51单片机与USB芯片PDIUSBD12接口固件程序

此函数库可以直接使用PHILIPS的Demo驱动D12TEST

以下只用了端点1进行控制传输，端点2的数据传输自己添加，没有使用DMA功能，为简单的固件程序

/**************************************************************************
  
                    PHILIPS PDIUSBD12 FIRMWAR

  
               COPYRIGHT (c)   2005 BY JJJ.
                         --  ALL RIGHTS RESERVED  --
  
   File Name:       D12_USB.h
   Author:          Jiang Jian Jun
   Created:         2005/4/3
   Modified:  NO
   Revision:   1.0
  
***************************************************************************/
#ifndef __D12_USB_H_REVISION_FIRST__
#define __D12_USB_H_REVISION_FIRST__

#include
sbit SUSPEND = P3^5;

#define D12_INT_ENDP0OUT  0x0001   //中断寄存器位定义
#define D12_INT_ENDP0IN   0x0002
#define D12_INT_ENDP1OUT  0x0004
#define D12_INT_ENDP1IN   0x0008
#define D12_INT_ENDP2OUT  0x0010
#define D12_INT_ENDP2IN   0x0020
#define D12_INT_BUSRESET  0x0040
#define D12_INT_SUSPENDCHANGE 0x0080
#define D12_INT_EOT    0x0100

#define D12_SETUPPACKET      0x20  //读最后处理状态寄存器的设置信息包0010,0000b
#define EP0_PACKET_SIZE          16  //p0最大16byte
#define USB_ENDPOINT_DIRECTION_MASK   0x80  //设备请求类型,传输方向 D7 1000,0000b
#define USB_REQUEST_TYPE_MASK     0x30  //bmRequest的设置
#define USB_REQUEST_MASK      0x0f
#define USB_STANDARD_REQUEST     0x00  //5,6位的定义
#define USB_VENDOR_REQUEST      0x20
#define USB_DEVICE_DESCRIPTOR_TYPE    0x01  //描述符类型 设备描述符01h,配置描述符02,接口描述符04,端点描述符05
#define USB_CONFIGURATION_DESCRIPTOR_TYPE  0x02
#define CONFIG_DESCRIPTOR_LENGTH     0x002E  //配置描述符总长度

//**************************************************************************
//Port And Macros And Structure And Union Definitions
#define SWAP(x)   ((((x) & 0x00FF) << 8) | (((x) >> 8) & 0x00FF)) //交换高低8位
#define MSB(x)    (((x) >> 8) & 0x00FF)        //取数据高8位
#define LSB(x)    ((x) & 0x00FF)         //取数据低8位

typedef union _Event_Flags_       //定义USB事件标志数据类型
{
 struct _Bit_Flags_
 {
  unsigned char Timer                : 1; //定时器益出事件标记
  unsigned char BusReset            : 1; //USB总线复位标志
  unsigned char Suspend              : 1; //USB器件挂起标志
  unsigned char SetupPacket       : 1; //收到SETUP包标志
  unsigned char RemoteWakeup      : 1; //远程唤醒标志
  unsigned char InISR          : 1; //USB中断服务标志
  unsigned char ControlState   : 2; //控制端点处理状态
             //0:IDEL     空闲状态
             //1:TRANSMIT 数据发送状态
             //2:RECEIVE  数据接受状态
  
  unsigned char Configuration   : 1; //配置标志 (0:未配置;1:已配置)
  unsigned char Port1RxDone   : 1; //端口1收到数据标志
  unsigned char Port2RxDone   : 1;  //端口2收到数据标志
  unsigned char Port1TxFull        : 1; //端口1输出缓冲区满标志
  unsigned char Port2TxFull   : 1;  //端口2输出缓冲区满标志
  
  unsigned char Reserve    : 3; //保留,未使用
 }Bits;
 unsigned short int Value;
}EVENT_FLAGS;          //事件标志数据类型

typedef struct _DEVICE_REQUEST_
{
 unsigned char bmRequestType;     //请求类型
 unsigned char bRequest;       //USB请求
 unsigned short wValue;       //USB请求值
 unsigned short wIndex;       //USB请求索引
 unsigned short wLength;       //记数长度
}DEVICE_REQUEST;

#define MAX_CONTROLDATA_SIZE 8
typedef struct _control_xfer
{
 DEVICE_REQUEST DeviceRequest;     //USB请求结构体
 unsigned short wLength;       //传输数据的总字节数
 unsigned short wCount;       //传输字节数统计
 unsigned char * pData;       //传输数据指针
 unsigned char dataBuffer[MAX_CONTROLDATA_SIZE]; //请求的数据
}CONTROL_XFER;

static EVENT_FLAGS EventFlags;   //定义为全局变量,用于与主程序的通信
static CONTROL_XFER ControlData;  //保存SETUP包请求类型和请求数据
unsigned char idata EndPoint1Buffer[4]; //控制端点缓存
unsigned char idata EndPoint2Buffer[64];//主端点缓存
//**************************************************************************
//硬件提取层,多路地址/数据总线方式读写
void Outportb(unsigned int Addr, unsigned char Data)
{
 *((unsigned char xdata *) Addr) = Data;
}

unsigned char Inportb(unsigned int Addr)
{
 return *((unsigned char xdata *) Addr);
}

void USB_Delay1ms(unsigned int count)
{
 unsigned int i,j;
 for(i=0;i for(j=0;j<120;j++);
}
//**************************************************************************
#define D12_DATA   0
#define D12_COMMAND  1
//PDIUSBD12命令接口函数
void D12_SetMode(unsigned char bConfig,unsigned char bClkDiv)
{
 Outportb(D12_COMMAND,0xF3);
 Outportb(D12_DATA,bConfig);
 Outportb(D12_DATA,bClkDiv);
}
//设置端点
void D12_SetEndpointStatus(unsigned char bEndp,unsigned char bStalLED)
{
 Outportb(D12_COMMAND,0x40+bEndp);
 Outportb(D12_DATA,bStalled);
}
//应答!!!!!
void D12_AcknowledgeEndpoint(unsigned char endp)
{
 Outportb(D12_COMMAND,endp);
 Outportb(D12_COMMAND,0xF1);
 if(endp==0)
  Outportb(D12_COMMAND,0xF2);
}
//设置地址使能
void D12_SetAddressEnable(unsigned char bAddress,unsigned char bEnable)
{
 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  *(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  *(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  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  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;
 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
#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;
  }
 }
}