diff --git a/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_CM_lib.h b/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_CM_lib.h
index e83b45b7b0..673c757a98 100755
--- a/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_CM_lib.h
+++ b/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_CM_lib.h
@@ -223,6 +223,9 @@ osThreadDef_t os_thread_def_main = {(os_pthread)main, osPriorityNormal, 0, NULL}
 #elif defined(TARGET_K64F)
 #define INITIAL_SP            (0x20030000UL)
 
+#elif defined(TARGET_K22F)
+#define INITIAL_SP            (0x20010000UL)
+
 #elif defined(TARGET_KL46Z)
 #define INITIAL_SP            (0x20006000UL)
 
diff --git a/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_Conf_CM.c b/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_Conf_CM.c
index 977928d7ba..464b510919 100755
--- a/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_Conf_CM.c
+++ b/libraries/rtos/rtx/TARGET_CORTEX_M/RTX_Conf_CM.c
@@ -50,12 +50,12 @@
 //   <i> Default: 6
 #ifndef OS_TASKCNT
 #  if   defined(TARGET_LPC1768) || defined(TARGET_LPC2368)   || defined(TARGET_LPC4088) || defined(TARGET_LPC4337) || defined(TARGET_LPC1347) || defined(TARGET_K64F) || defined(TARGET_STM32F401RE)\
-	 || defined(TARGET_KL46Z) || defined(TARGET_KL43Z)  || defined(TARGET_STM32F407) || defined(TARGET_F407VG)  || defined(TARGET_STM32F303VC) || defined(TARGET_LPC1549) || defined(TARGET_LPC11U68) || defined(TARGET_NRF51822) || defined(TARGET_STM32F411RE) \
-     || defined(TARGET_STM32F405RG)
+   || defined(TARGET_KL46Z) || defined(TARGET_KL43Z)  || defined(TARGET_STM32F407) || defined(TARGET_F407VG)  || defined(TARGET_STM32F303VC) || defined(TARGET_LPC1549) || defined(TARGET_LPC11U68) || defined(TARGET_NRF51822) || defined(TARGET_STM32F411RE) \
+   || defined(TARGET_STM32F405RG) || defined(TARGET_K22F)
 #    define OS_TASKCNT         14
 #  elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11U35_401)  || defined(TARGET_LPC11U35_501) || defined(TARGET_LPCCAPPUCCINO) || defined(TARGET_LPC1114) \
-	 || defined(TARGET_LPC812)   || defined(TARGET_KL25Z)         || defined(TARGET_KL05Z)        || defined(TARGET_STM32F100RB)  || defined(TARGET_STM32F051R8) \
-	 || defined(TARGET_STM32F103RB) || defined(TARGET_LPC824) || defined(TARGET_STM32F302R8) || defined(TARGET_STM32F334R8) || defined(TARGET_STM32F334C8)
+   || defined(TARGET_LPC812)   || defined(TARGET_KL25Z)         || defined(TARGET_KL05Z)        || defined(TARGET_STM32F100RB)  || defined(TARGET_STM32F051R8) \
+   || defined(TARGET_STM32F103RB) || defined(TARGET_LPC824) || defined(TARGET_STM32F302R8) || defined(TARGET_STM32F334R8) || defined(TARGET_STM32F334C8)
 #    define OS_TASKCNT         6
 #  else
 #    error "no target defined"
@@ -65,12 +65,12 @@
 //   <o>Scheduler (+ interrupts) stack size [bytes] <64-4096:8><#/4>
 #ifndef OS_SCHEDULERSTKSIZE
 #  if   defined(TARGET_LPC1768) || defined(TARGET_LPC2368)   || defined(TARGET_LPC4088) || defined(TARGET_LPC4337) || defined(TARGET_LPC1347)  || defined(TARGET_K64F) || defined(TARGET_STM32F401RE)\
-	 || defined(TARGET_KL46Z) || defined(TARGET_KL43Z) || defined(TARGET_STM32F407) || defined(TARGET_F407VG)  || defined(TARGET_STM32F303VC) || defined(TARGET_LPC1549) || defined(TARGET_LPC11U68) || defined(TARGET_NRF51822) || defined(TARGET_STM32F411RE) \
-     || defined(TARGET_STM32F405RG)
+   || defined(TARGET_KL46Z) || defined(TARGET_KL43Z) || defined(TARGET_STM32F407) || defined(TARGET_F407VG)  || defined(TARGET_STM32F303VC) || defined(TARGET_LPC1549) || defined(TARGET_LPC11U68) || defined(TARGET_NRF51822) || defined(TARGET_STM32F411RE) \
+   || defined(TARGET_STM32F405RG) || defined(TARGET_K22F)
 #      define OS_SCHEDULERSTKSIZE    256
 #  elif defined(TARGET_LPC11U24) || defined(TARGET_LPC11U35_401)  || defined(TARGET_LPC11U35_501) || defined(TARGET_LPCCAPPUCCINO)  || defined(TARGET_LPC1114) \
-	 || defined(TARGET_LPC812)   || defined(TARGET_KL25Z)         || defined(TARGET_KL05Z)        || defined(TARGET_STM32F100RB)  || defined(TARGET_STM32F051R8) \
-	 || defined(TARGET_STM32F103RB) || defined(TARGET_LPC824) || defined(TARGET_STM32F302R8) || defined(TARGET_STM32F334R8) || defined(TARGET_STM32F334C8)
+   || defined(TARGET_LPC812)   || defined(TARGET_KL25Z)         || defined(TARGET_KL05Z)        || defined(TARGET_STM32F100RB)  || defined(TARGET_STM32F051R8) \
+   || defined(TARGET_STM32F103RB) || defined(TARGET_LPC824) || defined(TARGET_STM32F302R8) || defined(TARGET_STM32F334R8) || defined(TARGET_STM32F334C8)
 #      define OS_SCHEDULERSTKSIZE    128
 #  else
 #    error "no target defined"
@@ -131,7 +131,7 @@
 #  elif  defined(TARGET_STM32F100RB)
 #    define OS_CLOCK       24000000
 
-#  elif defined(TARGET_LPC4088) || defined(TARGET_K64F)
+#  elif defined(TARGET_LPC4088) || defined(TARGET_K64F) || defined(TARGET_K22F)
 #    define OS_CLOCK       120000000
 
 #  elif defined(TARGET_LPC4337)