📄 ch375.c
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buff1[i]=0x0;
buff1[0]=0xf8;
buff1[1]=0xff;
//==========================================
//first FAT
addr=0x200;
for (i=0;i<512;i++)
USBDISK[addr++] = buff1[i];
buff1[0] = 0;
buff1[1] = 0;
for(j=0;j<15;j++)
for (i=0;i<512;i++)
USBDISK[addr++] = buff1[i];
//===========================================
buff1[0]=0xf8;
buff1[1]=0xff;
//second FAT
for (i=0;i<512;i++)
USBDISK[addr++] = buff1[i];
buff1[0] = 0;
buff1[1] = 0;
for(j=0;j<15;j++)
for (i=0;i<512;i++)
USBDISK[addr++] = buff1[i];
//===========================================
//direction
for(j=0;j<32;j++)
for (i=0;i<512;i++)
USBDISK[addr++] = buff1[i];
}
//==================================
void UsbDeviceInit(void)
{
Uart_Printf("begin usb device!\n");
CH375_WR_CMD_PORT( CMD_SET_USB_ID ); // 设置外部自定义的USB设备VID和PID,可选操作
CH375_WR_DAT_PORT( (unsigned char)MY_USB_VENDOR_ID ); // 写入厂商ID的低字节
CH375_WR_DAT_PORT( (unsigned char)(MY_USB_VENDOR_ID>>8) ); // 写入厂商ID的高字节
CH375_WR_DAT_PORT( (unsigned char)MY_USB_DEVICE_ID ); // 写入设备ID的低字节
CH375_WR_DAT_PORT( (unsigned char)(MY_USB_DEVICE_ID>>8) ); // 写入设备ID的高字节
if (set_usb_mode(1) ) // 设置USB从机外置固件模式
Uart_Printf("Set device mode done!\n");
SystemStatus = CBWIdle;
}
void ProcessCSW(void)
{
//Uart_Printf("CSW\n");
SystemStatus = CBWIdle;
SystemBuffer[0] = 0x55;//
SystemBuffer[1] = 0x53;
SystemBuffer[2] = 0x42;
SystemBuffer[3] = 0x53;
SystemBuffer[4] = dCBWTag[0]; //在CSW中返回
SystemBuffer[5] = dCBWTag[1];
SystemBuffer[6] = dCBWTag[2];
SystemBuffer[7] = dCBWTag[3];
//dCSWDataResidue
SystemBuffer[8] =((unsigned char*)&dCBWDataTransferLength)[0];
SystemBuffer[9] =((unsigned char*)&dCBWDataTransferLength)[1];
SystemBuffer[10] =((unsigned char*)&dCBWDataTransferLength)[2];
SystemBuffer[11] =((unsigned char*)&dCBWDataTransferLength)[3];
SystemBuffer[12] = 0x0; //bCSWStatus
wr_usb_data(13,SystemBuffer);
}
// CH375中断服务程序,CH375的INT#引脚连接到eint0
void __irq CH375Interrupt(void)
{
unsigned char InterruptStatus;
unsigned char length, len,c1,CH375FLAGERR;
unsigned char cbw_error;
unsigned char point;
unsigned char tmp,command;
rI_ISPC=BIT_EINT0;
CH375_WR_CMD_PORT(CMD_GET_STATUS); //获取中断状态并取消中断请求
delay2us();
CH375FLAGERR =0;
InterruptStatus = CH375_RD_DAT_PORT(); //获取中断状态
//Uart_Printf("InterruptStatus:%02x\n",InterruptStatus);
switch( InterruptStatus ) //分析中断状态
{
case USB_INT_EP2_OUT: // 批量端点下传成功
CH375_WR_CMD_PORT( CMD_RD_USB_DATA ); //从当前USB中断的端点缓冲区读取数据块,并释放缓冲区
length = CH375_RD_DAT_PORT(); //首先读取后续数据长度
if ( length != 0 ) //如果长度为0则不处理
{
for (len=0;len<length;len++)
{
SystemBuffer[len] = CH375_RD_DAT_PORT();
//Uart_Printf("%02x ",SystemBuffer[len]);
delay2us();
}
//Uart_Printf("\n");
}
//============CBW===============
if (SystemStatus ==CBWIdle)//处理命令状态
{
cbw_error = FALSE;
point=0;
if(SystemBuffer[0]!=0x55)
cbw_error=TRUE;
if(SystemBuffer[1]!=0x53)
cbw_error=TRUE;
if(SystemBuffer[2]!=0x42)
cbw_error=TRUE;
if(SystemBuffer[3]!=0x43)
cbw_error=TRUE;
dCBWTag[0] = SystemBuffer[4]; //在CSW中返回
dCBWTag[1] = SystemBuffer[5];
dCBWTag[2] = SystemBuffer[6];
dCBWTag[3] = SystemBuffer[7];
((unsigned char*)&dCBWDataTransferLength)[0] = SystemBuffer[8];//dCBWDataTransferLength
((unsigned char*)&dCBWDataTransferLength)[1] = SystemBuffer[9];
((unsigned char*)&dCBWDataTransferLength)[2] = SystemBuffer[10];
((unsigned char*)&dCBWDataTransferLength)[3] = SystemBuffer[11];
if (SystemBuffer[12] != 0x00) // store bmCBWFlags.bit7
{ //数据从设备向host传输 in
//Usb_CBWFlag_in();
}
else
{
//Usb_CBWFlag_out();
}
//only 1 drive supported
SendFlag = 0x01;
tmp = SystemBuffer[13]; // dummy LUN read
CBWCBLength = SystemBuffer[14]; // dummy CBWCBLength read
command=SystemBuffer[15];
//Uart_Printf("Length=%d,Command=%02x\n",dCBWDataTransferLength,command);
switch(command)
{
case 0x03://request sense
dCBWDataTransferLength=0;
wr_usb_data(14,request_tab3);
SystemStatus = CSWSend;
break;
case 0x12://inquiry
dCBWDataTransferLength=0;
wr_usb_data(36,Inquiry_tab);
SystemStatus = CSWSend;
break;
case 0x1e:
ProcessCSW();
break;
case 0x23://read format capacities
dCBWDataTransferLength=0xe8;//0xfc-0x14
wr_usb_data(20,FormatCapacities);
SystemStatus = CSWSend;
break;
case 0x25://read capacity
dCBWDataTransferLength=0;
wr_usb_data(8,Capacity_tab);
SystemStatus = CSWSend;
break;
case 0x28://read 10
tmp = SystemBuffer[16];//usefuless data
((unsigned char*)&LBA_adder)[3] = SystemBuffer[17];
((unsigned char*)&LBA_adder)[2] = SystemBuffer[18];
((unsigned char*)&LBA_adder)[1] = SystemBuffer[19];
((unsigned char*)&LBA_adder)[0] = SystemBuffer[20];
((unsigned char*)&BlockLength)[1] = SystemBuffer[22];
((unsigned char*)&BlockLength)[0] = SystemBuffer[23];//逻辑块数
//Block = LBA_adder/20;
//Page = LBA_adder%20;
//Read_Page(Block,Page,SystemBuffer);
//Uart_Printf("\n LBA=%X BLOCK=%d \n",LBA_adder,BlockLength);
SystemStatus = CBWSend;
UsbWritePoint = LBA_adder*512;
//发出一包数据
wr_usb_data(64,&USBDISK[UsbWritePoint]);
UsbWritePoint+=64;
dCBWDataTransferLength-=64;
SendFlag = 0x01;
break;
case 0x2a://write 10
tmp =SystemBuffer[16];//usefuless data
((unsigned char*)&LBA_adder)[3] = SystemBuffer[17];
((unsigned char*)&LBA_adder)[2] = SystemBuffer[18];
((unsigned char*)&LBA_adder)[1] = SystemBuffer[19];
((unsigned char*)&LBA_adder)[0] = SystemBuffer[20];
((unsigned char*)&BlockLength)[1] = SystemBuffer[22];
((unsigned char*)&BlockLength)[0] = SystemBuffer[23];
Block = LBA_adder/20;
Page = LBA_adder%20;
SystemStatus = CBWReceive;
UsbWritePoint = LBA_adder*512;
break;
case 0x5a://MODE SENSE
if (SystemBuffer[17]==0x1c)
{
wr_usb_data(16,ModeSense_1c);
dCBWDataTransferLength=0;
SystemStatus = CSWSend;
}
else if (SystemBuffer[17]==0x3f)
{
wr_usb_data(64,ModeSense_3f);
dCBWDataTransferLength=8;
SystemStatus = CBWSend;
SendFlag = 0x02;
}
break;
case 0x1a:
wr_usb_data(4,command1a);
dCBWDataTransferLength=0xbc;
SystemStatus = CSWSend;
break;
case 0://test unit ready
ProcessCSW();
break;
} //end switch
}//if cbwidle
else if (SystemStatus ==CBWReceive)
{
if (dCBWDataTransferLength>0)
{
//wr_usb_data(64,&USBDISK[UsbWritePoint]);
for (len=0;len<length;len++)
USBDISK[UsbWritePoint++]=SystemBuffer[len];
dCBWDataTransferLength-=64;
}
else
{
ProcessCSW();
}
}
break;
case USB_INT_EP2_IN: //批量端点上传成功
if (SystemStatus ==CBWSend)
{
//Uart_Printf("*");
if (SendFlag == 0x01)
{
if (dCBWDataTransferLength>0)
{
wr_usb_data(64,&USBDISK[UsbWritePoint]);
UsbWritePoint+=64;
dCBWDataTransferLength-=64;
}
else
ProcessCSW();
}
else if(SendFlag == 0x02)
{
wr_usb_data(8,&ModeSense_3f[64]);
SystemStatus = CSWSend;
}
}
else if (SystemStatus == CSWSend)//csw
{
ProcessCSW();
}
CH375_WR_CMD_PORT( CMD_UNLOCK_USB ); //释放缓冲区
break;
//==========================================================================
case USB_INT_EP0_SETUP: //控制端点建立成功
CH375_WR_CMD_PORT(CMD_RD_USB_DATA);
//EZUSB_Delay(20);
delay2us();
length=CH375_RD_DAT_PORT();
for( len=0;len<length;len++ )
{
Request.buffer[len] = CH375_RD_DAT_PORT(); // 取出数据
//Uart_Printf("[%02x] ",Request.buffer[len]);
delay2us();
}
//Uart_Printf("\n"); // 取出数据
if(length==0x08)
{
mVarSetupLength=Request.buffer[6]; //控制传输数据长度最大设置为128
//if((c1=Request.r.bmReuestType)&0x40)
//{ //厂商请求，未处理
//}
if((c1=Request.r.bmReuestType)&0x20)
{// printf("b\n"); //类请求，未处理
if(Request.buffer[1]==0x0a)
{
//Uart_Printf("c\n");
} //SET_IDLE
else if( (Request.buffer[0]==0xa1)&&(Request.buffer[1]==0xff) )
{
Request.buffer[0]=0;
}
CH375FLAGERR=0;
}
else if(!((c1=Request.r.bmReuestType)&0x60))
{ //标准请求
mVarSetupRequest=Request.r.bRequest; //暂存标准请求码
switch(Request.r.bRequest)
{ // 分析标准请求
case DEF_USB_CLR_FEATURE: //清除特性
if((c1=Request.r.bmReuestType&0x1F)==0X02)
{ //不是端点不支持
switch(Request.buffer[4])
{
case 0x82:
CH375_WR_CMD_PORT(CMD_SET_ENDP7); //清除端点2上传
CH375_WR_DAT_PORT(0x8E); //发命令清除端点
break;
case 0x02:
CH375_WR_CMD_PORT(CMD_SET_ENDP6);
CH375_WR_DAT_PORT(0x80); //清除端点2下传
break;
case 0x81:
CH375_WR_CMD_PORT(CMD_SET_ENDP5); //清除端点1上传
CH375_WR_DAT_PORT(0x8E);
break;
case 0x01:
CH375_WR_CMD_PORT(CMD_SET_ENDP4); //清除端点1下传
CH375_WR_DAT_PORT(0x80);
break;
default:
break;
}
}
else
{
CH375FLAGERR=1; //不支持的清除特性，置错误标志
}
break;
case DEF_USB_GET_STATUS: //获得状态
Request.buffer[0]=0;
Request.buffer[1]=0; //上传状态
break;
case DEF_USB_SET_ADDRESS: //设置地址
VarUsbAddress=Request.buffer[2]; //暂存USB主机发来的地址
//CH375_WR_CMD_PORT(CMD_SET_USB_ADDR);
//CH375_WR_DAT_PORT(VarUsbAddress);
//delay2us();
//Uart_Printf("new adderss:%d\n",VarUsbAddress);
break;
case DEF_USB_GET_DESCR: //获得描述符
if(Request.buffer[3]==1) //设备描述符上传
{
VarSetupDescr=DevDes;
mVarSetupLength=sizeof(DevDes);
}
else if(Request.buffer[3]==2) //配置描述符上传
{
VarSetupDescr=ConDes;
if(mVarSetupLength>sizeof(ConDes))
mVarSetupLength=sizeof(ConDes);
}
mCh375DesUp(); //其余描述符不支持
break;
case DEF_USB_GET_CONFIG: //获得配置
Request.buffer[0]=0; //没有配置则传0
if(CH375CONFLAG) Request.buffer[0]=1; //已经配置则传1；这是在描述符里规定的
break;
case DEF_USB_SET_CONFIG: //设置配置
CH375CONFLAG=0;
if ( Request.buffer[2] != 0 )
{
CH375CONFLAG=1; //设置配置标志
}
break;
case DEF_USB_GET_INTERF: //得到接口
Request.buffer[0]=1; //上传接口数，本事例只支持一个接口
break;
default :
CH375FLAGERR=1; //不支持的标准请求
break;
}
}
}
else
{ //不支持的控制传输，不是8字节的控制传输
CH375FLAGERR=1;
}
if(!CH375FLAGERR)
mCh375Ep0Up(); //没有错误/调用数据上传，，长度为0上传为状态
else
{
//Uart_Printf("stall\n");
CH375_WR_CMD_PORT(CMD_SET_ENDP3); //设置端点1为STALL，指示一个错误
CH375_WR_DAT_PORT(0x0f);
}
break;
case USB_INT_EP0_IN:
Uart_Printf("%dEP0_IN\n",mVarSetupRequest);
//EZUSB_Delay(20); //控制端点上传成功
if(mVarSetupRequest==DEF_USB_GET_DESCR)
{
mCh375DesUp();
mCh375Ep0Up();
}
else if(mVarSetupRequest==DEF_USB_SET_ADDRESS)
{ //设置地址
CH375_WR_CMD_PORT(CMD_SET_USB_ADDR);
delay2us();
CH375_WR_DAT_PORT(VarUsbAddress);
delay2us();
//Uart_Printf("new adderss:%d\n",VarUsbAddress);
}
CH375_WR_CMD_PORT (CMD_UNLOCK_USB); //释放缓冲区
break;
case USB_INT_EP0_OUT:
CH375_WR_CMD_PORT(CMD_RD_USB_DATA); //发出读数据命令
//Uart_Printf("EP0_OUT\n");
delay2us();
length=CH375_RD_DAT_PORT();
if(length)
{ //长度为0跳出
for(len=0;len!=length;len++)
{
//Uart_Printf("-%02x",CH375_RD_DAT_PORT()); //取出下传数据
c1=CH375_RD_DAT_PORT(); //取出下传数据
}
}
break;
default:
if((InterruptStatus&0x03)==0x03)
{ //总线复位
CH375FLAGERR=0; //错误清0
CH375CONFLAG=0; //配置清0
mVarSetupLength=0;
//清配置完成输出
}
else
{ //命令不支持
;
}
CH375_WR_CMD_PORT (CMD_UNLOCK_USB); //释放缓冲区
CH375_RD_DAT_PORT();
break;
}//
}
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