Diff: main.cpp

Revision:

0:f6d212e09078

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Dec 01 05:29:04 2010 +0000
@@ -0,0 +1,132 @@
+ #include "mbed.h"
+ 
+ #define numsamples 1
+ int touchSense1(void);
+ int touchSense2(void);
+ void readSerial();
+ char touchDetect ();
+
+ 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); // tx, rx
+ 
+ char *serial = new char [100];
+
+ int main() {
+ 
+    pc.attach (&readSerial);             //Foreground: read the serial
+    
+ 
+   while (1){                            //Background: compare the serial value and user input.
+    int i=1,j=0;
+    while (serial[j]!='E') {             //Print the host value;
+    pc.printf ("%c", serial[j]);
+    j++;
+    } 
+    pc.printf ("E");
+
+   while (1) {
+        pc.printf (" The next input should be :");  //Hint
+        pc.printf ("%c", serial[i]);
+        if (serial[i]=='E'){
+            pc.printf (" MATCH ");
+            pc.printf ("\r\n");
+            i=1;
+            break;  
+        }     
+        else if (serial[i]==touchDetect()){                        
+           i++;
+           wait (0.5);
+        }   
+        else{ 
+            pc.printf (" TOUCH ERROR ");
+            pc.printf ("\r\n");               //If the user touch both sensor, the retun value is 3, which will lead to touch error.
+            break;}                         //Also, if the user mistouch the sensor, it's also a touch error.
+    }  
+    }      
+ }
+ 
+ void readSerial()
+ {
+    char b;
+    int flag=1,i=0;
+    b=pc.getc();
+    pc.printf("%c",b);
+    if (b=='S'){
+        serial[0]='S';
+        i++;
+        while (flag){
+            serial[i]=pc.getc();  
+            pc.printf ("%c",serial[i]);       
+            if (serial[i]=='E'){
+                flag=0;} 
+            else if (serial[i]=='S'){
+                pc.printf (" HOST ERROR \r\n ");    //Host sent two S before E. Host error.
+                break;} 
+            i++;     
+        }           
+    }
+}
+ 
+char touchDetect ()        //Detect the user input
+ {
+    while (1) {
+    if (touchSense1()){
+           pc.printf (" T1 ");      //T1 means sensor1 is pressed
+           if (touchSense2()){
+               return '3';
+           }
+            while (touchSense1()){
+                wait(0.5);}
+           return '1';
+    }
+    else if (touchSense2()){
+           pc.printf (" T0 ");
+           if (touchSense1()){
+                return '3';
+           }
+             while (touchSense2()){
+                wait(0.5);}
+           return '0';
+           
+    }    
+    wait (0.05); 
+    }
+  }
+  
+ 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;
+    }
+ }
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