University of Plymouth - Stages 1, 2 and 3 / ELEC350-Coursework-2017

Library of hardware declarations and utility functions for the ELEC350/1 Practicals and Coursework

Dependents:   ELEC351_v1 ELEC350-CWTEMPLATE-2017 ELEC350-CWTEMPLATE-2017 ELEC350-CWTEMPLATE-2018

Fork of ELEC350-Practicals-FZ429 by University of Plymouth - Stages 1, 2 and 3

Networkbits.cpp@8:df979097cc71, 2017-12-07 (annotated)

Committer:
noutram
Date:
Thu Dec 07 15:28:16 2017 +0000
Revision:
8:df979097cc71
Library for ELEC350 and ELEC351 2017

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 8:df979097cc71 1 #include "sample_hardware.hpp"
noutram 8:df979097cc71 2 #include "Networkbits.hpp"
noutram 8:df979097cc71 3
noutram 8:df979097cc71 4 //Network thread - responsible for listening for connectinos and responding with updated tempature values
noutram 8:df979097cc71 5 void networktest()
noutram 8:df979097cc71 6 {
noutram 8:df979097cc71 7 //This only runs when BOTH switches are pressed down
noutram 8:df979097cc71 8 if ((SW1 == 0) || (SW2 == 0)) return;
noutram 8:df979097cc71 9
noutram 8:df979097cc71 10 lcd.cls();
noutram 8:df979097cc71 11 lcd.printf("Basic HTTP server example\n");
noutram 8:df979097cc71 12
noutram 8:df979097cc71 13 //Configure an ethernet connection
noutram 8:df979097cc71 14 EthernetInterface eth;
noutram 8:df979097cc71 15 eth.set_network(IP, NETMASK, GATEWAY);
noutram 8:df979097cc71 16 eth.connect();
noutram 8:df979097cc71 17 lcd.printf("The target IP address is '%s'\n", eth.get_ip_address());
noutram 8:df979097cc71 18
noutram 8:df979097cc71 19 //Now setup a web server
noutram 8:df979097cc71 20 TCPServer srv; //TCP/IP Server
noutram 8:df979097cc71 21 TCPSocket clt_sock; //Socket for communication
noutram 8:df979097cc71 22 SocketAddress clt_addr; //Address of incoming connection
noutram 8:df979097cc71 23
noutram 8:df979097cc71 24 /* Open the server on ethernet stack */
noutram 8:df979097cc71 25 srv.open(&eth);
noutram 8:df979097cc71 26
noutram 8:df979097cc71 27 /* Bind the HTTP port (TCP 80) to the server */
noutram 8:df979097cc71 28 srv.bind(eth.get_ip_address(), 80);
noutram 8:df979097cc71 29
noutram 8:df979097cc71 30 /* Can handle 5 simultaneous connections */
noutram 8:df979097cc71 31 srv.listen(5);
noutram 8:df979097cc71 32
noutram 8:df979097cc71 33 //KEEP RESPONDING WHILE THE SWITCHES ARE PRESSED
noutram 8:df979097cc71 34 while ((SW1 == 1) && (SW2 == 1)) {
noutram 8:df979097cc71 35 using namespace std;
noutram 8:df979097cc71 36 lcd.cls();
noutram 8:df979097cc71 37 lcd.printf("Open 10.0.0.1 in a browser\n");
noutram 8:df979097cc71 38
noutram 8:df979097cc71 39 //Block and wait on an incoming connection
noutram 8:df979097cc71 40 srv.accept(&clt_sock, &clt_addr);
noutram 8:df979097cc71 41 printf("accept %s:%d\n", clt_addr.get_ip_address(), clt_addr.get_port());
noutram 8:df979097cc71 42
noutram 8:df979097cc71 43 //Uses a C++ string to make it easier to concatinate
noutram 8:df979097cc71 44 string response;
noutram 8:df979097cc71 45 //This is a C string
noutram 8:df979097cc71 46 char ldr_str[64];
noutram 8:df979097cc71 47
noutram 8:df979097cc71 48 //Read the temperature value - note that getParameters() is thread safe
noutram 8:df979097cc71 49 float temp = sensor.getTemperature();
noutram 8:df979097cc71 50
noutram 8:df979097cc71 51 //Convert to a C String
noutram 8:df979097cc71 52 sprintf(ldr_str, "%5.3f", temp );
noutram 8:df979097cc71 53 printf("LDR: %5.3f\n\r", temp);
noutram 8:df979097cc71 54
noutram 8:df979097cc71 55 //Build the C++ string response
noutram 8:df979097cc71 56 response = HTTP_MESSAGE_BODY1;
noutram 8:df979097cc71 57 response += ldr_str;
noutram 8:df979097cc71 58 response += HTTP_MESSAGE_BODY2;
noutram 8:df979097cc71 59
noutram 8:df979097cc71 60 //Send static HTML response (as a C string)
noutram 8:df979097cc71 61 clt_sock.send(response.c_str(), response.size()+6);
noutram 8:df979097cc71 62 }
noutram 8:df979097cc71 63
noutram 8:df979097cc71 64 printf("Release BOTH switches\n");
noutram 8:df979097cc71 65 lcd.printf("Release BOTH switches\n");
noutram 8:df979097cc71 66 while ((SW1 != 0) && (SW2 != 0));
noutram 8:df979097cc71 67 wait(0.5); //debounce
noutram 8:df979097cc71 68 }