main.cpp

00001 #include "mbed.h"
00002 #include "PinDetect.h"
00003 // Initialize a pins to perform analog input and digital output fucntions
00004 AnalogIn   ain(A0);
00005 DigitalOut dout(D3);
00006 PinDetect  pin(D2);
00007 char letter;
00008 char *lower_arr = " zyxwvutsrqponmlkjihgfedcba";
00009 char *upper_arr = " ZYXWVUTSRQPONMLKJIHGFEDCBA";
00010 char *arr = lower_arr;
00011 void enter(void)
00012 {
00013     printf("%c", letter);
00014 }
00015 
00016 void capslock_on(void) {
00017     dout = !dout;
00018 }
00019 
00020 int main(void)
00021 {    
00022     dout = 0;
00023     pin.setSampleFrequency();
00024     pin.attach_asserted(&enter);
00025     pin.attach_deasserted_held(&capslock_on);
00026     printf("\r\n Input here: \r\n ");    
00027     while (1) {
00028         if (dout){
00029             arr = upper_arr;
00030         } else {
00031             arr = lower_arr;
00032         }
00033         int input = (int)(ain.read()* 100.0f / 3.705f);
00034         letter = arr[input];
00035         printf("%c", letter);
00036         printf("\b");
00037     }
00038 }