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

D12_ReadLastTransactionStatus(2); /* Clear interrupt flag */
Length = D12_ReadEndpoint_Int(2, sizeof(EndPoint1Buffer),EndPoint1Buffer);
if(Length != 0)
EventFlags.Bits.Port1RxDone = 1;
}

void EP1_In(void)
{
D12_ReadLastTransactionStatus(3);
}

void EP2_Out(void)
{
unsigned char Length,EP2Status;
D12_ReadLastTransactionStatus(4); /* Clear interrupt flag */

EP2Status = D12_ReadEndpointStatus(4);
EP2Status&=0x60;
Length = D12_ReadEndpoint(4,sizeof(EndPoint2Buffer),EndPoint2Buffer);
if(EP2Status==0x60)
Length = D12_ReadEndpoint(4,sizeof(EndPoint2Buffer),EndPoint2Buffer);
if(Length != 0)
EventFlags.Bits.Port2RxDone = 1;
}

void EP2_In(void)
{
D12_ReadLastTransactionStatus(5); /* Clear interrupt flag */
}
//**************************************************************************
//请求处理
typedef struct _usb_device_descriptor
{
unsigned char bLength;
unsigned char bDescriptorType;
unsigned int bcdUSB;
unsigned char bDeviceClass;
unsigned char bDeviceSubClass;
unsigned char bDeviceProtocol;
unsigned char bMaxPacketSize0;
unsigned int idVendor;
unsigned int idProduct;
unsigned int bcdDevice;
unsigned char iManufacturer;
unsigned char iProduct;
unsigned char iSerialNumber;
unsigned char bNumConfiguations;
}USB_DEVICE_DESCRIPTOR;

code USB_DEVICE_DESCRIPTOR DeviceDescr=
{
sizeof(USB_DEVICE_DESCRIPTOR),
    0x01,//USB_DEVICE_DESCRIPTOR_TYPE,
    SWAP(0x0100),
    0xDC,//USB_CLASS_CODE_TEST_CLASS_DEVICE,
    0, 0,
EP0_PACKET_SIZE,
SWAP(0x0471),
SWAP(0x0666),
SWAP(0x0100),
    0, 0, 0,
25
};
//配置描述符
typedef struct _usb_configuration_descriptor
{
unsigned char bLength[0x2e];
}USB_CONFIGURATION_DESCRIPTOR;

code USB_CONFIGURATION_DESCRIPTOR ConfigDescr=
{
0x09,0x02,0x2e,0x00,0x01,0x01,0x00,0xa0,0x32,
0x09,0x04,0x00,0x00,0x04,0xdc,0xa0,0xb0,0x00,
0x07,0x05,0x81,0x03,0x02,0x00,0x0a,
0x07,0x05,0x01,0x03,0x02,0x00,0x0a,
0x07,0x05,0x82,0x02,0x40,0x00,0x0a,
0x07,0x05,0x02,0x02,0x40,0x00,0x0a
};
//code_tramsit
void code_transmit(unsigned char code *pRomData,unsigned short len)
{
ControlData.wCount=0;
if(ControlData.wLength>len)
  ControlData.wLength=len;
ControlData.pData=pRomData;
if(ControlData.wLength>=EP0_PACKET_SIZE)
{
  D12_WriteEndpoint(1,EP0_PACKET_SIZE,ControlData.pData);
  ControlData.wCount+=EP0_PACKET_SIZE;
  EA = 0;
  EventFlags.Bits.ControlState=1;
  EA = 1;
}
else
{
  D12_WriteEndpoint(1,ControlData.wLength,pRomData);
  ControlData.wCount+=ControlData.wLength;
  EA = 0;
  EventFlags.Bits.ControlState=0;
  EA = 1;
}
}
//获取描述符
void get_descriptor(void)
{
if(MSB(ControlData.DeviceRequest.wValue)==USB_DEVICE_DESCRIPTOR_TYPE)
{
  code_transmit((unsigned char code*)&DeviceDescr,sizeof(USB_DEVICE_DESCRIPTOR));
  return;
}
if(MSB(ControlData.DeviceRequest.wValue)==USB_CONFIGURATION_DESCRIPTOR_TYPE)
{
  if(ControlData.DeviceRequest.wLength>CONFIG_DESCRIPTOR_LENGTH)
  {
   ControlData.DeviceRequest.wLength=CONFIG_DESCRIPTOR_LENGTH;
   //标识符总大小2E byte,第二次请求时wlength=0x00ff
  }
  //这里的ConfigDescr其实应该包括其他标识符!
  code_transmit((unsigned char code*)&ConfigDescr,ControlData.DeviceRequest.wLength);
  return;
}
}
//single transmit
void single_transmit(unsigned char *buf,unsigned char len)
{
if(len<=EP0_PACKET_SIZE)
{
  D12_WriteEndpoint(1,len,buf);
}
}
//设置地址
void set_address(void)
{
D12_SetAddressEnable((unsigned char)(ControlData.DeviceRequest.wValue&0xff),1);
//比如wValue是"02 00" 应该得到02
single_transmit(0,0);
}

//设置配置
void set_configuration(void)
{
if(ControlData.DeviceRequest.wValue==0)
{
  single_transmit(0,0);
  EventFlags.Bits.Configuration=0;
  D12_SetEndpointEnable(0);
}
else if(ControlData.DeviceRequest.wValue==1)
{
  single_transmit(0,0);
  D12_SetEndpointEnable(0);
  D12_SetEndpointEnable(1);
  EventFlags.Bits.Configuration=1;
}
}
//读取配置
void get_configuration(void)
{
unsigned char c=EventFlags.Bits.Configuration;
single_transmit(&c,1);
}
//读取设备接口信息
void get_interface(void)
{
unsigned char txdat=0;
single_transmit(&txdat,1);
}

static code void (*StandardDeviceRequest[])(void)=
{
0,0,0,0,
0,set_address,get_descriptor,0,
get_configuration,set_configuration,get_interface,0,
0,0,0,0
};

static code void (*VendorDeviceRequest[])(void)=
{
0,0,0,0,
0,0,0,0,
0,0,0,0,
0,0,0,0
};

void ControlHandler(void)
{
unsigned char type,req;
type=ControlData.DeviceRequest.bmRequestType&USB_REQUEST_TYPE_MASK;//0011,0000b
req=ControlData.DeviceRequest.bRequest&USB_REQUEST_MASK;//0000,1111b
if(type==USB_STANDARD_REQUEST)
(*StandardDeviceRequest[req])();
else if(type==USB_VENDOR_REQUEST)
(*VendorDeviceRequest[req])();
}

void USB_ISR(void) interrupt 2
{
unsigned int i_st;
EA = 0;
EventFlags.Bits.InISR=1;
i_st=D12_ReadInterruptRegister();
if(i_st!=0)
{
  if(i_st&D12_INT_ENDP0OUT)
   EP0_Out();
  if(i_st&D12_INT_ENDP0IN)
   EP0_In();
  if(i_st&D12_INT_ENDP1OUT)
   EP1_Out();
  if(i_st&D12_INT_ENDP1IN)
   EP1_In();
  if(i_st&D12_INT_ENDP2OUT)
   EP2_Out();
  if(i_st&D12_INT_ENDP2IN)
   EP2_In();
}
EventFlags.Bits.InISR=0;
EA = 1;
}
//**************************************************************************

#endif

//简单主程序文件，自己按需要改写

#include <REGX51.H>
#include "D12_USB.h"

extern EVENT_FLAGS EventFlags; //事件信号
extern unsigned char idata EndPoint1Buffer[4];

main()
{
ReconnectUSB();
while(1)
{
  if(EventFlags.Bits.SetupPacket)
  {
   EA = 0;
   EventFlags.Bits.SetupPacket = 0;
   ControlHandler();
   EA = 1;
  }
  if(EventFlags.Bits.Timer)
  {
   EventFlags.Bits.Timer = 0;
    }
  if(EventFlags.Bits.Port1RxDone)
  {
   EventFlags.Bits.Port1RxDone = 0;
  }
}
}