Diff: main.cpp

Revision:

0:849cb182c518

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Jan 28 00:13:04 2010 +0000
@@ -0,0 +1,143 @@
+#include "mbed.h"
+#include <string>
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut myled4(LED4);
+
+LocalFileSystem local("local");               // Create the local filesystem under the name "local"
+
+//function protypes
+char encrypt(char c);
+void flashLights();
+
+int main() {
+    flashLights();
+    //print to a file saved on the mbed mass storage device
+    FILE *fp = fopen("/local/out.txt", "w");  // Open "out.txt" on the local file system for writing
+    fprintf(fp, "Hello text doc World!");
+    fclose(fp);
+
+    //print some more
+    fp = fopen("/local/out.txt", "a");  // Open "out.txt" on the local file system for writing, appending
+    fprintf(fp, " log begins here: /n");
+    fclose(fp);
+
+    //print to the serial port, that requres an extra driver for xp
+    Serial pc(USBTX, USBRX); // tx, rx
+    pc.printf("Hello serial comms World!\n");
+
+    bool commandIncoming=false;          //using a singal char to then expect a command char
+    bool echoOn=true;                    //echo will eventually be output to the other USB port, and will be renamed pass through
+    bool loggingOn=true;                 //log all the chars pressed to a text file
+    bool encrypting=false;               //encrypting using the one time pad - exclude output chars * and others(todo: make a output map)
+    char cOut;                           //the char being echod (or put out to the PC), is the cyphertext if encrypting is true
+    char c;                              //the char coming in from the keyboard
+
+    while (1) {
+
+        //get a char from the keyboard (USB input)
+        c = pc.getc();
+
+        if (loggingOn) {
+            fp = fopen("/local/out.txt", "a");  // Open "out.txt" on the local file system for writing, appending
+            //todo: find a nicer way of doing this
+            string s;
+            s = c;
+            fprintf(fp,"%s",s);
+            fclose(fp);
+        }
+        //responsible for the output (at the moment to the serial comms, but eventually to the PC (USB output))
+        if (c!='*'&&!commandIncoming && echoOn) {
+            if (encrypting) {
+                cOut = encrypt(c);
+            } else {
+                cOut = c;
+            }
+            pc.putc(cOut);
+        }
+        if (commandIncoming) {
+            commandIncoming = false;
+            //password recall
+            if (c=='p') {
+                pc.puts("default password");
+            }
+            //username recall
+            if (c=='u') {
+                pc.puts("default username");
+            }
+            //echo on/ off - debug (should be on all the time)
+            if (c=='e') {
+                if (echoOn==true) {
+                    pc.puts("key echo off");
+                    echoOn=false;
+                    myled1 = 1;
+                } else {
+                    //when passing through myled1 is dim
+                    pc.puts("key echo on");
+                    echoOn=true;
+                    myled1 = 0;
+                }
+            }
+            //dump keylogged data (paste anywhere functionality)
+            if (c=='d') {
+                pc.puts("the data");
+                //recall the last x keys pressed or pull data from the txt file
+            }
+            if (c=='l') {
+                if (loggingOn==true) {
+                    pc.puts("key logging off");
+                    loggingOn=false;
+                    //when loggingOn myled1 is dim
+                    myled2 = 1;
+                } else {
+                    pc.puts("key logging on");
+                    loggingOn=true;
+                    myled2 = 0;
+                }
+            }
+            if (c=='c') {
+                if (encrypting==true) {
+                    pc.puts("exiting the encryption mode");
+                    encrypting = false;
+                    //when encrypting myled3 is bright
+                    myled3 = 0;
+                } else {
+                    pc.puts("entering the encryption mode - command keys are the same as before");
+                    encrypting = true;
+                    myled3 = 1;
+                }
+            }
+        }
+        //if the key is the start of a command, read the next key as a command (ie *p means output password)
+        if (c== '*') {
+            commandIncoming = true;
+        }
+    }
+}
+
+//eventually have this a one time pad, drawing chars from another file,
+//deleting them as they go, and somehow having them not readable while in storage
+char encrypt(char c) {
+    return (c+1);
+}
+
+void flashLights() {
+    //blink some lights
+    myled1 = 1;
+    wait(0.2);
+    myled1 = 0;
+    wait(0.2);
+
+    myled1 = 1;
+    myled2 = 1;
+    myled3 = 1;
+    myled4 = 1;
+
+    wait(0.2);
+    myled1 = 0;
+    myled2 = 0;
+    myled3 = 0;
+    myled4 = 0;
+}