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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 205 | arune | 1 | /********************************************* |
| 2 | * vim:sw=8:ts=8:si:et |
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| 3 | * To use the above modeline in vim you must have "set modeline" in your .vimrc |
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| 4 | * Author: Guido Socher |
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| 5 | * Copyright: GPL V2 |
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| 6 | * |
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| 7 | * Ethernet remote device and sensor |
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| 8 | * |
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| 9 | * Title: Microchip ENC28J60 Ethernet Interface Driver |
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| 10 | * Chip type : ATMEGA88 with ENC28J60 |
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| 11 | *********************************************/ |
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| 12 | /*----------------------------------------------------------------------------- |
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| 13 | * Includes |
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| 14 | *---------------------------------------------------------------------------*/ |
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| 15 | /* system files */ |
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| 16 | #include <avr/io.h> |
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| 17 | #include <stdlib.h> |
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| 18 | #include <string.h> |
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| 19 | |||
| 20 | /* lib files */ |
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| 21 | #include <ip_arp_udp_tcp.h> |
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| 22 | #include <enc28j60.h> |
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| 23 | #include <timeout.h> |
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| 24 | #include <avr_compat.h> |
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| 25 | #include <net.h> |
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| 26 | |||
| 27 | |||
| 28 | // please modify the following two lines. mac and ip have to be unique |
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| 29 | // in your local area network. You can not have the same numbers in |
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| 30 | // two devices: |
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| 31 | static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x25}; |
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| 32 | static uint8_t myip[4] = {193,11,254,22}; |
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| 33 | static uint16_t myport =1200; // listen port for udp |
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| 34 | // how did I get the mac addr? Translate the first 3 numbers into ascii is: TUX |
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| 35 | |||
| 36 | #define BUFFER_SIZE 550 |
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| 37 | static uint8_t buf[BUFFER_SIZE+1]; |
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| 38 | |||
| 39 | // prepare the webpage by writing the data to the tcp send buffer |
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| 40 | uint16_t print_webpage(uint8_t *buf,uint8_t rev) |
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| 41 | { |
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| 42 | char vstr[5]; |
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| 43 | uint16_t plen; |
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| 44 | plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n")); |
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| 45 | plen=fill_tcp_data_p(buf,plen,PSTR("<center><p>ENC28J60 silicon rev is: ")); |
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| 46 | itoa((enc28j60getrev()),vstr,10); |
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| 47 | plen=fill_tcp_data(buf,plen,vstr); |
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| 48 | plen=fill_tcp_data_p(buf,plen,PSTR("</center><hr><br>ver 2.2, tuxgraphics.org\n")); |
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| 49 | return(plen); |
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| 50 | } |
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| 51 | |||
| 52 | int main(void){ |
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| 53 | |||
| 54 | |||
| 55 | uint16_t plen; |
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| 56 | uint16_t dat_p; |
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| 57 | uint8_t i=0; |
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| 58 | uint8_t payloadlen=0; |
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| 59 | char str[20]; |
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| 60 | |||
| 61 | // set the clock speed to 8MHz |
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| 62 | // set the clock prescaler. First write CLKPCE to enable setting of clock the |
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| 63 | // next four instructions. |
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| 64 | CLKPR=(1<<CLKPCE); |
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| 65 | CLKPR=0; // 8 MHZ |
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| 66 | |||
| 67 | /* enable PB0, reset as output */ |
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| 68 | DDRB|= (1<<DDB0); |
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| 69 | |||
| 70 | /* set output to gnd, reset the ethernet chip */ |
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| 71 | PORTB &= ~(1<<PB0); |
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| 72 | delay_ms(30); |
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| 73 | /* set output to Vcc, reset inactive */ |
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| 74 | PORTB|= (1<<PB0); |
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| 75 | delay_ms(200); |
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| 76 | |||
| 77 | /*initialize enc28j60*/ |
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| 78 | enc28j60Init(mymac); |
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| 79 | delay_ms(20); |
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| 80 | |||
| 81 | // LED |
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| 82 | /* enable PB1, LED as output */ |
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| 83 | DDRD|= (1<<DDD6); |
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| 84 | |||
| 85 | /* set output to Vcc, LED off */ |
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| 86 | PORTD|= (1<<PD6); |
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| 87 | |||
| 88 | /* Magjack leds configuration, see enc28j60 datasheet, page 11 */ |
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| 89 | // LEDB=yellow LEDA=green |
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| 90 | // |
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| 91 | // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit |
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| 92 | // enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10); |
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| 93 | enc28j60PhyWrite(PHLCON,0x476); |
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| 94 | delay_ms(20); |
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| 95 | |||
| 96 | /* set output to GND, red LED on */ |
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| 97 | PORTD &= ~(1<<PD6); |
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| 98 | i=1; |
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| 99 | |||
| 100 | //init the ethernet/ip layer: |
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| 101 | init_ip_arp_udp_tcp(mymac,myip,80); |
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| 102 | |||
| 103 | while(1){ |
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| 104 | // get the next new packet: |
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| 105 | plen = enc28j60PacketReceive(BUFFER_SIZE, buf); |
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| 106 | |||
| 107 | /*plen will ne unequal to zero if there is a valid |
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| 108 | * packet (without crc error) */ |
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| 109 | if(plen==0){ |
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| 110 | continue; |
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| 111 | } |
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| 112 | // arp is broadcast if unknown but a host may also |
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| 113 | // verify the mac address by sending it to |
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| 114 | // a unicast address. |
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| 115 | if(eth_type_is_arp_and_my_ip(buf,plen)){ |
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| 116 | make_arp_answer_from_request(buf); |
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| 117 | continue; |
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| 118 | } |
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| 119 | // check if ip packets (icmp or udp) are for us: |
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| 120 | if(eth_type_is_ip_and_my_ip(buf,plen)==0){ |
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| 121 | continue; |
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| 122 | } |
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| 123 | |||
| 124 | if (i){ |
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| 125 | /* set output to Vcc, LED off */ |
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| 126 | PORTD|= (1<<PD6); |
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| 127 | i=0; |
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| 128 | }else{ |
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| 129 | /* set output to GND, LED on */ |
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| 130 | PORTD &= ~(1<<PD6); |
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| 131 | i=1; |
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| 132 | } |
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| 133 | |||
| 134 | if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){ |
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| 135 | // a ping packet, let's send pong |
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| 136 | make_echo_reply_from_request(buf,plen); |
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| 137 | continue; |
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| 138 | } |
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| 139 | |||
| 140 | // tcp port 80 start |
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| 141 | if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==80){ |
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| 142 | if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){ |
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| 143 | make_tcp_synack_from_syn(buf); |
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| 144 | // make_tcp_synack_from_syn does already send the syn,ack |
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| 145 | continue; |
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| 146 | } |
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| 147 | if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){ |
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| 148 | init_len_info(buf); // init some data structures |
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| 149 | // we can possibly have no data, just ack: |
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| 150 | dat_p=get_tcp_data_pointer(); |
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| 151 | if (dat_p==0){ |
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| 152 | if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){ |
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| 153 | // finack, answer with ack |
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| 154 | make_tcp_ack_from_any(buf); |
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| 155 | } |
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| 156 | // just an ack with no data, wait for next packet |
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| 157 | continue; |
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| 158 | } |
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| 159 | if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){ |
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| 160 | // head, post and other methods: |
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| 161 | // |
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| 162 | // for possible status codes see: |
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| 163 | // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html |
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| 164 | plen=fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n<h1>200 OK</h1>")); |
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| 165 | goto SENDTCP; |
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| 166 | } |
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| 167 | // any GET, any url: |
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| 168 | plen=print_webpage(buf,enc28j60getrev()); |
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| 169 | SENDTCP: |
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| 170 | make_tcp_ack_from_any(buf); // send ack for http get |
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| 171 | make_tcp_ack_with_data(buf,plen); // send data |
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| 172 | continue; |
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| 173 | } |
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| 174 | } |
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| 175 | // tcp port 80 end |
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| 176 | // |
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| 177 | // udp start, we listen on udp port 1200=0x4B0 |
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| 178 | if (buf[IP_PROTO_P]==IP_PROTO_UDP_V&&buf[UDP_DST_PORT_H_P]==4&&buf[UDP_DST_PORT_L_P]==0xb0){ |
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| 179 | payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN; |
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| 180 | // you must sent a string starting with v |
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| 181 | // e.g udpcom version 10.0.0.24 |
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| 182 | if (buf[UDP_DATA_P]=='v' ){ |
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| 183 | str[0]='v'; |
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| 184 | str[1]='e'; |
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| 185 | str[2]='r'; |
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| 186 | str[3]='='; |
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| 187 | itoa((enc28j60getrev()),&(str[4]),10); |
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| 188 | make_udp_reply_from_request(buf,str,strnlen(str,10),myport); |
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| 189 | } |
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| 190 | } |
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| 191 | } |
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| 192 | return (0); |
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| 193 | } |