Rtos API example

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0:9fca2b23d0ba
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+Note: This is just a template, so feel free to use/remove the unnecessary things
+
+### Description
+- Type: Bug | Enhancement | Question
+- Related issue: `#abc`
+- Priority: Blocker | Major | Minor
+
+---------------------------------------------------------------
+## Bug
+
+**Target**
+K64F|??
+
+**Toolchain:**
+GCC_ARM|ARM|IAR
+
+**Toolchain version:**
+
+**mbed-cli version:** 
+(`mbed --version`)
+
+**mbed-os sha:**
+(`git log -n1 --oneline`)
+
+**DAPLink version:**
+
+**Expected behavior**
+
+**Actual behavior**
+
+**Steps to reproduce**
+
+----------------------------------------------------------------
+## Enhancement
+
+**Reason to enhance or problem with existing solution**
+
+**Suggested enhancement**
+
+**Pros**
+
+**Cons**
+
+-----------------------------------------------------------------
+
+## Question
+
+**How to?**