ethersex.c

/*
 * Copyright (c) by Alexander Neumann <alexander@bumpern.de>
 * Copyright (c) 2007 by Stefan Siegl <stesie@brokenpipe.de>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (either version 2 or
 * version 3) as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * For more information on the GPL, please go to:
 * http://www.gnu.org/copyleft/gpl.html
 */

#include "config.h"

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <util/delay.h>
#include <stdlib.h>

#include "protocols/uip/uip.h"
#include "protocols/uip/uip_neighbor.h"

#include "core/global.h"
#include "core/debug.h"
#include "core/spi.h"
#include "network.h"
#include "core/portio/portio.h"
#include "hardware/radio/rfm12/rfm12.h"
#include "protocols/uip/ipv6.h"
#include "hardware/storage/sd_reader/sd_raw.h"
#include "core/vfs/vfs.h"

#include "autoconf.h"

/* global configuration */
global_status_t status;

/* prototypes */
void (*jump_to_bootloader) (void) = (void *) BOOTLOADER_START_ADDRESS;

#ifdef DEBUG_RESET_REASON
uint8_t mcusr_mirror __attribute__ ((section (".noinit")));
#endif

void __start (void) __attribute__ ((naked))
                    __attribute__ ((used))
                    __attribute__ ((section (".init1")));
void __start ()
{
  /* Clear the watchdog register to avoid endless wdreset loops */
#ifdef DEBUG_RESET_REASON
  mcusr_mirror = MCU_STATUS_REGISTER;
#endif
  MCU_STATUS_REGISTER = 0;
  wdt_disable ();
  /* Disable all timer interrupts */
#ifdef TIMSK
  TIMSK = 0;
#endif
#ifdef TIMSK0
  TIMSK0 = 0;
#endif
#ifdef TIMSK1
  TIMSK1 = 0;
#endif
#ifdef TIMSK2
  TIMSK2 = 0;
#endif
}

extern void ethersex_meta_init (void);
extern void ethersex_meta_startup (void);
extern void ethersex_meta_mainloop (void);

int
main (void)
{
#ifdef BOOTLOADER_SUPPORT
  _IVREG = _BV (IVCE);		/* prepare ivec change */
  _IVREG = _BV (IVSEL);		/* change ivec to bootloader */
#endif

  /* Default DDR Config */
#if IO_HARD_PORTS == 4 && DDR_MASK_A != 0
  DDRA = DDR_MASK_A;
#endif
#if DDR_MASK_B != 0
  DDRB = DDR_MASK_B;
#endif
#if DDR_MASK_C != 0
  DDRC = DDR_MASK_C;
#endif
#if DDR_MASK_D != 0
  DDRD = DDR_MASK_D;
#endif
#if IO_HARD_PORTS == 6
#if DDR_MASK_E != 0
  DDRE = DDR_MASK_E;
#endif
#if DDR_MASK_F != 0
  DDRF = DDR_MASK_F;
#endif
#endif

#ifdef STATUSLED_POWER_SUPPORT
  PIN_SET (STATUSLED_POWER);
#endif

  //FIXME: zum ethersex meta system hinzufügen, aber vor allem anderem initalisieren
  debug_init ();
  debug_printf ("Ethersex " VERSION_STRING " (Debug mode)\n");

#ifdef DEBUG_RESET_REASON
  if (bit_is_set (mcusr_mirror, BORF))
    debug_printf ("reset: Brown-out\n");
  else if (bit_is_set (mcusr_mirror, PORF))
    debug_printf ("reset: Power on\n");
  else if (bit_is_set (mcusr_mirror, WDRF))
    debug_printf ("reset: Watchdog\n");
  else if (bit_is_set (mcusr_mirror, EXTRF))
    debug_printf ("reset: Extern\n");
  else
    debug_printf ("reset: Unknown\n");
#endif

#ifdef BOOTLOADER_SUPPORT
  /* disable interrupts */
  cli ();
  wdt_disable();
#endif //BOOTLOADER_SUPPORT
  /* enable interrupts */
  sei ();

#ifdef USE_WATCHDOG
  debug_printf ("enabling watchdog\n");
#ifdef DEBUG
  /* for debugging, test reset cause and jump to bootloader */
  if (MCU_STATUS_REGISTER & _BV (WDRF))
    {
      debug_printf ("bootloader...\n");
      jump_to_bootloader ();
    }
#endif
  /* set watchdog to 2 seconds */
  wdt_enable (WDTO_2S);
  wdt_kick ();
#else //USE_WATCHDOG
  debug_printf ("disabling watchdog\n");
  wdt_disable ();
#endif //USE_WATCHDOG

#if defined(ADC_SUPPORT) || defined(ADC_LIGHT)
  /* ADC Prescaler to 64 */
  ADCSRA = _BV (ADEN) | _BV (ADPS2) | _BV (ADPS1);
  /* ADC set Voltage Reference to extern */
  /* FIXME: move config to the right place */
  ADMUX = ADC_REF;		//_BV(REFS0) | _BV(REFS1);
#endif

#if defined(RFM12_SUPPORT) || defined(ENC28J60_SUPPORT) \
	|| defined(DATAFLASH_SUPPORT)
  spi_init ();
#endif

  ethersex_meta_init ();

  /* must be called AFTER all other initialization */
#ifdef PORTIO_SUPPORT
  portio_init ();
#elif defined(NAMED_PIN_SUPPORT)
  np_simple_init ();
#endif

#ifdef ENC28J60_SUPPORT
  debug_printf ("enc28j60 revision 0x%x\n",
		read_control_register (REG_EREVID));
  debug_printf ("mac: %x:%x:%x:%x:%x:%x\n", uip_ethaddr.addr[0],
		uip_ethaddr.addr[1], uip_ethaddr.addr[2], uip_ethaddr.addr[3],
		uip_ethaddr.addr[4], uip_ethaddr.addr[5]);
#endif

#ifdef STATUSLED_BOOTED_SUPPORT
  PIN_SET (STATUSLED_BOOTED);
#endif

  ethersex_meta_startup ();

  /* main loop */
  while (1)
    {

      wdt_kick ();
      ethersex_meta_mainloop ();

#ifdef SD_READER_SUPPORT
      if (sd_active_partition == NULL)
	{
	  if (!sd_try_init ())
	    vfs_sd_try_open_rootnode ();

	  wdt_kick ();
	}
#endif

#ifdef BOOTLOADER_JUMP
      if (status.request_bootloader)
	{
#ifdef CLOCK_CRYSTAL_SUPPORT
	  _TIMSK_TIMER2 &= ~_BV (TOIE2);
#endif
#ifdef DCF77_SUPPORT
	  ACSR &= ~_BV (ACIE);
#endif
	  cli ();
	  jump_to_bootloader ();
	}
#endif

#ifndef TEENSY_SUPPORT
      if (status.request_wdreset)
	{
	  cli ();
	  wdt_enable (WDTO_15MS);
	  for (;;);
	}
#endif

      if (status.request_reset)
	{
	  cli ();
	  void (*reset) (void) = NULL;
	  reset ();
	}
    }
}