Case study Embedded System Design
/
Case_Study_rtos_semaphore
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rtos_semaphore
by 
mbed official
Revision 4:388272bc6baf, committed 2015-05-08
- Comitter:
- cathal66
- Date:
- Fri May 08 10:24:54 2015 +0000
- Parent:
- 3:02e47d35a686
- Commit message:
- finished
Changed in this revision
--- a/main.cpp Tue Jun 04 16:05:26 2013 +0100
+++ b/main.cpp Fri May 08 10:24:54 2015 +0000
@@ -1,20 +1,20 @@
#include "mbed.h"
#include "rtos.h"
-Semaphore two_slots(2);
+Semaphore two_slots(2); //Setup the use of two semaphores
-void test_thread(void const *name) {
+void test_thread(void const *name) { //setup thread function
while (true) {
- two_slots.wait();
- printf("%s\n\r", (const char*)name);
- Thread::wait(1000);
- two_slots.release();
+ two_slots.wait(); //Wait to get a semaphore to use the
+ printf("%s\n\r", (const char*)name); //when have semaphore printf on serial of thread number
+ Thread::wait(1000); //thread wait
+ two_slots.release(); //Release semaphore back to RTOS
}
}
int main (void) {
- Thread t2(test_thread, (void *)"Th 2");
- Thread t3(test_thread, (void *)"Th 3");
+ Thread t2(test_thread, (void *)"Th 2"); //start thread
+ Thread t3(test_thread, (void *)"Th 3"); //start thread
- test_thread((void *)"Th 1");
+ test_thread((void *)"Th 1"); //function call in main thread
}
--- a/mbed-rtos.lib Tue Jun 04 16:05:26 2013 +0100 +++ b/mbed-rtos.lib Fri May 08 10:24:54 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed-rtos/ \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed-rtos/#83e169389a69
--- a/mbed.bld Tue Jun 04 16:05:26 2013 +0100 +++ b/mbed.bld Fri May 08 10:24:54 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/ \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/e188a91d3eaa \ No newline at end of file