mbed official / Mbed 2 deprecated cmsis_rtos_semaphore

Basic example showing the CMSIS-RTOS Semaphore API

Dependencies:   mbed mbed-rtos

mbed 2 and mbed OS 5

This is an mbed 2 example. mbed OS 5 has integrated the mbed library with mbed-rtos. For an mbed-os example, please see:

Import programrtos_semaphore

semaphore example

Last commit 02 Feb 2018 by mbed_example

main.cpp

Committer:
emilmont
Date:
2012-11-23
Revision:
2:66f36aff7050
Parent:
1:7aa2ff92570b

File content as of revision 2:66f36aff7050:

#include "mbed.h"
#include "cmsis_os.h"

osSemaphoreId two_slots;
osSemaphoreDef(two_slots);

void test_thread(void const *name) {
    while (true) {
        osSemaphoreWait(two_slots, osWaitForever);
        printf("%s\n\r", (const char*)name);
        osDelay(1000);
        osSemaphoreRelease(two_slots);
    }
}

void t2(void const *argument) {test_thread("Th 2");}
osThreadDef(t2, osPriorityNormal, DEFAULT_STACK_SIZE);

void t3(void const *argument) {test_thread("Th 3");}
osThreadDef(t3, osPriorityNormal, DEFAULT_STACK_SIZE);

int main (void) {
    two_slots = osSemaphoreCreate(osSemaphore(two_slots), 2);
    
    osThreadCreate(osThread(t2), NULL);
    osThreadCreate(osThread(t3), NULL);
    
    test_thread((void *)"Th 1");
}