Joe Sobchuk / Mbed 2 deprecated RFtrans_full

The transmitter's code for Home Security with RF

Dependencies:   hmac_md5 mbed

main.cpp@0:47380c5f575d, 2014-12-08 (annotated)

Committer:
jsobchuk3
Date:
Mon Dec 08 22:43:22 2014 +0000
Revision:
0:47380c5f575d
ECE 4180 Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jsobchuk3 0:47380c5f575d 1 #include "mbed.h"
jsobchuk3 0:47380c5f575d 2 #include "hmac_md5.h"
jsobchuk3 0:47380c5f575d 3 #include <stdio.h>
jsobchuk3 0:47380c5f575d 4 #include <string.h>
jsobchuk3 0:47380c5f575d 5
jsobchuk3 0:47380c5f575d 6 DigitalOut myled1(LED1);
jsobchuk3 0:47380c5f575d 7 DigitalOut myled2(LED2);
jsobchuk3 0:47380c5f575d 8
jsobchuk3 0:47380c5f575d 9 DigitalIn pb(p20);
jsobchuk3 0:47380c5f575d 10 Serial rf(p9,p10);
jsobchuk3 0:47380c5f575d 11
jsobchuk3 0:47380c5f575d 12
jsobchuk3 0:47380c5f575d 13 int main() {
jsobchuk3 0:47380c5f575d 14 pb.mode(PullUp);
jsobchuk3 0:47380c5f575d 15 // Delay for initial pullup to take effect
jsobchuk3 0:47380c5f575d 16 wait(.01);
jsobchuk3 0:47380c5f575d 17
jsobchuk3 0:47380c5f575d 18 rf.baud(1200);
jsobchuk3 0:47380c5f575d 19 int old_pb=0;
jsobchuk3 0:47380c5f575d 20 int new_pb;
jsobchuk3 0:47380c5f575d 21
jsobchuk3 0:47380c5f575d 22 /*const char * key = "Dhruvin";
jsobchuk3 0:47380c5f575d 23 const char * text = "open";
jsobchuk3 0:47380c5f575d 24 char output[26];
jsobchuk3 0:47380c5f575d 25 char output2[3];
jsobchuk3 0:47380c5f575d 26 */
jsobchuk3 0:47380c5f575d 27
jsobchuk3 0:47380c5f575d 28 int i = 0;
jsobchuk3 0:47380c5f575d 29 /*HMAC_MD5(key, text, output);
jsobchuk3 0:47380c5f575d 30 output2[0] = output[0];
jsobchuk3 0:47380c5f575d 31 output2[1] = output[1];
jsobchuk3 0:47380c5f575d 32 output2[2] = output[2];
jsobchuk3 0:47380c5f575d 33 */
jsobchuk3 0:47380c5f575d 34 char key[4] = "Dhr";
jsobchuk3 0:47380c5f575d 35 for (i = 0; i < 4; i++) {
jsobchuk3 0:47380c5f575d 36 key[i] = (key[i] + 5);
jsobchuk3 0:47380c5f575d 37 }
jsobchuk3 0:47380c5f575d 38 while (1) {
jsobchuk3 0:47380c5f575d 39 new_pb = pb;
jsobchuk3 0:47380c5f575d 40 if( (new_pb==0) && (old_pb==1) ) {
jsobchuk3 0:47380c5f575d 41 //Send out the real data whenever the button is pressed
jsobchuk3 0:47380c5f575d 42 rf.putc(key[0]);
jsobchuk3 0:47380c5f575d 43 rf.putc(key[1]);
jsobchuk3 0:47380c5f575d 44 rf.putc(key[2]);
jsobchuk3 0:47380c5f575d 45
jsobchuk3 0:47380c5f575d 46 //HMAC_MD5(output2, text, output2);
jsobchuk3 0:47380c5f575d 47 for (i = 0; i < 4; i++) {
jsobchuk3 0:47380c5f575d 48 key[i] = (key[i] + 5);
jsobchuk3 0:47380c5f575d 49 }
jsobchuk3 0:47380c5f575d 50
jsobchuk3 0:47380c5f575d 51 }
jsobchuk3 0:47380c5f575d 52
jsobchuk3 0:47380c5f575d 53 else {
jsobchuk3 0:47380c5f575d 54 //RF Transmit Code
jsobchuk3 0:47380c5f575d 55 myled1 = 0;
jsobchuk3 0:47380c5f575d 56 //Send 10101010 pattern when idle to keep receivers AGC gain locked to transmitters signal
jsobchuk3 0:47380c5f575d 57 //When receiver loses the signal lock (Around 10-30MS with no data change seen) it starts sending out noise
jsobchuk3 0:47380c5f575d 58 rf.putc(0xAA);
jsobchuk3 0:47380c5f575d 59 myled1 = 0;
jsobchuk3 0:47380c5f575d 60
jsobchuk3 0:47380c5f575d 61 }
jsobchuk3 0:47380c5f575d 62 old_pb = new_pb;
jsobchuk3 0:47380c5f575d 63
jsobchuk3 0:47380c5f575d 64 }
jsobchuk3 0:47380c5f575d 65 }