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使用51单片机模拟USB键盘原理图(附件里面可以下载清晰版的电路图及完整源码):
单片机源程序:
- /******************************************************************
- 本程序只供学习使用,未经作者许可,不得用于其它任何用途
- 我的邮箱:computer-lov@tom.com
- USBKeyBoard.C file
- 作者:Computer-lov
- 建立日期: 2007.03.20
- 修改日期: 2007.03.23
- 版本:V1.1
- 版权所有,盗版必究。
- Copyright(C) Computer-lov 2007-2017
- All rights reserved
- *******************************************************************/
- #include <AT89x52.H>
- #include "USB.H"
- #include "PDIUSBD12.H"
- #include "My_type.h"
- #include "UART.H"
- #include "key.h"
- #include "keyboard.h"
- #define USB_COMMAND_ADD 1
- #define USB_DATA_ADD 0
- //USB芯片连接引脚
- #define USB_DATA P0
- #define USB_A0 P3_5
- #define USB_WR P3_6
- #define USB_RD P3_7
- #define USB_INT P3_2
- #define ENDPOINT_NUMBER 2
- #define MAX_CONTROL_DATA_SIZE 16
- //控制传输时保存数据
- CONTROL_DATA_BUFF Control_Data;
- //缓冲
- uint8 idata buffer[64];
- //交换数据时用的指针
- uint8 *pData;
- uint8 idle; //空闲状态
- uint8 protocol; //当前协议
- //高低字节交换
- #define SWAP16(x) ((((uint16)(x))<<8)|(((uint16)(x))>>8))
- //取一个整数的低字节
- #define LSB(x) ((uint8)(x))
- //取一个整数的高字节
- #define MSB(x) ((uint8)(((uint16)(x))>>8))
- //字符串描述符所用的语言种类
- code uint8 LANGUAGE_ID[4]={0x04,0x03,0x09,0x04};
- //设备序列号
- code uint8 device_serial_number[]=
- {22,STRING_DESCRIPTOR,'2',0,'0',0,'0',0,'7',0,'-',0,'0',0,'3',0,'-',0,'2',0,'3',0};
- //厂商字符串
- code uint8 ManufacturerString[80]=
- {80,STRING_DESCRIPTOR,0x35,0x75,0x11,0x81,0x08,0x57,0x08,0x57,0x84,0x76,0xB6,0x5B,
- 0x53,0x5F,'-',0x00,'-',0x00,'-',0x00,'-',0x00,'@',0,0x20,0x00,'H',0,'t',0,'t',0,
- 'p',0,':',0,'/',0,'/',0,'C',0,'o',0,'m',0,'p',0,'u',0,'t',0,'e',0,'r',0,'0',0,
- '0',0,'.',0,'2',0,'1',0,'i',0,'c',0,'.',0,'o',0,'r',0,'g',0};
- //产品字符串
- code uint8 ProducterString[80]=
- {80,STRING_DESCRIPTOR,0x35,0x75,0x11,0x81,0x08,0x57,0x08,0x57,0x5A,0x50,0x84,0x76,
- 'U',0,'S',0,'B',0,0x2E,0x95,0xD8,0x76,'@',0,0x20,0x00,'H',0,'t',0,'t',0,
- 'p',0,':',0,'/',0,'/',0,'C',0,'o',0,'m',0,'p',0,'u',0,'t',0,'e',0,'r',0,'0',0,
- '0',0,'.',0,'2',0,'1',0,'i',0,'c',0,'.',0,'o',0,'r',0,'g',0};
- code DEVICE_DESCRIPTOR_STRUCT device_descriptor= //设备描述符
- {
- sizeof(DEVICE_DESCRIPTOR_STRUCT), //设备描述符的字节数大小
- DEVICE_DESCRIPTOR, //设备描述符类型编号
- 0x1001, //USB版本号
- 0x00, //USB分配的设备类代码
- 0x00, //USB分配的子类代码
- 0x00, //USB分配的设备协议代码
- 0x10, //端点0的最大包大小
- 0x3412, //厂商编号VID,这里只是作为测试用,请使用自己的VID
- 0x7856, //产品编号PID,这里只是作为测试用,请使用自己的PID
- 0x0100, //设备出厂编号
- 0x01, //设备厂商字符串的索引
- 0x02, //描述产品字符串的索引
- 0x03, //描述设备序列号字符串的索引
- 0x01 //可能的配置数量
- };
- //定义配置,接口,端点等描述符结构体,因为它们是随配置描述符一起返回的
- typedef struct _CON_INT_ENDP_DESCRIPTOR_STRUCT
- {
- CONFIGURATION_DESCRIPTOR_STRUCT configuration_descriptor;
- INTERFACE_DESCRIPTOR_STRUCT interface_descriptor;
- HID_DESCRIPTOR_STRUCT hid_descriptor;
- ENDPOINT_DESCRIPTOR_STRUCT endpoint_descriptor[ENDPOINT_NUMBER];
- }CON_INT_ENDP_DESCRIPTOR_STRUCT;
- code CON_INT_ENDP_DESCRIPTOR_STRUCT con_int_endp_descriptor=
- {
- //configuration_descriptor //配置描述符
- {
- sizeof(CONFIGURATION_DESCRIPTOR_STRUCT), //配置描述符的字节数大小
- CONFIGURATION_DESCRIPTOR, //配置描述符类型编号
- SWAP16(sizeof(CON_INT_ENDP_DESCRIPTOR_STRUCT)),
- 0x01, //只包含一个接口
- 0x01, //该配置的编号
- 0x00, //iConfiguration字段
- 0xA0, //采用总线供电,支持远程唤醒
- 0xC8 //从总线获取最大电流400mA
- },
- //interface_descritor //接口描述符
- {
- sizeof(INTERFACE_DESCRIPTOR_STRUCT), //接口描述符的字节数大小
- INTERFACE_DESCRIPTOR, //接口描述符类型编号
- 0x00, //接口编号为0
- 0x00, //该接口描述符的编号
- ENDPOINT_NUMBER, //非0端点数量为2,只使用端点主端点输入和输出
- 0x03, //人机接口设备(HID)类
- 0x01, //使用的子类:支持BIOS根启动Boot的子类
- 0x01, //使用的协议:键盘
- 0x00 //接口描述符字符串索引
- },
- //hid_descriptor
- {
- sizeof(HID_DESCRIPTOR_STRUCT), //HID描述符的字节数大小
- HID_DESCRIPTOR, //HID描述符类型编号
- 0x1001, //HID类协议版本号,为1.1
- 0x21, //固件的国家地区代号,0x21为美国
- NUM_SUB_DESCRIPTORS, //下级描述符的数量
- {
- {
- REPORT_DESCRIPTOR, //下级描述符为报告描述符
- SWAP16(sizeof(KeyBoardReportDescriptor)) //下级描述符的长度
- }
- },
- },
- //endpoint_descriptor[]
- {
- { //主端点输入描述
- sizeof(ENDPOINT_DESCRIPTOR_STRUCT), //端点描述符的字节数大小
- ENDPOINT_DESCRIPTOR, //端点描述符类型编号
- MAIN_POINT_IN, //端点号,主输入端点
- ENDPOINT_TYPE_INTERRUPT, //使用的传输类型:中断传输
- 0x4000, //该端点支持的最大包尺寸,64字节
- 0x0A //中断扫描时间:设置为10ms
- },
-
- { //主端点输出描述
- sizeof(ENDPOINT_DESCRIPTOR_STRUCT), //端点描述符的字节数大小
- ENDPOINT_DESCRIPTOR, //端点描述符类型编号
- MAIN_POINT_OUT, //端点号,主输出端点
- ENDPOINT_TYPE_INTERRUPT, //使用的传输类型:中断传输
- 0x4000, //该端点支持的最大包尺寸,64字节
- 0x0A //中断扫描时间:设置为10ms
- }
- }
- };
- union //程序标志位
- {
- uint16 Register;
- struct
- {
- uint8 bus_reset :1;
- uint8 suspend :1;
- uint8 remote_wakeup :1;
- uint8 int_isr :1;
- uint8 not_end :1;
- uint8 usb_idle :1;
- uint8 usb_busy :1;
- uint8 setup_packet_in :1;
- uint8 setup_packet_out :1;
- uint8 set_addr :1;
- uint8 usb_endp0_in :1;
- uint8 usb_endp2_in :1;
- uint8 usb_endp2_out :1;
- }flags;
- }usb_flags;
- union //中断寄存器
- {
- uint8 Register[2];
- struct
- {
- uint8 control_out_port :1;
- uint8 control_in_port :1;
- uint8 port_out_1 :1;
- uint8 port_in_1 :1;
- uint8 main_out_port :1;
- uint8 main_in_port :1;
- uint8 bus_reset :1;
- uint8 suspend_change :1;
- uint8 DMA_EOT :1;
- uint8 not_use :7;
- }Interrupt;
- }Interrupt_Register;
- union //端点最后处理状态
- {
- uint8 Register;
- struct
- {
- uint8 successful :1;
- uint8 error_code :4;
- uint8 setup_packet :1;
- uint8 data_1 :1;
- uint8 prestatus_not_read :1;
- }Status;
- }Last_Status;
- /***************** 延时x毫秒函数 ***********/
- void delay(uint16 x)
- {
- uint16 i;
- uint16 j;
- for(i=0;i<x;i++)
- for(j=0;j<230;j++);
- }
- /********************************************/
- /*******************************写USB命令******************************************/
- void write_usb_command(uint8 usb_command)
- {
- USB_A0=USB_COMMAND_ADD;
- USB_DATA=usb_command;
- USB_WR=0;
- USB_WR=1;
- USB_DATA=0xFF;
- }
- /******************************************************************************/
- /*********************写一字节USB数据*******************************************/
- void write_a_usb_data(uint8 usb_data)
- {
- USB_A0=USB_DATA_ADD;
- USB_DATA=usb_data;
- USB_WR=0;
- USB_WR=1;
- USB_DATA=0XFF;
- }
- /******************************************************************************/
- /****************************读一字节USB数据************************************/
- uint8 read_a_usb_data(void)
- {
- uint8 temp;
- USB_A0=USB_DATA_ADD;
- USB_RD=0;
- temp=USB_DATA;
- USB_RD=1;
- return temp;
- }
- /******************************************************************************/
- /************************读USB中断寄存器**************************************/
- void read_interrupt_register(void)
- {
- write_usb_command(Read_Interrupt_Register);
- Interrupt_Register.Register[0]=read_a_usb_data();
- Interrupt_Register.Register[1]=read_a_usb_data();
- }
- /******************************************************************************/
- /************************设置USB地址*******************************************/
- void set_usb_addr(uint8 addr)
- {
- write_usb_command(Set_Address);
- write_a_usb_data(0x80|addr);
- Prints(" 设置地址.....................",1);
- Prints(" 地址为: ",0);
- PrintLongInt(addr);
- Prints("",1);
- }
- /******************************************************************************/
- /*************************端点使能******************************************/
- void set_endpoint_enable(void)
- {
- write_usb_command(Set_Endpoint_Enable);
- write_a_usb_data(0x01);
- }
- /******************************************************************************/
- /****************************选择终端点*************************************/
- uint8 select_endpoint(uint8 endp)
- {
- write_usb_command(Select_EndPoint+endp);
- return read_a_usb_data();
- }
- /******************************************************************************/
- /****************************读端点最后状态**********************************/
- uint8 read_last_status(uint8 endp)
- {
- write_usb_command(Read_Last_Status+endp);
- return read_a_usb_data();
- }
- /******************************************************************************/
- /****************************设置端点状态**************************************/
- void set_endpoint_status(uint8 endp,uint8 status)
- {
- write_usb_command(0x40+endp);
- write_a_usb_data(!status);
- }
- /******************************************************************************/
- /*****************************读端点状态**************************************/
- uint8 read_endpoint_status(uint8 endp)
- {
- write_usb_command(0x80+endp);
- return read_a_usb_data();
- }
- /******************************************************************************/
- /************************清缓冲,在读取缓冲数据后调用**************************/
- void clear_buffer(void)
- {
- write_usb_command(Clear_Buffer);
- }
- /******************************************************************************/
- /***********************缓冲区数据有效,在写缓冲后调用**************************/
- void validate_buffer(void)
- {
- write_usb_command(Validate_Buffer);
- }
- /******************************************************************************/
- /***************************应答建立包************************************/
- void ack_setup(uint8 endp)
- {
- select_endpoint(endp);
- write_usb_command(Ack_Setup);
- }
- /******************************************************************************/
- /***********************出错处理******************************************/
- void error(uint8 number)
- {
- Prints("有错误发生!!!",1);
- number=0;
- }
- /******************************************************************************/
- /*************************读终端点缓冲****************************************/
- uint8 read_endpoint_buff(uint8 endp,uint8 len,uint8 * buff)
- {
- uint8 i,j;
- read_last_status(endp);
- if(!(select_endpoint(endp))&0x01){error(0); return 0;}
- read_endpoint_status(endp);
- write_usb_command(Read_Buffer);
- read_a_usb_data();
- j=read_a_usb_data();
- if(j>len)
- j=len;
- for(i=0;i<j;i++)
- {
- USB_RD=0;
- *(buff+i)=USB_DATA;
- USB_RD=1;
- }
- clear_buffer();
- return j;
- }
- /******************************************************************************/
- /*************************写终端点缓冲*****************************************/
- uint8 write_endpoint_buff(uint8 endp,uint8 len,uint8 * buff)
- {
- uint8 i;
- read_last_status(endp);
- select_endpoint(endp);
- write_usb_command(Write_Buffer);
- write_a_usb_data(0);
- write_a_usb_data(len);
- for(i=0;i<len;i++)
- {
- USB_DATA=*(buff+i);
- USB_WR=0;
- USB_WR=1;
- }
- USB_DATA=0XFF;
- validate_buffer();
- return len;
- }
- /******************************************************************************/
- /***************************断开USB连接****************************************/
- void disconnect_usb(void)
- {
- Prints("断开USB连接........................",1);
- write_usb_command(0xf3);
- write_a_usb_data(0x0e);
- write_a_usb_data(0x47);
- delay(100);
- }
- /******************************************************************************/
- /*******************************连接USB**************************************/
- void connect_usb(void)
- {
- Prints("连接USB...............",1);
- write_usb_command(0xf3); //初始化USBD12
- write_a_usb_data(0x1e); //连接USB
- write_a_usb_data(0x47); //设置频率
- }
- /******************************************************************************/
- /***************************初始化USB***************************************************/
- void init_usb(void)
- {
- Prints("USBD12芯片初始化",1);
- set_usb_addr(0);
- set_endpoint_enable();
- }
- /******************************************************************************/
- /****************************USB总线复位处理***********************************/
- void usb_bus_reset(void)
- {
- Prints("USB总线复位................................",1);
- usb_flags.Register=0;
- set_endpoint_enable();
- }
- /******************************************************************************/
- /*****************************USB总线挂起处理**********************************/
- void usb_bus_suspend(void)
- {
- Prints("USB总线挂起................................",1);
- }
- /******************************************************************************/
- /***************************设置地址***************************************/
- void set_usb_address(void)
- {
- usb_flags.flags.set_addr=1;
- while(select_endpoint(1)&0x01);
- write_endpoint_buff(1,0,0);
- set_usb_addr(Control_Data.DeviceRequest.wValue);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /**************************获取状态响应*****************************************/
- void get_status(uint8 receiver)
- {
- uint8 status[2];
- switch (receiver)
- {
- case 0: //获取设备状态
- status[0]=0x00;
- status[1]=0x00;
- break;
- case 1: //获取接口状态
- status[0]=0x00;
- status[0]=0x00;
- break;
- case 2: //获取端点状态
- status[0]=0x00;
- status[1]=0x00;
- break;
- }
- write_endpoint_buff(1,2,status);
- usb_flags.flags.usb_endp0_in=0;
- }
- /******************************************************************************/
- /*********************清除特性*******************************************/
- void clear_feature(uint8 receiver)
- {
- Prints(" 清除特性................................",1);
- receiver=0;
- write_endpoint_buff(1,0,0);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /*******************设置特性**************************************************/
- void set_feature(uint8 receiver)
- {
- Prints(" 设置特性................................",1);
- receiver=0;
- write_endpoint_buff(1,0,0);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /*****************************设置描述*****************************************/
- void set_descriptor(void)
- {
- Prints(" 设置描述符................................",1);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /***************************设置配置*******************************************/
- void set_configuration(void)
- {
- Prints(" 设置配置................................",1);
- write_endpoint_buff(1,0,0);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /************************获取配置状态******************************************/
- void get_configuration(void)
- {
- uint8 value=0x01;
- Prints(" 获取配置................................",1);
- write_endpoint_buff(1,1,&value);
- usb_flags.flags.usb_endp0_in=0;
- }
- /******************************************************************************/
- /****************************设置接口************************************/
- void set_interface(void)
- {
- Prints(" 设置接口................................",1);
- write_endpoint_buff(1,0,0);
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /***************************获取接口状态***************************************/
- void get_interface(void)
- {
- uint8 value=0x01;
- Prints(" 获取接口................................",1);
- write_endpoint_buff(1,1,&value);
- usb_flags.flags.usb_endp0_in=0;
- }
- /******************************************************************************/
- /***********************获取描述符*********************************************/
- void get_descriptor(void)
- {
- Prints(" 获取描述符................................",1);
- if(!usb_flags.flags.not_end)
- {
- switch(MSB(Control_Data.DeviceRequest.wValue))
- {
- case DEVICE_DESCRIPTOR:
- Prints(" 获取设备描述符................................",1);
- Control_Data.wCount=sizeof(DEVICE_DESCRIPTOR_STRUCT);
- Control_Data.pData=(uint8 *)(&device_descriptor);
- break;
- case CONFIGURATION_DESCRIPTOR:
- Prints(" 获取配置描述符................................",1);
- Control_Data.wCount=SWAP16(con_int_endp_descriptor.configuration_descriptor.wTotalLength);
- Control_Data.pData=(uint8 *)(&con_int_endp_descriptor);
- if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
- break;
- case STRING_DESCRIPTOR:
- Prints(" 获取字符串描述符................................",1);
- switch(LSB(Control_Data.DeviceRequest.wValue))
- {
- case 0:
- Prints(" 获取语言ID................................",1);
- Control_Data.wCount=LANGUAGE_ID[0];
- Control_Data.pData=LANGUAGE_ID;
- break;
- case 1:
- Prints(" 获取厂商字符串................................",1);
- Control_Data.wCount=ManufacturerString[0];
- Control_Data.pData=ManufacturerString;
- break;
- case 2:
- Prints(" 获取产品字符串................................",1);
- Control_Data.wCount=ProducterString[0];
- Control_Data.pData=ProducterString;
- break;
- case 3:
- Prints(" 获取设备序列号................................",1);
- Control_Data.wCount=device_serial_number[0];
- Control_Data.pData=device_serial_number;
- break;
- default: break;
- }
- break;
- default:
- Prints(" 获取其它描述符..................描述符索引为:",0);
- PrintLongInt(MSB(Control_Data.DeviceRequest.wValue));
- Prints("",1);
- break;
- }
- if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
- }
- //写数据到D12输入端点
- if(Control_Data.wCount>=MAX_CONTROL_DATA_SIZE)
- {
- write_endpoint_buff(1,MAX_CONTROL_DATA_SIZE,Control_Data.pData);
- Control_Data.pData+=MAX_CONTROL_DATA_SIZE;
- Control_Data.wCount-=MAX_CONTROL_DATA_SIZE;
- if(usb_flags.flags.set_addr)usb_flags.flags.not_end=1;
- else usb_flags.flags.usb_endp0_in=0;
- return;
- }
- else
- {
- write_endpoint_buff(1,Control_Data.wCount,Control_Data.pData);
- usb_flags.flags.setup_packet_in=0;
- usb_flags.flags.usb_endp0_in=0;
- return;
- }
- }
- /******************************************************************************/
- /*********************发到接口的获取描述符**************************************/
- void get_descriptor_interface(void)
- {
- Prints(" 获取描述符(从接口)..............................",1);
- if(!usb_flags.flags.not_end)
- {
- switch(MSB(Control_Data.DeviceRequest.wValue))
- {
- case HID_DESCRIPTOR:
- Prints(" 获取HID描述符................................",1);
- Control_Data.wCount=sizeof(HID_DESCRIPTOR_STRUCT);
- //Control_Data.pData=(uint8 *)(&hid_descriptor);
- break;
- case REPORT_DESCRIPTOR:
- Prints(" 获取报告描述符................................",1);
- Control_Data.wCount=SWAP16(sizeof(KeyBoardReportDescriptor));
- Control_Data.pData=(uint8 *)(KeyBoardReportDescriptor);
- if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
- break;
- case PHYSICAL_DESCRIPTOR:
- Prints(" 获取物理描述符................................",1);
- break;
- default:
- Prints(" 获取其它描述符..................描述符索引为:",0);
- PrintLongInt(MSB(Control_Data.DeviceRequest.wValue));
- Prints("",1);
- break;
- }
- if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
- }
- //写数据到D12输入端点
- if(Control_Data.wCount>=MAX_CONTROL_DATA_SIZE)
- {
- write_endpoint_buff(1,MAX_CONTROL_DATA_SIZE,Control_Data.pData);
- Control_Data.pData+=MAX_CONTROL_DATA_SIZE;
- Control_Data.wCount-=MAX_CONTROL_DATA_SIZE;
- if(usb_flags.flags.set_addr)usb_flags.flags.not_end=1;
- else usb_flags.flags.usb_endp0_in=0;
- return;
- }
- else
- {
- write_endpoint_buff(1,Control_Data.wCount,Control_Data.pData);
- usb_flags.flags.setup_packet_in=0;
- usb_flags.flags.usb_endp0_in=0;
- return;
- }
- }
- /******************************************************************************/
- /************************终端点0输出中断处理************************************/
- void endp0_out(void)
- {
- Last_Status.Register=read_last_status(0);
- if(Last_Status.Status.setup_packet)
- {
- Control_Data.wLength=0;
- Control_Data.wCount=0;
- if(read_endpoint_buff(0,sizeof(Control_Data.DeviceRequest),(uint8 *)(&(Control_Data.DeviceRequest)))!=sizeof(REQUESTCMD))
- {
- set_endpoint_status(0,0);
- set_endpoint_status(1,0);
- return;
- }
- Control_Data.DeviceRequest.wValue=SWAP16(Control_Data.DeviceRequest.wValue);
- Control_Data.DeviceRequest.wIndex=SWAP16(Control_Data.DeviceRequest.wIndex);
- Control_Data.DeviceRequest.wLength=SWAP16(Control_Data.DeviceRequest.wLength);
- ack_setup(0);
- ack_setup(1);
- Control_Data.wLength=Control_Data.DeviceRequest.wLength;
- usb_flags.flags.not_end=0;
- usb_flags.flags.usb_endp0_in=1;
- usb_flags.flags.setup_packet_in=0;
- usb_flags.flags.setup_packet_out=0;
- if(Control_Data.DeviceRequest.bmRequestType&0x80){usb_flags.flags.setup_packet_in=1;return;}
- else {usb_flags.flags.setup_packet_out=1;return;}
- }
- else
- {
- select_endpoint(0);
- clear_buffer();
- }
- }
- /******************************************************************************/
- /***********************获取报告*********************************************/
- void get_report(void)
- {
- Prints(" 获取报告................................",1);
- }
- /******************************************************************************/
- /**********************获取空闲状态*********************************************/
- void get_idle(void)
- {
- Prints(" 获取空闲................................",1);
- write_endpoint_buff(1,1,&idle);
- usb_flags.flags.usb_endp0_in=0;
- }
- /******************************************************************************/
- /*************************获取协议**********************************************/
- void get_protocol(void)
- {
- Prints(" 获取协议................................",1);
- write_endpoint_buff(1,1,&protocol);
- usb_flags.flags.usb_endp0_in=0;
- }
- /******************************************************************************/
- /***********************设置报告***********************************************/
- void set_report(void)
- {
- Prints(" 设置报告................................",1);
- }
- /******************************************************************************/
- /***********************设置空闲***********************************************/
- void set_idle(void)
- {
- Prints(" 设置空闲................................",1);
- while(select_endpoint(1)&0x01);
- write_endpoint_buff(1,0,0);
- idle=Control_Data.DeviceRequest.wValue;
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /**********************设置协议**************************************************/
- void set_protocol(void)
- {
- Prints(" 设置协议................................",1);
- while(select_endpoint(1)&0x01);
- write_endpoint_buff(1,0,0);
- protocol=Control_Data.DeviceRequest.wValue;
- usb_flags.flags.usb_endp0_in=0;
- usb_flags.flags.setup_packet_out=0;
- }
- /******************************************************************************/
- /****************************终端点0输入处理**************************************/
- void endp0_in(void)
- {
- read_last_status(1);
- //如果是输入请求包
- if(usb_flags.flags.setup_packet_in||usb_flags.flags.not_end)
- {
- switch(Control_Data.DeviceRequest.bmRequestType&0x60)
- {
- case 0x00: //标准请求
- Prints("USB标准请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //到设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case 0: get_status(0);break;
- case 6: get_descriptor();break;
- case 8: get_configuration();break;
- default:break;
- }
- break;
- case 1: //到接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case 0: get_status(1);break;
- case 6: get_descriptor_interface();break;
- case 10: get_interface();break;
- default: break;
- }
- break;
- case 2: //到端点
- {
- if(Control_Data.DeviceRequest.bRequest==0)get_status(2);
- }
- default: break;
- }
- break;
- case 0x20: //类请求
- Prints("USB类请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //到设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default:break;
- }
- break;
- case 1: //到接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case GET_REPORT: get_report(); break; //获取报告
- case GET_IDLE: get_idle(); break; //获取空闲状态
- case GET_PROTOCOL: get_protocol(); break; //获取协议
- default: break;
- }
- break;
- case 2: //到端点
- {
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- }
- default: break;
- }
- break;
- case 0x40: //用户请求
- Prints("USB用户请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //到设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
- case 1: //到接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
- case 2: //到端点
- {
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- }
- default: break;
- }
- }
- return;
- }
- //如果是输出请求包
- if(usb_flags.flags.setup_packet_out)
- {
- switch(Control_Data.DeviceRequest.bmRequestType&0x60)
- {
- case 0x00: //标准请求
- Prints("USB标准请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //到设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case CLEAR_FEATURE: clear_feature(0);break;
- case SET_FEATURE: set_feature(0);break;
- case SET_ADDRESS: set_usb_address();break; //set_address
- case SET_DESCRIPTOR: set_descriptor();break; //set_descriptor
- case SET_CONFIGURATION: set_configuration(); break; //set_configurat
- default: break;
- }
- break;
-
- case 1: //到接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case CLEAR_FEATURE: clear_feature(1);break;
- case SET_FEATURE: set_feature(1); break;
- case SET_INTERFACE: set_interface();break;
- default: break;
- }
- break;
-
- case 2: //到端点
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case CLEAR_FEATURE: clear_feature(2);break;
- case SET_FEATURE: set_feature(2);break;
- default: break;
- }
- break;
- default: break;
- }
- break;
- case 0x20: //类请求
- Prints("USB类请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //接收者为设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
- case 1: //接收者为接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- case SET_REPORT: set_report(); break; //设置报告
- case SET_IDLE: set_idle(); break; //设置空闲
- case SET_PROTOCOL: set_protocol(); break; //设置协议
- default: break;
- }
-
- break;
- case 2: //接收者为端点
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
-
- case 3: //其它接收者
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }break;
-
- default: break;
- }
- break;
- case 0x40: //用户请求
- Prints("USB用户请求................................",1);
- switch(Control_Data.DeviceRequest.bmRequestType&0x1F)
- {
- case 0: //接收者为设备
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
-
- case 1: //接收者为接口
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
-
- case 2: //接收者为端点
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
-
- case 3: //其它接收者
- switch (Control_Data.DeviceRequest.bRequest)
- {
- default: break;
- }
- break;
-
- default: break;
- }
- }
- }
- }
- /******************************************************************************/
- /**********************端点1输出***********************************************/
- /*void endp1_out(void)
- {
- Prints("端点1输出................................",1);
- }*/
- /******************************************************************************/
- /*************************端点1输入*****************************************/
- /*void endp1_in(void)
- {
- Prints("端点1输入................................",1);
- }*/
- /******************************************************************************/
- /***************************端点2输出****************************************/
- void endp2_out(void)
- {
- uint8 i,j;
- j=read_endpoint_buff(4,64,buffer);
- P2=~buffer[0];
- Prints("端点2输出................................",1);
- Prints(" 端点2的数据是 ",0);
- for(i=0;i<j;i++)
- {
- PrintHex(buffer[i]);
- if(i==16)Prints("",1);
- }
- Prints("",1);
- }
- /******************************************************************************/
- //用来返回数据的缓冲
- uint8 idata InBuffer[64];
- /***************************统计x中有多少个bit为1*******************************/
- uint8 Count1Bits(uint16 x)
- {
- uint8 i;
- i=0;
- while(x)
- {
- if(x&0x8000)i++;
- x<<=1;
- }
- return i;
- }
- /******************************************************************************/
- /****************************主端点输入处理************************************/
- void endp2_in(void)
- {
- uint8 i;
- // Prints("端点2输入................................",1);
- KeyMapCanChange=0; //禁止修改按键值
- if(KeyMapOk) //如果有按键按下
- {
- //4*4的键盘,最多能够识别3个键同时按下,
- //如果开关上接二极管可以同时识别更多的键
- if(Count1Bits(KeyMapOk)>3)
- {
- for(i=2;i<8;i++)InBuffer[i]=0x01; //按键过多
- }
- else
- {
- if(KeyMapOk&(1<<3)) //左Ctrl键
- {
- InBuffer[0]|=1;
- }
- else
- {
- InBuffer[0]&=~1;
- }
-
- if(KeyMapOk&(1<<7)) //左shift键
- {
- InBuffer[0]|=1<<1;
- }
- else
- {
- InBuffer[0]&=~(1<<1);
- }
-
- if(KeyMapOk&(1<<2)) //左ALT键
- {
- InBuffer[0]|=1<<2;
- }
- else
- {
- InBuffer[0]&=~(1<<2);
- }
- i=2;
- if(KeyMapOk&(1))
- {
- InBuffer[i++]=0x28; //回车键
- }
- if(KeyMapOk&(1<<1))
- {
- InBuffer[i++]=0x62; //0键
- }
- if(KeyMapOk&(1<<4))
- {
- InBuffer[i++]=0x5B; //3键
- }
- if(KeyMapOk&(1<<5))
- {
- InBuffer[i++]=0x5A; //2键
- }
- if(KeyMapOk&(1<<6))
- {
- InBuffer[i++]=0x59; //1键
- }
- if(KeyMapOk&(1<<8))
- {
- InBuffer[i++]=0x5E; //6键
- }
- if(KeyMapOk&(1<<9))
- {
- InBuffer[i++]=0x5D; //5键
- }
- if(KeyMapOk&(1<<10))
- {
- InBuffer[i++]=0x5C; //4键
- }
- if(KeyMapOk&(1<<11))
- {
- InBuffer[i++]=0x39; //Caps Lock键
- }
- if(KeyMapOk&(1<<12))
- {
- InBuffer[i++]=0x61; //9键
- }
- if(KeyMapOk&(1<<13))
- {
- InBuffer[i++]=0x60; //8键
- }
- if(KeyMapOk&(1<<14))
- {
- InBuffer[i++]=0x5F; //2键
- }
- if(KeyMapOk&(1<<15))
- {
- InBuffer[i++]=0x53; //Num Lock键
- }
- for(;i<8;i++)
- {
- InBuffer[i]=0; //多余的清0
- }
- }
- }
- else //如果无按键按下,则返回0
- {
- for(i=0;i<8;i++)
- {
- InBuffer[i]=0;
- }
- }
- KeyMapCanChange=1; //允许修改按键值
- //返回8个字节数据
- write_endpoint_buff(5,8,InBuffer);
- }
- /******************************************************************************/
- /***************************主函数**********************************************/
- void main(void)
- {
- InitUART(); //串口初始化
- Printc(0x0c); //清屏
- Printc(0x0c);
- Prints("系统启动................................",1);
- delay(1000); //延迟
- disconnect_usb(); //断开USB连接
- init_usb(); //初始化USB芯片
- connect_usb(); //连接USB
- InitTimer0(); //定时器0初始化,用来做键盘扫描,定时时间大约为5ms
- …………限于本文篇幅 余下代码请从51黑下载附件…………
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