diff --git a/demos/bsp/boards/board.c b/demos/bsp/boards/board.c
index e3c336cde..31186c35a 100644
--- a/demos/bsp/boards/board.c
+++ b/demos/bsp/boards/board.c
@@ -38,7 +38,7 @@
 
 #include "board.h"
 
-#if TUSB_CFG_OS == TUSB_OS_NONE
+#if TUSB_CFG_OS == TUSB_OS_NONE // TODO may move to main.c
 volatile uint32_t system_ticks = 0;
 
 void SysTick_Handler (void)
diff --git a/demos/bsp/boards/embedded_artists/board_ea4357.c b/demos/bsp/boards/embedded_artists/board_ea4357.c
index f2835bd6a..a415c793c 100644
--- a/demos/bsp/boards/embedded_artists/board_ea4357.c
+++ b/demos/bsp/boards/embedded_artists/board_ea4357.c
@@ -48,9 +48,11 @@
 
 void board_init(void)
 {
-  SystemInit();
   CGU_Init();
+
+//#if TUSB_CFG_OS != TUSB_OS_CMSIS_RTX // TODO may move to main.c
   SysTick_Config(CGU_GetPCLKFrequency(CGU_PERIPHERAL_M4CORE) / CFG_TICKS_PER_SECOND); // 1 msec tick timer
+//#endif
 
   // USB0 Power: EA4357 channel B U20 GPIO26 active low (base board), P2_3 on LPC4357
   scu_pinmux(0x2, 3, MD_PUP | MD_EZI, FUNC7);		// USB0 VBus Power
diff --git a/demos/bsp/boards/hitex/board_hitex4350.c b/demos/bsp/boards/hitex/board_hitex4350.c
index 2ba54e46c..5422fad4c 100644
--- a/demos/bsp/boards/hitex/board_hitex4350.c
+++ b/demos/bsp/boards/hitex/board_hitex4350.c
@@ -53,7 +53,6 @@
 //--------------------------------------------------------------------+
 void board_init(void)
 {
-  SystemInit();
   CGU_Init();
   SysTick_Config(CGU_GetPCLKFrequency(CGU_PERIPHERAL_M4CORE) / CFG_TICKS_PER_SECOND); // 1 msec tick timer
 
diff --git a/demos/bsp/boards/keil/board_mcb4300.c b/demos/bsp/boards/keil/board_mcb4300.c
index 57ce2591c..773dab4c5 100644
--- a/demos/bsp/boards/keil/board_mcb4300.c
+++ b/demos/bsp/boards/keil/board_mcb4300.c
@@ -72,7 +72,6 @@ const static struct {
 //--------------------------------------------------------------------+
 void board_init(void)
 {
-  SystemInit();
   CGU_Init();
   SysTick_Config(CGU_GetPCLKFrequency(CGU_PERIPHERAL_M4CORE) / CFG_TICKS_PER_SECOND); // 1 msec tick timer
 
diff --git a/demos/bsp/boards/microbuilder/board_lpc4357usb.c b/demos/bsp/boards/microbuilder/board_lpc4357usb.c
index 83f9c8b16..c8bcab8ef 100644
--- a/demos/bsp/boards/microbuilder/board_lpc4357usb.c
+++ b/demos/bsp/boards/microbuilder/board_lpc4357usb.c
@@ -53,7 +53,6 @@
 
 void board_init(void)
 {
-  SystemInit();
   CGU_Init();
   
   /* Setup the systick time for 1ms ticks */
diff --git a/demos/bsp/boards/ngx/board_ngx4330.c b/demos/bsp/boards/ngx/board_ngx4330.c
index 620393d21..a09cc10fb 100644
--- a/demos/bsp/boards/ngx/board_ngx4330.c
+++ b/demos/bsp/boards/ngx/board_ngx4330.c
@@ -48,36 +48,35 @@ const static struct {
 
 void board_init(void)
 {
-  SystemInit();
   CGU_Init();
-	SysTick_Config( CGU_GetPCLKFrequency(CGU_PERIPHERAL_M4CORE)/CFG_TICKS_PER_SECOND );	/* 1 ms Timer */
+  SysTick_Config( CGU_GetPCLKFrequency(CGU_PERIPHERAL_M4CORE)/CFG_TICKS_PER_SECOND );	/* 1 ms Timer */
 
-	//------------- USB Bus power HOST ONLY-------------//
-	scu_pinmux(0x1, 7, MD_PUP | MD_EZI, FUNC4);	// P1_7 USB0_PWR_EN, USB0 VBus function Xplorer
+  //------------- USB Bus power HOST ONLY-------------//
+  scu_pinmux(0x1, 7, MD_PUP | MD_EZI, FUNC4);	// P1_7 USB0_PWR_EN, USB0 VBus function Xplorer
 
-	scu_pinmux(0x2, 6, MD_PUP | MD_EZI, FUNC4); // P2_6 is configured as GPIO5[6] for USB1_PWR_EN
-	GPIO_SetDir   (5, BIT_(6), 1);              // GPIO5[6] is output
-	GPIO_SetValue (5, BIT_(6));                 // GPIO5[6] output high
+  scu_pinmux(0x2, 6, MD_PUP | MD_EZI, FUNC4); // P2_6 is configured as GPIO5[6] for USB1_PWR_EN
+  GPIO_SetDir   (5, BIT_(6), 1);              // GPIO5[6] is output
+  GPIO_SetValue (5, BIT_(6));                 // GPIO5[6] output high
 
-	// Leds Init
-	for (uint8_t i=0; i<BOARD_MAX_LEDS; i++)
-	{
-	  scu_pinmux(leds[i].port, leds[i].pin, MD_PUP|MD_EZI|MD_ZI, FUNC0);
-	  GPIO_SetDir(leds[i].port, BIT_(leds[i].pin), 1); // output
-	}
+  // Leds Init
+  for (uint8_t i=0; i<BOARD_MAX_LEDS; i++)
+  {
+    scu_pinmux(leds[i].port, leds[i].pin, MD_PUP|MD_EZI|MD_ZI, FUNC0);
+    GPIO_SetDir(leds[i].port, BIT_(leds[i].pin), 1); // output
+  }
 
 #if CFG_UART_ENABLE
-	//------------- UART init -------------//
-	UART_CFG_Type UARTConfigStruct;
+  //------------- UART init -------------//
+  UART_CFG_Type UARTConfigStruct;
 
-	scu_pinmux(0x6 ,4, MD_PDN|MD_EZI, FUNC2); 	// UART0_TXD
-	scu_pinmux(0x6 ,5, MD_PDN|MD_EZI, FUNC2); 	// UART0_RXD
+  scu_pinmux(0x6 ,4, MD_PDN|MD_EZI, FUNC2); 	// UART0_TXD
+  scu_pinmux(0x6 ,5, MD_PDN|MD_EZI, FUNC2); 	// UART0_RXD
 
-	UART_ConfigStructInit(&UARTConfigStruct);                   // default: baud = 9600, 8 bit data, 1 stop bit, no parity
-	UARTConfigStruct.Baud_rate = CFG_UART_BAUDRATE;             // Re-configure baudrate
+  UART_ConfigStructInit(&UARTConfigStruct);                   // default: baud = 9600, 8 bit data, 1 stop bit, no parity
+  UARTConfigStruct.Baud_rate = CFG_UART_BAUDRATE;             // Re-configure baudrate
 
-	UART_Init((LPC_USARTn_Type*) LPC_USART0, &UARTConfigStruct); // Initialize UART port
-	UART_TxCmd((LPC_USARTn_Type*) LPC_USART0, ENABLE);           // Enable UART
+  UART_Init((LPC_USARTn_Type*) LPC_USART0, &UARTConfigStruct); // Initialize UART port
+  UART_TxCmd((LPC_USARTn_Type*) LPC_USART0, ENABLE);           // Enable UART
 #endif
 
 }
diff --git a/tinyusb/host/usbh.c b/tinyusb/host/usbh.c
index a4cbabb9d..99072bc7f 100644
--- a/tinyusb/host/usbh.c
+++ b/tinyusb/host/usbh.c
@@ -108,7 +108,7 @@ static host_class_driver_t const usbh_class_drivers[TUSB_CLASS_MAPPED_INDEX_END]
 usbh_device_info_t usbh_devices[TUSB_CFG_HOST_DEVICE_MAX+1] TUSB_CFG_ATTR_USBRAM; // including zero-address
 
 //------------- Enumeration Task Data -------------//
-OSAL_TASK_DEF(enum_task_def, "tinyusb host", usbh_enumeration_task, 150, TUSB_CFG_OS_TASK_PRIO);
+OSAL_TASK_DEF(usbh_enumeration_task, 150, TUSB_CFG_OS_TASK_PRIO);
 OSAL_QUEUE_DEF(enum_queue_def, ENUM_QUEUE_DEPTH, uint32_t);
 osal_queue_handle_t enum_queue_hdl;
 STATIC_ uint8_t enum_data_buffer[TUSB_CFG_HOST_ENUM_BUFFER_SIZE] TUSB_CFG_ATTR_USBRAM;
@@ -136,7 +136,7 @@ static inline uint8_t std_class_code_to_index(uint8_t std_class_code)
 tusb_device_state_t tusbh_device_get_state (uint8_t const dev_addr)
 {
   ASSERT_INT_WITHIN(1, TUSB_CFG_HOST_DEVICE_MAX, dev_addr, TUSB_DEVICE_STATE_INVALID_PARAMETER);
-  return usbh_devices[dev_addr].state;
+  return (tusb_device_state_t) usbh_devices[dev_addr].state;
 }
 
 uint32_t tusbh_device_get_mounted_class_flag(uint8_t dev_addr)
@@ -154,9 +154,9 @@ tusb_error_t usbh_init(void)
   ASSERT_STATUS( hcd_init() );
 
   //------------- Enumeration & Reporter Task init -------------//
-  ASSERT_STATUS( osal_task_create(&enum_task_def) );
-  enum_queue_hdl = osal_queue_create(&enum_queue_def);
+  enum_queue_hdl = osal_queue_create( OSAL_QUEUE_REF(enum_queue_def) );
   ASSERT_PTR(enum_queue_hdl, TUSB_ERROR_OSAL_QUEUE_FAILED);
+  ASSERT_STATUS( osal_task_create( OSAL_TASK_REF(usbh_enumeration_task) ));
 
   //------------- Semaphore, Mutex for Control Pipe -------------//
   for(uint8_t i=0; i<TUSB_CFG_HOST_DEVICE_MAX+1; i++) // including address zero
@@ -166,7 +166,7 @@ tusb_error_t usbh_init(void)
     p_device->control.sem_hdl = osal_semaphore_create( OSAL_SEM_REF(p_device->control.semaphore) );
     ASSERT_PTR(p_device->control.sem_hdl, TUSB_ERROR_OSAL_SEMAPHORE_FAILED);
 
-    p_device->control.mutex_hdl = osal_mutex_create ( OSAL_SEM_REF(p_device->control.mutex) );
+    p_device->control.mutex_hdl = osal_mutex_create ( OSAL_MUTEX_REF(p_device->control.mutex) );
     ASSERT_PTR(p_device->control.mutex_hdl, TUSB_ERROR_OSAL_MUTEX_FAILED);
   }
 
@@ -187,7 +187,7 @@ tusb_error_t usbh_init(void)
 tusb_error_t usbh_control_xfer_subtask(uint8_t dev_addr, uint8_t bmRequestType, uint8_t bRequest,
                                        uint16_t wValue, uint16_t wIndex, uint16_t wLength, uint8_t* data)
 {
-  tusb_error_t error;
+  static tusb_error_t error; // FIXME cmsis-rtx use svc for OS API, error value changed after mutex release at the end of function
 
   OSAL_SUBTASK_BEGIN
 
diff --git a/tinyusb/osal/osal_common.h b/tinyusb/osal/osal_common.h
index a70242e70..b97e68af4 100644
--- a/tinyusb/osal/osal_common.h
+++ b/tinyusb/osal/osal_common.h
@@ -65,6 +65,7 @@ enum
   OSAL_TIMEOUT_WAIT_FOREVER = 0x0EEEEEEE
 };
 
+// TODO refractor/remove this function and/or TUSB_CFG_OS_TICKS_PER_SECOND if using an RTOS
 static inline uint32_t osal_tick_from_msec(uint32_t msec) ATTR_CONST ATTR_ALWAYS_INLINE;
 static inline uint32_t osal_tick_from_msec(uint32_t msec)
 {
diff --git a/vendor/cmsis_rtos_rtx/RTX_Conf_CM.c b/vendor/cmsis_rtos_rtx/RTX_Conf_CM.c
index 2250b5142..011df7cbc 100644
--- a/vendor/cmsis_rtos_rtx/RTX_Conf_CM.c
+++ b/vendor/cmsis_rtos_rtx/RTX_Conf_CM.c
@@ -115,7 +115,7 @@
 //   <i> Defines the timer tick value.
 //   <i> Default: 1000  (1ms)
 #ifndef OS_TICK
- #define OS_TICK        10000
+ #define OS_TICK        1000
 #endif
 
 // </h>