Oliver Ainhirn / Mbed OS 84_OS_Events

Events programming

main.cpp@4:964e73eb0618, 2019-03-28 (annotated)

Committer:
corsa1600
Date:
Thu Mar 28 18:15:10 2019 +0000
Revision:
4:964e73eb0618
Parent:
3:26487f295213 
verbesserte Version des Queue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
corsa1600 0:c3df3a527006 1 #include "mbed.h"
corsa1600 0:c3df3a527006 2
corsa1600 0:c3df3a527006 3 DigitalOut led(LED1);
corsa1600 0:c3df3a527006 4 InterruptIn btn(p15);
corsa1600 3:26487f295213 5
corsa1600 3:26487f295213 6 EventQueue queue; // create an event queue
corsa1600 3:26487f295213 7
corsa1600 3:26487f295213 8 void fall_handler() {
corsa1600 3:26487f295213 9 // this now runs in the context of eventThread, instead of in the ISR
corsa1600 4:964e73eb0618 10 //led = !led; //-> IRQ Routine
corsa1600 4:964e73eb0618 11 printf("Printf context %p\r\n", Thread::gettid());
corsa1600 0:c3df3a527006 12 }
corsa1600 0:c3df3a527006 13
corsa1600 4:964e73eb0618 14 void fall_handler_isr()
corsa1600 4:964e73eb0618 15 {
corsa1600 4:964e73eb0618 16 led = !led;
corsa1600 4:964e73eb0618 17 queue.call(&fall_handler);
corsa1600 4:964e73eb0618 18 printf("ISR context %p\r\n", Thread::gettid()); // sollte nicht hier stehen
corsa1600 4:964e73eb0618 19
corsa1600 4:964e73eb0618 20
corsa1600 4:964e73eb0618 21 }
corsa1600 4:964e73eb0618 22
corsa1600 4:964e73eb0618 23
corsa1600 3:26487f295213 24 int main() {
corsa1600 3:26487f295213 25 // create a thread that'll run the event queue's dispatch function
corsa1600 3:26487f295213 26 Thread eventThread;
corsa1600 3:26487f295213 27 eventThread.start(callback(&queue, &EventQueue::dispatch_forever));
corsa1600 3:26487f295213 28 printf("Using Event Queue starting in context %p\r\n", Thread::gettid());
corsa1600 1:832c551222e1 29
corsa1600 3:26487f295213 30 // wrap calls in queue.event to automatically defer to the queue's thread
corsa1600 4:964e73eb0618 31 btn.fall(&fall_handler_isr);
corsa1600 4:964e73eb0618 32 // btn.fall(queue.event(&fall_handler_isr));
corsa1600 0:c3df3a527006 33 wait(osWaitForever);
corsa1600 0:c3df3a527006 34 }