Oliver Thompson / Mbed OS ELEC351-Coursework

Repo. for the ELEC351 Coursework - Oliver Thompson

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

SwitchManager.hpp@13:37a7c57f4641, 2018-12-05 (annotated)

Committer:
O_Thom
Date:
Wed Dec 05 19:53:40 2018 +0000
Revision:
13:37a7c57f4641
Minor changes to Serial Comms header. Testing still needed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
O_Thom 13:37a7c57f4641 1 #include "mbed.h"
O_Thom 13:37a7c57f4641 2
O_Thom 13:37a7c57f4641 3 //This class manages an Interrupt in and LED output
O_Thom 13:37a7c57f4641 4 //It automatically manages the switch-debounce using edge detection and timers
O_Thom 13:37a7c57f4641 5 class SwitchManager {
O_Thom 13:37a7c57f4641 6 private:
O_Thom 13:37a7c57f4641 7 // enum State {LOW, LOW_DEBOUNCE, HIGH, HIGH_DEBOUNCE};
O_Thom 13:37a7c57f4641 8 InterruptIn& switchInterrupt;
O_Thom 13:37a7c57f4641 9 DigitalOut& led;
O_Thom 13:37a7c57f4641 10 Timeout t;
O_Thom 13:37a7c57f4641 11
O_Thom 13:37a7c57f4641 12 void waitForRising() {
O_Thom 13:37a7c57f4641 13 //Turn off interrupt
O_Thom 13:37a7c57f4641 14 switchInterrupt.rise(NULL);
O_Thom 13:37a7c57f4641 15 //Turn on timer
O_Thom 13:37a7c57f4641 16 t.attach(callback(this, &SwitchManager::waitForStabilityRising), 0.2);
O_Thom 13:37a7c57f4641 17 }
O_Thom 13:37a7c57f4641 18
O_Thom 13:37a7c57f4641 19 void waitForStabilityRising() {
O_Thom 13:37a7c57f4641 20 //Look for falling edge
O_Thom 13:37a7c57f4641 21 switchInterrupt.fall(callback(this, &SwitchManager::waitForFalling));
O_Thom 13:37a7c57f4641 22 }
O_Thom 13:37a7c57f4641 23
O_Thom 13:37a7c57f4641 24 void waitForFalling() {
O_Thom 13:37a7c57f4641 25 led = !led;
O_Thom 13:37a7c57f4641 26 switchInterrupt.fall(NULL);
O_Thom 13:37a7c57f4641 27 t.attach(callback(this, &SwitchManager::waitForStabilityFalling), 0.2);
O_Thom 13:37a7c57f4641 28 }
O_Thom 13:37a7c57f4641 29
O_Thom 13:37a7c57f4641 30 void waitForStabilityFalling() {
O_Thom 13:37a7c57f4641 31 //Look for rising edge
O_Thom 13:37a7c57f4641 32 switchInterrupt.rise(callback(this, &SwitchManager::waitForRising));
O_Thom 13:37a7c57f4641 33 }
O_Thom 13:37a7c57f4641 34
O_Thom 13:37a7c57f4641 35 public:
O_Thom 13:37a7c57f4641 36 SwitchManager(InterruptIn& intIn, DigitalOut& gpio) : switchInterrupt(intIn), led(gpio) {
O_Thom 13:37a7c57f4641 37 //Listen for rising edge
O_Thom 13:37a7c57f4641 38 switchInterrupt.rise(callback(this, &SwitchManager::waitForRising));
O_Thom 13:37a7c57f4641 39 }
O_Thom 13:37a7c57f4641 40 ~SwitchManager() {
O_Thom 13:37a7c57f4641 41 //Turn off LED and shut off any ISRs
O_Thom 13:37a7c57f4641 42 led = 0;
O_Thom 13:37a7c57f4641 43 switchInterrupt.rise(NULL);
O_Thom 13:37a7c57f4641 44 switchInterrupt.fall(NULL);
O_Thom 13:37a7c57f4641 45 t.detach();
O_Thom 13:37a7c57f4641 46 }
O_Thom 13:37a7c57f4641 47 };