Diff: main.cpp

Revision:

0:8ef98f26a429

diff -r 000000000000 -r 8ef98f26a429 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 13 13:33:09 2017 +0000
@@ -0,0 +1,188 @@
+/*-- SERVER INCLUDES ---------------------------------------------------------*/
+#include "mbed.h"
+#include "EthernetInterface.h"
+/*-- GLOBAL CONSTANTS --------------------------------------------------------*/
+const int PORT = 7;                             //arbitrary port
+/*-- IP CONSTANT CONFIGURATION --*/
+static const char* SERVER_IP = "192.168.1.101"; //IP of server board
+
+static const char* MASK = "255.255.255.0";      //mask
+static const char* GATEWAY = "192.168.1.1";     //gateway
+/*-- INITIALISATION ----------------------------------------------------------*/
+Serial pc(USBTX, USBRX);        //create PC interface
+EthernetInterface eth;          //create ethernet
+UDPSocket server;               //create Ethernet server
+Endpoint client;                //create endpoint
+/* -- DECLARE LEDs for STATUS DISPLAY --*/
+DigitalOut red(LED_RED);
+DigitalOut green(LED_GREEN);
+DigitalOut blue(LED_BLUE);
+/*-- DECLARE INTERRUPTS --*/
+InterruptIn touch(SW2);
+InterruptIn butt3(SW3);
+Timer t_level, t_shuttle; //define timers to measure each level and shuttle
+/*--VARIABLES-----------------------------------------------------------------*/
+int i; //Loop iteration counter
+int n;                  //size of received message
+char message[6] = {0,01,1,1,'\0'};  //MESSAGE status[1],level[2],blue[1],line[1]
+char c_status[1], c_level[2], c_blue[1], c_line[1];  //receival buffers
+
+/*---- Status of program? ----*/
+/*------ 0 = Loaded      --*/
+/*------ 1 = Start       --*/
+/*------ 2 = In Progress --*/
+/*------ 3 = Stop        --*/
+int status, level; //Keep track of the level of the Beep Test
+bool line;  //Has runner crossed the line?
+
+/*-- FUNCTION DECLARATIONS ---------------------------------------------------*/
+void init_usb(void);    //initializes pc.printf if required
+void init_eth(void);    //initializes Ethernet
+void init_load(void);   //initialise program
+void send(void);        //Send packets
+void receive(void);     //receives packets
+int main(void);         //main
+
+
+/*-- INTERRUPT DEFINITIONS ---------------------------------------------------*/
+void ISR1()
+{
+    //Did the runner cross line in time, before showing RED?
+    if (red == 0) line = false; //Crossed line late
+    else line = true; // Crossed line in time
+}
+void ISR2()
+{
+    //Start/End Shuttle Run Test
+    if (status == 0) status = 1;
+    else status = 0;
+}
+
+/*-- FUNCTION DEFINITIONS ---------------------------------------------------*/
+/****INIT_USB BAUD RATE***/
+void init_usb(void)
+{
+    pc.baud(9600);    //baud rate
+}
+
+/****OPEN_ETHERNET CONNECTION***/
+void init_eth(void)
+{
+    eth.init(SERVER_IP, MASK, GATEWAY);                       //set up IP
+    eth.connect();                                       //connect ethernet
+    pc.printf("\nSERVER - Server IP Address is %s\r\n", eth.getIPAddress());    //get server IP address;
+
+    server.bind(PORT);                                       //bind server
+}
+
+/**** INITIALISE PROGRAM PARAMETERS***/
+void init_load(void)
+{
+    //Initialise flags and reset timers
+    level = 1; //Reset to starting level 1
+    line = true;
+    //Server LEDs flashes RED at 1Hz Loaded Status
+    red = !red;
+    green = 1;
+    blue = 1;
+    wait(0.5);
+    //Reset the timers
+    t_level.reset();
+    t_shuttle.reset(); //20*3600/(8000+500*level) = 144/(level+16) sec
+}
+
+/**** SEND MESSAGE ***/
+void send(void)
+{
+    sprintf(message, "%i %02i %i %i %c", status, level, int(blue), line, '\0');
+    server.sendTo(client, message, sizeof(message));
+    pc.printf("SERVER: Send '%s' to client %s\r\n", message, client.get_address()); //print message sent
+}
+
+/**** RECEIVE ***/
+void receive(void)
+{
+    pc.printf("\nSERVER: Waiting for UDP packet...\r\n");                                      //wait for packet
+    n = server.receiveFrom(client, message, sizeof(message)); //receive message from client
+    message[n] = ' ';                               //Remove \0 from message
+    pc.printf("SERVER: Received '%s' from client %s\r\n", message, client.get_address());   //print message from client
+    sscanf(message, "%s %s %s %s", &c_status, &c_level, &c_blue, &c_line);
+    status = atoi(c_status);
+    level = atoi(c_level);
+    blue = atoi(c_blue);
+    c_blue[0] = (blue == 0) ? '0' : '1';
+    line = atoi(c_line);
+    pc.printf("SERVER: Converted '%i %i %c %i' from client \r\n", status, level, c_blue[0], line);   //print converted message
+}   //end receive()
+
+/************ MAIN ************************************************************/
+int main(void)
+{
+    touch.fall(&ISR1); // attach address ISR to interrupt falling edge
+    butt3.rise(&ISR2); // attach address ISR to interrupt rising edge
+
+    init_usb();     //initialize the PC interface
+    init_eth();     //initialize the Ethernet connection
+    receive();     //Wait for connection from client
+    
+    while (true) { //Repeat forever
+        switch (status) {
+            case 0 :
+                init_load(); //Display PROGRAM LOADED (SERVER) status
+                break;
+            case 1 : //Start Beep Test
+                send();            //Send Message to client
+                t_level.start();   //Start timer to measure each level
+                t_shuttle.start(); //Start timer to specify each shuttle
+                red = 0;
+                status = 2; //Change status to In Progress
+                break;
+            case 2 : //Wait for message
+                receive();
+                if (line == false) {
+                    if (blue == 1) blue = 0;
+                    else {
+                        status = 3; //Stop the Beep Test
+                        break;
+                    }
+                } //end if-statement
+                line = true; //reset the line flag
+                if (t_level.read() >= 60) {
+                    level++; //New level
+                    t_level.reset();
+                    t_level.start();//New level - Restart timer
+                    for (i=0; i<4; i++) { //Flash green to indicate new level
+                        green = !green;
+                        wait_ms(250);
+                    }
+                } //end if-statement
+                red = 1;
+                green = 0; //Display Solid green
+                wait(72/(level+16)); //half(t_shuttle)
+                red = 0;  //Display solid Yellow
+                wait(72/(level+16));
+                send();               //Send message to client
+                green = 1;
+                break;
+            case 3 : //Stop the Beep Test, delay, then reload
+                red = blue = 0;
+                send();               //Send message to client                
+                //LED FLASHES PURPLE at 1HZ square waves for 2 minutes
+                for (i=0; i<180; i++){
+                    red = !red;
+                    blue = !blue;
+                    wait_ms(500);
+                }
+                status = 0; //Reset the Beep Test
+                break;
+            default :
+                red = 0; green = 1;
+                for (i=0; i<60; i++) { //FLASHING red green at 2Hz - status-error
+                    red = !red;
+                    green = !green;
+                    wait_ms(250);
+                }
+                return(0);
+        } //End Switch-statement
+    } //End while-loop
+}   //End Main()
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