ble.h

00001 //state used to remember previous characters read in a button message
00002 //global variables for main and interrupt routine
00003 #include "mbed.h"
00004 volatile bool button_ready = 0;
00005 volatile int  bnum = 0;
00006 volatile int  bhit  ;
00007 Serial Blue(p28,p27);
00008 enum statetype {start = 0, got_exclm, got_B, got_num, got_hit};
00009 statetype state = start;
00010 void parse_message()
00011 {
00012     switch (state) {
00013         case start:
00014             if (Blue.getc()=='!') state = got_exclm;
00015             else state = start;
00016             break;
00017         case got_exclm:
00018             if (Blue.getc() == 'B') state = got_B;
00019             else state = start;
00020             break;
00021         case got_B:
00022             bnum = Blue.getc();
00023             state = got_num;
00024             break;
00025         case got_num:
00026             bhit = Blue.getc();
00027             state = got_hit;
00028             break;
00029         case got_hit:
00030             if (Blue.getc() == char(~('!' + ' B' + bnum + bhit))) button_ready = 1;
00031             state = start;
00032             break;
00033         default:
00034             Blue.getc();
00035             state = start;
00036     }
00037 }