diff --git a/tinyusb/hal/hal.h b/tinyusb/hal/hal.h
index 941063665..f95d62ae9 100644
--- a/tinyusb/hal/hal.h
+++ b/tinyusb/hal/hal.h
@@ -72,28 +72,16 @@ extern "C" {
 // callback from tusb.h
 extern void tusb_isr(uint8_t controller_id);
 
+/// USB hardware init
+tusb_error_t hal_init(void);
 
-/** \brief USB hardware init
- *
- * \param[in]  para1
- * \param[out] para2
- * \return Error Code of the \ref TUSB_ERROR enum
- * \note
- */
-tusb_error_t hal_init();
+/// Enable USB Interrupt
+static inline void hal_interrupt_enable(uint8_t controller_id) ATTR_ALWAYS_INLINE;
+/// Disable USB Interrupt
+static inline void hal_interrupt_disable(uint8_t controller_id) ATTR_ALWAYS_INLINE;
 
-/**
- * Enable USB Interrupt
- */
-static inline void hal_interrupt_enable() ATTR_ALWAYS_INLINE;
-
-/**
- * Disable USB Interrupt
- */
-static inline void hal_interrupt_disable() ATTR_ALWAYS_INLINE;
-
-static inline bool hal_debugger_is_attached() ATTR_PURE ATTR_ALWAYS_INLINE;
-static inline bool hal_debugger_is_attached()
+static inline bool hal_debugger_is_attached(void) ATTR_PURE ATTR_ALWAYS_INLINE;
+static inline bool hal_debugger_is_attached(void)
 {
 #ifndef _TEST_
   return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) == CoreDebug_DHCSR_C_DEBUGEN_Msk;
@@ -102,8 +90,8 @@ static inline bool hal_debugger_is_attached()
 #endif
 }
 
-static inline void hal_debugger_breakpoint() ATTR_ALWAYS_INLINE;
-static inline void hal_debugger_breakpoint()
+static inline void hal_debugger_breakpoint(void) ATTR_ALWAYS_INLINE;
+static inline void hal_debugger_breakpoint(void)
 {
 #ifndef _TEST_
   if (hal_debugger_is_attached()) /* if there is debugger connected */
diff --git a/tinyusb/hal/hal_lpc11uxx.h b/tinyusb/hal/hal_lpc11uxx.h
index 19fd79c23..b8acdec2a 100644
--- a/tinyusb/hal/hal_lpc11uxx.h
+++ b/tinyusb/hal/hal_lpc11uxx.h
@@ -64,13 +64,15 @@
 #endif
 
 
-static inline void hal_interrupt_enable()
+static inline void hal_interrupt_enable(uint8_t controller_id)
 {
+  (void) controller_id; // discard compiler's warning
   NVIC_EnableIRQ(USB_IRQn);
 }
 
-static inline void hal_interrupt_disable()
+static inline void hal_interrupt_disable(uint8_t controller_id)
 {
+  (void) controller_id; // discard compiler's warning
   NVIC_DisableIRQ(USB_IRQn);
 }
 
diff --git a/tinyusb/hal/hal_lpc13uxx.h b/tinyusb/hal/hal_lpc13uxx.h
index 83d2f9ecd..aa319b228 100644
--- a/tinyusb/hal/hal_lpc13uxx.h
+++ b/tinyusb/hal/hal_lpc13uxx.h
@@ -61,13 +61,15 @@
  extern "C" {
 #endif
 
-static inline void hal_interrupt_enable()
+static inline void hal_interrupt_enable(uint8_t controller_id)
 {
+  (void) controller_id; // discard compiler's warning
   NVIC_EnableIRQ(USB_IRQ_IRQn);
 }
 
-static inline void hal_interrupt_disable()
+static inline void hal_interrupt_disable(uint8_t controller_id)
 {
+  (void) controller_id; // discard compiler's warning
   NVIC_DisableIRQ(USB_IRQ_IRQn);
 }
 
diff --git a/tinyusb/hal/hal_lpc43xx.c b/tinyusb/hal/hal_lpc43xx.c
index 388552ec1..5d6a7f5ca 100644
--- a/tinyusb/hal/hal_lpc43xx.c
+++ b/tinyusb/hal/hal_lpc43xx.c
@@ -52,7 +52,7 @@ enum {
   LPC43XX_USBMODE_VBUS_HIGH = 1
 };
 
-tusb_error_t hal_init()
+tusb_error_t hal_init(void)
 {
   /* Set up USB0 clock */
   CGU_EnableEntity(CGU_CLKSRC_PLL0, DISABLE); /* Disable PLL first */
@@ -62,10 +62,10 @@ tusb_error_t hal_init()
   LPC_CREG->CREG0 &= ~(1<<5); /* Turn on the phy */
 
   //------------- reset controller & set role -------------//
-  hcd_controller_reset(0); // TODO where to place prototype
+  hcd_controller_reset(0); // TODO where to place prototype, USB1
   LPC_USB0->USBMODE_H = LPC43XX_USBMODE_HOST | (LPC43XX_USBMODE_VBUS_HIGH << 5);
 
-  hal_interrupt_enable();
+  hal_interrupt_enable(0); // TODO USB1
 
   return TUSB_ERROR_NONE;
 }
diff --git a/tinyusb/hal/hal_lpc43xx.h b/tinyusb/hal/hal_lpc43xx.h
index 63da8a37c..9afbf8bbd 100644
--- a/tinyusb/hal/hal_lpc43xx.h
+++ b/tinyusb/hal/hal_lpc43xx.h
@@ -61,14 +61,14 @@
 #define DEVICE_ROM_REG_BASE LPC_USB0_BASE // TODO USB1
 #define DEVICE_ROM_DRIVER_ADDR     0x1040011C
 
-static inline void hal_interrupt_enable()
+static inline void hal_interrupt_enable(uint8_t controller_id)
 {
-  NVIC_EnableIRQ(USB0_IRQn); // TODO USB1
+  NVIC_EnableIRQ(controller_id ? USB1_IRQn : USB0_IRQn);
 }
 
-static inline void hal_interrupt_disable()
+static inline void hal_interrupt_disable(uint8_t controller_id)
 {
-  NVIC_DisableIRQ(USB0_IRQn); // TODO USB1
+  NVIC_DisableIRQ(controller_id ? USB1_IRQn : USB0_IRQn);
 }
 
 #ifdef __cplusplus
diff --git a/tinyusb/host/usbh.c b/tinyusb/host/usbh.c
index f871d8979..dbc0c2765 100644
--- a/tinyusb/host/usbh.c
+++ b/tinyusb/host/usbh.c
@@ -61,7 +61,7 @@ void tusb_tick_tock(void)
 #define ENUM_QUEUE_DEPTH  5
 
 // TODO fix number of class driver
-class_driver_t const usbh_class_drivers[TUSB_CLASS_MAX_CONSEC_NUMBER] =
+static class_driver_t const usbh_class_drivers[TUSB_CLASS_MAX_CONSEC_NUMBER] =
 {
     [TUSB_CLASS_HID] = {
         .init = hidh_init,