Gustavo Ramirez / Mbed 2 deprecated gsmrecibe1

este programa acciona un led con un mensaje de texto "Led verde" y apaga con "Lgeverde" el led azul

Dependencies:   mbed

/media/uploads/tony63/pruebatx.png

DebouncedIn.cpp@1:f21dc295f75c, 2017-04-28 (annotated)

Committer:
tony63
Date:
Fri Apr 28 15:46:29 2017 +0000
Revision:
1:f21dc295f75c
Parent:
0:f9ce3b274d95 
versi?n corregida abril 28/2017

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tony63 0:f9ce3b274d95 1 #include "DebouncedIn.h"
tony63 0:f9ce3b274d95 2 #include "mbed.h"
tony63 0:f9ce3b274d95 3
tony63 0:f9ce3b274d95 4 /*
tony63 0:f9ce3b274d95 5 * Constructor
tony63 0:f9ce3b274d95 6 */
tony63 0:f9ce3b274d95 7 DebouncedIn::DebouncedIn(PinName in)
tony63 0:f9ce3b274d95 8 : _in(in) {
tony63 0:f9ce3b274d95 9
tony63 0:f9ce3b274d95 10 // reset all the flags and counters
tony63 0:f9ce3b274d95 11 _samples = 0;
tony63 0:f9ce3b274d95 12 _output = 0;
tony63 0:f9ce3b274d95 13 _output_last = 0;
tony63 0:f9ce3b274d95 14 _rising_flag = 0;
tony63 0:f9ce3b274d95 15 _falling_flag = 0;
tony63 0:f9ce3b274d95 16 _state_counter = 0;
tony63 0:f9ce3b274d95 17
tony63 0:f9ce3b274d95 18 // Attach ticker
tony63 0:f9ce3b274d95 19 _ticker.attach(this, &DebouncedIn::_sample, 0.005);
tony63 0:f9ce3b274d95 20 }
tony63 0:f9ce3b274d95 21
tony63 0:f9ce3b274d95 22 void DebouncedIn::_sample() {
tony63 0:f9ce3b274d95 23
tony63 0:f9ce3b274d95 24 // take a sample
tony63 0:f9ce3b274d95 25 _samples = _samples >> 1; // shift left
tony63 0:f9ce3b274d95 26
tony63 0:f9ce3b274d95 27 if (_in) {
tony63 0:f9ce3b274d95 28 _samples |= 0x80;
tony63 0:f9ce3b274d95 29 }
tony63 0:f9ce3b274d95 30
tony63 0:f9ce3b274d95 31 // examine the sample window, look for steady state
tony63 0:f9ce3b274d95 32 if (_samples == 0x00) {
tony63 0:f9ce3b274d95 33 _output = 0;
tony63 0:f9ce3b274d95 34 }
tony63 0:f9ce3b274d95 35 else if (_samples == 0xFF) {
tony63 0:f9ce3b274d95 36 _output = 1;
tony63 0:f9ce3b274d95 37 }
tony63 0:f9ce3b274d95 38
tony63 0:f9ce3b274d95 39
tony63 0:f9ce3b274d95 40 // Rising edge detection
tony63 0:f9ce3b274d95 41 if ((_output == 1) && (_output_last == 0)) {
tony63 0:f9ce3b274d95 42 _rising_flag++;
tony63 0:f9ce3b274d95 43 _state_counter = 0;
tony63 0:f9ce3b274d95 44 }
tony63 0:f9ce3b274d95 45
tony63 0:f9ce3b274d95 46 // Falling edge detection
tony63 0:f9ce3b274d95 47 else if ((_output == 0) && (_output_last == 1)) {
tony63 0:f9ce3b274d95 48 _falling_flag++;
tony63 0:f9ce3b274d95 49 _state_counter = 0;
tony63 0:f9ce3b274d95 50 }
tony63 0:f9ce3b274d95 51
tony63 0:f9ce3b274d95 52 // steady state
tony63 0:f9ce3b274d95 53 else {
tony63 0:f9ce3b274d95 54 _state_counter++;
tony63 0:f9ce3b274d95 55 }
tony63 0:f9ce3b274d95 56
tony63 0:f9ce3b274d95 57 // update the output
tony63 0:f9ce3b274d95 58 _output_last = _output;
tony63 0:f9ce3b274d95 59
tony63 0:f9ce3b274d95 60 }
tony63 0:f9ce3b274d95 61
tony63 0:f9ce3b274d95 62
tony63 0:f9ce3b274d95 63
tony63 0:f9ce3b274d95 64 // return number of rising edges
tony63 0:f9ce3b274d95 65 int DebouncedIn::rising(void) {
tony63 0:f9ce3b274d95 66 int return_value = _rising_flag;
tony63 0:f9ce3b274d95 67 _rising_flag = 0;
tony63 0:f9ce3b274d95 68 return(return_value);
tony63 0:f9ce3b274d95 69 }
tony63 0:f9ce3b274d95 70
tony63 0:f9ce3b274d95 71 // return number of falling edges
tony63 0:f9ce3b274d95 72 int DebouncedIn::falling(void) {
tony63 0:f9ce3b274d95 73 int return_value = _falling_flag;
tony63 0:f9ce3b274d95 74 _falling_flag = 0;
tony63 0:f9ce3b274d95 75 return(return_value);
tony63 0:f9ce3b274d95 76 }
tony63 0:f9ce3b274d95 77
tony63 0:f9ce3b274d95 78 // return number of ticsk we've bene steady for
tony63 0:f9ce3b274d95 79 int DebouncedIn::steady(void) {
tony63 0:f9ce3b274d95 80 return(_state_counter);
tony63 0:f9ce3b274d95 81 }
tony63 0:f9ce3b274d95 82
tony63 0:f9ce3b274d95 83 // return the debounced status
tony63 0:f9ce3b274d95 84 int DebouncedIn::read(void) {
tony63 0:f9ce3b274d95 85 return(_output);
tony63 0:f9ce3b274d95 86 }
tony63 0:f9ce3b274d95 87
tony63 0:f9ce3b274d95 88 // shorthand for read()
tony63 0:f9ce3b274d95 89 DebouncedIn::operator int() {
tony63 0:f9ce3b274d95 90 return read();
tony63 0:f9ce3b274d95 91 }
tony63 0:f9ce3b274d95 92
tony63 0:f9ce3b274d95 93