Revision 0:077b18c8febc, committed 2010-12-03

Comitter:

edufascin

Date:

Fri Dec 03 06:35:42 2010 +0000

Commit message:

Embedded EE202 HW2

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_single_program.cpp	Fri Dec 03 06:35:42 2010 +0000
@@ -0,0 +1,235 @@
+#include "mbed.h"
+#include "string.h"
+#include "time.h"
+
+#define numsamples 1
+
+int touchsense1(void);
+int touchsense2(void);
+DigitalOut myLed1(LED1);
+DigitalOut myLed2(LED2);
+DigitalOut myLed3(LED3);
+AnalogIn input1(p20);
+DigitalIn charger1(p19);
+DigitalOut ground1(p18);
+AnalogIn input2(p17);
+DigitalIn charger2(p16);
+DigitalOut ground2(p15);
+Serial pc(USBTX,USBRX);
+
+
+
+//This  is called when the T0 capacitor is touched.
+int touchsense1(void) {
+    float sample;
+    ground1 = 0;
+    charger1.mode(PullUp); //p19 used for charging the capacitor.
+    charger1.mode(PullNone);
+    sample = input1.read();
+    if (sample < 0.3) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+//This function is called when the T1 capacitor is touched.
+
+int touchsense2(void) {
+    float sample;
+    ground2 = 0;
+    charger2.mode(PullUp);
+    charger2.mode(PullNone);
+    sample = input2.read();
+    if (sample < 0.4) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+
+
+
+int main() {
+    //Getting the trigger string from the user
+    /* Module-1 */
+    char triggerString1[1];
+    char triggerString2[1];
+    int index1=0,index2 = 0;
+    char realTriggerString[20];
+    //char finalTriggerString[20];
+    int count=0,i = 0;
+    bool isSensor1Pressed = false;
+    bool isSensor2Pressed = false;
+    char inputChar;
+   
+    int triggerStringlength;
+    bool isStartEncountered = false;
+    bool bitsEncountered = false;
+    
+    int countBits = 0;
+    int k = 0;
+    //The user is allowed to enter the trigger string.
+    a:
+    char triggerString[30];char triggerStringBits[20]; count = 0;
+    pc.printf("Enter the Trigger String: "); 
+    
+    while (1) {
+        pc.putc(inputChar = pc.getc());
+        if (inputChar == 'e' || inputChar == 'E') {
+            triggerString[k] = inputChar;
+            k++;
+            break;
+        } else {
+            triggerString[k] = inputChar;
+            k++;
+        }
+    }
+    //All the entered characters from the user are strored in the array.
+    triggerString[k] = '\0';
+    //Getting the total length of the trigger string.
+    while (triggerString[count] != '\0') {
+        count++;
+    }
+    triggerStringlength = count;
+    //Checking for the validity of the input validation string.
+    for (int i = 0 ;i<triggerStringlength; i++) 
+    {
+        if(triggerString[0] != 's' && triggerString[0] != 'S')
+        {
+            pc.printf("\n\nInvalid Trigger String 1\n");
+            for(i=0;i<triggerStringlength;i++)
+            {
+                triggerString[i]='\0';
+            }
+            k=0;
+            goto a;            
+        }   
+        
+         for(int j=1;j<triggerStringlength-2;j++)
+        {
+            if(triggerString[j] == '0' || triggerString[j] == '1' || triggerString[j] == ' ')
+            {
+                continue;
+            }
+            else
+            {
+                pc.printf("\n\nInvalid Trigger String2\n");
+                for(i=0;i<triggerStringlength;i++)
+                {
+                    triggerString[i]='\0';                              
+                }
+                 k=0;
+                 goto a; 
+            }
+        }
+               
+         
+        
+            //If the input string contains spaces, simply continue.
+            if (triggerString[i] == ' ') {
+                continue;
+            }
+
+            if (triggerString[i] == 'S' || triggerString[i] == 's') {
+                isStartEncountered = true;
+                continue;
+            }
+       
+        if (isStartEncountered && (triggerString[i]!= 'E' || triggerString[i] != 'e')) {
+            if (triggerString[i] == ' ') {
+                continue;
+            } else {
+                if (triggerString[i] == '0' || triggerString[i] == '1') {
+                    triggerStringBits[countBits] = triggerString[i];
+                    bitsEncountered = true;
+                    countBits++;
+                }
+            }
+        } else {
+            //If the user enters E character first without enterting the S character then the user has entered and invalid trigger string.
+            if (isStartEncountered && !bitsEncountered && (triggerString[i] == 'E' || triggerString[i] == 'e')) {
+                pc.printf("Please enter a valid Trigger String");
+            } else {
+                if (isStartEncountered && (triggerString[i] == 'E' || triggerString[i] == 'e')) {
+                    break;
+                }
+            }
+        }
+    }
+    //Ending the triggerString Bit array.
+    triggerStringBits[countBits] = '\0';
+    pc.printf("\n\nPlease input on sensor:");
+    /* Module -2 Verifying the trigger string with the input from the user */
+    //Getting the touch sensor inputs from the user and verifying it with the host string.
+    count =0;
+    int bufferSeconds = 10;
+    clock_t endwait;
+    clock_t storeendwait;
+    endwait = clock() + bufferSeconds * CLOCKS_PER_SEC ;
+    storeendwait = endwait;
+    
+    while (1) {
+        if (touchsense2()) {
+            triggerString2[index2] = '1';
+            myLed2 = 1;
+            wait(0.01);
+            isSensor2Pressed = true;
+            bufferSeconds = 3;
+            //Increasing the endwait time with every touch.
+            endwait = storeendwait + bufferSeconds * CLOCKS_PER_SEC;
+        } else {
+            if (isSensor2Pressed) {
+                realTriggerString[count] = triggerString2[0];
+                count++;
+            }
+            myLed2 = 0;
+            for (i=0;i<strlen(triggerString2);i++) {
+                triggerString2[i] = '\0';
+            }
+            isSensor2Pressed = false;
+        }
+
+        if (touchsense1()) {
+            triggerString1[index1] = '0';
+            myLed1 = 1;
+            wait(0.05);
+            isSensor1Pressed = true;
+            bufferSeconds = 3 ;
+            endwait = storeendwait + bufferSeconds * CLOCKS_PER_SEC;
+        } else {
+            if (isSensor1Pressed) {
+                realTriggerString[count] = triggerString1[0];
+                count++;
+            }
+            myLed1 = 0;
+            for (i=0;i<strlen(triggerString1);i++) {
+                triggerString1[i] = '\0';
+            }
+            isSensor1Pressed = false;
+        }
+        if (clock() > endwait) {           
+            break;
+        }
+    }
+    //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.
+    realTriggerString[count] = '\0';
+    int matchCount = 0;
+    //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.
+    if (strlen(realTriggerString) == strlen(triggerStringBits)) {
+        for (i=0;i<strlen(realTriggerString);i++) {
+            if (realTriggerString[i] == triggerStringBits[i]) {
+                matchCount++;
+            }
+            //if (realTriggerString[i]== '0' || realTriggerString[i] == '1')
+            //  pc.printf("%c",realTriggerString[i]);
+        }
+        if (matchCount == strlen(realTriggerString)) {
+            pc.printf("HOST MATCH\n");
+        }
+    } else {
+        pc.printf("HOST ERROR or TOUCH ERROR\n");
+    }
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Dec 03 06:35:42 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e