main.c

这是一个用AT89C5131做的USB接口键盘。有电路图和源程序。非常有应用价值的一个资料

#include "usb_task.h"
#include "usb_kbd_enum.h"
#include "ext_5131.h"
#include "reg_5131.h"
//////////////////////////////
code struct usb_st_device_descriptor usb_device_descriptor =
{
  sizeof(usb_device_descriptor), 0x01, 0x1001, 0,
  0, 0, 32, 0xeb03, 0x0320,
  0x0001, 0x01, 0x02, 0x03, 1
};
/*STRING描述符*/
code struct usb_st_manufacturer usb_manufacturer =
{ sizeof(usb_manufacturer),  0x03, {'X'<<8, 'I'<<8, 'N'<<8, 'Z'<<8, 'X'<<8} };

code struct usb_st_product usb_product =
{ sizeof(usb_product),       0x03, {'A'<<8, 'T'<<8, '8'<<8, '9'<<8, 'C'<<8, '5'<<8, '1'<<8, \
                               '3'<<8, '1'<<8, ' '<<8, \
                               'H'<<8, 'I'<<8, 'D'<<8, ' '<<8, \
                               'K'<<8, 'e'<<8, 'y'<<8, 'b'<<8, 'o'<<8, 'a'<<8, 'r'<<8,'d'<<8} };

code struct usb_st_serial_number usb_serial_number =
{ sizeof(usb_serial_number), 0x03, {'1'<<8, '.'<<8, '2'<<8, '.'<<8, '3'<<8} };

code struct usb_st_language_descriptor usb_language =
{ sizeof(usb_language),      STRING, 0x0904 };
/*配置描述符集合*/
code struct  
{ struct usb_st_configuration_descriptor  cfg;
  struct usb_st_interface_descriptor      ifc;
  struct usb_st_hid_descriptor            hid ;
  struct usb_st_endpoint_descriptor       ep1 ;
  unsigned char                           rep[0x3b] ;
}
  usb_configuration =
  {
    { 9, 0x02, 0x2200, 1, 1,0, 0x80, 50},
    { 9, 0x04, 1, 0, 1, 0x03, 0, 0, 0 },
    { 9, 0x21, 0x1101, 8, 1, 0x22, 0x3B00 },
    { 7, 0x05, 0x81, 0x03, 32, 0x20 },
    { 0x05,0x01,          /* Usage Page (Generic Desktop)      */        
      0x09,0x06,          /* Usage (Keyboard)                  */
      0xA1,0x01,          /* Collection (Application)          */
      0x05,0x07,          /* Usage Page (Keyboard)             */
      0x19,224,           /* Usage Minimum (224)               */
      0x29,231,           /* Usage Maximum (231)               */
      0x15,0x00,          /* Logical Minimum (0)               */
      0x25,0x01,          /* Logical Maximum (1)               */
      0x75,0x01,          /* Report Size (1)                   */
      0x95,0x08,          /* Report Count (8)                  */
      0x81,0x02,          /* Input (Data, Variable, Absolute)  */
      0x81,0x01,          /* Input (Constant)                  */
      0x19,0x00,          /* Usage Minimum (0)                 */
      0x29,101,           /* Usage Maximum (101)               */
      0x15,0x00,          /* Logical Minimum (0)               */
      0x25,101,           /* Logical Maximum (101)             */
      0x75,0x08,          /* Report Size (8)                   */
      0x95,0x06,          /* Report Count (6)                  */
      0x81,0x00,          /* Input (Data, Array)               */
      0x05,0x08,          /* Usage Page (LED)                  */
      0x19,0x01,          /* Usage Minimum (1)                 */
      0x29,0x05,          /* Usage Maximum (5)                 */
      0x15,0x00,          /* Logical Minimum (0)               */
      0x25,0x01,          /* Logical Maximum (1)               */
      0x75,0x01,          /* Report Size (1)                   */
      0x95,0x05,          /* Report Count (5)                  */
      0x91,0x02,          /* Output (Data, Variable, Absolute) */
      0x95,0x03,          /* Report Count (3)                  */
      0x91,0x01,          /* Output (Constant)                 */
      0xC0                /* End Collection                    */  
      }
  };
unsigned char key[4][4]={HID_W,HID_E,HID_L,HID_C,
                 HID_O,HID_M,HID_E,HID_U,
                 HID_S,HID_B,HID_R,HID_D,
                 HID_C,HID_A,HID_B,HID_SPACEBAR};
unsigned char usb_kbd_state;
unsigned char  transmit_no_key;
typedef union 
{
 unsigned int w;
  unsigned char  b[2];
} Union16;

Union16 scan_key;
unsigned char   usb_key;
unsigned char  key_hit;
unsigned char  shift_key;
static  unsigned char   endpoint_status[2];
static  unsigned char   hid_idle_duration;
static  unsigned char   *pbuffer;
static  unsigned char   bmRequestType;
unsigned char   usb_configuration_nb;
extern  bit     usb_connected;
bit   usb_connected_stored;
bit   usb_configured_stored;
/////////////////////////////
void main (void)
{
  EA = 1;                 //使能中断
  init_timer0();         //定时器初始化
  delay(10);
  usb_task_init();       //usb控制器初始化
  while(1)               //任务循环
  {
  usb_task();           //usb任务处理子程序  
  usb_kbd_task();        //键盘任务处理
  delay(256);            //延时
  }
}

void init_timer0()
{
  TMOD=0x05;
  TH0=0;
  TL0=0;
}
void delay(int n)
{
  TH0=n;
  TL0=0;
  TR0=1;
  if(TH0>1);
  return;
}

void usb_task_init(void)
{ 
  USBCON |= 0x80; //使能USB控制器
  USBCON |= 0x10; /*USB软件插拔*/
  delay(100);
  USBCON &= ~0x10;
  PLLDIV = 32; //配置控制器时钟
  PLLCON |= 0x02;//使能PLL
  //usb_configure_endpoint(EP_CONTROL, CONTROL);//配置控制端口
  UEPNUM = 0;//复位控制端口
  UEPCONX = 0;
  /*初始化状态变量*/
  usb_connected = 0;
  usb_connected_stored = 1;
  usb_configured_stored = 0;
  transmit_no_key = 0;
  key_hit = 0;
  usb_kbd_state = 0;
  shift_key = 0;
  endpoint_status[0] = 0x00;
  endpoint_status[1] = 0x00;
  usb_connected = 0;
  usb_configuration_nb = 0x00;
}
/////////////////////////////////
void usb_task(void)
{

  if (USBINT & 0x01)    //如果处于挂起状态
  {
    if (usb_connected == 1)
    { 
      usb_connected = 0;
     }

    if (USBINT & 0x20)//当接受到唤醒指令时
    {
      usb_connected = 1;//设置连接标志
      USBINT =USBINT & ~0x01;//清除挂起标志
      USBINT =USBINT & ~0x20;//清除唤醒标志
      USBINT =USBINT & ~0x08;
      }
  }
  else         
  {
    usb_connected = 1;
    if (USBINT & 0x10) //复位中断;