示例#1
0
文件: enc28j60.c 项目: mota37/Modbus
/**
 * Receive a single packet.
 * The contents will be placed in uip_buf, and uIP is called
 * as appropriate.
 */
void enc_receive_packet(void) {
	/* Receive a single packet */
	uint8_t header[6];
	uint8_t *status = header + 2;

	WRITE_REG(ENC_ERDPTL, enc_next_packet & 0xFF);
	WRITE_REG(ENC_ERDPTH, (enc_next_packet >> 8) & 0xFF);
	enc_rbm(header, 6);

	/* Update next packet pointer */
	enc_next_packet = header[0] | (header[1] << 8);

	uint16_t data_count = status[0] | (status[1] << 8);
	if (status[2] & (1 << 7)) {
	  uip_len = data_count;
	  enc_rbm(uip_buf, data_count);

	  if( BUF->type == htons(UIP_ETHTYPE_IP) ) {
	    uip_arp_ipin();
	    uip_input();

	    if( uip_len > 0 ) {
	      uip_arp_out();
	      enc_send_packet(uip_buf, uip_len);
	      uip_len = 0;
	    }
	  } else if( BUF->type == htons(UIP_ETHTYPE_ARP) ) {
	    uip_arp_arpin();
	    if( uip_len > 0 ) {
	      //uip_arp_out();
	      enc_send_packet(uip_buf, uip_len);
	      uip_len = 0;
	    }
	  }
	}

	uint16_t erxst = READ_REG(ENC_ERXSTL) | (READ_REG(ENC_ERXSTH) << 8);

	/* Mark packet as read */
	if (enc_next_packet == erxst) {
		WRITE_REG(ENC_ERXRDPTL, READ_REG(ENC_ERXNDL));
		WRITE_REG(ENC_ERXRDPTH, READ_REG(ENC_ERXNDH));
	} else {
		WRITE_REG(ENC_ERXRDPTL, (enc_next_packet-1) & 0xFF);
		WRITE_REG(ENC_ERXRDPTH, ((enc_next_packet-1) >> 8) & 0xFF);
	}
	SET_REG_BITS(ENC_ECON2, ENC_ECON2_PKTDEC);
}
示例#2
0
文件: arp.c 项目: bkbme/avr
/**Callback for every incoming packet.
 *
 */
void arp_callback(uint8_t* data, uint16_t len)
{
	printf("arp_callback\n");
	ethernet_header* eh = (ethernet_header*)data;
	if(eh->len_field == ETHERTYPE_ARP)
	{
		arp_header* ah = (arp_header*)(data+ETH_HLEN);
		if(ah->oper == ARP_OPCODE_REPLY)
		{
			arp_add_to_table(ah);
		}
		else if(ah->oper == ARP_OPCODE_REQUEST)
		{
			arp_add_to_table(ah);
			//Send arp reply..
			eth_addr source_ether = ah->sha;
			ip_addr  source_ip;
			source_ip.data = ah->spa;
			ethernet_gen_header(&(source_ether), ETHERTYPE_ARP, eth_data);
			arp_header* ah_rep = (arp_header*)(eth_data+ETH_HLEN);
			ah_rep->hType = ARP_HTYPE_ETHERNET;
			ah_rep->pType = ETHERTYPE_IP;
			ah_rep->hlen = 6;
			ah_rep->plen = 4;
			ah_rep->oper = ARP_OPCODE_REPLY;
			SET_MAC((&(ah_rep->sha)));
			ah_rep->spa = LOCAL_IP;
			ah_rep->tpa = source_ip.data;
			ah_rep->tha = source_ether;
			enc_prepare_ethernet_packet((ethernet_header*)eth_data);
			enc_add_packet_data(eth_data+ETH_HLEN, sizeof(arp_header));
			enc_send_packet();
		}
	}
}
示例#3
0
文件: arp.c 项目: bkbme/avr
void arp_send_request(ip_addr* ip)
{
	eth_addr brdcast;
	brdcast.words[0] = HTONS(0xffff);
	brdcast.words[1] = HTONS(0xffff);
	brdcast.words[2] = HTONS(0xffff);

	buffer_t* buf = NULL;
	buffer_create(buf, ARP_PLEN);
	ethernet_gen_header(&brdcast, ETHERTYPE_ARP, buf->data);
	ethernet_header* eh = (ethernet_header*)buf->data;
	arp_request(ip, buf->data+sizeof(ethernet_header));
	enc_prepare_ethernet_packet(eh);
	enc_add_packet_data(buf->data+sizeof(ethernet_header), sizeof(arp_header));
	enc_send_packet();
}
示例#4
0
void main(void) {
  static struct uip_eth_addr eth_addr;
  uip_ipaddr_t ipaddr;

  cpu_init();
  uart_init();
  printf("Welcome\n");
  spi_init();
  enc28j60_comm_init();

  printf("Welcome\n");

  enc_init(mac_addr);

  //
  // Configure SysTick for a periodic interrupt.
  //
  MAP_SysTickPeriodSet(MAP_SysCtlClockGet() / SYSTICKHZ);
  MAP_SysTickEnable();
  MAP_SysTickIntEnable();

  //MAP_IntEnable(INT_GPIOA);
  MAP_IntEnable(INT_GPIOE);
  MAP_IntMasterEnable();

  MAP_SysCtlPeripheralClockGating(false);

  printf("int enabled\n");

  MAP_GPIOIntTypeSet(GPIO_PORTE_BASE, ENC_INT, GPIO_FALLING_EDGE);
  MAP_GPIOPinIntClear(GPIO_PORTE_BASE, ENC_INT);
  MAP_GPIOPinIntEnable(GPIO_PORTE_BASE, ENC_INT);

  uip_init();

  eth_addr.addr[0] = mac_addr[0];
  eth_addr.addr[1] = mac_addr[1];
  eth_addr.addr[2] = mac_addr[2];
  eth_addr.addr[3] = mac_addr[3];
  eth_addr.addr[4] = mac_addr[4];
  eth_addr.addr[5] = mac_addr[5];

  uip_setethaddr(eth_addr);

#define DEFAULT_IPADDR0 10
#define DEFAULT_IPADDR1 0
#define DEFAULT_IPADDR2 0
#define DEFAULT_IPADDR3 201

#define DEFAULT_NETMASK0 255
#define DEFAULT_NETMASK1 255
#define DEFAULT_NETMASK2 255
#define DEFAULT_NETMASK3 0

#undef STATIC_IP

#ifdef STATIC_IP
  uip_ipaddr(ipaddr, DEFAULT_IPADDR0, DEFAULT_IPADDR1, DEFAULT_IPADDR2,
	     DEFAULT_IPADDR3);
  uip_sethostaddr(ipaddr);
  printf("IP: %d.%d.%d.%d\n", DEFAULT_IPADDR0, DEFAULT_IPADDR1,
	     DEFAULT_IPADDR2, DEFAULT_IPADDR3);
  uip_ipaddr(ipaddr, DEFAULT_NETMASK0, DEFAULT_NETMASK1, DEFAULT_NETMASK2,
	     DEFAULT_NETMASK3);
  uip_setnetmask(ipaddr);
#else
  uip_ipaddr(ipaddr, 0, 0, 0, 0);
  uip_sethostaddr(ipaddr);
  printf("Waiting for IP address...\n");
  uip_ipaddr(ipaddr, 0, 0, 0, 0);
  uip_setnetmask(ipaddr);
#endif

  httpd_init();

#ifndef STATIC_IP
  dhcpc_init(mac_addr, 6);
  dhcpc_request();
#endif

  long lPeriodicTimer, lARPTimer;
  lPeriodicTimer = lARPTimer = 0;

  int i; // = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
  while(true) {
    //MAP_IntDisable(INT_UART0);
    MAP_SysCtlSleep();
    //MAP_IntEnable(INT_UART0);

    //i = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
    /*while(i != 0 && g_ulFlags == 0) {
      i = MAP_GPIOPinRead(GPIO_PORTA_BASE, ENC_INT) & ENC_INT;
      }*/

    if( HWREGBITW(&g_ulFlags, FLAG_ENC_INT) == 1 ) {
      HWREGBITW(&g_ulFlags, FLAG_ENC_INT) = 0;
      enc_action();
    }

    if(HWREGBITW(&g_ulFlags, FLAG_SYSTICK) == 1) {
      HWREGBITW(&g_ulFlags, FLAG_SYSTICK) = 0;
      lPeriodicTimer += SYSTICKMS;
      lARPTimer += SYSTICKMS;
      //printf("%d %d\n", lPeriodicTimer, lARPTimer);
    }

    if( lPeriodicTimer > UIP_PERIODIC_TIMER_MS ) {
      lPeriodicTimer = 0;
      int l;
      for(l = 0; l < UIP_CONNS; l++) {
	uip_periodic(l);

	//
	// If the above function invocation resulted in data that
	// should be sent out on the network, the global variable
	// uip_len is set to a value > 0.
	//
	if(uip_len > 0) {
	  uip_arp_out();
	  enc_send_packet(uip_buf, uip_len);
	  uip_len = 0;
	}
      }

      for(l = 0; l < UIP_UDP_CONNS; l++) {
	uip_udp_periodic(l);
	if( uip_len > 0) {
	  uip_arp_out();
	  enc_send_packet(uip_buf, uip_len);
	  uip_len = 0;
	}
      }
    }

    if( lARPTimer > UIP_ARP_TIMER_MS) {
      lARPTimer = 0;
      uip_arp_timer();
    }

  }

}