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  1. /*********************************************
  2.  * vim:sw=8:ts=8:si:et
  3.  * To use the above modeline in vim you must have "set modeline" in your .vimrc
  4.  * Author: Guido Socher
  5.  * Copyright: GPL V2
  6.  *
  7.  * Ethernet remote device and sensor: test program 1
  8.  *
  9.  * Title: Microchip ENC28J60 Ethernet Interface Driver
  10.  * Chip type           : ATMEGA88 with ENC28J60
  11.  *********************************************/
  12. /*-----------------------------------------------------------------------------
  13.  * Includes
  14.  *---------------------------------------------------------------------------*/
  15. /* system files */
  16. #include <avr/io.h>
  17.  
  18. /* lib files */
  19. #include <ip_arp_udp_tcp.h>
  20. #include <enc28j60.h>
  21. #include <timeout.h>
  22. #include <avr_compat.h>
  23. #include <net.h>
  24.  
  25. // please modify the following two lines. mac and ip have to be unique
  26. // in your local area network. You can not have the same numbers in
  27. // two devices:
  28. static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x24};
  29. static uint8_t myip[4] = {193,11,254,22};
  30. // how did I get the mac addr? Translate the first 3 numbers into ascii is: TUX
  31.  
  32. #define BUFFER_SIZE 250
  33. static uint8_t buf[BUFFER_SIZE+1];
  34.  
  35. int main(void){
  36.  
  37.        
  38.         uint16_t plen;
  39.         uint8_t i=0;
  40.        
  41.         // set the clock speed to 8MHz
  42.         // set the clock prescaler. First write CLKPCE to enable setting of clock the
  43.         // next four instructions.
  44.         CLKPR=(1<<CLKPCE);
  45.         CLKPR=0; // 8 MHZ
  46.        
  47.         /* enable PB0, reset as output */
  48.         DDRB|= (1<<DDB0);
  49.  
  50.         /* set output to gnd, reset the ethernet chip */
  51.         PORTB &= ~(1<<PB0);
  52.         delay_ms(20);
  53.         /* set output to Vcc, reset inactive */
  54.         PORTB|= (1<<PB0);
  55.         delay_ms(100);
  56.        
  57.         // LED
  58.         /* enable PB1, LED as output */
  59.         DDRD|= (1<<DDD6);
  60.  
  61.         /* set output to Vcc, LED off */
  62.         PORTD|= (1<<PD6);
  63.  
  64.         /*initialize enc28j60*/
  65.         enc28j60Init(mymac);
  66.        
  67.     /* Magjack leds configuration, see enc28j60 datasheet, page 11 */
  68.     // LEDA=greed LEDB=yellow
  69.     //
  70.     // 0x880 is PHLCON LEDB=on, LEDA=on
  71.     // enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
  72.     enc28j60PhyWrite(PHLCON,0x880);
  73.     delay_ms(500);
  74.     //
  75.     // 0x990 is PHLCON LEDB=off, LEDA=off
  76.     // enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
  77.     enc28j60PhyWrite(PHLCON,0x990);
  78.     delay_ms(500);
  79.     //
  80.     // 0x880 is PHLCON LEDB=on, LEDA=on
  81.     // enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
  82.     enc28j60PhyWrite(PHLCON,0x880);
  83.     delay_ms(500);
  84.     //
  85.     // 0x990 is PHLCON LEDB=off, LEDA=off
  86.     // enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
  87.     enc28j60PhyWrite(PHLCON,0x990);
  88.     delay_ms(500);
  89.     //
  90.         // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit
  91.         // enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10);
  92.         enc28j60PhyWrite(PHLCON,0x476);
  93.     delay_ms(100);
  94.        
  95.         //init the ethernet/ip layer:
  96.         init_ip_arp_udp_tcp(mymac,myip,80);
  97.  
  98.         while(1){
  99.                 // get the next new packet:
  100.                 plen = enc28j60PacketReceive(BUFFER_SIZE, buf);
  101.  
  102.                 /*plen will ne unequal to zero if there is a valid
  103.                  * packet (without crc error) */
  104.                 if(plen==0){
  105.                         continue;
  106.                 }
  107.                 // arp is broadcast if unknown but a host may also
  108.                 // verify the mac address by sending it to
  109.                 // a unicast address.
  110.                 if(eth_type_is_arp_and_my_ip(buf,plen)){
  111.                         make_arp_answer_from_request(buf);
  112.                         continue;
  113.                 }
  114.                 // check if ip packets (icmp or udp) are for us:
  115.                 if(eth_type_is_ip_and_my_ip(buf,plen)==0){
  116.                         continue;
  117.                 }
  118.                
  119.                 if (i){
  120.                         /* set output to Vcc, LED off */
  121.                         PORTD|= (1<<PD6);
  122.                         i=0;
  123.                 }else{
  124.                         /* set output to GND, LED on */
  125.                         PORTD &= ~(1<<PD6);
  126.                         i=1;
  127.                 }
  128.  
  129.                        
  130.                 if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
  131.                         // a ping packet, let's send pong
  132.                         make_echo_reply_from_request(buf,plen);
  133.                         continue;
  134.                 }
  135.         }
  136.         return (0);
  137. }
  138.