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Dependencies:   mbed

main_single_program.cpp@0:077b18c8febc, 2010-12-03 (annotated)

Committer:
edufascin
Date:
Fri Dec 03 06:35:42 2010 +0000
Revision:
0:077b18c8febc
Embedded EE202 HW2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
edufascin 0:077b18c8febc 1 #include "mbed.h"
edufascin 0:077b18c8febc 2 #include "string.h"
edufascin 0:077b18c8febc 3 #include "time.h"
edufascin 0:077b18c8febc 4
edufascin 0:077b18c8febc 5 #define numsamples 1
edufascin 0:077b18c8febc 6
edufascin 0:077b18c8febc 7 int touchsense1(void);
edufascin 0:077b18c8febc 8 int touchsense2(void);
edufascin 0:077b18c8febc 9 DigitalOut myLed1(LED1);
edufascin 0:077b18c8febc 10 DigitalOut myLed2(LED2);
edufascin 0:077b18c8febc 11 DigitalOut myLed3(LED3);
edufascin 0:077b18c8febc 12 AnalogIn input1(p20);
edufascin 0:077b18c8febc 13 DigitalIn charger1(p19);
edufascin 0:077b18c8febc 14 DigitalOut ground1(p18);
edufascin 0:077b18c8febc 15 AnalogIn input2(p17);
edufascin 0:077b18c8febc 16 DigitalIn charger2(p16);
edufascin 0:077b18c8febc 17 DigitalOut ground2(p15);
edufascin 0:077b18c8febc 18 Serial pc(USBTX,USBRX);
edufascin 0:077b18c8febc 19
edufascin 0:077b18c8febc 20
edufascin 0:077b18c8febc 21
edufascin 0:077b18c8febc 22 //This is called when the T0 capacitor is touched.
edufascin 0:077b18c8febc 23 int touchsense1(void) {
edufascin 0:077b18c8febc 24 float sample;
edufascin 0:077b18c8febc 25 ground1 = 0;
edufascin 0:077b18c8febc 26 charger1.mode(PullUp); //p19 used for charging the capacitor.
edufascin 0:077b18c8febc 27 charger1.mode(PullNone);
edufascin 0:077b18c8febc 28 sample = input1.read();
edufascin 0:077b18c8febc 29 if (sample < 0.3) {
edufascin 0:077b18c8febc 30 return 1;
edufascin 0:077b18c8febc 31 } else {
edufascin 0:077b18c8febc 32 return 0;
edufascin 0:077b18c8febc 33 }
edufascin 0:077b18c8febc 34 }
edufascin 0:077b18c8febc 35
edufascin 0:077b18c8febc 36 //This function is called when the T1 capacitor is touched.
edufascin 0:077b18c8febc 37
edufascin 0:077b18c8febc 38 int touchsense2(void) {
edufascin 0:077b18c8febc 39 float sample;
edufascin 0:077b18c8febc 40 ground2 = 0;
edufascin 0:077b18c8febc 41 charger2.mode(PullUp);
edufascin 0:077b18c8febc 42 charger2.mode(PullNone);
edufascin 0:077b18c8febc 43 sample = input2.read();
edufascin 0:077b18c8febc 44 if (sample < 0.4) {
edufascin 0:077b18c8febc 45 return 1;
edufascin 0:077b18c8febc 46 } else {
edufascin 0:077b18c8febc 47 return 0;
edufascin 0:077b18c8febc 48 }
edufascin 0:077b18c8febc 49 }
edufascin 0:077b18c8febc 50
edufascin 0:077b18c8febc 51
edufascin 0:077b18c8febc 52
edufascin 0:077b18c8febc 53
edufascin 0:077b18c8febc 54 int main() {
edufascin 0:077b18c8febc 55 //Getting the trigger string from the user
edufascin 0:077b18c8febc 56 /* Module-1 */
edufascin 0:077b18c8febc 57 char triggerString1[1];
edufascin 0:077b18c8febc 58 char triggerString2[1];
edufascin 0:077b18c8febc 59 int index1=0,index2 = 0;
edufascin 0:077b18c8febc 60 char realTriggerString[20];
edufascin 0:077b18c8febc 61 //char finalTriggerString[20];
edufascin 0:077b18c8febc 62 int count=0,i = 0;
edufascin 0:077b18c8febc 63 bool isSensor1Pressed = false;
edufascin 0:077b18c8febc 64 bool isSensor2Pressed = false;
edufascin 0:077b18c8febc 65 char inputChar;
edufascin 0:077b18c8febc 66
edufascin 0:077b18c8febc 67 int triggerStringlength;
edufascin 0:077b18c8febc 68 bool isStartEncountered = false;
edufascin 0:077b18c8febc 69 bool bitsEncountered = false;
edufascin 0:077b18c8febc 70
edufascin 0:077b18c8febc 71 int countBits = 0;
edufascin 0:077b18c8febc 72 int k = 0;
edufascin 0:077b18c8febc 73 //The user is allowed to enter the trigger string.
edufascin 0:077b18c8febc 74 a:
edufascin 0:077b18c8febc 75 char triggerString[30];char triggerStringBits[20]; count = 0;
edufascin 0:077b18c8febc 76 pc.printf("Enter the Trigger String: ");
edufascin 0:077b18c8febc 77
edufascin 0:077b18c8febc 78 while (1) {
edufascin 0:077b18c8febc 79 pc.putc(inputChar = pc.getc());
edufascin 0:077b18c8febc 80 if (inputChar == 'e' || inputChar == 'E') {
edufascin 0:077b18c8febc 81 triggerString[k] = inputChar;
edufascin 0:077b18c8febc 82 k++;
edufascin 0:077b18c8febc 83 break;
edufascin 0:077b18c8febc 84 } else {
edufascin 0:077b18c8febc 85 triggerString[k] = inputChar;
edufascin 0:077b18c8febc 86 k++;
edufascin 0:077b18c8febc 87 }
edufascin 0:077b18c8febc 88 }
edufascin 0:077b18c8febc 89 //All the entered characters from the user are strored in the array.
edufascin 0:077b18c8febc 90 triggerString[k] = '\0';
edufascin 0:077b18c8febc 91 //Getting the total length of the trigger string.
edufascin 0:077b18c8febc 92 while (triggerString[count] != '\0') {
edufascin 0:077b18c8febc 93 count++;
edufascin 0:077b18c8febc 94 }
edufascin 0:077b18c8febc 95 triggerStringlength = count;
edufascin 0:077b18c8febc 96 //Checking for the validity of the input validation string.
edufascin 0:077b18c8febc 97 for (int i = 0 ;i<triggerStringlength; i++)
edufascin 0:077b18c8febc 98 {
edufascin 0:077b18c8febc 99 if(triggerString[0] != 's' && triggerString[0] != 'S')
edufascin 0:077b18c8febc 100 {
edufascin 0:077b18c8febc 101 pc.printf("\n\nInvalid Trigger String 1\n");
edufascin 0:077b18c8febc 102 for(i=0;i<triggerStringlength;i++)
edufascin 0:077b18c8febc 103 {
edufascin 0:077b18c8febc 104 triggerString[i]='\0';
edufascin 0:077b18c8febc 105 }
edufascin 0:077b18c8febc 106 k=0;
edufascin 0:077b18c8febc 107 goto a;
edufascin 0:077b18c8febc 108 }
edufascin 0:077b18c8febc 109
edufascin 0:077b18c8febc 110 for(int j=1;j<triggerStringlength-2;j++)
edufascin 0:077b18c8febc 111 {
edufascin 0:077b18c8febc 112 if(triggerString[j] == '0' || triggerString[j] == '1' || triggerString[j] == ' ')
edufascin 0:077b18c8febc 113 {
edufascin 0:077b18c8febc 114 continue;
edufascin 0:077b18c8febc 115 }
edufascin 0:077b18c8febc 116 else
edufascin 0:077b18c8febc 117 {
edufascin 0:077b18c8febc 118 pc.printf("\n\nInvalid Trigger String2\n");
edufascin 0:077b18c8febc 119 for(i=0;i<triggerStringlength;i++)
edufascin 0:077b18c8febc 120 {
edufascin 0:077b18c8febc 121 triggerString[i]='\0';
edufascin 0:077b18c8febc 122 }
edufascin 0:077b18c8febc 123 k=0;
edufascin 0:077b18c8febc 124 goto a;
edufascin 0:077b18c8febc 125 }
edufascin 0:077b18c8febc 126 }
edufascin 0:077b18c8febc 127
edufascin 0:077b18c8febc 128
edufascin 0:077b18c8febc 129
edufascin 0:077b18c8febc 130 //If the input string contains spaces, simply continue.
edufascin 0:077b18c8febc 131 if (triggerString[i] == ' ') {
edufascin 0:077b18c8febc 132 continue;
edufascin 0:077b18c8febc 133 }
edufascin 0:077b18c8febc 134
edufascin 0:077b18c8febc 135 if (triggerString[i] == 'S' || triggerString[i] == 's') {
edufascin 0:077b18c8febc 136 isStartEncountered = true;
edufascin 0:077b18c8febc 137 continue;
edufascin 0:077b18c8febc 138 }
edufascin 0:077b18c8febc 139
edufascin 0:077b18c8febc 140 if (isStartEncountered && (triggerString[i]!= 'E' || triggerString[i] != 'e')) {
edufascin 0:077b18c8febc 141 if (triggerString[i] == ' ') {
edufascin 0:077b18c8febc 142 continue;
edufascin 0:077b18c8febc 143 } else {
edufascin 0:077b18c8febc 144 if (triggerString[i] == '0' || triggerString[i] == '1') {
edufascin 0:077b18c8febc 145 triggerStringBits[countBits] = triggerString[i];
edufascin 0:077b18c8febc 146 bitsEncountered = true;
edufascin 0:077b18c8febc 147 countBits++;
edufascin 0:077b18c8febc 148 }
edufascin 0:077b18c8febc 149 }
edufascin 0:077b18c8febc 150 } else {
edufascin 0:077b18c8febc 151 //If the user enters E character first without enterting the S character then the user has entered and invalid trigger string.
edufascin 0:077b18c8febc 152 if (isStartEncountered && !bitsEncountered && (triggerString[i] == 'E' || triggerString[i] == 'e')) {
edufascin 0:077b18c8febc 153 pc.printf("Please enter a valid Trigger String");
edufascin 0:077b18c8febc 154 } else {
edufascin 0:077b18c8febc 155 if (isStartEncountered && (triggerString[i] == 'E' || triggerString[i] == 'e')) {
edufascin 0:077b18c8febc 156 break;
edufascin 0:077b18c8febc 157 }
edufascin 0:077b18c8febc 158 }
edufascin 0:077b18c8febc 159 }
edufascin 0:077b18c8febc 160 }
edufascin 0:077b18c8febc 161 //Ending the triggerString Bit array.
edufascin 0:077b18c8febc 162 triggerStringBits[countBits] = '\0';
edufascin 0:077b18c8febc 163 pc.printf("\n\nPlease input on sensor:");
edufascin 0:077b18c8febc 164 /* Module -2 Verifying the trigger string with the input from the user */
edufascin 0:077b18c8febc 165 //Getting the touch sensor inputs from the user and verifying it with the host string.
edufascin 0:077b18c8febc 166 count =0;
edufascin 0:077b18c8febc 167 int bufferSeconds = 10;
edufascin 0:077b18c8febc 168 clock_t endwait;
edufascin 0:077b18c8febc 169 clock_t storeendwait;
edufascin 0:077b18c8febc 170 endwait = clock() + bufferSeconds * CLOCKS_PER_SEC ;
edufascin 0:077b18c8febc 171 storeendwait = endwait;
edufascin 0:077b18c8febc 172
edufascin 0:077b18c8febc 173 while (1) {
edufascin 0:077b18c8febc 174 if (touchsense2()) {
edufascin 0:077b18c8febc 175 triggerString2[index2] = '1';
edufascin 0:077b18c8febc 176 myLed2 = 1;
edufascin 0:077b18c8febc 177 wait(0.01);
edufascin 0:077b18c8febc 178 isSensor2Pressed = true;
edufascin 0:077b18c8febc 179 bufferSeconds = 3;
edufascin 0:077b18c8febc 180 //Increasing the endwait time with every touch.
edufascin 0:077b18c8febc 181 endwait = storeendwait + bufferSeconds * CLOCKS_PER_SEC;
edufascin 0:077b18c8febc 182 } else {
edufascin 0:077b18c8febc 183 if (isSensor2Pressed) {
edufascin 0:077b18c8febc 184 realTriggerString[count] = triggerString2[0];
edufascin 0:077b18c8febc 185 count++;
edufascin 0:077b18c8febc 186 }
edufascin 0:077b18c8febc 187 myLed2 = 0;
edufascin 0:077b18c8febc 188 for (i=0;i<strlen(triggerString2);i++) {
edufascin 0:077b18c8febc 189 triggerString2[i] = '\0';
edufascin 0:077b18c8febc 190 }
edufascin 0:077b18c8febc 191 isSensor2Pressed = false;
edufascin 0:077b18c8febc 192 }
edufascin 0:077b18c8febc 193
edufascin 0:077b18c8febc 194 if (touchsense1()) {
edufascin 0:077b18c8febc 195 triggerString1[index1] = '0';
edufascin 0:077b18c8febc 196 myLed1 = 1;
edufascin 0:077b18c8febc 197 wait(0.05);
edufascin 0:077b18c8febc 198 isSensor1Pressed = true;
edufascin 0:077b18c8febc 199 bufferSeconds = 3 ;
edufascin 0:077b18c8febc 200 endwait = storeendwait + bufferSeconds * CLOCKS_PER_SEC;
edufascin 0:077b18c8febc 201 } else {
edufascin 0:077b18c8febc 202 if (isSensor1Pressed) {
edufascin 0:077b18c8febc 203 realTriggerString[count] = triggerString1[0];
edufascin 0:077b18c8febc 204 count++;
edufascin 0:077b18c8febc 205 }
edufascin 0:077b18c8febc 206 myLed1 = 0;
edufascin 0:077b18c8febc 207 for (i=0;i<strlen(triggerString1);i++) {
edufascin 0:077b18c8febc 208 triggerString1[i] = '\0';
edufascin 0:077b18c8febc 209 }
edufascin 0:077b18c8febc 210 isSensor1Pressed = false;
edufascin 0:077b18c8febc 211 }
edufascin 0:077b18c8febc 212 if (clock() > endwait) {
edufascin 0:077b18c8febc 213 break;
edufascin 0:077b18c8febc 214 }
edufascin 0:077b18c8febc 215 }
edufascin 0:077b18c8febc 216 //Marking the end of the trigger string captured through the sensors from the users. This value needs to be matched to the trigger string entered from the user through pc.
edufascin 0:077b18c8febc 217 realTriggerString[count] = '\0';
edufascin 0:077b18c8febc 218 int matchCount = 0;
edufascin 0:077b18c8febc 219 //Only if the trigger string length equals the length of the string entered by the user, then only the validation for each character should take place.
edufascin 0:077b18c8febc 220 if (strlen(realTriggerString) == strlen(triggerStringBits)) {
edufascin 0:077b18c8febc 221 for (i=0;i<strlen(realTriggerString);i++) {
edufascin 0:077b18c8febc 222 if (realTriggerString[i] == triggerStringBits[i]) {
edufascin 0:077b18c8febc 223 matchCount++;
edufascin 0:077b18c8febc 224 }
edufascin 0:077b18c8febc 225 //if (realTriggerString[i]== '0' || realTriggerString[i] == '1')
edufascin 0:077b18c8febc 226 // pc.printf("%c",realTriggerString[i]);
edufascin 0:077b18c8febc 227 }
edufascin 0:077b18c8febc 228 if (matchCount == strlen(realTriggerString)) {
edufascin 0:077b18c8febc 229 pc.printf("HOST MATCH\n");
edufascin 0:077b18c8febc 230 }
edufascin 0:077b18c8febc 231 } else {
edufascin 0:077b18c8febc 232 pc.printf("HOST ERROR or TOUCH ERROR\n");
edufascin 0:077b18c8febc 233 }
edufascin 0:077b18c8febc 234 }
edufascin 0:077b18c8febc 235