.dCBW_DataXferLen=0x00000000;
TPBulk_CBW.bCBW_Flag=0x00;
TPBulk_CBW.bCBW_LUN=0;
TPBulk_CBW.bCBW_CDBLen=sizeof(TEST_UNIT_SPC);
/////////////////////////////////////
cdbTestUnit.OperationCode=SPC_CMD_TESTUNITREADY;
//////////////////////////////////////
if(!epBulkSend((unsigned char *)&TPBulk_CBW,sizeof(TPBulk_CBW)))
return FALSE;
if(!epBulkRcv((unsigned char *)&TPBulk_CSW,13))
return FALSE;
#undef cdbTestUnit
////////////////////////////
return TRUE;
}
unsigned char SPC_LockMedia(void)
{
#define cdbLockSPC RBC_CDB.SpcCdb_Remove
//unsigned char retStatus=FALSE;
TPBulk_CBW.dCBW_Signature=CBW_SIGNATURE;
TPBulk_CBW.dCBW_Tag=0x60a624de;
TPBulk_CBW.dCBW_DataXferLen=0x00000000;
TPBulk_CBW.bCBW_Flag=0x00;
TPBulk_CBW.bCBW_LUN=0;
TPBulk_CBW.bCBW_CDBLen=sizeof(MEDIA_REMOVAL_SPC);
///////////////////////////////////////////
cdbLockSPC.OperationCode=SPC_CMD_PRVENTALLOWMEDIUMREMOVAL;
cdbLockSPC.Prevent=1;
///////////////////////////////////////////
if(!epBulkSend((unsigned char *)&TPBulk_CBW,sizeof(TPBulk_CBW)))
return FALSE;
if(!epBulkRcv((unsigned char *)&TPBulk_CSW,13))
return FALSE;
#undef cdbLockSPC
/////////////////////////////
return TRUE;
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -