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@2:66f36aff7050, 2012-11-23 (annotated)

Committer:
emilmont
Date:
Fri Nov 23 10:53:06 2012 +0000
Revision:
2:66f36aff7050
Parent:
1:7aa2ff92570b 
update libraries

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:7aa2ff92570b 1 #include "mbed.h"
emilmont 1:7aa2ff92570b 2 #include "cmsis_os.h"
emilmont 1:7aa2ff92570b 3
emilmont 1:7aa2ff92570b 4 osSemaphoreId two_slots;
emilmont 1:7aa2ff92570b 5 osSemaphoreDef(two_slots);
emilmont 1:7aa2ff92570b 6
emilmont 1:7aa2ff92570b 7 void test_thread(void const *name) {
emilmont 1:7aa2ff92570b 8 while (true) {
emilmont 1:7aa2ff92570b 9 osSemaphoreWait(two_slots, osWaitForever);
emilmont 1:7aa2ff92570b 10 printf("%s\n\r", (const char*)name);
emilmont 1:7aa2ff92570b 11 osDelay(1000);
emilmont 1:7aa2ff92570b 12 osSemaphoreRelease(two_slots);
emilmont 1:7aa2ff92570b 13 }
emilmont 1:7aa2ff92570b 14 }
emilmont 1:7aa2ff92570b 15
emilmont 1:7aa2ff92570b 16 void t2(void const *argument) {test_thread("Th 2");}
emilmont 1:7aa2ff92570b 17 osThreadDef(t2, osPriorityNormal, DEFAULT_STACK_SIZE);
emilmont 1:7aa2ff92570b 18
emilmont 1:7aa2ff92570b 19 void t3(void const *argument) {test_thread("Th 3");}
emilmont 1:7aa2ff92570b 20 osThreadDef(t3, osPriorityNormal, DEFAULT_STACK_SIZE);
emilmont 1:7aa2ff92570b 21
emilmont 1:7aa2ff92570b 22 int main (void) {
emilmont 1:7aa2ff92570b 23 two_slots = osSemaphoreCreate(osSemaphore(two_slots), 2);
emilmont 1:7aa2ff92570b 24
emilmont 1:7aa2ff92570b 25 osThreadCreate(osThread(t2), NULL);
emilmont 1:7aa2ff92570b 26 osThreadCreate(osThread(t3), NULL);
emilmont 1:7aa2ff92570b 27
emilmont 1:7aa2ff92570b 28 test_thread((void *)"Th 1");
emilmont 1:7aa2ff92570b 29 }