Jelle Raes / Mbed 2 deprecated VLC_decoder_copy_copy_omdatetkan

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Dependencies:   mbed

Fork of VLC_decoder_with_timeout by Jelle Raes

manchester.cpp@5:a9d2050d7a12, 2018-05-16 (annotated)

Committer:
JelleRaes
Date:
Wed May 16 08:19:42 2018 +0000
Revision:
5:a9d2050d7a12
Parent:
4:7ef585175a7b 
implemented stopcode;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JelleRaes 0:dad9d23791db 1 #include "mbed.h"
JelleRaes 0:dad9d23791db 2 #include "manchester.h"
JelleRaes 0:dad9d23791db 3
JelleRaes 3:4fad63952e4c 4 DigitalIn signal(p7);
JelleRaes 0:dad9d23791db 5 Serial pc(USBTX, USBRX);
JelleRaes 0:dad9d23791db 6 Timer timer;
JelleRaes 4:7ef585175a7b 7 Timeout timeout;
JelleRaes 0:dad9d23791db 8 int datal[] = {1,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0};
JelleRaes 3:4fad63952e4c 9 bool notTimedOut;
JelleRaes 0:dad9d23791db 10
JelleRaes 0:dad9d23791db 11 manchester::manchester()
JelleRaes 0:dad9d23791db 12 {
JelleRaes 0:dad9d23791db 13 }
JelleRaes 0:dad9d23791db 14
JelleRaes 0:dad9d23791db 15 int manchester::decode()
JelleRaes 0:dad9d23791db 16 {
JelleRaes 5:a9d2050d7a12 17
JelleRaes 0:dad9d23791db 18 int previous,current,begin,end=0;
JelleRaes 0:dad9d23791db 19 int time=0;
JelleRaes 0:dad9d23791db 20 int i = 0;
JelleRaes 3:4fad63952e4c 21 int datas[] = {1,1,1,1,0,0,0,0,0,0};
JelleRaes 3:4fad63952e4c 22 notTimedOut = true;
JelleRaes 0:dad9d23791db 23 timer.start();
JelleRaes 0:dad9d23791db 24 while(i< DELAY) {
JelleRaes 0:dad9d23791db 25 previous = current;
JelleRaes 0:dad9d23791db 26 current = signal.read();
JelleRaes 0:dad9d23791db 27 if(current != previous) {
JelleRaes 0:dad9d23791db 28 i=0;
JelleRaes 0:dad9d23791db 29 }
JelleRaes 0:dad9d23791db 30 i++;
JelleRaes 0:dad9d23791db 31 wait_us(100);
JelleRaes 0:dad9d23791db 32 }
JelleRaes 0:dad9d23791db 33 i = 0;
JelleRaes 4:7ef585175a7b 34 timeout.attach(callback(this,&manchester::isTimedOut), 3);
JelleRaes 4:7ef585175a7b 35 while(i<4 && notTimedOut) {
JelleRaes 0:dad9d23791db 36 end = begin;
JelleRaes 0:dad9d23791db 37 previous = current;
JelleRaes 0:dad9d23791db 38 current = signal.read();
JelleRaes 0:dad9d23791db 39 if(current<previous) {
JelleRaes 0:dad9d23791db 40 begin = timer.read_us();
JelleRaes 0:dad9d23791db 41 if(end != 0) {
JelleRaes 0:dad9d23791db 42 time +=(begin - end);
JelleRaes 0:dad9d23791db 43 }
JelleRaes 0:dad9d23791db 44 i++;
JelleRaes 0:dad9d23791db 45 }
JelleRaes 0:dad9d23791db 46 }
JelleRaes 3:4fad63952e4c 47 if(notTimedOut == true) {
JelleRaes 3:4fad63952e4c 48 float atime=((float)time/3000000);
JelleRaes 3:4fad63952e4c 49 i=4;
JelleRaes 0:dad9d23791db 50 wait(atime/2);
JelleRaes 3:4fad63952e4c 51 while(i<10) {
JelleRaes 3:4fad63952e4c 52 int x = signal.read();
JelleRaes 3:4fad63952e4c 53 wait(atime/2);
JelleRaes 3:4fad63952e4c 54 int y = signal.read();
JelleRaes 3:4fad63952e4c 55 wait(atime/2);
JelleRaes 0:dad9d23791db 56
JelleRaes 3:4fad63952e4c 57 if(x<y) {
JelleRaes 3:4fad63952e4c 58 datas[i]=0;
JelleRaes 3:4fad63952e4c 59 } else if(x>y) {
JelleRaes 3:4fad63952e4c 60 datas[i]=1;
JelleRaes 3:4fad63952e4c 61 }
JelleRaes 3:4fad63952e4c 62 i++;
JelleRaes 0:dad9d23791db 63 }
JelleRaes 3:4fad63952e4c 64 wait(1);
JelleRaes 3:4fad63952e4c 65 pc.printf("\n\raverage time is = %f s\n\r",atime);
JelleRaes 3:4fad63952e4c 66 pc.printf("with frequency %f\n\r",1/atime);
JelleRaes 3:4fad63952e4c 67 pc.printf("data is:");
JelleRaes 3:4fad63952e4c 68 int direction = getDirection(datas);
JelleRaes 5:a9d2050d7a12 69 bool stopcode =getStopCode(datas);
JelleRaes 3:4fad63952e4c 70 for(int j = 0; j<10; j++) {
JelleRaes 3:4fad63952e4c 71 printf("%d",datas[j]);
JelleRaes 3:4fad63952e4c 72 }
JelleRaes 3:4fad63952e4c 73 printf("with direction:%d\r\n",direction);
JelleRaes 3:4fad63952e4c 74 timer.stop();
JelleRaes 5:a9d2050d7a12 75 if(stopcode==true){
JelleRaes 5:a9d2050d7a12 76 return direction;
JelleRaes 5:a9d2050d7a12 77 }
JelleRaes 5:a9d2050d7a12 78 else{
JelleRaes 5:a9d2050d7a12 79 return 5;
JelleRaes 5:a9d2050d7a12 80 }
JelleRaes 5:a9d2050d7a12 81 //return direction;
JelleRaes 3:4fad63952e4c 82 } else {
JelleRaes 3:4fad63952e4c 83 printf("timed out\r\n");
JelleRaes 3:4fad63952e4c 84 return 4;
JelleRaes 0:dad9d23791db 85 }
JelleRaes 5:a9d2050d7a12 86 //}
JelleRaes 0:dad9d23791db 87 }
JelleRaes 0:dad9d23791db 88
JelleRaes 0:dad9d23791db 89 int manchester::getDirection(int* data)
JelleRaes 0:dad9d23791db 90 {
JelleRaes 0:dad9d23791db 91 int direction;
JelleRaes 0:dad9d23791db 92 if(data[4]==0) {
JelleRaes 0:dad9d23791db 93 if(data[5]==0) {
JelleRaes 0:dad9d23791db 94 direction = 0;
JelleRaes 0:dad9d23791db 95 } else {
JelleRaes 0:dad9d23791db 96 direction = 1;
JelleRaes 0:dad9d23791db 97 }
JelleRaes 0:dad9d23791db 98 } else {
JelleRaes 0:dad9d23791db 99 if(data[5]==0) {
JelleRaes 0:dad9d23791db 100 direction = 2;
JelleRaes 0:dad9d23791db 101 } else {
JelleRaes 0:dad9d23791db 102 direction = 3;
JelleRaes 0:dad9d23791db 103 }
JelleRaes 0:dad9d23791db 104 }
JelleRaes 0:dad9d23791db 105 return direction;
JelleRaes 0:dad9d23791db 106 }
JelleRaes 3:4fad63952e4c 107
JelleRaes 3:4fad63952e4c 108 void manchester::isTimedOut()
JelleRaes 3:4fad63952e4c 109 {
JelleRaes 3:4fad63952e4c 110 notTimedOut = false;
JelleRaes 3:4fad63952e4c 111 }
JelleRaes 3:4fad63952e4c 112
JelleRaes 5:a9d2050d7a12 113 bool manchester::getStopCode(int* data)
JelleRaes 3:4fad63952e4c 114 {
JelleRaes 5:a9d2050d7a12 115 bool code= true;
JelleRaes 5:a9d2050d7a12 116 int test[] = {0,0,0,0,0,0,0,0,0,1};
JelleRaes 5:a9d2050d7a12 117 for(int i = 6; i < 10; i++){
JelleRaes 5:a9d2050d7a12 118 if(data[i]==test[i]){
JelleRaes 5:a9d2050d7a12 119 code = true;
JelleRaes 5:a9d2050d7a12 120 }
JelleRaes 5:a9d2050d7a12 121 else{
JelleRaes 5:a9d2050d7a12 122 code = false;
JelleRaes 5:a9d2050d7a12 123 break;
JelleRaes 5:a9d2050d7a12 124 }
JelleRaes 5:a9d2050d7a12 125 }
JelleRaes 5:a9d2050d7a12 126 return code;
JelleRaes 3:4fad63952e4c 127 }