add lib/CMSIS_5 v5.7 locally

lib/CMSIS_5/CMSIS/RTOS2/RTX/Template/Semaphore.c

@@ -0,0 +1,50 @@
+#include "cmsis_os2.h"                          // CMSIS RTOS header file
+ 
+/*----------------------------------------------------------------------------
+ *      Semaphore creation & usage
+ *---------------------------------------------------------------------------*/
+ 
+osSemaphoreId_t sid_Semaphore;                  // semaphore id
+ 
+osThreadId_t tid_Thread_Semaphore;              // thread id
+ 
+void Thread_Semaphore (void *argument);         // thread function
+ 
+int Init_Semaphore (void) {
+ 
+  sid_Semaphore = osSemaphoreNew(2U, 2U, NULL);
+  if (sid_Semaphore == NULL) {
+    ; // Semaphore object not created, handle failure
+  }
+ 
+  tid_Thread_Semaphore = osThreadNew(Thread_Semaphore, NULL, NULL);
+  if (tid_Thread_Semaphore == NULL) {
+    return(-1);
+  }
+ 
+  return(0);
+}
+ 
+void Thread_Semaphore (void *argument) {
+  int32_t val;
+ 
+  while (1) {
+    ; // Insert thread code here...
+ 
+    val = osSemaphoreAcquire(sid_Semaphore, 10U);       // wait 10 mSec
+    switch (val) {
+      case osOK:
+        ; // Use protected code here...
+        osSemaphoreRelease(sid_Semaphore);              // return a token back to a semaphore
+        break;
+      case osErrorResource:
+        break;
+      case osErrorParameter:
+        break;
+      default:
+        break;
+    }
+ 
+    osThreadYield();                                    // suspend thread
+  }
+}