/*
 * Copyright (c) 2006, Technical University of Munich
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the Contiki operating system.
 *
 */
#define PRINTF(FORMAT,args...) printf_P(PSTR(FORMAT),##args)

#define ANNOUNCE_BOOT 1    //adds about 600 bytes to program size
#if ANNOUNCE_BOOT
#define PRINTA(FORMAT,args...) printf_P(PSTR(FORMAT),##args)
#else
#define PRINTA(...)
#endif

#define DEBUG 0
#if DEBUG
#define PRINTD(FORMAT,args...) printf_P(PSTR(FORMAT),##args)
#else
#define PRINTD(...)
#endif

#include <avr/pgmspace.h>
#include <avr/fuse.h>
#include <avr/eeprom.h>
#include <stdio.h>
#include <string.h>
#include <dev/watchdog.h>

#include "loader/symbols-def.h"
#include "loader/symtab.h"

#include "params.h"
#include "radio/rf230bb/rf230bb.h"
#include "net/mac/frame802154.h"
#include "net/mac/framer-802154.h"
#include "net/ipv6/sicslowpan.h"

#include "contiki.h"
#include "contiki-net.h"
#include "contiki-lib.h"

#include "dev/rs232.h"
#include "dev/serial-line.h"
#include "dev/slip.h"

#if AVR_WEBSERVER
#include "httpd-fs.h"
#include "httpd-cgi.h"
#endif

#ifdef COFFEE_FILES
#include "cfs/cfs.h"
#include "cfs/cfs-coffee.h"
#endif

#if UIP_CONF_ROUTER&&0
#include "net/routing/rimeroute.h"
#include "net/rime/rime-udp.h"
#endif

#include "net/rime/rime.h"

/* Track interrupt flow through mac, rdc and radio driver */
//#define DEBUGFLOWSIZE 32
#if DEBUGFLOWSIZE
uint8_t debugflowsize,debugflow[DEBUGFLOWSIZE];
#define DEBUGFLOW(c) if (debugflowsize<(DEBUGFLOWSIZE-1)) debugflow[debugflowsize++]=c
#else
#define DEBUGFLOW(c)
#endif

/* Get periodic prints from idle loop, from clock seconds or rtimer interrupts */
/* Use of rtimer will conflict with other rtimer interrupts such as contikimac radio cycling */
/* STAMPS will print ENERGEST outputs if that is enabled. */
#define PERIODICPRINTS 1
#if PERIODICPRINTS
//#define PINGS 64
#define ROUTES 600
#define STAMPS 60
#define STACKMONITOR 1024
uint32_t clocktime;
#define TESTRTIMER 0
#if TESTRTIMER
uint8_t rtimerflag=1;
struct rtimer rt;
void rtimercycle(void) {rtimerflag=1;}
#endif
#endif

//uint16_t ledtimer;

/*-------------------------------------------------------------------------*/
/*----------------------Configuration of the .elf file---------------------*/
#if 1
/* The proper way to set the signature is */
#include <avr/signature.h>
#else
/* Older avr-gcc's may not define the needed SIGNATURE bytes. Do it manually if you get an error */
typedef struct {const unsigned char B2;const unsigned char B1;const unsigned char B0;} __signature_t;
#define SIGNATURE __signature_t __signature __attribute__((section (".signature")))
SIGNATURE = {
  .B2 = 0x01,//SIGNATURE_2, //ATMEGA128rfa1
  .B1 = 0xA7,//SIGNATURE_1, //128KB flash
  .B0 = 0x1E,//SIGNATURE_0, //Atmel
};
#endif

#if 1
/* JTAG+SPI enabled, External osc 1kck4ms1 , Boot 4096 words @ $1F000, TXC1K+4,1msec delay, Brownout 1.9 volts */
FUSES ={.low = 0xF6, .high = 0x98, .extended = 0xfd,};
#define BOOTLOADER_START = 0x1F000
#else
/* JTAG+SPI, Boot 4096 words @ $F000, Internal  oscillator, startup 6 CK +0 ms, Brownout 1.8 volts */
FUSES ={.low = 0xC2, .high = 0x99, .extended = 0xfe,};
#endif

#include "lib/sensors.h"
#include "dev/button-sensor.h"
#include "dev/battery-sensor.h"
#include "dev/pir-sensor.h"
SENSORS(&button_sensor, &pir_sensor);

uint8_t
rng_get_uint8(void) {
#if 1
  /* Upper two RSSI reg bits (RND_VALUE) are random in rf231 */
  uint8_t j;
  j = (PHY_RSSI&0xc0) + ((PHY_RSSI>>2)&0x30) + ((PHY_RSSI>>4)&0x0c) + ((PHY_RSSI>>6)&0x03);
#else
/* Get a pseudo random number using the ADC */
  uint8_t i,j;
  ADCSRA=1<<ADEN;             //Enable ADC, not free running, interrupt disabled, fastest clock
  for (i=0;i<4;i++) {
    ADMUX = 0;                //toggle reference to increase noise
    ADMUX =0x1E;              //Select AREF as reference, measure 1.1 volt bandgap reference.
    ADCSRA|=1<<ADSC;          //Start conversion
    while (ADCSRA&(1<<ADSC)); //Wait till done
	j = (j<<2) + ADC;
  }
  ADCSRA=0;                   //Disable ADC
#endif
  PRINTD("rng issues %d\n",j);
  return j;
}

void
clock_delay(unsigned int howlong)
{
  if(howlong<2) return;
  clock_delay_usec((45*howlong)>>4);
}
/*-------------------------Low level initialization------------------------*/
/*------Done in a subroutine to keep main routine stack usage small--------*/
void initialize(void)
{
  watchdog_init();
  watchdog_start();

  /* Generic or slip connection on uart0 */
  rs232_init(RS232_PORT_0, USART_BAUD_38400,USART_PARITY_NONE | USART_STOP_BITS_1 | USART_DATA_BITS_8);

  /* Second rs232 port for debugging or slip alternative */
//  rs232_init(RS232_PORT_1, USART_BAUD_57600,USART_PARITY_NONE | USART_STOP_BITS_1 | USART_DATA_BITS_8);

  /* Redirect stdout */
  rs232_redirect_stdout(RS232_PORT_0);
#if 0
  /* Do it my way... */
  //UBRR0L =  8; UBRR0H = 0; UCSR0A = (0 << U2X0);  // 115.2k  err=-3.5%  
  //UBRR0L = 16; UBRR0H = 0; UCSR0A = (1 << U2X0);  // 115.2k     2.1%  
  //UBRR0L =  3; UBRR0H = 0; UCSR0A = (1 << U2X0);  // 500k         0%
#endif

  rs232_set_input(RS232_PORT_0, serial_line_input_byte);
  clock_init();

  if(MCUSR & (1<<PORF )) PRINTD("Power-on reset.\n");
  if(MCUSR & (1<<EXTRF)) PRINTD("External reset!\n");
  if(MCUSR & (1<<BORF )) PRINTD("Brownout reset!\n");
  if(MCUSR & (1<<WDRF )) PRINTD("Watchdog reset!\n");
  if(MCUSR & (1<<JTRF )) PRINTD("JTAG reset!\n");

#if STACKMONITOR
  /* Simple stack pointer highwater monitor. Checks for magic numbers in the main
   * loop. In conjuction with PERIODICPRINTS, never-used stack will be printed
   * every STACKMONITOR seconds.
   */
{
extern uint16_t __bss_end;
uint16_t p=(uint16_t)&__bss_end;
    do {
      *(uint16_t *)p = 0x4242;
      p+=10;
    } while (p<SP-10); //don't overwrite our own stack
}
#endif

#define CONF_CALIBRATE_OSCCAL 0
#if CONF_CALIBRATE_OSCCAL
void calibrate_rc_osc_32k();
{
extern uint8_t osccal_calibrated;
uint8_t i;
  PRINTD("\nBefore calibration OSCCAL=%x\n",OSCCAL);
  for (i=0;i<10;i++) { 
    calibrate_rc_osc_32k();  
    PRINTD("Calibrated=%x\n",osccal_calibrated);
//#include <util/delay_basic.h>
//#define delay_us( us )   ( _delay_loop_2(1+(us*F_CPU)/4000000UL) ) 
//   delay_us(50000);
 }
   clock_init();
}
#endif 

  PRINTA("\n*******Booting %s*******\n",CONTIKI_VERSION_STRING);

/* rtimers needed for radio cycling */
  rtimer_init();

 /* Initialize process subsystem */
  process_init();

  /* etimers must be started before ctimer_init */
  process_start(&etimer_process, NULL);
  ctimer_init();

  /* Start radio and radio receive process */
  NETSTACK_RADIO.init();

/* Get a random seed for the 802.15.4 packet sequence number.
 * Some layers will ignore duplicates found in a history (e.g. Contikimac)
 * causing the initial packets to be ignored after a short-cycle restart.
 */
  random_init(rng_get_uint8());

  /* Set addresses BEFORE starting tcpip process */

	linkaddr_t addr;

  if (params_get_eui64(addr.u8)) {
      PRINTA("Random EUI64 address generated\n");
  }
 
#if NETSTACK_CONF_WITH_IPV6 
  memcpy(&uip_lladdr.addr, &addr.u8, sizeof(linkaddr_t));
#elif WITH_NODE_ID
  node_id=get_panaddr_from_eeprom();
  addr.u8[1]=node_id&0xff;
  addr.u8[0]=(node_id&0xff00)>>8;
  PRINTA("Node ID from eeprom: %X\n",node_id);
#endif  
  linkaddr_set_node_addr(&addr); 

  PRINTA("Panid:%x\n", params_get_panid());
//  framer_802154_set_panid(params_get_panid());
  rf230_set_pan_addr(params_get_panid(),params_get_panaddr(),(uint8_t *)&addr.u8);
  rf230_set_channel(params_get_channel());
  rf230_set_txpower(params_get_txpower());
//  rf230_set_cca_threshold(params_get_txpower());

#if NETSTACK_CONF_WITH_IPV6
  PRINTA("EUI-64 MAC: %x-%x-%x-%x-%x-%x-%x-%x\n",addr.u8[0],addr.u8[1],addr.u8[2],addr.u8[3],addr.u8[4],addr.u8[5],addr.u8[6],addr.u8[7]);
#else
  PRINTA("MAC address ");
  uint8_t i;
  for (i=sizeof(linkaddr_t); i>0; i--){
    PRINTA("%x:",addr.u8[i-1]);
  }
  PRINTA("\n");
#endif

  /* Initialize stack protocols */
  queuebuf_init();
  NETSTACK_RDC.init();
  NETSTACK_MAC.init();
  NETSTACK_NETWORK.init();

#if ANNOUNCE_BOOT
  PRINTA("%s %s, channel %u , check rate %u Hz tx power %u\n",NETSTACK_MAC.name, NETSTACK_RDC.name, rf230_get_channel(),
    CLOCK_SECOND / (NETSTACK_RDC.channel_check_interval() == 0 ? 1:NETSTACK_RDC.channel_check_interval()),
    rf230_get_txpower());	  
#if UIP_CONF_IPV6_RPL
  PRINTA("RPL Enabled\n");
#endif
#if UIP_CONF_ROUTER
  PRINTA("Routing Enabled\n");
#endif

#endif /* ANNOUNCE_BOOT */

#if NETSTACK_CONF_WITH_IPV6 || NETSTACK_CONF_WITH_IPV4
  process_start(&tcpip_process, NULL);
#endif

  process_start(&sensors_process, NULL);
  serial_line_init();
  /* Autostart other processes */
  autostart_start(autostart_processes);

  /*---If using coffee file system create initial web content if necessary---*/
#if COFFEE_FILES
  int fa = cfs_open( "/index.html", CFS_READ);
  if (fa<0) {     //Make some default web content
    PRINTA("No index.html file found, creating upload.html!\n");
    PRINTA("Formatting FLASH file system for coffee...");
    cfs_coffee_format();
    PRINTA("Done!\n");
    fa = cfs_open( "/index.html", CFS_WRITE);
    int r = cfs_write(fa, &"It works!", 9);
    if (r<0) PRINTA("Can''t create /index.html!\n");
    cfs_close(fa);
//  fa = cfs_open("upload.html"), CFW_WRITE);
// <html><body><form action="upload.html" enctype="multipart/form-data" method="post"><input name="userfile" type="file" size="50" /><input value="Upload" type="submit" /></form></body></html>
  }
#endif /* COFFEE_FILES */

/* Add addresses for testing */
#if 0
{  
  uip_ip6addr_t ipaddr;
  uip_ip6addr(&ipaddr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
  uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
//  uip_ds6_prefix_add(&ipaddr,64,0);
}
#endif

/*--------------------------Announce the configuration---------------------*/
#if ANNOUNCE_BOOT
#if AVR_WEBSERVER
{ uint8_t i;
  char buf[80];
  unsigned int size;

  for (i=0;i<UIP_DS6_ADDR_NB;i++) {
	if (uip_ds6_if.addr_list[i].isused) {	  
	   httpd_cgi_sprint_ip6(uip_ds6_if.addr_list[i].ipaddr,buf);
       PRINTA("IPv6 Address: %s\n",buf);
	}
  }
   cli();
   eeprom_read_block (buf,eemem_server_name, sizeof(eemem_server_name));
   sei();
   buf[sizeof(eemem_server_name)]=0;
   PRINTA("%s",buf);
   cli();
   eeprom_read_block (buf,eemem_domain_name, sizeof(eemem_domain_name));
   sei();
   buf[sizeof(eemem_domain_name)]=0;
   size=httpd_fs_get_size();
#ifndef COFFEE_FILES
   PRINTA(".%s online with fixed %u byte web content\n",buf,size);
#elif COFFEE_FILES==1
   PRINTA(".%s online with static %u byte EEPROM file system\n",buf,size);
#elif COFFEE_FILES==2
   PRINTA(".%s online with dynamic %u KB EEPROM file system\n",buf,size>>10);
#elif COFFEE_FILES==3
   PRINTA(".%s online with static %u byte program memory file system\n",buf,size);
#elif COFFEE_FILES==4
   PRINTA(".%s online with dynamic %u KB program memory file system\n",buf,size>>10);
#endif /* COFFEE_FILES */
}
#else
   PRINTA("Online\n");
#endif
#endif /* ANNOUNCE_BOOT */

}

#if ROUTES && NETSTACK_CONF_WITH_IPV6
static void
ipaddr_add(const uip_ipaddr_t *addr)
{
  uint16_t a;
  int8_t i, f;
  for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
    a = (addr->u8[i] << 8) + addr->u8[i + 1];
    if(a == 0 && f >= 0) {
      if(f++ == 0) PRINTF("::");
    } else {
      if(f > 0) {
        f = -1;
      } else if(i > 0) {
        PRINTF(":");
      }
      PRINTF("%x",a);
    }
  }
}
#endif

/*-------------------------------------------------------------------------*/
/*------------------------- Main Scheduler loop----------------------------*/
/*-------------------------------------------------------------------------*/
int
main(void)
{
#if NETSTACK_CONF_WITH_IPV6
  uip_ds6_nbr_t *nbr;
#endif /* NETSTACK_CONF_WITH_IPV6 */	
  initialize();

  while(1) {
    process_run();
    watchdog_periodic();

#if 0
    /* Turn off LED after a while */
    if (ledtimer) {
      if (--ledtimer==0) {
      }
    }
#endif

#if 0
/* Various entry points for debugging in the AVR Studio simulator.
 * Set as next statement and step into the routine.
 */
    NETSTACK_RADIO.send(packetbuf_hdrptr(), 42);
    process_poll(&rf230_process);
    packetbuf_clear();
    len = rf230_read(packetbuf_dataptr(), PACKETBUF_SIZE);
    packetbuf_set_datalen(42);
    NETSTACK_RDC.input();
#endif

#if 0
/* Clock.c can trigger a periodic PLL calibration in the RF230BB driver.
 * This can show when that happens.
 */
    extern uint8_t rf230_calibrated;
    if (rf230_calibrated) {
      PRINTD("\nRF230 calibrated!\n");
      rf230_calibrated=0;
    }
#endif

/* Set DEBUGFLOWSIZE in contiki-conf.h to track path through MAC, RDC, and RADIO */
#if DEBUGFLOWSIZE
  if (debugflowsize) {
    debugflow[debugflowsize]=0;
    PRINTF("%s",debugflow);
    debugflowsize=0;
   }
#endif

#if PERIODICPRINTS
#if TESTRTIMER
/* Timeout can be increased up to 8 seconds maximum.
 * A one second cycle is convenient for triggering the various debug printouts.
 * The triggers are staggered to avoid printing everything at once.
 */
    if (rtimerflag) {
      rtimer_set(&rt, RTIMER_NOW()+ RTIMER_ARCH_SECOND*1UL, 1,(void *) rtimercycle, NULL);
      rtimerflag=0;
#else
  if (clocktime!=clock_seconds()) {
     clocktime=clock_seconds();
#endif

#if STAMPS
if ((clocktime%STAMPS)==0) {
#if ENERGEST_CONF_ON
#include "lib/print-stats.h"
	print_stats();
#elif RADIOSTATS
extern volatile unsigned long radioontime;
  PRINTF("%u(%u)s\n",clocktime,radioontime);
#else
  PRINTF("%us\n",clocktime);
#endif

}
#endif
#if TESTRTIMER
      clocktime+=1;
#endif

#if PINGS && NETSTACK_CONF_WITH_IPV6
extern void raven_ping6(void); 
if ((clocktime%PINGS)==1) {
  PRINTF("**Ping\n");
  raven_ping6();
}
#endif

#if ROUTES && NETSTACK_CONF_WITH_IPV6
if ((clocktime%ROUTES)==2) {
      
extern uip_ds6_netif_t uip_ds6_if;

  uint8_t i,j=0;
  PRINTF("\nAddresses [%u max]\n",UIP_DS6_ADDR_NB);
  for (i=0;i<UIP_DS6_ADDR_NB;i++) {
    if (uip_ds6_if.addr_list[i].isused) {
      ipaddr_add(&uip_ds6_if.addr_list[i].ipaddr);
      PRINTF("\n");
    }
  }

  PRINTF("\nNeighbors [%u max]\n",NBR_TABLE_MAX_NEIGHBORS);

  for(nbr = nbr_table_head(ds6_neighbors);
      nbr != NULL;
      nbr = nbr_table_next(ds6_neighbors, nbr)) {
    ipaddr_add(&nbr->ipaddr);
    PRINTF("\n");
    j=0;
  }

  if (j) PRINTF("  <none>");
  PRINTF("\nRoutes [%u max]\n",UIP_DS6_ROUTE_NB);
  {
    uip_ds6_route_t *r;
    j = 1;
    for(r = uip_ds6_route_head();
        r != NULL;
        r = uip_ds6_route_next(r)) {
      ipaddr_add(&r->ipaddr);
      PRINTF("/%u (via ", r->length);
      ipaddr_add(uip_ds6_route_nexthop(r));
      PRINTF(") %lus\n", r->state.lifetime);
      j = 0;
    }
  }
  if (j) PRINTF("  <none>");
  PRINTF("\n---------\n");

}
#endif

#if STACKMONITOR
if ((clocktime%STACKMONITOR)==3) {
  extern uint16_t __bss_end;
  uint16_t p=(uint16_t)&__bss_end;
  do {
    if (*(uint16_t *)p != 0x4242) {
      PRINTF("Never-used stack > %d bytes\n",p-(uint16_t)&__bss_end);
      break;
    }
    p+=10;
  } while (p<RAMEND-10);
}
#endif

    }
#endif /* PERIODICPRINTS */

#if RF230BB&&0
extern uint8_t rf230processflag;
    if (rf230processflag) {
      PRINTF("rf230p%d",rf230processflag);
      rf230processflag=0;
    }
#endif

#if RF230BB&&0
extern uint8_t rf230_interrupt_flag;
    if (rf230_interrupt_flag) {
 //   if (rf230_interrupt_flag!=11) {
        PRINTF("**RI%u",rf230_interrupt_flag);
 //   }
      rf230_interrupt_flag=0;
    }
#endif
  }
  return 0;
}

/*---------------------------------------------------------------------------*/

void log_message(char *m1, char *m2)
{
  PRINTF("%s%s\n", m1, m2);
}