RTOS2/RTX5: Update SysTick implementation for OS Tick (initial count …

…value)
ARM-software · Jan 25, 2023 · 2e02216 · 2e02216
1 parent bbfbe18
commit 2e02216
Show file tree

Hide file tree

Showing 2 changed files with 15 additions and 5 deletions.
diff --git a/CMSIS/DoxyGen/RTOS2/src/history.txt b/CMSIS/DoxyGen/RTOS2/src/history.txt
@@ -102,6 +102,7 @@
       <td>V5.5.5</td>
       <td>
        - Added de-allocation of Arm C library thread data (libspace) when thread is terminated.
+       - Updated SysTick implementation for OS Tick (initial count value).
       </td>
     </tr>
     <tr>

diff --git a/CMSIS/RTOS2/Source/os_systick.c b/CMSIS/RTOS2/Source/os_systick.c
@@ -1,11 +1,11 @@
 /**************************************************************************//**
  * @file     os_systick.c
  * @brief    CMSIS OS Tick SysTick implementation
- * @version  V1.0.3
- * @date     19. March 2021
+ * @version  V1.0.4
+ * @date     20. January 2023
  ******************************************************************************/
 /*
- * Copyright (c) 2017-2021 ARM Limited. All rights reserved.
+ * Copyright (c) 2017-2023 ARM Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -121,8 +121,17 @@ __WEAK uint32_t OS_Tick_GetInterval (void) {
 
 // Get OS Tick count value.
 __WEAK uint32_t OS_Tick_GetCount (void) {
-  uint32_t load = SysTick->LOAD;
-  return  (load - SysTick->VAL);
+  uint32_t val;
+  uint32_t count;
+
+  val = SysTick->VAL;
+  if (val != 0U) {
+    count = (SysTick->LOAD - val) + 1U;
+  } else {
+    count = 0U;
+  }
+
+  return (count);
 }
 
 // Get OS Tick overflow status.