📄 udisk.c
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#include "UDISK_DEF.H"
#define io_port1 *(char xdata *)0x8011
unsigned char Device_Descriptor[18] = {
0x12, //0x12
0x01, //设备描述符类型
0x10, 0x02, //spec rev level (BCD) 1.0
0x0, //设备类型代码
0x0, //设备子类型代码
0x0, //设备协议
0x20, //max packet size
0x11, 0x11,
0x22, 0x22,
0x33, 0x33,
0,
0,
0,
0x01 //配置数量
};
unsigned char Configuration_Descriptor_All[32] = {
/*配置描述符*/
9, //描述符长度
2, //配置描述符 (0x02)
0x20,
0x00,
1, //设备接口数量
1,
0,
0x80,
0xfa,
/*接口描述符*/
9, //描述符长度
4, //接口描述符
0,
0,
2, //设备中用到的端口数目
8, //设备类代码--海量存储设备
6, //6=SCSI
0x50, //bulk 0nly 传输
0,
/*端口描述符*/
0x07, //端口描述符长度.
0x05, //描述符类型---端口
0x81, //IN端口
0x02, //BULK端口
0x20, 0x00, //最大传输量
0x0,
0x07, //端口描述符长度.
0x05, //描述符类型---端口
0x02, //OUT端口
0x02, //BULK端口
0x20, 0x00, //最大传输量
0x0
};
unsigned char B_InquiryData[] = {
0x00, //Direct Access Device
0x80, //RMB
0x00, //ISO/ECMA/ANSI
0x01, //Response Data Format
0x1f, //Additional Length
0x00, //Reserved
0x00, //Reserved
0x00, //Reserved
'X', 'I', 'N', 'Z', 'X', ' ', ' ', ' ', //Vendor Information
'U', 'S', 'B', '-', 'M', 'A', 'S', 'S', 'S', 'T', 'O', 'R', 'A', 'G', 'E', ' ',//Product Identification
0, 0, 0, 0
};
/*SCSI-Read_Format_capacities命令的返回数据 */
code unsigned char B_Read_Format_capacities[] = {0x00, 0x00, 0x00, 0x10, //capacity list header
0x00, 0x00, 0x07, 0xf5, 0x01, 0x00, 0x02, 0x00, //capacity descriptor
//Number of Blocks =2037,unformatted media,blocklength = 512Bytes
0x00, 0x00, 0x07, 0xfd, 0x00, 0x00, 0x02, 0x00 //Formattable Capacity Descriptors
};
//SCSI-Read_Capacity命令的返回数据
code unsigned char B_Read_Capacity[] = {
0x00, 0x00, 0xfe, 0xa0, //Last Logical Block Address for 32MB
0x00, 0x00, 0x02, 0x00 //block length in bytes
};
//SCSI-Mode_Sense命令的返回数据
code unsigned char B_Mode_Sense_ALL[] = {0x0b, 0x00, //Mode Data Length
0x00, 0x08, 0x00, 0x00,
0x7d, 0, 0, 0, 0x02, 0x00
};
//SCSI-Mode_Sense命令的返回数据
code unsigned char B_Mode_Sense_TPP[] = {0xf0, 0x00, //Mode Data Length
05, 00, 00, 00, 00, 0x0b, 00, 00, 00, 00, 0x24, 00, 00, 00, 00, 00
};
//SCSI-Mode_Sense命令的返回数据
code unsigned char B_Mode_Sense_ZERO[] = {0x00, 0x06, //Mode Data Length
0x00, //Medium Type Code
0, //write enabled
0, 0, 0, 0 //reserved
};
unsigned char data bulk_CSW[]={0x55,0x53,0x42,0x53, //bytes 4 dCSWSignature
0x00,0x00,0x00,0x00, //bytes 4 dCSWTag
0x00,0x00,0x00,0x00, //bytes 4 dDataResiduce
0x00}; //bCSWStatus 00=good state.
struct_CBW data bulk_CBW;
void main()
{
Flash_Reset();
USBInit();
EpEnable();
while(1)
{
if (UEPINT & EP0) Ep0();//端口0中断处理
if (UEPINT & EP1) Ep1();//端口1中断处理
if (UEPINT & EP2) Ep2();//端口2中断处理
}
}/////////////////////////////////////////////////////
void USBInit()
{
int data i;
CKCON|=1; //X2 Mode
/*PLL配置*/
PLLNDIV = 0x04;
PLLCON |= (0x3&11)<<6;
PLLRDIV = (0x3ff&11)>>2;
USBCLK=0;
PLLCON&=(~PLLRES);
PLLCON|=PLLEN;
USBCON&=(~USBE);
for(i=0;i<1000;i++);//延时
USBCON|=USBE;//USB控制器使能
}
///////////////////////////////////////////////////
void EpEnable(void)
{
UEPNUM=0x00; UEPCONX=0x80;
UEPNUM=0x01; UEPCONX=0x86;
UEPNUM=0x02; UEPCONX=0x82;
UEPRST=0x07; UEPRST= 0x00;
UEPIEN=0x07; USBIEN|=EEOFINT;
USBADDR=FEN;
}
///////////////////////////////////////////////////
unsigned char ReadEp(unsigned char EpNum,unsigned char *Data)//读指定端口
{
unsigned char data i=0;
UEPNUM=EpNum;
while(i<UBYCTLX)
{
Data[i++]=UEPDATX;
}
UEPSTAX&=~(RXOUTB0|RXOUTB1|RXSETUP);
return(i);
}
/////////////////////////////////////////////////////
void WriteEp(unsigned char EpNum,unsigned char nLength,unsigned char *Data)//写指定端口
{
unsigned char data i=0;
UEPNUM=EpNum;
UEPSTAX|=DIR;
while(nLength--) UEPDATX=Data[i++];
UEPSTAX|=TXRDY;
while(!(UEPSTAX&TXCMP)) ;
UEPSTAX&=(~(TXCMP));
}
///////////////////////////////////////////////////
void Set_Address(unsigned char EpNum)//SET_address请求处理
{
WriteEp(0,0,0);
USBADDR|=EpNum;
USBADDR|=FEN;
USBCON|=FADDEN;
}
//////////////////////////////////////////////////////
void Get_Descriptor(unsigned char DesType,unsigned char nLength)//获得设备的描述符请求处理函数
{
if(DesType==0x01)//设备描述符
WriteEp(0,18,Device_Descriptor);
if((DesType==0x02)&&(nLength==0x09))//配置描述符
WriteEp(0,9,Configuration_Descriptor_All);
if((DesType==0x02)&&(nLength==0xff))//描述符集合
{
WriteEp(0,32,Configuration_Descriptor_All);
WriteEp(0,2,&Device_Descriptor[4]);
}
if((DesType==0x02)&&(nLength==0x20)) //配置、接口、端口描述符集合
WriteEp(0,32,Configuration_Descriptor_All);
}
//////////////////////////////////////////////////////////
void Set_Configuration(unsigned char wValue)//使能配置
{
if(wValue == 0)
{
UEPNUM=0x00; UEPCONX=0x80;
UEPNUM=0x01; UEPCONX=0x86;
UEPNUM=0x02; UEPCONX=0x82;
USBCON&=(~CONFG);
WriteEp(0,0,0);
}
else if(wValue == 1)
{
UEPNUM=0x00; UEPCONX=0x80;
UEPNUM=0x01; UEPCONX=0x86;
UEPNUM=0x02; UEPCONX=0x82;
USBCON|=CONFG;
WriteEp(0,0,0);
}
}
///////////////////////////////////////////////////////////////
void Ep0()//端口0处理函数
{
unsigned char data DT[32]={0,};
unsigned char data i;
i = ReadEp(0,DT);
if (((DT[0] & 0x60)==0) && i)
{
switch (DT[1])
{
case set_address :Set_Address(DT[2]); break;
case get_descriptor :Get_Descriptor(DT[3],DT[6]); break;
case set_configuration :Set_Configuration(DT[2]); break;
default :; break;
}
}
else if(DT[0]==0xa1)
{
WriteEp(0,0,0);
}
}
/////////////////////////////////////////////////////////////////////////
void WriteEpBulk(unsigned char EpNum,unsigned char nLength,unsigned char *Data)//写端口
{
unsigned char data i;
UEPNUM=EpNum;
UEPSTAX|=DIR;
for(i=0;i<nLength;i++) UEPDATX=Data[i];
UEPSTAX|=TXRDY;
}
//////////////////////////////////////////////////////////////////////////
void TransmitCSW()//传送状态字
{
WriteEpBulk(1, sizeof(bulk_CSW), bulk_CSW);
while(!(UEPSTAX&TXCMP)) ;
UEPSTAX&=(~(TXCMP));
}
///////////////////////////////////////////////////////////////////////////
void Ep1()//端口1处理函数
{
UEPSTAX&=(~(TXCMP));
TransmitCSW();
}
//////////////////////////////////////////////////////////////////////////
void SCSI_Mode_Sense()
{
if(bulk_CBW.CBWCB[2] == SCSI_MSPGCD_TPP) //Page Code=Timer and Potect Page
{WriteEpBulk(1, sizeof(B_Mode_Sense_TPP), B_Mode_Sense_TPP);}
else if(bulk_CBW.CBWCB[2] == SCSI_MSPGCD_RETALL) //Page Code=All
{WriteEpBulk(1, sizeof(B_Mode_Sense_ALL), B_Mode_Sense_ALL);}
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