diff --git a/examples/device/device_composite/ses/device_composite.emProject b/examples/device/device_composite/ses/device_composite.emProject
index e63a9fb0..4ea41db2 100644
--- a/examples/device/device_composite/ses/device_composite.emProject
+++ b/examples/device/device_composite/ses/device_composite.emProject
@@ -158,7 +158,7 @@
                 </folder>
                 <folder Name="hpl">
                   <folder Name="core">
-                    <file file_name="../../../../../../../adafruit/circuitpython/thach_cp/ports/atmel-samd/asf4/samd51/hpl/core/hpl_init.c" />
+                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/core/hpl_init.c" />
                   </folder>
                   <folder Name="osc32kctrl">
                     <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/osc32kctrl/hpl_osc32kctrl.c" />
@@ -201,22 +201,21 @@
       Name="Common"
       Placement="Flash"
       Target="nRF52840_xxAA"
-      arm_architecture="v7EM"
-      arm_core_type="Cortex-M4"
+      arm_architecture="v6M"
+      arm_core_type="Cortex-M0+"
       arm_endian="Little"
-      arm_fp_abi="Hard"
-      arm_fpu_type="FPv4-SP-D16"
+      arm_fpu_type="None"
       arm_interwork="No"
       arm_linker_heap_size="1024"
       arm_linker_process_stack_size="0"
       arm_linker_stack_size="1024"
       arm_simulator_memory_simulation_parameter="RX 00000000,00080000,FFFFFFFF;RWX 20000000,00030000,CDCDCDCD"
       arm_target_debug_interface_type="ADIv5"
-      arm_target_device_name="ATSAMD51J19"
+      arm_target_device_name="ATSAMD21G18A"
       arm_target_interface_type="SWD"
       build_treat_warnings_as_errors="Yes"
       c_preprocessor_definitions="__SAMD21G18A__;__SAMD21_FAMILY;__SAM_D21_SUBFAMILY;ARM_MATH_CM0PLUS;FLASH_PLACEMENT=1;USE_SIMPLE_ASSERT;CIRCUITPY_GCLK_INIT_1ST=0xffff;BOARD_METRO_M0_EXPRESS;CFG_TUSB_MCU=OPT_MCU_SAMD21"
-      c_user_include_directories="../src;$(rootDir)/hw/cmsis/Include;$(rootDir)/hw;$(rootDir)/src;$(asf4Dir);$(asf4Dir)/include;$(asf4Dir)/config;$(asf4Dir)/hri;$(asf4Dir)/hal/include;$(asf4Dir)/hal/utils/include;$(asf4Dir)/hpl/port;$(asf4Dir)/hpl/gclk"
+      c_user_include_directories="../src;$(rootDir)/hw/cmsis/Include;$(rootDir)/hw;$(rootDir)/src;$(asf4Dir);$(asf4Dir)/include;$(asf4Dir)/config;$(asf4Dir)/hri;$(asf4Dir)/hal/include;$(asf4Dir)/hal/utils/include;$(asf4Dir)/hpl/port;$(asf4Dir)/hpl/gclk;$(asf4Dir)/hpl/pm"
       debug_register_definition_file="ses_samd21/ATSAMD21G18A_Registers.xml"
       debug_target_connection="J-Link"
       gcc_entry_point="Reset_Handler"
@@ -228,7 +227,7 @@
       project_directory=""
       project_type="Executable"
       target_reset_script="Reset();"
-      target_script_file="$(ProjectDir)/ses_samd51/SAMD51_Target.js"
+      target_script_file="$(ProjectDir)/ses_samd21/SAMD21_Target.js"
       target_trace_initialize_script="EnableTrace(&quot;$(TraceInterfaceType)&quot;)" />
     <folder
       Name="tinyusb"
@@ -249,25 +248,22 @@
         <folder Name="microchip">
           <folder Name="samd">
             <folder Name="asf4">
-              <folder Name="samd51">
+              <folder Name="samd21">
                 <folder Name="gcc">
-                  <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/gcc/system_samd51.c" />
+                  <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd21/gcc/system_samd21.c" />
                 </folder>
                 <folder Name="hpl">
                   <folder Name="core">
-                    <file file_name="../../../../../../../adafruit/circuitpython/thach_cp/ports/atmel-samd/asf4/samd51/hpl/core/hpl_init.c" />
-                  </folder>
-                  <folder Name="osc32kctrl">
-                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/osc32kctrl/hpl_osc32kctrl.c" />
-                  </folder>
-                  <folder Name="oscctrl">
-                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/oscctrl/hpl_oscctrl.c" />
-                  </folder>
-                  <folder Name="mclk">
-                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/mclk/hpl_mclk.c" />
+                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd21/hpl/core/hpl_init.c" />
                   </folder>
                   <folder Name="gclk">
-                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd51/hpl/gclk/hpl_gclk.c" />
+                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd21/hpl/gclk/hpl_gclk.c" />
+                  </folder>
+                  <folder Name="pm">
+                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd21/hpl/pm/hpl_pm.c" />
+                  </folder>
+                  <folder Name="sysctrl">
+                    <file file_name="../../../../hw/mcu/microchip/samd/asf4/samd21/hpl/sysctrl/hpl_sysctrl.c" />
                   </folder>
                 </folder>
               </folder>
@@ -283,7 +279,7 @@
       filter="*.c;*.h"
       path="../src"
       recurse="Yes" />
-    <folder Name="samd21">
+    <folder Name="ses_samd21">
       <file file_name="ses_samd21/ATSAMD21G18A_MemoryMap.xml" />
       <file file_name="ses_samd21/ATSAMD21G18A_Registers.xml" />
       <file file_name="ses_samd21/ATSAMD21G18A_Vectors.s" />
diff --git a/examples/device/device_composite/ses/ses_samd21/ATSAMD21G18A_MemoryMap.xml b/examples/device/device_composite/ses/ses_samd21/ATSAMD21G18A_MemoryMap.xml
index f5002347..2143d305 100644
--- a/examples/device/device_composite/ses/ses_samd21/ATSAMD21G18A_MemoryMap.xml
+++ b/examples/device/device_composite/ses/ses_samd21/ATSAMD21G18A_MemoryMap.xml
@@ -1,5 +1,5 @@
 <!DOCTYPE Board_Memory_Definition_File>
 <root name="ATSAMD21G18A">
-  <MemorySegment name="FLASH" start="0x00000000" size="0x00040000" access="ReadOnly" />
+  <MemorySegment name="FLASH" start="0x00002000" size="0x0003E000" access="ReadOnly" />
   <MemorySegment name="RAM" start="0x20000000" size="0x00008000" access="Read/Write" />
 </root>
diff --git a/hw/bsp/metro_m0_express/board_metro_m0_express.c b/hw/bsp/metro_m0_express/board_metro_m0_express.c
index 0838dd2a..6599c134 100644
--- a/hw/bsp/metro_m0_express/board_metro_m0_express.c
+++ b/hw/bsp/metro_m0_express/board_metro_m0_express.c
@@ -36,12 +36,71 @@
 */
 /**************************************************************************/
 
+#include "bsp/board.h"
+
+#include "sam.h"
+#include "hal/include/hal_gpio.h"
+#include "hal/include/hal_init.h"
+#include "peripheral_clk_config.h"
+
+
 //--------------------------------------------------------------------+
 // MACRO TYPEDEF CONSTANT ENUM DECLARATION
 //--------------------------------------------------------------------+
-
+#define LED_STATE_ON  1
 
 void board_init(void)
 {
+  //init_mcu();
 
+  gpio_set_pin_direction(BOARD_LED0, GPIO_DIRECTION_OUT);
+  gpio_set_pin_level(BOARD_LED0, 1-LED_STATE_ON);
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+  // Tick init
+  SysTick_Config(SystemCoreClock/1000);
+#endif
+
+#if 0
+  /* USB Clock init
+   * The USB module requires a GCLK_USB of 48 MHz ~ 0.25% clock
+   * for low speed and full speed operation. */
+  hri_gclk_write_PCHCTRL_reg(GCLK, USB_GCLK_ID, CONF_GCLK_USB_SRC | GCLK_PCHCTRL_CHEN);
+  hri_mclk_set_AHBMASK_USB_bit(MCLK);
+  hri_mclk_set_APBBMASK_USB_bit(MCLK);
+
+  // USB Pin Init
+  gpio_set_pin_direction(PIN_PA24, GPIO_DIRECTION_OUT);
+  gpio_set_pin_level(PIN_PA24, false);
+  gpio_set_pin_pull_mode(PIN_PA24, GPIO_PULL_OFF);
+  gpio_set_pin_direction(PIN_PA25, GPIO_DIRECTION_OUT);
+  gpio_set_pin_level(PIN_PA25, false);
+  gpio_set_pin_pull_mode(PIN_PA25, GPIO_PULL_OFF);
+
+  gpio_set_pin_function(PIN_PA24, PINMUX_PA24H_USB_DM);
+  gpio_set_pin_function(PIN_PA25, PINMUX_PA25H_USB_DP);
+#endif
 }
+
+void board_led_control(uint32_t led_id, bool state)
+{
+  gpio_set_pin_level(led_id, state ? LED_STATE_ON : (1-LED_STATE_ON));
+}
+
+
+/*------------------------------------------------------------------*/
+/* TUSB HAL MILLISECOND
+ *------------------------------------------------------------------*/
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t tusb_hal_millis(void)
+{
+  return board_tick2ms(system_ticks);
+}
+#endif
\ No newline at end of file
diff --git a/hw/bsp/metro_m0_express/board_metro_m0_express.h b/hw/bsp/metro_m0_express/board_metro_m0_express.h
index 4325514e..b727d144 100644
--- a/hw/bsp/metro_m0_express/board_metro_m0_express.h
+++ b/hw/bsp/metro_m0_express/board_metro_m0_express.h
@@ -43,7 +43,7 @@
 #endif
 
 #define BOARD_LED_NUM   1
-#define BOARD_LED0      13
+#define BOARD_LED0      17
 
 #ifdef __cplusplus
  }