Stephen Ralph / Mbed 2 deprecated CryptoPenEncrypt

Pt. 2 | Encryption encrypt program

Dependencies:   mbed 4DGL-uLCD-SE SDFileSystem PinDetect

main.cpp@0:35bd4a705079, 2019-01-03 (annotated)

Committer:
sralph3
Date:
Thu Jan 03 22:36:11 2019 +0000
Revision:
0:35bd4a705079
Pt. 2 | Encryption decrypt program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sralph3 0:35bd4a705079 1 #include "mbed.h"
sralph3 0:35bd4a705079 2 #include "PinDetect.h"
sralph3 0:35bd4a705079 3 #include "uLCD_4DGL.h"
sralph3 0:35bd4a705079 4 #include "SDFileSystem.h"
sralph3 0:35bd4a705079 5 #include "Letter.h"
sralph3 0:35bd4a705079 6 uLCD_4DGL uLCD(p28, p27, p29); // serial tx, serial rx, reset pin;
sralph3 0:35bd4a705079 7 SDFileSystem sd(p5, p6, p7, p8, "sd");
sralph3 0:35bd4a705079 8
sralph3 0:35bd4a705079 9 //declare objects for pins used with pushbuttons
sralph3 0:35bd4a705079 10 PinDetect pb1(p18);
sralph3 0:35bd4a705079 11 PinDetect pb2(p17);
sralph3 0:35bd4a705079 12 PinDetect pb3(p16);
sralph3 0:35bd4a705079 13
sralph3 0:35bd4a705079 14 //Populate arrayCipher from cipher on SD
sralph3 0:35bd4a705079 15 char arrayCipher [1001];
sralph3 0:35bd4a705079 16
sralph3 0:35bd4a705079 17 enum InputType {FWD,BACK,ENC,NON};
sralph3 0:35bd4a705079 18 enum StateType {Q0, Q1, Q2, Q3};
sralph3 0:35bd4a705079 19 Letter currLetter;
sralph3 0:35bd4a705079 20 int position=0;
sralph3 0:35bd4a705079 21 FILE *fp2;
sralph3 0:35bd4a705079 22
sralph3 0:35bd4a705079 23 InputType input = NON;
sralph3 0:35bd4a705079 24 StateType state = Q0;
sralph3 0:35bd4a705079 25
sralph3 0:35bd4a705079 26 //Encrypt
sralph3 0:35bd4a705079 27 char encrypt (char inp, char arrayCipher[], int startPt)
sralph3 0:35bd4a705079 28 {
sralph3 0:35bd4a705079 29 int sum = (arrayCipher[startPt]-65) + (inp-65);
sralph3 0:35bd4a705079 30 sum = sum % 26;
sralph3 0:35bd4a705079 31 char sumC = sum;
sralph3 0:35bd4a705079 32 return sumC+65;
sralph3 0:35bd4a705079 33 }
sralph3 0:35bd4a705079 34
sralph3 0:35bd4a705079 35 // Callback routine is interrupt activated by a debounced pb3 hit
sralph3 0:35bd4a705079 36 void pb3_hit_callback (void)
sralph3 0:35bd4a705079 37 {
sralph3 0:35bd4a705079 38 if (state==Q0){
sralph3 0:35bd4a705079 39 uLCD.cls();
sralph3 0:35bd4a705079 40 uLCD.printf("ENCRYPTING");
sralph3 0:35bd4a705079 41 wait(1.0);
sralph3 0:35bd4a705079 42 char inC = currLetter.getChar();
sralph3 0:35bd4a705079 43 char outC=encrypt(inC, arrayCipher, position);
sralph3 0:35bd4a705079 44 uLCD.cls();
sralph3 0:35bd4a705079 45
sralph3 0:35bd4a705079 46 uLCD.locate(0,0);
sralph3 0:35bd4a705079 47 uLCD.text_width(5);
sralph3 0:35bd4a705079 48 uLCD.text_height(5);
sralph3 0:35bd4a705079 49
sralph3 0:35bd4a705079 50
sralph3 0:35bd4a705079 51 uLCD.printf("%c", outC);
sralph3 0:35bd4a705079 52 position++;
sralph3 0:35bd4a705079 53
sralph3 0:35bd4a705079 54 //update position in txt doc
sralph3 0:35bd4a705079 55 fp2 = fopen("/sd/mydir/positionCipherSender.txt", "w");
sralph3 0:35bd4a705079 56 if(fp2 == NULL) {
sralph3 0:35bd4a705079 57 uLCD.printf("Error Open \n");
sralph3 0:35bd4a705079 58 }
sralph3 0:35bd4a705079 59 else{
sralph3 0:35bd4a705079 60 fprintf(fp2, "%i",position);
sralph3 0:35bd4a705079 61 fclose(fp2);
sralph3 0:35bd4a705079 62 }
sralph3 0:35bd4a705079 63
sralph3 0:35bd4a705079 64 wait(1.0);
sralph3 0:35bd4a705079 65 uLCD.cls();
sralph3 0:35bd4a705079 66 input = ENC;
sralph3 0:35bd4a705079 67 }
sralph3 0:35bd4a705079 68 else{
sralph3 0:35bd4a705079 69 input=ENC;
sralph3 0:35bd4a705079 70 }
sralph3 0:35bd4a705079 71
sralph3 0:35bd4a705079 72 }
sralph3 0:35bd4a705079 73 // Callback routine is interrupt activated by a debounced pb1 hit
sralph3 0:35bd4a705079 74 void pb1_hit_callback (void)
sralph3 0:35bd4a705079 75 {
sralph3 0:35bd4a705079 76 // ADD CODE HERE THAT YOU WHAT TO RUN WHEN INTERUPT IS GENERATED
sralph3 0:35bd4a705079 77 currLetter.inc();
sralph3 0:35bd4a705079 78 }
sralph3 0:35bd4a705079 79
sralph3 0:35bd4a705079 80 // Callback routine is interrupt activated by a debounced pb2 hit
sralph3 0:35bd4a705079 81 void pb2_hit_callback (void)
sralph3 0:35bd4a705079 82 {
sralph3 0:35bd4a705079 83 currLetter.dec();
sralph3 0:35bd4a705079 84 }
sralph3 0:35bd4a705079 85
sralph3 0:35bd4a705079 86
sralph3 0:35bd4a705079 87 int main() {
sralph3 0:35bd4a705079 88
sralph3 0:35bd4a705079 89 FILE *fp = fopen("/sd/mydir/OTP.txt", "r");
sralph3 0:35bd4a705079 90 if(fp == NULL){
sralph3 0:35bd4a705079 91 uLCD.printf("Open Error!!!\n");
sralph3 0:35bd4a705079 92 }
sralph3 0:35bd4a705079 93 else{
sralph3 0:35bd4a705079 94 fscanf(fp, "%s", arrayCipher);
sralph3 0:35bd4a705079 95 fclose(fp);
sralph3 0:35bd4a705079 96 }
sralph3 0:35bd4a705079 97
sralph3 0:35bd4a705079 98 FILE *fp2 = fopen("/sd/mydir/positionCipherSender.txt", "r");
sralph3 0:35bd4a705079 99 if(fp2 == NULL) {
sralph3 0:35bd4a705079 100 uLCD.printf("Open Error!!!\n");
sralph3 0:35bd4a705079 101 }
sralph3 0:35bd4a705079 102 else{
sralph3 0:35bd4a705079 103 fscanf(fp2, "%i",&position);
sralph3 0:35bd4a705079 104 fclose(fp2);
sralph3 0:35bd4a705079 105 }
sralph3 0:35bd4a705079 106
sralph3 0:35bd4a705079 107 // int sizeIn = sizeof(inChars)/sizeof(*inChars);
sralph3 0:35bd4a705079 108
sralph3 0:35bd4a705079 109
sralph3 0:35bd4a705079 110 pb1.mode(PullUp);
sralph3 0:35bd4a705079 111 pb2.mode(PullUp);
sralph3 0:35bd4a705079 112 pb3.mode(PullUp);
sralph3 0:35bd4a705079 113
sralph3 0:35bd4a705079 114 // Delay for initial pullup to take effect
sralph3 0:35bd4a705079 115 wait(.01);
sralph3 0:35bd4a705079 116
sralph3 0:35bd4a705079 117 // Setup Interrupt callback functions for a pb hit
sralph3 0:35bd4a705079 118 pb1.attach_deasserted(&pb1_hit_callback);
sralph3 0:35bd4a705079 119 pb2.attach_deasserted(&pb2_hit_callback);
sralph3 0:35bd4a705079 120 pb3.attach_deasserted(&pb3_hit_callback);
sralph3 0:35bd4a705079 121
sralph3 0:35bd4a705079 122 // Start sampling pb inputs using interrupts
sralph3 0:35bd4a705079 123 pb1.setSampleFrequency(); //default is 20KHz sampling
sralph3 0:35bd4a705079 124 pb2.setSampleFrequency();
sralph3 0:35bd4a705079 125 pb3.setSampleFrequency();
sralph3 0:35bd4a705079 126 // pushbuttons now setup and running
sralph3 0:35bd4a705079 127
sralph3 0:35bd4a705079 128 while(1) {
sralph3 0:35bd4a705079 129 switch(state){
sralph3 0:35bd4a705079 130 case(Q0):
sralph3 0:35bd4a705079 131 //Produce output for this state
sralph3 0:35bd4a705079 132 uLCD.locate(0,0);
sralph3 0:35bd4a705079 133 uLCD.text_width(5);
sralph3 0:35bd4a705079 134 uLCD.text_height(5);
sralph3 0:35bd4a705079 135 uLCD.printf("%c",currLetter.getChar());
sralph3 0:35bd4a705079 136 wait(.5);
sralph3 0:35bd4a705079 137 //calculate next state
sralph3 0:35bd4a705079 138 if (input == ENC){
sralph3 0:35bd4a705079 139 state = Q1;
sralph3 0:35bd4a705079 140 input=NON;
sralph3 0:35bd4a705079 141 }
sralph3 0:35bd4a705079 142 else{ //input should be stay
sralph3 0:35bd4a705079 143 state = Q0;
sralph3 0:35bd4a705079 144 }
sralph3 0:35bd4a705079 145 break;
sralph3 0:35bd4a705079 146
sralph3 0:35bd4a705079 147 case (Q1):
sralph3 0:35bd4a705079 148 //Produce output for this state
sralph3 0:35bd4a705079 149
sralph3 0:35bd4a705079 150 uLCD.locate(0,0);
sralph3 0:35bd4a705079 151 uLCD.text_width(1);
sralph3 0:35bd4a705079 152 uLCD.text_height(1);
sralph3 0:35bd4a705079 153 uLCD.printf("Press Again To Encrypt More");
sralph3 0:35bd4a705079 154 //calculate next state
sralph3 0:35bd4a705079 155 if (input == ENC){
sralph3 0:35bd4a705079 156 state = Q0;
sralph3 0:35bd4a705079 157 input = NON;
sralph3 0:35bd4a705079 158 uLCD.cls();
sralph3 0:35bd4a705079 159 }
sralph3 0:35bd4a705079 160 else //input should be stay
sralph3 0:35bd4a705079 161 state = Q1;
sralph3 0:35bd4a705079 162 break;
sralph3 0:35bd4a705079 163
sralph3 0:35bd4a705079 164 }
sralph3 0:35bd4a705079 165 //end switch
sralph3 0:35bd4a705079 166 wait (0.1);
sralph3 0:35bd4a705079 167 }
sralph3 0:35bd4a705079 168 }