main.cpp

00001 #include "mbed.h"
00002 #include "Keypad.h"
00003 #include "TextLCD.h"
00004 #include <string>
00005 
00006 #define PW_SIZE 5
00007 #define PASSWORD "1234A"
00008 
00009 Serial pc(USBTX, USBRX);
00010 
00011 //initialize LCD display
00012 TextLCD lcd(p5, p7, p6, p11, p12, p13, p14, TextLCD::LCD16x2); // rs, rw, e, d0-d3
00013 
00014 // Define keypad values
00015 char Keytable[] = { '1', '2', '3', 'A',   // r0
00016                     '4', '5', '6', 'B',   // r1
00017                     '7', '8', '9', 'C',   // r2
00018                     '*', '0', '#', 'D'    // r3
00019                   };
00020                  // c0   c1   c2   c3
00021 
00022 //Initialize variables
00023 uint32_t Index;
00024 std::string  pword;
00025 const char * parray;
00026 int psize=0;
00027 
00028 uint32_t cbAfterInput(uint32_t index) {
00029     Index = index;
00030     
00031     //print entered value on LCD and save password in string
00032     if(Keytable[Index] != '#' && Keytable[Index] != '*'){
00033         if(psize < PW_SIZE){
00034             pword.push_back(Keytable[Index]);
00035             lcd.putc(Keytable[Index]);
00036             parray = pword.c_str();
00037             psize++;
00038         }
00039     }
00040     
00041     if(Keytable[Index] == '*'){
00042         pword = "";
00043         lcd.cls();
00044         wait(0.001);
00045         lcd.printf("Pass:");
00046         lcd.locate(0,1);
00047         psize=0;
00048     }
00049     if(Keytable[Index] == '#'){
00050         lcd.cls();
00051         wait(0.001);
00052         if(pword == PASSWORD)
00053             lcd.printf("Correct");
00054         //lcd.printf("pword");
00055         //lcd.locate(0,1);
00056         //lcd.printf(parray);
00057         else
00058             lcd.printf("Incorrect");
00059     }
00060     return 0;
00061 }
00062 
00063     
00064 int main() {
00065     
00066     lcd.cls();
00067     wait(0.001);
00068     lcd.printf("Pass:");
00069     lcd.locate(0,1);
00070      
00071                 // r0   r1   r2   r3   c0   c1   c2   c3
00072     Keypad keypad(p28, p27, p26, p25, p21, p22, p23, p24);
00073     keypad.attach(&cbAfterInput);
00074     keypad.start();  // energize the keypad via c0-c3
00075 
00076     while (1) {
00077         __wfi();
00078         pc.printf("Interrupted\r\n");
00079         pc.printf("Index:%d => Key:%c\r\n", Index, Keytable[Index]);        
00080     }
00081 }