Alix Germany / Mbed OS Coursework_Version_8

Version 8, working version with Alix, sams and ollies code. Displays time, date and sensor info onto terminal, LCD and networking, and saves onto SD card.

Dependencies:   BMP280 ELEC350-Practicals-FZ429 TextLCD BME280 ntp-client

SWPoll.hpp@12:4c7eaac8ceef, 2018-12-31 (annotated)

Committer:
Alix955
Date:
Mon Dec 31 19:20:22 2018 +0000
Revision:
12:4c7eaac8ceef
Parent:
0:f9a18207d99c 
Version 8, integration of Alix & Sams work with older(?) version of ollies. Displays time, date and all sensor information onto LCD, Terminal and Networking, and saves sensor info to SD card.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
O_Thom 0:f9a18207d99c 1 #include "mbed.h"
O_Thom 0:f9a18207d99c 2 class SWPoll {
O_Thom 0:f9a18207d99c 3 private:
O_Thom 0:f9a18207d99c 4 enum State {LOW, LOW_DEBOUNCE, HIGH, HIGH_DEBOUNCE};
O_Thom 0:f9a18207d99c 5 State state; // Internal state
O_Thom 0:f9a18207d99c 6 DigitalIn& sw; // These are references (aliases) and MUST be initialised
O_Thom 0:f9a18207d99c 7 int status; // ""
O_Thom 0:f9a18207d99c 8 Timer t; // Each instance has it's own timer, so this is is finite
O_Thom 0:f9a18207d99c 9
O_Thom 0:f9a18207d99c 10 public:
O_Thom 0:f9a18207d99c 11 //Constructor - MUST be given two parameters (for the switch and led) BY REFERENCE
O_Thom 0:f9a18207d99c 12 SWPoll(DigitalIn& gpioIn, int flag) : sw(gpioIn), status(flag) {
O_Thom 0:f9a18207d99c 13 state = LOW;
O_Thom 0:f9a18207d99c 14 t.reset();
O_Thom 0:f9a18207d99c 15 flag = 0;
O_Thom 0:f9a18207d99c 16 }
O_Thom 0:f9a18207d99c 17 //Destructor - should the instance go out of scope, this is called
O_Thom 0:f9a18207d99c 18 ~SWPoll() {
O_Thom 0:f9a18207d99c 19 //Shut down
O_Thom 0:f9a18207d99c 20 t.stop();
O_Thom 0:f9a18207d99c 21 t.reset();
O_Thom 0:f9a18207d99c 22 flag = 0;
O_Thom 0:f9a18207d99c 23 }
O_Thom 0:f9a18207d99c 24 //The public API - poll the switches
O_Thom 0:f9a18207d99c 25 //Bascially, a mealy machine - uses a timer to manage switch bounce
O_Thom 0:f9a18207d99c 26 void poll() {
O_Thom 0:f9a18207d99c 27 switch (state)
O_Thom 0:f9a18207d99c 28 {
O_Thom 0:f9a18207d99c 29 //Waiting for switch to rise:
O_Thom 0:f9a18207d99c 30 case LOW:
O_Thom 0:f9a18207d99c 31 if (sw == 1) {
O_Thom 0:f9a18207d99c 32 state = LOW_DEBOUNCE;
O_Thom 0:f9a18207d99c 33 t.reset();
O_Thom 0:f9a18207d99c 34 t.start();
O_Thom 0:f9a18207d99c 35 }
O_Thom 0:f9a18207d99c 36 break;
O_Thom 0:f9a18207d99c 37
O_Thom 0:f9a18207d99c 38 case LOW_DEBOUNCE:
O_Thom 0:f9a18207d99c 39 if (t.read_ms() >= 200) {
O_Thom 0:f9a18207d99c 40 state = HIGH;
O_Thom 0:f9a18207d99c 41 t.stop();
O_Thom 0:f9a18207d99c 42 t.reset();
O_Thom 0:f9a18207d99c 43 }
O_Thom 0:f9a18207d99c 44 break;
O_Thom 0:f9a18207d99c 45
O_Thom 0:f9a18207d99c 46 case HIGH:
O_Thom 0:f9a18207d99c 47 if (sw == 0) {
O_Thom 0:f9a18207d99c 48 flag = !flag; //Toggle output on state transition
O_Thom 0:f9a18207d99c 49 state = HIGH_DEBOUNCE;
O_Thom 0:f9a18207d99c 50 t.reset(); //(purely defensive)
O_Thom 0:f9a18207d99c 51 t.start();
O_Thom 0:f9a18207d99c 52 }
O_Thom 0:f9a18207d99c 53 break;
O_Thom 0:f9a18207d99c 54 case HIGH_DEBOUNCE:
O_Thom 0:f9a18207d99c 55 if (t.read_ms() >= 200) {
O_Thom 0:f9a18207d99c 56 state = LOW;
O_Thom 0:f9a18207d99c 57 t.stop();
O_Thom 0:f9a18207d99c 58 t.reset();
O_Thom 0:f9a18207d99c 59 }
O_Thom 0:f9a18207d99c 60 break;
O_Thom 0:f9a18207d99c 61 default:
O_Thom 0:f9a18207d99c 62 t.stop();
O_Thom 0:f9a18207d99c 63 t.reset();
O_Thom 0:f9a18207d99c 64 state = LOW;
O_Thom 0:f9a18207d99c 65 break;
O_Thom 0:f9a18207d99c 66 } //end switch
O_Thom 0:f9a18207d99c 67
O_Thom 0:f9a18207d99c 68 //This is a Mealy Machine - so no output logic follows
O_Thom 0:f9a18207d99c 69 }
O_Thom 0:f9a18207d99c 70 };