Tododix, dovresti aprire un nuovo post e non aggiungerti a questo di relinquished, cmq. ti posto un codice di un esempio che avevo modificato per accendere dei semplici led, ora non posso testarlo ma dovrebbe funzionare.
#include "etherShield.h"
// please modify the following two lines. mac and ip have to be unique
// in your local area network. You can not have the same numbers in
// two devices:
static uint8_t mymac[6] = {0x54,0x55,0x58,0x51,0x52,0x24};
static uint8_t myip[4] = {192,168,1,100};
static char baseurl[]="http://192.168.1.100/";
static uint16_t mywwwport =80; // listen port for tcp/www (max range 1-254)
#define BUFFER_SIZE 900
static uint8_t buf[BUFFER_SIZE+1];
#define STR_BUFFER_SIZE 22
static char strbuf[STR_BUFFER_SIZE+1];
EtherShield es=EtherShield();
// prepare the webpage by writing the data to the tcp send buffer
uint16_t print_webpage(uint8_t *buf, byte on_off);
int8_t analyse_cmd(char *str);
// LED (ricordati le resistenze...)
#define Led1 6
#define Led2 7
#define Led3 8
void setup(){
Serial.begin (115200);
Serial. print("Run..:");
Serial.println();
/*initialize enc28j60*/
es.ES_enc28j60Init(mymac);
es.ES_enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
delay(10);
es.ES_enc28j60PhyWrite(PHLCON,0x880);
delay(500);
es.ES_enc28j60PhyWrite(PHLCON,0x990);
delay(500);
es.ES_enc28j60PhyWrite(PHLCON,0x880);
delay(500);
es.ES_enc28j60PhyWrite(PHLCON,0x990);
delay(500);
es.ES_enc28j60PhyWrite(PHLCON,0x476);
delay(100);
es.ES_init_ip_arp_udp_tcp(mymac,myip,80);
/*set pinMode*/
pinMode(Led1, OUTPUT);
pinMode(Led2, OUTPUT);
pinMode(Led3, OUTPUT);
}
void loop(){
uint16_t plen, dat_p;
int8_t cmd;
byte on_off = 1;
plen = es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf);
/*plen will ne unequal to zero if there is a valid packet (without crc error) */
if(plen!=0){
// arp is broadcast if unknown but a host may also verify the mac address by sending it to a unicast address.
if(es.ES_eth_type_is_arp_and_my_ip(buf,plen)){
es.ES_make_arp_answer_from_request(buf);
return;
}
// check if ip packets are for us:
if(es.ES_eth_type_is_ip_and_my_ip(buf,plen)==0){
return;
}
if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
es.ES_make_echo_reply_from_request(buf,plen);
return;
}
// tcp port www start, compare only the lower byte
if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==mywwwport){
if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
es.ES_make_tcp_synack_from_syn(buf); // make_tcp_synack_from_syn does already send the syn,ack
return;
}
if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
es.ES_init_len_info(buf); // init some data structures
dat_p=es.ES_get_tcp_data_pointer();
if (dat_p==0){ // we can possibly have no data, just ack:
if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
es.ES_make_tcp_ack_from_any(buf);
}
return;
}
if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){
// head, post and other methods for possible status codes see:
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
plen=es.ES_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>"));
goto SENDTCP;
}
if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
plen=print_webpage(buf, on_off);
goto SENDTCP;
}
cmd=analyse_cmd((char *)&(buf[dat_p+5]));
// Led1 pin 6
if (cmd==1){
if (digitalRead(Led1)==LOW){
digitalWrite(Led1,HIGH);
//on_off=1;
}
else
digitalWrite(Led1,LOW);
// on_off=0;
}
// Led1 pin 7
if (cmd==2){
if (digitalRead(Led2)==LOW){
digitalWrite(Led2,HIGH);
// on_off=1;
}
else
digitalWrite(Led2,LOW);
// on_off=0;
}
// Led1 pin 8
if (cmd==3){
if (digitalRead(Led3)==LOW){
digitalWrite(Led3,HIGH);
// on_off=1;
}
else
digitalWrite(Led3,LOW);
// on_off=0;
}
//***************
plen=print_webpage(buf, 1);
//plen=print_webpage(buf, on_off);
plen=print_webpage(buf, on_off);
SENDTCP: es.ES_make_tcp_ack_from_any(buf); // send ack for http get
es.ES_make_tcp_ack_with_data(buf,plen); // send data
}
}
}
}
// The returned value is stored in the global var strbuf
uint8_t find_key_val(char *str,char *key)
{
uint8_t found=0;
uint8_t i=0;
char *kp;
kp=key;
while(*str && *str!=' ' && found==0){
if (*str == *kp){
kp++;
if (*kp == '\0'){
str++;
kp=key;
if (*str == '='){
found=1;
}
}
}else{
kp=key;
}
str++;
}
if (found==1){
// copy the value to a buffer and terminate it with '\0'
while(*str && *str!=' ' && *str!='&' && i<STR_BUFFER_SIZE){
strbuf[i]=*str;
i++;
str++;
}
strbuf[i]='\0';
}
return(found);
}
int8_t analyse_cmd(char *str)
{
int8_t r=-1;
if (find_key_val(str,"cmd")){
if (*strbuf < 0x3a && *strbuf > 0x2f){
// is a ASCII number, return it
r=(*strbuf-0x30);
}
}
return r;
}
uint16_t print_webpage(uint8_t *buf, byte on_off)
{
int i=0;
uint16_t plen;
plen=es.ES_fill_tcp_data_p(buf,0,PSTR("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n"));
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<center><p><h1>Welcome to Arduino Ethernet Shield V1.0 </h1></p> "));
//Led1
if (digitalRead (Led1)==HIGH){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=1'><button>Led1 OFF (8)</button></a>"));
}
else if (digitalRead (Led1)==LOW){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=1'><button>Led1 ON (8)</button></a>"));
}
//Led2
if (digitalRead (Led2)==HIGH){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=2' style='text-decoration:none;'><button>Led2 OFF (8)</button></a>"));
}
else if (digitalRead (Led2)==LOW){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=2' style='text-decoration:none;'><button>Led2 ON (8)</button></a>"));
}
//Led3
if (digitalRead (Led3)==HIGH){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=3' style='text-decoration:none;'><button>Led3 OFF (8)</button></a>"));
}
else if (digitalRead (Led3)==LOW){
plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<a href='cmd=3' style='text-decoration:none;'><button>Led3 ON (8)</button></a>"));
}
//End HTML
return(plen);
}