mbed_example / Mbed OS Shared_Events_1

Shared event example. Instead of creating special thread user can use shared event queue i.e. sharing it with other system components and saving RAM. As the event queue is shared, you should limit the execution time of your event functions to avoid delaying other users’ events excessively.

main.cpp

Committer:
deepikabhavnani
Date:
2017-12-18
Revision:
0:7c7d5b625e59

File content as of revision 0:7c7d5b625e59:

#include "mbed.h"
#include "mbed_events.h"
 
DigitalOut led1(LED1);
InterruptIn sw(SW2);
 
void rise_handler(void) {
    // Toggle LED
    led1 = !led1;
}
 
void fall_handler(void) {
    printf("fall_handler in context %p\r\n", Thread::gettid());
    // Toggle LED
    led1 = !led1;
}
 
int main() {
    // Request the shared queue
    EventQueue *queue = mbed_event_queue();
    printf("Starting in context %p\r\n", Thread::gettid());
    // The 'rise' handler will execute in IRQ context
    sw.rise(rise_handler);
    // The 'fall' handler will execute in the context of the shared queue thread
    sw.fall(queue->event(fall_handler));
}