Lucas Pennati / Mbed OS ProducerConsumer

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main.cpp@0:6ab5b8697bfb, 2018-11-12 (annotated)

Committer:
lmottola
Date:
Mon Nov 12 12:10:30 2018 +0000
Revision:
0:6ab5b8697bfb
Child:
1:cc715a7c24a5
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lmottola 0:6ab5b8697bfb 1 #include "mbed.h"
lmottola 0:6ab5b8697bfb 2
lmottola 0:6ab5b8697bfb 3 DigitalOut led1(LED1);
lmottola 0:6ab5b8697bfb 4 InterruptIn button(USER_BUTTON);
lmottola 0:6ab5b8697bfb 5 EventQueue queue(32 * EVENTS_EVENT_SIZE);
lmottola 0:6ab5b8697bfb 6 Thread t;
lmottola 0:6ab5b8697bfb 7
lmottola 0:6ab5b8697bfb 8 void rise_handler_thread_context(void) {
lmottola 0:6ab5b8697bfb 9 printf("rise_handler_thread_context in context %p\r\n", Thread::gettid());
lmottola 0:6ab5b8697bfb 10 }
lmottola 0:6ab5b8697bfb 11
lmottola 0:6ab5b8697bfb 12 void rise_handler_iterrupt_context(void) {
lmottola 0:6ab5b8697bfb 13 // Execute the time critical part first
lmottola 0:6ab5b8697bfb 14 led1 = !led1;
lmottola 0:6ab5b8697bfb 15 // The rest can execute later in user context (and can contain code that's not interrupt safe)
lmottola 0:6ab5b8697bfb 16 // We use the 'queue.call' function to add an event (the call to 'rise_handler_user_context') to the queue
lmottola 0:6ab5b8697bfb 17 queue.call(rise_handler_thread_context);
lmottola 0:6ab5b8697bfb 18 }
lmottola 0:6ab5b8697bfb 19
lmottola 0:6ab5b8697bfb 20 void fall_handler(void) {
lmottola 0:6ab5b8697bfb 21 printf("fall_handler in context %p\r\n", Thread::gettid());
lmottola 0:6ab5b8697bfb 22 // Toggle LED
lmottola 0:6ab5b8697bfb 23 led1 = !led1;
lmottola 0:6ab5b8697bfb 24 }
lmottola 0:6ab5b8697bfb 25
lmottola 0:6ab5b8697bfb 26 int main() {
lmottola 0:6ab5b8697bfb 27 // Start the event queue
lmottola 0:6ab5b8697bfb 28 t.start(callback(&queue, &EventQueue::dispatch_forever));
lmottola 0:6ab5b8697bfb 29 printf("Starting in context %p\r\n", Thread::gettid());
lmottola 0:6ab5b8697bfb 30 // The 'rise' handler will execute in IRQ context
lmottola 0:6ab5b8697bfb 31 button.rise(rise_handler_iterrupt_context);
lmottola 0:6ab5b8697bfb 32 // The 'fall' handler will execute in the context of thread 't'
lmottola 0:6ab5b8697bfb 33 button.fall(queue.event(fall_handler));
lmottola 0:6ab5b8697bfb 34 }