main.cpp

00001 #include "mbed.h"
00002 
00003 #define numsamples 1
00004 int touchSense1(void);  //function for the button 1
00005 
00006 DigitalOut myled1(LED1);
00007 AnalogIn input1(p20);
00008 DigitalIn charger1(p19);
00009 DigitalOut ground1(p18);
00010 Serial pc(USBTX, USBRX); // tx, rx
00011 
00012 int touchSense2(void);  //function for the button 2
00013 
00014 DigitalOut myled2(LED4);
00015 AnalogIn input2(p15);
00016 DigitalIn charger2(p16);
00017 DigitalOut ground2(p17);
00018 
00019 int getc();
00020 void setcode();
00021      
00022 
00023 char incode[10];
00024 char strcode[10];
00025 char matcode[10];
00026 char temp;
00027 int codelen = 1;
00028 int matlen;
00029 int i=0;
00030 int j=0;
00031 int flag1 = 0;
00032 int flag2 = 0;
00033 int failflag = 0;
00034 
00035 int main() {
00036 
00037   for (i=0;i<10;i++){   //initial the char array
00038     incode[i] = 'a';    
00039     strcode[i] = 'a';
00040   }
00041 
00042   pc.attach(&setcode, Serial::RxIrq);
00043 
00044   while(1) {
00045     
00046     
00047    if (touchSense1()) { 
00048        wait (0.005);    //wait 5ms for checking press
00049        if (touchSense1()){
00050             myled1 = 1;
00051             if (flag1 == 0){
00052                 flag1 =1;   //flag1 for symbol press
00053                 pc.printf("1");
00054                 matcode[matlen] = '1'; //record for compare
00055                 matlen ++;
00056              }
00057         }
00058          
00059     } else {
00060         wait(0.005);  //wait 5ms confirm release
00061         if (touchSense1()==0){
00062             myled1 = 0;
00063             flag1 = 0; //clear flag
00064         }
00065     }
00066     
00067  
00068     if (touchSense2()) { //samiliar as above 1
00069        wait (0.005);
00070        if (touchSense2()){
00071             myled2 = 1;
00072             if (flag2 == 0){
00073                 flag2 =1;
00074                 pc.printf("0");
00075                 matcode[matlen] = '0';
00076                 matlen ++;
00077              }
00078         }
00079          
00080     } else {
00081         wait(0.005);
00082         if (touchSense2()==0){
00083             myled2 = 0;
00084             flag2 = 0;
00085         }
00086     }
00087     
00088     if (flag1 == 1 && flag2 == 1){ //detect press both button
00089         pc.printf("\nError, please don't touch both!!");
00090         //break;
00091     }
00092     
00093     if (matlen >= codelen){ //check input length match the set up
00094         for (i=0;i<codelen;i++){
00095             if (matcode[i] != strcode[i])
00096                 failflag = 1; //flag for symbol not match
00097         }
00098         
00099         if (failflag == 0){
00100             pc.printf("\n Congratulations! Code is matched!!\n");
00101             matlen = 0;
00102             
00103         }
00104         
00105         else{
00106             pc.printf("\nSorry, the code is wrong, please input again!!\n");
00107             failflag = 0;
00108             matlen = 0;
00109         }
00110         
00111     }
00112     
00113    
00114   }
00115 }
00116 
00117 int touchSense1(void) //function for touch sensor
00118 {
00119     float sample;
00120     ground1 = 0;
00121     charger1.mode(PullUp);
00122     charger1.mode(PullNone);
00123     sample=input1.read();
00124     if (sample < 0.3) {
00125         return 1;
00126     } else {
00127         return 0;
00128     }
00129 }
00130 int touchSense2(void)
00131 {
00132     float sample;
00133     ground2 = 0;
00134     charger2.mode(PullUp);
00135     charger2.mode(PullNone);
00136     sample=input2.read();
00137     if (sample < 0.3) {
00138         return 1;
00139     } else {
00140         return 0;
00141     }
00142 }
00143 
00144 void setcode(){
00145   i=0;
00146   j=0;
00147   pc.printf("\nPlease inpunt the code:\n");
00148   while ((temp = pc.getc())!= 'E') {    //getchar
00149     pc.printf("%c",temp);
00150     incode[i] = temp;    //put the original char in incode      
00151     i++;
00152   }    
00153   
00154   incode[i] = 'E'; //put "E" last as the end symbol
00155   pc.printf("%c",temp);
00156   pc.printf("\nThanks for the string, your input is\n");
00157   
00158   for (i=0;i<10;i++){   //extract 0/1 from incode to strcode
00159     if (incode[i] == 'E')
00160         break;
00161     else{
00162         if (incode[i] == '0' || incode[i] == '1'){
00163             strcode[j] = incode[i];
00164             j++;
00165         }
00166     }
00167         
00168   }
00169   
00170   codelen = j;
00171   
00172   for (j=0;j<codelen;j++)   //display the configuration
00173     pc.printf("%c",strcode[j]);
00174   pc.printf("\n");
00175   
00176   matlen = 0;  
00177   
00178   pc.printf("\nPlease input the code:");
00179 }