Fabio Andres Ibañez Diaz / Mbed 2 deprecated FUNCIONACORONRDY

GPS NUEVO

Dependencies:   GPS7 mbed

DebouncedIn.cpp@0:b11acb885c4c, 2015-06-19 (annotated)

Committer:
obifandres
Date:
Fri Jun 19 10:44:48 2015 +0000
Revision:
0:b11acb885c4c
GPS NUEVO

Who changed what in which revision?

UserRevisionLine numberNew contents of line
obifandres 0:b11acb885c4c 1 #include "DebouncedIn.h"
obifandres 0:b11acb885c4c 2 #include "mbed.h"
obifandres 0:b11acb885c4c 3
obifandres 0:b11acb885c4c 4 /*
obifandres 0:b11acb885c4c 5 * Constructor
obifandres 0:b11acb885c4c 6 */
obifandres 0:b11acb885c4c 7 DebouncedIn::DebouncedIn(PinName in)
obifandres 0:b11acb885c4c 8 : _in(in) {
obifandres 0:b11acb885c4c 9
obifandres 0:b11acb885c4c 10 // reset all the flags and counters
obifandres 0:b11acb885c4c 11 _samples = 0;
obifandres 0:b11acb885c4c 12 _output = 0;
obifandres 0:b11acb885c4c 13 _output_last = 0;
obifandres 0:b11acb885c4c 14 _rising_flag = 0;
obifandres 0:b11acb885c4c 15 _falling_flag = 0;
obifandres 0:b11acb885c4c 16 _state_counter = 0;
obifandres 0:b11acb885c4c 17
obifandres 0:b11acb885c4c 18 // Attach ticker
obifandres 0:b11acb885c4c 19 _ticker.attach(this, &DebouncedIn::_sample, 0.005);
obifandres 0:b11acb885c4c 20 }
obifandres 0:b11acb885c4c 21
obifandres 0:b11acb885c4c 22 void DebouncedIn::_sample() {
obifandres 0:b11acb885c4c 23
obifandres 0:b11acb885c4c 24 // take a sample
obifandres 0:b11acb885c4c 25 _samples = _samples >> 1; // shift left
obifandres 0:b11acb885c4c 26
obifandres 0:b11acb885c4c 27 if (_in) {
obifandres 0:b11acb885c4c 28 _samples |= 0x80;
obifandres 0:b11acb885c4c 29 }
obifandres 0:b11acb885c4c 30
obifandres 0:b11acb885c4c 31 // examine the sample window, look for steady state
obifandres 0:b11acb885c4c 32 if (_samples == 0x00) {
obifandres 0:b11acb885c4c 33 _output = 0;
obifandres 0:b11acb885c4c 34 }
obifandres 0:b11acb885c4c 35 else if (_samples == 0xFF) {
obifandres 0:b11acb885c4c 36 _output = 1;
obifandres 0:b11acb885c4c 37 }
obifandres 0:b11acb885c4c 38
obifandres 0:b11acb885c4c 39
obifandres 0:b11acb885c4c 40 // Rising edge detection
obifandres 0:b11acb885c4c 41 if ((_output == 1) && (_output_last == 0)) {
obifandres 0:b11acb885c4c 42 _rising_flag++;
obifandres 0:b11acb885c4c 43 _state_counter = 0;
obifandres 0:b11acb885c4c 44 }
obifandres 0:b11acb885c4c 45
obifandres 0:b11acb885c4c 46 // Falling edge detection
obifandres 0:b11acb885c4c 47 else if ((_output == 0) && (_output_last == 1)) {
obifandres 0:b11acb885c4c 48 _falling_flag++;
obifandres 0:b11acb885c4c 49 _state_counter = 0;
obifandres 0:b11acb885c4c 50 }
obifandres 0:b11acb885c4c 51
obifandres 0:b11acb885c4c 52 // steady state
obifandres 0:b11acb885c4c 53 else {
obifandres 0:b11acb885c4c 54 _state_counter++;
obifandres 0:b11acb885c4c 55 }
obifandres 0:b11acb885c4c 56
obifandres 0:b11acb885c4c 57 // update the output
obifandres 0:b11acb885c4c 58 _output_last = _output;
obifandres 0:b11acb885c4c 59
obifandres 0:b11acb885c4c 60 }
obifandres 0:b11acb885c4c 61
obifandres 0:b11acb885c4c 62
obifandres 0:b11acb885c4c 63
obifandres 0:b11acb885c4c 64 // return number of rising edges
obifandres 0:b11acb885c4c 65 int DebouncedIn::rising(void) {
obifandres 0:b11acb885c4c 66 int return_value = _rising_flag;
obifandres 0:b11acb885c4c 67 _rising_flag = 0;
obifandres 0:b11acb885c4c 68 return(return_value);
obifandres 0:b11acb885c4c 69 }
obifandres 0:b11acb885c4c 70
obifandres 0:b11acb885c4c 71 // return number of falling edges
obifandres 0:b11acb885c4c 72 int DebouncedIn::falling(void) {
obifandres 0:b11acb885c4c 73 int return_value = _falling_flag;
obifandres 0:b11acb885c4c 74 _falling_flag = 0;
obifandres 0:b11acb885c4c 75 return(return_value);
obifandres 0:b11acb885c4c 76 }
obifandres 0:b11acb885c4c 77
obifandres 0:b11acb885c4c 78 // return number of ticsk we've bene steady for
obifandres 0:b11acb885c4c 79 int DebouncedIn::steady(void) {
obifandres 0:b11acb885c4c 80 return(_state_counter);
obifandres 0:b11acb885c4c 81 }
obifandres 0:b11acb885c4c 82
obifandres 0:b11acb885c4c 83 // return the debounced status
obifandres 0:b11acb885c4c 84 int DebouncedIn::read(void) {
obifandres 0:b11acb885c4c 85 return(_output);
obifandres 0:b11acb885c4c 86 }
obifandres 0:b11acb885c4c 87
obifandres 0:b11acb885c4c 88 // shorthand for read()
obifandres 0:b11acb885c4c 89 DebouncedIn::operator int() {
obifandres 0:b11acb885c4c 90 return read();
obifandres 0:b11acb885c4c 91 }
obifandres 0:b11acb885c4c 92
obifandres 0:b11acb885c4c 93