main.c

增强型51单片机fs7821usb读写程序

/*
**********************************************************************************************
* Project:	TK7821
* File:		main.c
* Contents: 
*           The main and interrupt handler
*
* $Date: 02/25/05    Jason    v0.1
*        04/21/05    Mingo    v0.2   www.fameg.com
*        06/24/05    Mingo    v0.3   
*
* Copyright (c) 2005 Fameg, Inc. All rights reserved
***********************************************************************************************
*/
#include <reg51.h>
#include <stdlib.h>
#include "Device.h"
#include "UsbDisk.h"

xdata UINT16 DelayTimer = 0;

//----------------------------------------------------------------------------
// Timeout every 10 ms
//----------------------------------------------------------------------------
void Timer0() interrupt 1 using 3
{
  // Restore the counter to 10 ms
  TH0 = 0xCE;
  TL0 = 0xE8;

  // Inc the system tick
  if (DelayTimer)
    DelayTimer --;
}

//----------------------------------------------------------------------------
void main()
{
  TH1 = 0xF8; // For 15MHz CPU Clock
  TH0 = 0xCE;
  TL0 = 0xE8;
  TMOD = 0x21;
  TCON = 0x50;
  IP = 0x02;
  IE = 0x82;

  CSRWrite(USB_BASE + GCTL, CSRRead(USB_BASE + GCTL) | DISCONNECT);
  Delay(300);

  CSRWrite(USB_BASE + GCTL, CSRRead(USB_BASE + GCTL) | RESET); //0xF000,General control register
  POWER_LED_CTRL = 0;

  UsbInit();

  while (true)
  {
    BYTE Event;

    Event = CSRRead(USB_BASE + EPIE); //0xF001,EP interrupt event 1 register
    if (Event)
    {
      if (Event & (IRQ_RX0 | IRQ_TX0 | IRQ_IN0))
        UsbCtrlIntHandler(Event);   

      if (Event & IRQ_RX2)
      {
        UsbBulkIntHandler(Event);
      }
    }

	if(POWER_LED_CTRL)
		POWER_LED_CTRL = FALSE;	//亮
	else
		POWER_LED_CTRL = TRUE; 

	Delay(50);

  }
}