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-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.mk10
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/atsamd21_xpro/samd21j18a_flash.ld144
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.mk9
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/circuitplayground_express/circuitplayground_express.ld146
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/feather_m0_express/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/feather_m0_express/board.mk9
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/feather_m0_express/feather_m0_express.ld146
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.mk9
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/itsybitsy_m0/itsybitsy_m0.ld146
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/luna_d21/board.h46
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/luna_d21/board.mk11
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/luna_d21/samd21g18a_flash.ld144
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/metro_m0_express/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/metro_m0_express/board.mk9
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/metro_m0_express/metro_m0_express.ld146
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.h50
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.mk9
-rwxr-xr-xtinyusb/hw/bsp/samd21/boards/seeeduino_xiao/seeeduino_xiao.ld146
21 files changed, 1430 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.h b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.h
new file mode 100755
index 00000000..a3e03997
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN (32 + 30) // PB30
+#define LED_STATE_ON 0
+
+// Button
+#define BUTTON_PIN (0 + 15) // PA15
+#define BUTTON_STATE_ACTIVE 0
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.mk b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.mk
new file mode 100755
index 00000000..5cd82735
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/board.mk
@@ -0,0 +1,10 @@
+CFLAGS += -D__SAMD21J18A__
+
+# All source paths should be relative to the top level.
+LD_FILE = $(BOARD_PATH)/samd21j18a_flash.ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21J18
+
+# flash using jlink
+flash: flash-jlink
diff --git a/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/samd21j18a_flash.ld b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/samd21j18a_flash.ld
new file mode 100755
index 00000000..e2f93416
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/atsamd21_xpro/samd21j18a_flash.ld
@@ -0,0 +1,144 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21J18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.h b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.h
new file mode 100755
index 00000000..2d7da1c0
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN 17
+#define LED_STATE_ON 1
+
+// Button
+#define BUTTON_PIN 28
+#define BUTTON_STATE_ACTIVE 1
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.mk b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.mk
new file mode 100755
index 00000000..bb426cda
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/board.mk
@@ -0,0 +1,9 @@
+CFLAGS += -D__SAMD21G18A__
+
+# All source paths should be relative to the top level.
+LD_FILE = $(BOARD_PATH)/$(BOARD).ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+flash: flash-bossac
diff --git a/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/circuitplayground_express.ld b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/circuitplayground_express.ld
new file mode 100755
index 00000000..f0c93340
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/circuitplayground_express/circuitplayground_express.ld
@@ -0,0 +1,146 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+ENTRY(Reset_Handler)
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.h b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.h
new file mode 100755
index 00000000..b9292b9a
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN 17
+#define LED_STATE_ON 1
+
+// Button
+#define BUTTON_PIN 15
+#define BUTTON_STATE_ACTIVE 0
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.mk b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.mk
new file mode 100755
index 00000000..bb426cda
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/board.mk
@@ -0,0 +1,9 @@
+CFLAGS += -D__SAMD21G18A__
+
+# All source paths should be relative to the top level.
+LD_FILE = $(BOARD_PATH)/$(BOARD).ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+flash: flash-bossac
diff --git a/tinyusb/hw/bsp/samd21/boards/feather_m0_express/feather_m0_express.ld b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/feather_m0_express.ld
new file mode 100755
index 00000000..f0c93340
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/feather_m0_express/feather_m0_express.ld
@@ -0,0 +1,146 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+ENTRY(Reset_Handler)
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.h b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.h
new file mode 100755
index 00000000..177fb695
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN 17
+#define LED_STATE_ON 1
+
+// Button
+#define BUTTON_PIN 21
+#define BUTTON_STATE_ACTIVE 0
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.mk b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.mk
new file mode 100755
index 00000000..bb426cda
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/board.mk
@@ -0,0 +1,9 @@
+CFLAGS += -D__SAMD21G18A__
+
+# All source paths should be relative to the top level.
+LD_FILE = $(BOARD_PATH)/$(BOARD).ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+flash: flash-bossac
diff --git a/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/itsybitsy_m0.ld b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/itsybitsy_m0.ld
new file mode 100755
index 00000000..f0c93340
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/itsybitsy_m0/itsybitsy_m0.ld
@@ -0,0 +1,146 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+ENTRY(Reset_Handler)
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/luna_d21/board.h b/tinyusb/hw/bsp/samd21/boards/luna_d21/board.h
new file mode 100755
index 00000000..2e0a2a60
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/luna_d21/board.h
@@ -0,0 +1,46 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN PIN_PA22
+#define LED_STATE_ON 1
+
+// Button
+#define BUTTON_PIN PIN_PB22
+#define BUTTON_STATE_ACTIVE 0
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/luna_d21/board.mk b/tinyusb/hw/bsp/samd21/boards/luna_d21/board.mk
new file mode 100755
index 00000000..5beb5e02
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/luna_d21/board.mk
@@ -0,0 +1,11 @@
+CFLAGS += -D__SAMD21G18A__
+
+LD_FILE = $(BOARD_PATH)/samd21g18a_flash.ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+# flash using dfu-util
+flash: $(BUILD)/$(PROJECT).bin
+ dfu-util -a 0 -d 1d50:615c -D $< || dfu-util -a 0 -d 16d0:05a5 -D $<
+
diff --git a/tinyusb/hw/bsp/samd21/boards/luna_d21/samd21g18a_flash.ld b/tinyusb/hw/bsp/samd21/boards/luna_d21/samd21g18a_flash.ld
new file mode 100755
index 00000000..15859303
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/luna_d21/samd21g18a_flash.ld
@@ -0,0 +1,144 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 4K, LENGTH = 0x00040000 - 4K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.h b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.h
new file mode 100755
index 00000000..b9292b9a
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN 17
+#define LED_STATE_ON 1
+
+// Button
+#define BUTTON_PIN 15
+#define BUTTON_STATE_ACTIVE 0
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.mk b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.mk
new file mode 100755
index 00000000..bb426cda
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/board.mk
@@ -0,0 +1,9 @@
+CFLAGS += -D__SAMD21G18A__
+
+# All source paths should be relative to the top level.
+LD_FILE = $(BOARD_PATH)/$(BOARD).ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+flash: flash-bossac
diff --git a/tinyusb/hw/bsp/samd21/boards/metro_m0_express/metro_m0_express.ld b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/metro_m0_express.ld
new file mode 100755
index 00000000..f0c93340
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/metro_m0_express/metro_m0_express.ld
@@ -0,0 +1,146 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+ENTRY(Reset_Handler)
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}
diff --git a/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.h b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.h
new file mode 100755
index 00000000..0d1e9cef
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.h
@@ -0,0 +1,50 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// LED
+#define LED_PIN 17
+#define LED_STATE_ON 0
+
+// Button
+#define BUTTON_PIN 9 // PA4 pin D1 on seed input
+#define BUTTON_STATE_ACTIVE 0
+
+// UART
+#define UART_RX_PIN 4
+#define UART_TX_PIN 5
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.mk b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.mk
new file mode 100755
index 00000000..54591b3a
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/board.mk
@@ -0,0 +1,9 @@
+CFLAGS += -D__SAMD21G18A__
+
+LD_FILE = $(BOARD_PATH)/$(BOARD).ld
+
+# For flash-jlink target
+JLINK_DEVICE = ATSAMD21G18
+
+# flash using jlink
+flash: flash-jlink
diff --git a/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/seeeduino_xiao.ld b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/seeeduino_xiao.ld
new file mode 100755
index 00000000..cf11c4c3
--- /dev/null
+++ b/tinyusb/hw/bsp/samd21/boards/seeeduino_xiao/seeeduino_xiao.ld
@@ -0,0 +1,146 @@
+/**
+ * \file
+ *
+ * \brief Linker script for running in internal FLASH on the SAMD21G18A
+ *
+ * Copyright (c) 2017 Microchip Technology Inc.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the Licence at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * \asf_license_stop
+ *
+ */
+
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SEARCH_DIR(.)
+
+/* Memory Spaces Definitions */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000 + 8K, LENGTH = 0x00040000 - 8K /* 8K offset to preserve bootloader */
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* The stack size used by the application. NOTE: you need to adjust according to your application. */
+STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
+
+ENTRY(Reset_Handler)
+
+/* Section Definitions */
+SECTIONS
+{
+ .text :
+ {
+ . = ALIGN(4);
+ _sfixed = .;
+ KEEP(*(.vectors .vectors.*))
+ *(.text .text.* .gnu.linkonce.t.*)
+ *(.glue_7t) *(.glue_7)
+ *(.rodata .rodata* .gnu.linkonce.r.*)
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+ /* Support C constructors, and C destructors in both user code
+ and the C library. This also provides support for C++ code. */
+ . = ALIGN(4);
+ KEEP(*(.init))
+ . = ALIGN(4);
+ __preinit_array_start = .;
+ KEEP (*(.preinit_array))
+ __preinit_array_end = .;
+
+ . = ALIGN(4);
+ __init_array_start = .;
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ __init_array_end = .;
+
+ . = ALIGN(4);
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*crtend.o(.ctors))
+
+ . = ALIGN(4);
+ KEEP(*(.fini))
+
+ . = ALIGN(4);
+ __fini_array_start = .;
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ __fini_array_end = .;
+
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*crtend.o(.dtors))
+
+ . = ALIGN(4);
+ _efixed = .; /* End of text section */
+ } > rom
+
+ /* .ARM.exidx is sorted, so has to go in its own output section. */
+ PROVIDE_HIDDEN (__exidx_start = .);
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > rom
+ PROVIDE_HIDDEN (__exidx_end = .);
+
+ . = ALIGN(4);
+ _etext = .;
+
+ .relocate : AT (_etext)
+ {
+ . = ALIGN(4);
+ _srelocate = .;
+ *(.ramfunc .ramfunc.*);
+ *(.data .data.*);
+ . = ALIGN(4);
+ _erelocate = .;
+ } > ram
+
+ /* .bss section which is used for uninitialized data */
+ .bss (NOLOAD) :
+ {
+ . = ALIGN(4);
+ _sbss = . ;
+ _szero = .;
+ *(.bss .bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ _ebss = . ;
+ _ezero = .;
+ end = .;
+ } > ram
+
+ /* stack section */
+ .stack (NOLOAD):
+ {
+ . = ALIGN(8);
+ _sstack = .;
+ . = . + STACK_SIZE;
+ . = ALIGN(8);
+ _estack = .;
+ } > ram
+
+ . = ALIGN(4);
+ _end = . ;
+}