d12_no_dma.c

这是菲利普公司USB主控芯片PDIUSBD12在C51上的源代码

51单片机与USB芯片PDIUSBD12接口固件程序
关键词： USB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 FIRMWARE
  
               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 <REGX51.H>
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    //setup包数据缓冲区
{
 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
//向D12发送数据或命令的子程序
void Outportb(unsigned int Addr, unsigned char Data)
{
 *((unsigned char xdata *) Addr) = Data;
}
//从D12读取数据的子程序
unsigned char Inportb(unsigned int Addr)
{
 return *((unsigned char xdata *) Addr);
}
//延时1ms
void USB_Delay1ms(unsigned int count)
{
 unsigned int i,j;
 for(i=0;i<count;i++)
 for(j=0;j<120;j++);
}
//**************************************************************************
//PDIUSBD12命令接口函数
#define D12_DATA   0
#define D12_COMMAND  1
void D12_SetMode(unsigned char bConfig,unsigned char bClkDiv)
{
 Outportb(D12_COMMAND,0xF3);
 Outportb(D12_DATA,bConfig);
 Outportb(D12_DATA,bClkDiv);
}

//设置端点状态
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);
}

//读端点数据
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;
}
//把数据写入端点
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;
}
//断开USB
void DisconnectUSB(void)
{
 D12_SetMode(0x02,0x03);//SET TO ONE? by newer
}
//初始化USB
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;
}
//连接USB
void ConnectUSB(void)
{
 EventFlags.Value = 0x0000;
 InitialUSBInt();
 D12_SetMode(0x16,0x03);
}
//重新连接USB
void ReconnectUSB(void)
{
 SUSPEND = 0;
 DisconnectUSB();
 USB_Delay1ms(1000);
 ConnectUSB();
}
//**************************************************************************
//中断服务程序
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;
}
//端点0OUT中断
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