main.c

USB与FPGA接口的程序设计。里面是所有的源文件都经本人测试可以用

	    }
	  else if (iIrqUsb & 0x20)	//EP2 IN
	    {
	      XmtBuff.pNum = 64;
	      XmtBuff.in = 5;
	      SETADDR = 0x45;	//读 in 最后状态
	      tmp = SETDATA;
	      XmtBuff.b[0] = 5;
	      XmtBuff.wrLength = 1;
	      XmtBuff.p = XmtBuff.b;
	      rx_0 ();
	    }
	  else if (iIrqUsb & 0x80)
	    {

	    }
	  else if (iIrqUsb & 0x40)
	    {

	    }

	}
    }
}

void
MLsup_StallEP0 (void)
{
  // Give a needle hole for Setup Overwritten as well as ISR
  SETADDR = 0x40;		// 0 端点停止(用于发送Stall包)
  SETDATA = 0x01;
  SETADDR = 0x41;		// 1 端点停止(用于发送Stall包)
  SETDATA = 0x01;
  SETADDR = 0xF1;		// 应答SETUP包,使能(清 OUT 缓冲区、使能 IN 缓冲区)命令
}

void
GetStatus (void)
{
  XmtBuff.b[1] = 0x00;
  switch (XmtBuff.b[0])
    {
    case 0x80:			//返回设备状态
      //发送两个字节数据：第一字节D1为1支持远程唤醒，D0为0是总线供电,其它位为0；第二字节为0。
      XmtBuff.b[0] = 0x03;
      break;
    case 0x81:			//返回接口状态
      //发送两个字节数据：第一字节为0；第二字节为0。
      //XmtBuff.b[5] 为接口号
      XmtBuff.b[0] = 0x00;
      break;
    case 0x82:			//返回端点状态
      //发送两个字节数据：第一字节D0为1端点处于暂停，否则D0为0,其它位为0；第二字节为0。
      //XmtBuff.b[5] D7为方向，D3~0为端点号
      XmtBuff.b[0] = 0x00;
      break;
    }
  XmtBuff.wrLength = 2;
  XmtBuff.p = XmtBuff.b;
  rx_0 ();
}

void
ClearFeature (void)
{
  switch (XmtBuff.b[0])
    {
    case 0x00:			//清设备唤醒功能
      break;
    case 0x01:			//清接口状态
      break;
    case 0x02:			//启用端点
      //XmtBuff.b[5] D7为方向，D3~0为端点号
      if (XmtBuff.b[5] < 0x80)
	{
	  SETADDR = 0x40 + XmtBuff.b[5] * 2;	// 启用OUT端点
	  SETDATA = 0x00;
	}
      else
	{
	  XmtBuff.b[5] = XmtBuff.b[5] & 0x0f;
	  SETADDR = 0x41 + XmtBuff.b[5] * 2;	// 启用IN端点
	  SETDATA = 0x00;
	}
      break;
    }
  XmtBuff.wrLength = 0;
  rx_0 ();
}

void
SetFeature (void)
{
  switch (XmtBuff.b[0])
    {
    case 0x00:			//设置设备唤醒功能
      break;
    case 0x01:			//设置接口状态
      break;
    case 0x02:			//停止端点
      //XmtBuff.b[5] D7为方向，D3~0为端点号
      if (XmtBuff.b[5] < 0x80)
	{
	  SETADDR = 0x40 + XmtBuff.b[5] * 2;	// 停止OUT端点
	  SETDATA = 0x01;
	}
      else
	{
	  XmtBuff.b[5] = XmtBuff.b[5] & 0x0F;
	  SETADDR = 0x41 + XmtBuff.b[5] * 2;	// 停止IN端点
	  SETDATA = 0x01;
	}
      break;
    }
  XmtBuff.wrLength = 0;
  rx_0 ();
}

void
SetAddress (void)
{
  SETADDR = 0xD0;		//设置新地址使能
  SETDATA = 0x80 | XmtBuff.b[2];
  XmtBuff.wrLength = 0;
  rx_0 ();
}

void
GetDescriptor (void)
{
  unsigned int i = 0;
  switch (XmtBuff.b[3])
    {
    case 0x01:			//USB_DEVICE
      XmtBuff.wrLength = sizeof (device_descriptor);
      XmtBuff.p = device_descriptor;
      break;
    case 0x02:			// USB_CONFIGURATION
      i = XmtBuff.b[7];
      i = ((i << 8) | XmtBuff.b[6]);
      XmtBuff.wrLength = TotalConf[2];
      XmtBuff.p = TotalConf;
      if (i < 16)
	XmtBuff.wrLength = XmtBuff.b[6];
      break;
    case 0x03:			//USB_STRING
      switch (XmtBuff.b[2])
	{
	case 0x00:
	  XmtBuff.wrLength = sizeof (USBStringLanguageDescription);
	  XmtBuff.p = USBStringLanguageDescription;
	  break;
	case 0x01:
	  XmtBuff.wrLength = sizeof (USBStringDescription1);
	  XmtBuff.p = USBStringDescription1;
	  break;
	case 0x02:
	  XmtBuff.wrLength = sizeof (USBStringDescription2);
	  XmtBuff.p = USBStringDescription2;
	  break;
	default:
	  MLsup_StallEP0 ();
	  return;
	}
      break;
//HID code start
    case 0x21:
      XmtBuff.wrLength = sizeof (HIDDscr);
      XmtBuff.p = HIDDscr;
      break;
    case 0x22:
      //HID Report descriptor
      //Assumes there is one report descriptor.
      //To do: add the ability to return a specific report descriptor.
      //Can't use SUDPTRH and SUDPTRL because the report descriptor doesn't store 
      //its length in the first bytes.
      //Instead, adapt code from the String descriptor rev D errata code (above).

      //rdp holds the address of a REPORTDSCR structure.

      XmtBuff.wrLength = sizeof (ReportDscr);
      XmtBuff.p = ReportDscr;

      //else 
      //      EZUSB_STALL_EP0();      // Stall End Point 0

      break;
//HID code end
    default:
      MLsup_StallEP0 ();
      return;
    }
  rx_0 ();

}

void
GetConfiguration (void)
{
  XmtBuff.b[0] = 1;		//返回是否被配置(非 0 为配置)
  XmtBuff.wrLength = 1;
  XmtBuff.p = XmtBuff.b;
  rx_0 ();
}

void
SetConfiguration (void)
{
  if (XmtBuff.b[0] == 0x00)
    {
      XmtBuff.wrLength = 0;
      rx_0 ();
      SETADDR = 0xD8;
      if (XmtBuff.b[2] == 0x00)
	{
	  SETDATA = 0x00;	// 停止普通/同步端点
	}
      else if (XmtBuff.b[2] == 0x01)
	{
	  SETDATA = 0x01;	// 使能普通/同步端点
	  SETADDR = 0x03;
	  SETADDR = 0xFA;	// 设置 IN 缓冲区有效(满标志)
	  SETADDR = 0x05;
	  SETADDR = 0xFA;	// 设置 IN 缓冲区有效(满标志)
	}
    }
  else
    MLsup_StallEP0 ();
}

void
GetInterface (void)
{
  XmtBuff.b[0] = 0;
  XmtBuff.wrLength = 1;
  XmtBuff.p = XmtBuff.b;
  rx_0 ();
}

void
SetInterface (void)
{
  XmtBuff.wrLength = 0;
  rx_0 ();
}

void
InitD12 ()
{
    int i = 0;
    *(volatile unsigned char *)0x80000043 &= 0xf7;
    *(volatile unsigned char *)0x80000003 &= 0xf7;
    for (i=0; i<20000; i++) ;
    *(volatile unsigned char *)0x80000003 |= 0x08;

    *(volatile unsigned long *)0x80000180 |= 0x12000000;
    *(volatile unsigned long *)0x80000180 &= 0x12ffffff;
	SETADDR  = 0xD0;
	SETDATA  = 0x80;

	SETADDR  = 0xF3;
	SETDATA  = 0x06;
	SETDATA  = 0x03;
	
	for (i=0; i<200000; i++);
	SETADDR  = 0xF3;
	SETDATA  = 0x16;
}

void
rx_0 ()
{
  INT8 tmp;

  if (XmtBuff.pNum > XmtBuff.wrLength)
    {
      XmtBuff.b[6] = XmtBuff.wrLength;
    }
  else
    {
      XmtBuff.b[6] = XmtBuff.pNum;
      bIsOrig = 0;
    }

  tmp =  XmtBuff.in;
  SETADDR = tmp;		// 选择 IN 端点(指针指向0位置)
  SETADDR = 0xF0;		// 写缓冲区
  SETDATA = 0x00;
  tmp =  XmtBuff.b[6];
  SETDATA = tmp;

  for (XmtBuff.b[7] = 0; XmtBuff.b[7] < XmtBuff.b[6]; XmtBuff.b[7]++)
    {
      tmp = *(XmtBuff.p++);
      SETDATA = tmp;
    }
  XmtBuff.wrLength -= XmtBuff.b[6];
  if (XmtBuff.wrLength <= 0)
    bIsOrig = 1;
  SETADDR = 0xFA;		// 设置 IN 缓冲区有效(满标志)

  tmp = XmtBuff.in;
  SETADDR = tmp | 0x40;
  tmp = SETDATA;
}

void
tx_0 ()
{
  int i;
  SETADDR = 0x00;
  SETADDR = 0xF0;
  XmtBuff.b[0] = SETDATA;
  XmtBuff.b[1] = SETDATA;
  for (i = 0; i < 8; i++)
    {
      XmtBuff.b[i] = SETDATA;
    }
  SETADDR = 0xF1;		// 应答SETUP包,使能(清 OUT 缓冲区、使能 IN 缓冲区)命令
  SETADDR = 0xF2;		// 清 OUT 缓冲区
  SETADDR = 0x01;		// 选择端点 1(指针指向0位置)
  SETADDR = 0xF1;		// 应答SETUP包,使能(清 OUT 缓冲区、使能 IN 缓冲区)命令

  if (XmtBuff.b[0] & 0x20)	//厂商请求跳转表
    {
      (*NonStandardDeviceRequest[XmtBuff.b[1]]) ();
      return;
    }
  else
    {
      if (XmtBuff.b[1] <= 0x0B)	//标准请求跳转表
	{

	  (*StandardDeviceRequest[XmtBuff.b[1]]) ();
	  return;
	}
    }

}

void
tx_1 ()
{
  int i;
  SETADDR = XmtBuff.out;	// 选择端点0(指针指向0位置)
  SETADDR = 0xF0;		// 读标准控制码
  XmtBuff.b[0] = SETDATA;
  XmtBuff.b[1] = SETDATA;
  for (i = 0; i < 8; i++)
    {
      XmtBuff.b[i] = SETDATA;
    }
  SETADDR = 0xF2;		// 清 OUT 缓冲区
}

void
read_out ()
{
  INT8 i;
  SETADDR = XmtBuff.out;	// 选择端点0(指针指向0位置)
  SETADDR = 0xF0;		// 读标准控制码
  XmtBuff.b[0] = SETDATA;
  XmtBuff.b[1] = SETDATA;
  for (i = 0; i < 8; i++)
    {
      XmtBuff.b[i] = SETDATA;
    }
  SETADDR = 0xF2;		// 清 OUT 缓冲区
}

void
SetReport ()
{
  bSetReport = 1;
}

void
GetReport ()
{
  XmtBuff.wrLength = sizeof (HIDData);
  XmtBuff.p = HIDData;
  rx_0 ();
}

void
SetIdle () {
}

void
GetIdle ()
{
  idle = XmtBuff.b[2];
}

void
SetProtocol ()
{
  protocol = XmtBuff.b[2];
}

void
GetProtocol ()
{
  XmtBuff.wrLength = sizeof (protocol);
  XmtBuff.p = &protocol;
  rx_0();
}