main.cpp

00001 #include "mbed.h"
00002 #include "lc.h"
00003 #include "pt-sem.h"
00004 #include "pt.h"
00005 
00006 #define numsamples 1
00007 int touchSense1(void);  //function for the button 1
00008 
00009 DigitalOut myled1(LED1);
00010 AnalogIn input1(p20);
00011 DigitalIn charger1(p19);
00012 DigitalOut ground1(p18);
00013 Serial pc(USBTX, USBRX); // tx, rx
00014 
00015 int touchSense2(void);  //function for the button 2
00016 
00017 DigitalOut myled2(LED4);
00018 AnalogIn input2(p15);
00019 DigitalIn charger2(p16);
00020 DigitalOut ground2(p17);
00021   
00022 char incode[10];
00023 char strcode[10];
00024 char matcode[10];
00025 char temp;
00026 int codelen = 1;
00027 int matlen;
00028 int i=0;
00029 int j=0;
00030 int flag1 = 0;
00031 int flag2 = 0;
00032 int failflag = 0;
00033 
00034 int protothread1_flag, protothread2_flag;
00035 static struct pt pt1, pt2;
00036 
00037 
00038 static int protothread1(struct pt *pt){
00039 
00040     PT_BEGIN(pt);
00041 
00042     while(1) {
00043 
00044         PT_WAIT_UNTIL(pt, protothread2_flag != 0);
00045 
00046         if (pc.readable()){
00047             protothread2_flag = 0;
00048             protothread1_flag = 1;
00049         }
00050 
00051        if (touchSense1()) { 
00052            wait (0.005);    //wait 5ms for checking press
00053             if (touchSense1()){
00054                 myled1 = 1;
00055                 if (flag1 == 0){
00056                     flag1 =1;   //flag1 for symbol press
00057                     pc.printf("1");
00058                     matcode[matlen] = '1'; //record for compare
00059                     matlen ++;
00060                 }
00061             }
00062          
00063        } else {
00064             wait(0.005);  //wait 5ms confirm release
00065             if (touchSense1()==0){
00066                 myled1 = 0;
00067                 flag1 = 0; //clear flag
00068             }
00069         }
00070     
00071         if (touchSense2()) { //samiliar as above 1
00072             wait (0.005);
00073             if (touchSense2()){
00074                 myled2 = 1;
00075                 if (flag2 == 0){
00076                     flag2 =1;
00077                     pc.printf("0");
00078                     matcode[matlen] = '0';
00079                     matlen ++;
00080                 }
00081             }
00082          
00083         } else {
00084             wait(0.005);
00085             if (touchSense2()==0){
00086                 myled2 = 0;
00087                 flag2 = 0;
00088             }
00089         }
00090     
00091         if (flag1 == 1 && flag2 == 1){ //detect press both button
00092             pc.printf("\nError, please don't touch both!!");
00093             //break;
00094         }
00095     
00096         if (matlen >= codelen){ //check input length match the set up
00097             for (i=0;i<codelen;i++){
00098                 if (matcode[i] != strcode[i])
00099                     failflag = 1; //flag for symbol not match
00100             }
00101         
00102             if (failflag == 0){
00103                 pc.printf("\n Congratulations! Code is matched!!\n");
00104                 matlen = 0;
00105             
00106             }
00107         
00108             else{
00109                 pc.printf("\nSorry, the code is wrong, please input again!!\n");
00110                 failflag = 0;
00111                 matlen = 0;
00112             }
00113         
00114        }
00115    }
00116 
00117 
00118 PT_END(pt);
00119 }
00120 
00121 
00122 
00123 static int protothread2(struct pt *pt) {
00124 
00125     PT_BEGIN(pt);
00126     while(1) {
00127 
00128         protothread2_flag = 1;
00129         PT_WAIT_UNTIL(pt, protothread1_flag != 0);
00130 
00131         i=0;
00132         j=0;
00133         pc.printf("\nPlease inpunt the code:\n");
00134         while ((temp = pc.getc())!= 'E') {    //getchar
00135             pc.printf("%c",temp);
00136             incode[i] = temp;    //put the original char in incode      
00137             i++;
00138         }    
00139   
00140         incode[i] = 'E'; //put "E" last as the end symbol
00141         pc.printf("%c",temp);
00142         pc.printf("\nThanks for the string, your input is\n");
00143   
00144         for (i=0;i<10;i++){   //extract 0/1 from incode to strcode
00145             if (incode[i] == 'E')
00146                 break;
00147             else{
00148                 if (incode[i] == '0' || incode[i] == '1'){
00149                     strcode[j] = incode[i];
00150                     j++;
00151                 }
00152             }
00153         
00154         }
00155   
00156         codelen = j;
00157   
00158         for (j=0;j<codelen;j++)   //display the configuration
00159             pc.printf("%c",strcode[j]);
00160         pc.printf("\n");
00161   
00162         matlen = 0;  
00163   
00164         pc.printf("\nPlease input the code:");
00165 
00166         protothread1_flag = 0;
00167 
00168     }
00169 PT_END(pt);
00170 }
00171 
00172 
00173 int main()
00174 {
00175   for (i=0;i<10;i++){   //initial the char array
00176     incode[i] = 'a';    
00177     strcode[i] = 'a';
00178   }
00179     
00180   PT_INIT(&pt1);
00181   PT_INIT(&pt2);
00182 
00183   while(1) {
00184   protothread1(&pt1);
00185   protothread2(&pt2);
00186   }
00187 }
00188 
00189 int touchSense1(void) //function for touch sensor
00190 {
00191     float sample;
00192     ground1 = 0;
00193     charger1.mode(PullUp);
00194     charger1.mode(PullNone);
00195     sample=input1.read();
00196     if (sample < 0.3) {
00197         return 1;
00198     } else {
00199         return 0;
00200     }
00201 }
00202 int touchSense2(void)
00203 {
00204     float sample;
00205     ground2 = 0;
00206     charger2.mode(PullUp);
00207     charger2.mode(PullNone);
00208     sample=input2.read();
00209     if (sample < 0.3) {
00210         return 1;
00211     } else {
00212         return 0;
00213     }
00214 }