317 lines
9.6 KiB
Text
317 lines
9.6 KiB
Text
#include "etherShield.h"
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// please modify the following two lines. mac and ip have to be unique
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// in your local area network. You can not have the same numbers in
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// two devices:
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static uint8_t mymac[6] = {0x54,0x55,0x58,0x10,0x00,0x24};
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static uint8_t myip[4] = {192,168,1,15};
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static char baseurl[]="http://192.168.1.15/";
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static uint16_t mywwwport =80; // listen port for tcp/www (max range 1-254)
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// or on a different port:
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//static char baseurl[]="http://10.0.0.24:88/";
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//static uint16_t mywwwport =88; // listen port for tcp/www (max range 1-254)
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//
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#define BUFFER_SIZE 500
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static uint8_t buf[BUFFER_SIZE+1];
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#define STR_BUFFER_SIZE 22
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static char strbuf[STR_BUFFER_SIZE+1];
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EtherShield es=EtherShield();
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// prepare the webpage by writing the data to the tcp send buffer
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uint16_t print_webpage(uint8_t *buf);
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int8_t analyse_cmd(char *str);
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// get current temperature
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#define TEMP_PIN 3
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void getCurrentTemp( int *sign, int *whole, int *fract);
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void setup(){
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/*initialize enc28j60*/
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es.ES_enc28j60Init(mymac);
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es.ES_enc28j60clkout(2); // change clkout from 6.25MHz to 12.5MHz
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delay(10);
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/* Magjack leds configuration, see enc28j60 datasheet, page 11 */
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// LEDA=greed LEDB=yellow
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//
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// 0x880 is PHLCON LEDB=on, LEDA=on
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// enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
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es.ES_enc28j60PhyWrite(PHLCON,0x880);
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delay(500);
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//
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// 0x990 is PHLCON LEDB=off, LEDA=off
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// enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
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es.ES_enc28j60PhyWrite(PHLCON,0x990);
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delay(500);
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//
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// 0x880 is PHLCON LEDB=on, LEDA=on
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// enc28j60PhyWrite(PHLCON,0b0000 1000 1000 00 00);
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es.ES_enc28j60PhyWrite(PHLCON,0x880);
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delay(500);
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//
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// 0x990 is PHLCON LEDB=off, LEDA=off
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// enc28j60PhyWrite(PHLCON,0b0000 1001 1001 00 00);
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es.ES_enc28j60PhyWrite(PHLCON,0x990);
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delay(500);
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//
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// 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit
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// enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10);
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es.ES_enc28j60PhyWrite(PHLCON,0x476);
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delay(100);
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//init the ethernet/ip layer:
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es.ES_init_ip_arp_udp_tcp(mymac,myip,80);
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// initialize DS18B20 datapin
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digitalWrite(TEMP_PIN, LOW);
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pinMode(TEMP_PIN, INPUT); // sets the digital pin as input (logic 1)
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}
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void loop(){
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uint16_t plen, dat_p;
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int8_t cmd;
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plen = es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf);
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/*plen will ne unequal to zero if there is a valid packet (without crc error) */
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if(plen!=0){
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// arp is broadcast if unknown but a host may also verify the mac address by sending it to a unicast address.
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if(es.ES_eth_type_is_arp_and_my_ip(buf,plen)){
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es.ES_make_arp_answer_from_request(buf);
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return;
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}
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// check if ip packets are for us:
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if(es.ES_eth_type_is_ip_and_my_ip(buf,plen)==0){
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return;
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}
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if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){
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es.ES_make_echo_reply_from_request(buf,plen);
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return;
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}
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// tcp port www start, compare only the lower byte
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if (buf[IP_PROTO_P]==IP_PROTO_TCP_V&&buf[TCP_DST_PORT_H_P]==0&&buf[TCP_DST_PORT_L_P]==mywwwport){
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if (buf[TCP_FLAGS_P] & TCP_FLAGS_SYN_V){
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es.ES_make_tcp_synack_from_syn(buf); // make_tcp_synack_from_syn does already send the syn,ack
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return;
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}
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if (buf[TCP_FLAGS_P] & TCP_FLAGS_ACK_V){
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es.ES_init_len_info(buf); // init some data structures
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dat_p=es.ES_get_tcp_data_pointer();
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if (dat_p==0){ // we can possibly have no data, just ack:
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if (buf[TCP_FLAGS_P] & TCP_FLAGS_FIN_V){
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es.ES_make_tcp_ack_from_any(buf);
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}
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return;
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}
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if (strncmp("GET ",(char *)&(buf[dat_p]),4)!=0){
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// head, post and other methods for possible status codes see:
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// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
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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>"));
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goto SENDTCP;
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}
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if (strncmp("/ ",(char *)&(buf[dat_p+4]),2)==0){
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plen=print_webpage(buf);
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goto SENDTCP;
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}
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cmd=analyse_cmd((char *)&(buf[dat_p+5]));
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if (cmd==1){
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plen=print_webpage(buf);
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}
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SENDTCP: es.ES_make_tcp_ack_from_any(buf); // send ack for http get
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es.ES_make_tcp_ack_with_data(buf,plen); // send data
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}
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}
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}
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}
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// The returned value is stored in the global var strbuf
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uint8_t find_key_val(char *str,char *key)
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{
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uint8_t found=0;
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uint8_t i=0;
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char *kp;
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kp=key;
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while(*str && *str!=' ' && found==0){
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if (*str == *kp){
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kp++;
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if (*kp == '\0'){
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str++;
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kp=key;
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if (*str == '='){
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found=1;
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}
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}
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}else{
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kp=key;
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}
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str++;
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}
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if (found==1){
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// copy the value to a buffer and terminate it with '\0'
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while(*str && *str!=' ' && *str!='&' && i<STR_BUFFER_SIZE){
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strbuf[i]=*str;
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i++;
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str++;
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}
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strbuf[i]='\0';
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}
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return(found);
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}
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int8_t analyse_cmd(char *str)
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{
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int8_t r=-1;
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if (find_key_val(str,"cmd")){
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if (*strbuf < 0x3a && *strbuf > 0x2f){
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// is a ASCII number, return it
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r=(*strbuf-0x30);
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}
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}
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return r;
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}
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uint16_t print_webpage(uint8_t *buf)
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{
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char temp_string[10];
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int i=0;
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//char *temp_string="100";
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uint16_t plen;
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getCurrentTemp(temp_string);
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plen=es.ES_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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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<center><p><h1>Welcome to Arduino Ethernet Shield V1.0 </h1></p> "));
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<hr><br><form METHOD=get action=\""));
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plen=es.ES_fill_tcp_data(buf,plen,baseurl);
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("\">"));
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<h2> Current Temperature is </h2> "));
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<h1><font color=\"#00FF00\"> "));
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while (temp_string[i]) {
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buf[TCP_CHECKSUM_L_P+3+plen]=temp_string[i++];
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plen++;
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}
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR(" °C</font></h1><br> ") );
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<input type=hidden name=cmd value=1>"));
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("<input type=submit value=\"Get Temperature\"></form>"));
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plen=es.ES_fill_tcp_data_p(buf,plen,PSTR("</center><hr> <p> V1.0 <a href=\"http://www.nuelectronics.com\">www.nuelectronics.com<a>"));
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return(plen);
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}
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void OneWireReset(int Pin) // reset. Should improve to act as a presence pulse
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{
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digitalWrite(Pin, LOW);
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pinMode(Pin, OUTPUT); // bring low for 500 us
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delayMicroseconds(500);
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pinMode(Pin, INPUT);
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delayMicroseconds(500);
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}
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void OneWireOutByte(int Pin, byte d) // output byte d (least sig bit first).
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{
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byte n;
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for(n=8; n!=0; n--)
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{
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if ((d & 0x01) == 1) // test least sig bit
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{
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digitalWrite(Pin, LOW);
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pinMode(Pin, OUTPUT);
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delayMicroseconds(5);
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pinMode(Pin, INPUT);
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delayMicroseconds(60);
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}
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else
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{
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digitalWrite(Pin, LOW);
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pinMode(Pin, OUTPUT);
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delayMicroseconds(60);
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pinMode(Pin, INPUT);
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}
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d=d>>1; // now the next bit is in the least sig bit position.
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}
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}
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byte OneWireInByte(int Pin) // read byte, least sig byte first
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{
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byte d, n, b;
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for (n=0; n<8; n++)
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{
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digitalWrite(Pin, LOW);
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pinMode(Pin, OUTPUT);
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delayMicroseconds(5);
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pinMode(Pin, INPUT);
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delayMicroseconds(5);
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b = digitalRead(Pin);
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delayMicroseconds(50);
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d = (d >> 1) | (b<<7); // shift d to right and insert b in most sig bit position
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}
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return(d);
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}
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void getCurrentTemp(char *temp)
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{
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int HighByte, LowByte, TReading, Tc_100, sign, whole, fract;
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OneWireReset(TEMP_PIN);
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OneWireOutByte(TEMP_PIN, 0xcc);
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OneWireOutByte(TEMP_PIN, 0x44); // perform temperature conversion, strong pullup for one sec
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OneWireReset(TEMP_PIN);
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OneWireOutByte(TEMP_PIN, 0xcc);
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OneWireOutByte(TEMP_PIN, 0xbe);
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LowByte = OneWireInByte(TEMP_PIN);
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HighByte = OneWireInByte(TEMP_PIN);
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TReading = (HighByte << 8) + LowByte;
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sign = TReading & 0x8000; // test most sig bit
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if (sign) // negative
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{
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TReading = (TReading ^ 0xffff) + 1; // 2's comp
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}
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Tc_100 = (6 * TReading) + TReading / 4; // multiply by (100 * 0.0625) or 6.25
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whole = Tc_100 / 100; // separate off the whole and fractional portions
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fract = Tc_100 % 100;
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if(sign) temp[0]='-';
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else temp[0]='+';
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if(whole/100==0)
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temp[1] =' ';
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else
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temp[1]= whole/100+'0';
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temp[2]= (whole-(whole/100)*100)/10 +'0' ;
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temp[3]= whole-(whole/10)*10 +'0';
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temp[4]='.';
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temp[5]=fract/10 +'0';
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temp[6]=fract-(fract/10)*10 +'0';
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temp[7] = '\0';
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}
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