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 FIRMWARECOPYRIGHT (c) 2005 BY JJJ.-- ALL RIGHTS RESERVED --File Name: D12_USB.hAuthor: Jiang Jian JunCreated: 2005/4/3Modified: NORevision: 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D 7 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 8typedef 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<count;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);elseOutportb(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,un signed char *buf){unsigned char i,j;Outportb(D12_COMMAND,endp);if((Inportb(D12_DATA)&0xff)==0)//" define D12_FULLEMPTY as 0xFF by newerreturn 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 le n,unsigned char *buf){unsigned char i,j;Outportb(D12_COMMAND,endp);if((Inportb(D12_DATA)&0xff)==0)//" define D12_FULLEMPTY as 0xFF by newerreturn 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,un signed 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 le n,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 symbolif(ep_last&D12_SETUPPACKET){ //recieved SETUP packet ---by newerControlData.wLength=0;ControlData.wCount=0;if(D12_ReadEndpoint_Int(0,sizeof(ControlData.DeviceRequest),(unsigned ch ar *)(&(ControlData.DeviceRequest)))!=sizeof(DEVICE_REQUEST)){D12_SetEndpointStatus(0,1);D12_SetEndpointStatus(1,1);EventFlags.Bits.ControlState=0; //should define USB_IDLE first --by newerreturn;}acket=1;EventFlags.Bits.ControlState=0; //by newer}else{if(ControlData.DeviceRequest.wLength>16)//最大传16byte{EventFlags.Bits.ControlState=0; //by newerD12_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+Con trolData.wCount);ControlData.wCount+=i;if(i!=EP0_PACKET_SIZE||ControlData.wCount>=ControlData.wLength){EventFlags.Bits.SetupPacket=1;EventFlags.Bits.ControlState=0;}}elseEventFlags.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+ControlDat a.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),EndPoint1Buffe r);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_tramsitvoid 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_T YPE){code_transmit((unsigned char code*)&DeviceDescr,sizeof(USB_DEVICE_DE SCRIPTOR));return;}if(MSB(ControlData.DeviceRequest.wValue)==USB_CONFIGURATION_DESCR IPTOR_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.DeviceRequ est.wLength);return;}}//single transmitvoid 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02single_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_MA SK;//0011,0000breq=ControlData.DeviceRequest.bRequest&USB_REQUEST_MASK;//0000,11 11bif(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; }}}那么可以写5个函数：void print();void copy();void delete();void quit();void help();然后用一个函数指针数组把他们存在一起：void (*p[])() = {print, copy, delete, quit, help}; 然后根据用户入0,1,2,3,4来直接叫函数cin >> index;p[index]();。
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