Diff: main.cpp

Revision:

0:a484f149592d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 30 22:01:32 2010 +0000
@@ -0,0 +1,162 @@
+#include "mbed.h"
+
+#define ERROR -1
+int touchSense1(void);
+int touchSense2(void);
+int getTouch(void);
+void hostError(void);
+void touchError(void);
+void runFunction(void);
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED3);
+
+AnalogIn input1(p20);
+AnalogIn input2(p15);
+
+DigitalIn charger1(p19);
+DigitalIn charger2(p16);
+
+DigitalOut ground1(p18);
+DigitalOut ground2(p17);
+Serial pc(USBTX, USBRX); // tx, rx
+
+int gInd = 0;
+int main() {
+    pc.attach(runFunction);
+    while(1) {
+        if(gInd == 1)
+        {
+            pc.printf(" Reached back the main fun\n");
+            gInd =0;
+         }
+        wait(0.2);
+    }
+}
+
+void runFunction() {
+    char A[1024],c='k';
+    int len, i, t_bit, h_bit;
+    gInd = 1;
+    int err_set ;
+   pc.printf(" Entering the reading loop\n");
+       // if (pc.readable()) {
+           i = 0;
+            err_set = 0;
+            while(c!='S' && pc.readable())
+                c = pc.getc();
+                
+            while( (c != 'E') && pc.readable())
+            {
+                if(c != ' ')
+                {
+                    //if((c == '0') || (c=='1'))
+                        A[i++] = c;
+                        if((i>1) && (c!='0') &&(c!='1'))
+                        {
+                            err_set = 1;
+                            hostError();
+                            while(pc.readable()) //buffer out rest and return
+                                c=pc.getc();
+                            return;
+                        }
+                    
+                }
+             //   pc.printf("READING %c \n",c);
+                c = pc.getc();
+            }
+            A[i] = c;
+            A[i+1]='\0';
+            while(pc.readable()) //buffer out rest.
+                c=pc.getc();
+           
+             
+            //pc.printf("DATA RECV : %s\n",A);
+            len = strlen(A)-1; //to make it right offset
+            if ((A[0]!='S') || (A[len] != 'E')) {
+                hostError();
+                return;
+            }
+            i = 1;
+            while (i<len) {
+                t_bit = getTouch();
+                //pc.printf("\n MY TOKEN IS %c and touch is %d\n",A[i],t_bit);
+                if (A[i] == '0')
+                    h_bit = 0;
+                else if (A[i] == '1')
+                    h_bit = 1;
+             
+                if (t_bit != h_bit) {
+                    touchError();
+                    return;
+                }
+                i++;
+            }
+            pc.printf("MATCH\n");
+        //}
+        return;
+}
+
+int getTouch(void) {
+    int sens;
+    while (1) {
+
+        sens = 0;
+        if (touchSense1()) {
+            wait_ms(5);
+         while(touchSense1())
+            {
+            //    pc.printf("In touchsense1\n");
+                sens = 1;
+                wait_ms(100);
+            }
+            if(sens)
+                return 0;   
+        }
+
+        if (touchSense2()) {
+            wait_ms(5);
+            while(touchSense2())
+            {
+          //      pc.printf("In touchsense2\n");
+                sens = 1;
+                wait_ms(100);
+             }
+             if(sens)
+                return 1;
+        }     
+    }
+}
+
+int touchSense1(void) {
+    float sample;
+    ground1 = 0;
+    charger1.mode(PullUp);
+    charger1.mode(PullNone);
+    sample=input1.read();
+    if (sample < 0.3) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+int touchSense2(void) {
+    float sample;
+    ground2 = 0;
+    charger2.mode(PullUp);
+    charger2.mode(PullNone);
+    sample=input2.read();
+    if (sample < 0.3) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+void hostError() {
+    pc.printf("HOST ERROR");
+}
+void touchError() {
+    pc.printf("TOUCH ERROR");
+}
\ No newline at end of file