51单片机与USB芯片PDIUSBD12接口固件程序_51单片机

51单片机与USB芯片PDIUSBD12接口固件程序

点击数：7843 次录入时间：03-04 11:50:32 整理：http://www.55dianzi.com 51单片机

{
Outportb(D12_COMMAND,0xd0);
if(bEnable) bAddress |= 0x80;
Outportb(D12_DATA,bAddress);
}
//设置端点使能
void D12_SetEndpointEnable(unsigned char bEnable)
{
Outportb(D12_COMMAND,0xD8);
if(bEnable)
Outportb(D12_DATA,1);
else
Outportb(D12_DATA,0);
}
//读中断寄存器
unsigned short D12_ReadInterruptRegister(void)
{
unsigned char b1;
unsigned int j;
Outportb(D12_COMMAND,0xF4);
b1=Inportb(D12_DATA);
j=Inportb(D12_DATA);
j<<=8;
j+=b1;
return j;
}
//读取端点状态
unsigned char D12_ReadEndpointStatus(unsigned char EndPoint)
{
unsigned char BackValue;

if(EventFlags.Bits.InISR == 0)
EA = 0;

Outportb(D12_COMMAND, 0x80 + EndPoint);//读取端点状态
BackValue = Inportb(D12_DATA);

if(EventFlags.Bits.InISR == 0)
EA = 1;

return BackValue;
}
//读端点最后处理状态
unsigned char D12_ReadLastTransactionStatus(unsigned char bEndp)
{
Outportb(D12_COMMAND,0x40+bEndp);
return Inportb(D12_DATA);
}
//读端口
unsigned char D12_ReadEndpoint(unsigned char endp,unsigned char len,unsigned char *buf)
{
unsigned char i,j;
Outportb(D12_COMMAND,endp);
if((Inportb(D12_DATA)&0xff)==0)//" define D12_FULLEMPTY as 0xFF by newer
return 0;
Outportb(D12_COMMAND,0x80+endp);
i=Inportb(D12_DATA);
i=i&0x60;

Outportb(D12_COMMAND,0xF0);
j=Inportb(D12_DATA);
j=Inportb(D12_DATA);
if(j>len)
j=len;
for(i=0;i<j;i++)
*(buf+i)=Inportb(D12_DATA);
Outportb(D12_COMMAND,0xF2);
return j;
}

unsigned char D12_ReadEndpoint_Int(unsigned char endp,unsigned char len,unsigned char *buf)
{
unsigned char i,j;
Outportb(D12_COMMAND,endp);
if((Inportb(D12_DATA)&0xff)==0)//" define D12_FULLEMPTY as 0xFF by newer
return 0;
Outportb(D12_COMMAND,0x80+endp);
i=Inportb(D12_DATA);
i=i&0x60;

Outportb(D12_COMMAND,0xF0);
j=Inportb(D12_DATA);
j=Inportb(D12_DATA);
if(j>len)
j=len;
for(i=0;i<j;i++)
*(buf+i)=Inportb(D12_DATA);
Outportb(D12_COMMAND,0xF2);
return j;
}

unsigned char D12_WriteEndpoint(unsigned char endp,unsigned char len,unsigned char * buf)
{
unsigned char i;
Outportb(D12_COMMAND,endp);
Inportb(D12_DATA);
Outportb(D12_COMMAND,0xF0);
Outportb(D12_DATA,0);
Outportb(D12_DATA,len);
for(i=0;i<len;i++)
Outportb(D12_DATA,*(buf+i));
Outportb(D12_COMMAND,0xFA);
return len;
}

unsigned char D12_WriteEndpoint_Int(unsigned char endp,unsigned char len,unsigned char * buf)
{
unsigned char i;
Outportb(D12_COMMAND,endp);
Inportb(D12_DATA);
Outportb(D12_COMMAND,0xF0);
Outportb(D12_DATA,0);
Outportb(D12_DATA,len);
for(i=0;i<len;i++)
Outportb(D12_DATA,*(buf+i));
Outportb(D12_COMMAND,0xFA);
return len;
}

void DisconnectUSB(void)
{
D12_SetMode(0x02,0x03);//SET TO ONE? by newer
}

void InitialUSBInt(void);
void ConnectUSB(void)
{
EventFlags.Value = 0x0000;
InitialUSBInt();
D12_SetMode(0x16,0x03);
}

void ReconnectUSB(void)
{
SUSPEND = 0;
DisconnectUSB();
USB_Delay1ms(1000);
ConnectUSB();
}

//**************************************************************************
//中断服务程序
void InitialUSBInt(void)
{
IT1=0; //低电平中断触发
EX1=1; //允许外部中断
PX1=0; //优先级低
EA =1;
}

void EP0_Out(void)
{
unsigned char ep_last,i;
ep_last=D12_ReadLastTransactionStatus(0);//interrupt symbol
if(ep_last&D12_SETUPPACKET)
{ //recieved SETUP packet ---by newer
  ControlData.wLength=0;
  ControlData.wCount=0;
  if(D12_ReadEndpoint_Int(0,sizeof(ControlData.DeviceRequest),(unsigned char *)(&(ControlData.DeviceRequest)))!=sizeof(DEVICE_REQUEST))
  {
   D12_SetEndpointStatus(0,1);
   D12_SetEndpointStatus(1,1);
   EventFlags.Bits.ControlState=0; //should define USB_IDLE first --by newer
   return;
  }

  ControlData.DeviceRequest.wValue=SWAP(ControlData.DeviceRequest.wValue);
  ControlData.DeviceRequest.wIndex=SWAP(ControlData.DeviceRequest.wIndex);
  ControlData.DeviceRequest.wLength=SWAP(ControlData.DeviceRequest.wLength);

  D12_AcknowledgeEndpoint(0);
  D12_AcknowledgeEndpoint(1);
  ControlData.wLength=ControlData.DeviceRequest.wLength;
  ControlData.wCount=0;
  if(ControlData.DeviceRequest.bmRequestType&(unsigned char)USB_ENDPOINT_DIRECTION_MASK)
  {
   EventFlags.Bits.SetupPacket=1; //recv from host? --by newer
   EventFlags.Bits.ControlState=1; //by newer
  }
  else
  {
   if(ControlData.DeviceRequest.wLength==0)
   {
    EventFlags.Bits.SetupPacket=1;
    EventFlags.Bits.ControlState=0; //by newer
   }
   else
   {
    if(ControlData.DeviceRequest.wLength>16)//最大传16byte
    {
     EventFlags.Bits.ControlState=0; //by newer
     D12_SetEndpointStatus(0,1);
     D12_SetEndpointStatus(1,1);
    }
    else
    {
     EventFlags.Bits.ControlState=2;//by newer
    }
   }
  }
}
else if(EventFlags.Bits.ControlState==2)
{
  i=D12_ReadEndpoint_Int(0,EP0_PACKET_SIZE,ControlData.dataBuffer+ControlData.wCount);
  ControlData.wCount+=i;
  if(i!=EP0_PACKET_SIZE||ControlData.wCount>=ControlData.wLength)
  {
   EventFlags.Bits.SetupPacket=1;
   EventFlags.Bits.ControlState=0;
  }
}
else
  EventFlags.Bits.ControlState=0;
}

void EP0_In(void)
{
short i=ControlData.wLength-ControlData.wCount;
D12_ReadLastTransactionStatus(1);
if(EventFlags.Bits.ControlState!=1) return;
if(i>=EP0_PACKET_SIZE)
{
  D12_WriteEndpoint_Int(1,EP0_PACKET_SIZE,ControlData.pData+ControlData.wCount);
  ControlData.wCount+=EP0_PACKET_SIZE;
  EventFlags.Bits.ControlState=1;
  return;
}
if(i!=0)
{
  D12_WriteEndpoint_Int(1,i,ControlData.pData+ControlData.wCount);
  ControlData.wCount+=i;
  EventFlags.Bits.ControlState=0;
  return;
}
D12_WriteEndpoint_Int(1,0,0);
EventFlags.Bits.ControlState=0;
}
void EP1_Out(void)
{
unsigned char Length;