main.c

ATmega103、ATmega128做的开发板web server源码

/******************************************************************
* main.c: Main Routine for AVR web server
* 
* Copyright (c) 2001 Atmel Corporation.
* All Rights Reserved.
*
* You are autorized to use, copy and distribute this software only at 
* a single site (the term "site" meaning a single company location). 
* This copyright notice must be included in any copy, modification 
* or portion of this software merged into another program.
* 
* This software is licenced solely for use with Atmel AVR micro 
* controller family. The software may not be modified to execute on 
* any other microcontroller architectures
*
* This software is provided "as is"; Without warranties either express
* or implied, including any warranty regarding merchantability, 
* fitness for a particular purpose or noninfringement. 
*
* In no event shall Atmel or its suppliers be liable for any special, 
* indirect,incidential or concequential damages resulting from the 
* use or inability to use this software.
*
* Revision history:
*
* January 17, 2001:   Version 1.0   Created by JB
* July 13, 2001		  Version 1.2     JB
* 					- Changed to IAR compiler V2.25
*					- Renamed flash file functions to avoid conflict with 
*					  standard file I/O names	
*					- Bug fixes in HTTP
*					- Speed optimization in TCP 
*
*
*******************************************************************/
#define ENABLE_BIT_DEFINITIONS
#include "comp_a90.h"
#include "main.h"
#include "ethernet.h"
#include "ffile.h"
#include "tcp.h"
#include "ftpd.h"
#include "httpd.h"
#include "config.h"
#include "udp.h"
#include "dhcp.h"
#include "smtp.h"
#include "ymodem.h"
#include "script.h"
#include <iom103.h>
#include <ina90.h>
#include <stdio.h>
#include <string.h>

extern void *__RSTACK_in_external_ram;

unsigned char dhcpEnable;

// __low_level_init is called directly from C_Startup
char __low_level_init()
{
    __require (__RSTACK_in_external_ram); 

    DDRB = 0xF7;                             // SPI Port initialisation
    PORTB |= 0x0d;                            // all outputs high, inputs have pullups (LED is off) 
    DDRE = 0x00;
    PORTE |= 0x08;	
    SPCR= 0x50;
    
    MCUCR |= 0x80;    //Enable external SRAM, without wait state
    TIMSK = 0x01;     //Enable timer interrupt
//    TCCR0 = 0x07;     
    EIMSK = 0x10;     // Enable external interrupt 4
    EIFR = 0x00;      // Clear interrupt flag.
    EICR = 0x03;     	 // Program interrupt on positiv edge
    return 1;    
}

void main (void)
{
  if(!(PINE & 0x08))	// if PortE pin 3 is pulled low during power-up - Format dataflash, debug only
  {
  	fformat();
  }
  ffinit();
  initYmodem(); // low level Ymodem hardware initialization         

  if(!config())
  {
    defaultConfig();
  }

  initEthernet();
  TCPinit();
  _SEI();
  
  
  if(dhcpEnable)
  {
    DHCP();
  }
  httpdInit();
  
  PORTB |= 0xf0;    //Enable LED1-4
                   //Enable interrupts
  TCCR0 = 0x07;     
  for (;;)
  {
    if(dhcpEnable)
    {
      DHCP();
    }
    httpd();        // Listen for http requests.
    ftpd();			// Check FTP requests	
  }
}

/*
  To send segments with application data, the timer
  interrupt is used. Everytime a timer overflow occurs,
  the microcontroller checks for unsent data.
*/
#pragma vector = TIMER0_OVF_vect
__interrupt  void TIMER0_OVF_interrupt (void)
{
	checkDHCP();
  	checkTCP();
  	checkYmodem(); 
  	TCNT0 = 0x00;
}

/*
  When an interrupt request is received from the
  ethernet controller, the Interrupt Status Queue
  is read and receiveEvent is called if a frame is
  received.
*/
#pragma vector = INT4_vect
__interrupt void INT4_interrupt (void)
{
    int i;

    while (i = *ISQ)
    {
        if ( (i & 0x04) != 0 )  //If this is a valid receive event..
        {
          receiveEvent();
        }      
    }                   // Read untill interrupt status queue is zero
                      // to reactivate interrupt from ethernet controller
                    
}