hima bindu pallanti / Mbed 2 deprecated mbed_key

4*4 keypad interfacing with arm lpc1768 for entering 0-9 digits.

Dependencies:   keypad mbed

main.cpp@0:5e96fed89c06, 2015-10-10 (annotated)

Committer:
himabindupallanti
Date:
Sat Oct 10 10:35:00 2015 +0000
Revision:
0:5e96fed89c06
Keypad interfacing for password

Who changed what in which revision?

UserRevisionLine numberNew contents of line
himabindupallanti 0:5e96fed89c06 1 #include "mbed.h"
himabindupallanti 0:5e96fed89c06 2
himabindupallanti 0:5e96fed89c06 3 #include "Keypad.h"
himabindupallanti 0:5e96fed89c06 4
himabindupallanti 0:5e96fed89c06 5 Serial PC(USBTX, USBRX);
himabindupallanti 0:5e96fed89c06 6
himabindupallanti 0:5e96fed89c06 7 // Define your own keypad values
himabindupallanti 0:5e96fed89c06 8 char Keytable[] = { '1', '2', '3', // r0
himabindupallanti 0:5e96fed89c06 9 '4', '5', '6', // r1
himabindupallanti 0:5e96fed89c06 10 '7', '8', '9',
himabindupallanti 0:5e96fed89c06 11 '0' // r2
himabindupallanti 0:5e96fed89c06 12 // c0 c1 c2
himabindupallanti 0:5e96fed89c06 13 };
himabindupallanti 0:5e96fed89c06 14
himabindupallanti 0:5e96fed89c06 15 int32_t Index = -1;
himabindupallanti 0:5e96fed89c06 16 int State;
himabindupallanti 0:5e96fed89c06 17
himabindupallanti 0:5e96fed89c06 18 uint32_t cbAfterInput(uint32_t index)
himabindupallanti 0:5e96fed89c06 19 {
himabindupallanti 0:5e96fed89c06 20 Index = index;
himabindupallanti 0:5e96fed89c06 21 return 0;
himabindupallanti 0:5e96fed89c06 22 }
himabindupallanti 0:5e96fed89c06 23
himabindupallanti 0:5e96fed89c06 24 int main()
himabindupallanti 0:5e96fed89c06 25 {
himabindupallanti 0:5e96fed89c06 26 PC.printf("I am Demo Keypad\r\n");
himabindupallanti 0:5e96fed89c06 27
himabindupallanti 0:5e96fed89c06 28 // r0 r1 r2 r3 c0 c1 c2 c3
himabindupallanti 0:5e96fed89c06 29 Keypad keypad(p21, p22, p23, p24, p25, p26, p27, p28);
himabindupallanti 0:5e96fed89c06 30 keypad.attach(&cbAfterInput);
himabindupallanti 0:5e96fed89c06 31 keypad.start(); // energize the columns c0-c3 of the keypad
himabindupallanti 0:5e96fed89c06 32
himabindupallanti 0:5e96fed89c06 33 while (1) {
himabindupallanti 0:5e96fed89c06 34 __wfi();
himabindupallanti 0:5e96fed89c06 35 if (Index > -1) {
himabindupallanti 0:5e96fed89c06 36 PC.printf("Interrupted");
himabindupallanti 0:5e96fed89c06 37 PC.printf("Index:%d => Key:%c\r\n", Index, Keytable[Index]);
himabindupallanti 0:5e96fed89c06 38 Index = -1;
himabindupallanti 0:5e96fed89c06 39 }
himabindupallanti 0:5e96fed89c06 40 }
himabindupallanti 0:5e96fed89c06 41 }