diff --git a/boards.txt b/boards.txt
index 950f69edc..728b0287d 100644
--- a/boards.txt
+++ b/boards.txt
@@ -95,3 +95,31 @@ adafruit_feather_m0.bootloader.file=feather/samd21_sam_ba.bin
#adafruit_metro_m0.build.pid=0x8013
#adafruit_metro_m0.bootloader.tool=openocd
#adafruit_metro_m0.bootloader.file=metro/samd21_sam_ba.bin
+
+# Atmel Xplained SAMR21G18A (Progamming Port)
+# ---------------------------------------
+xplained_samr21g18a_edbg.name=Atmel Xplained SAMR21G18A (Programming Port)
+xplained_samr21g18a_edbg.vid.0=0x03eb
+xplained_samr21g18a_edbg.pid.0=0x2157
+
+xplained_samr21g18a_edbg.upload.tool=openocd
+xplained_samr21g18a_edbg.upload.protocol=sam-ba
+xplained_samr21g18a_edbg.upload.maximum_size=262144
+xplained_samr21g18a_edbg.upload.use_1200bps_touch=false
+xplained_samr21g18a_edbg.upload.wait_for_upload_port=false
+xplained_samr21g18a_edbg.upload.native_usb=false
+xplained_samr21g18a_edbg.build.mcu=cortex-m0plus
+xplained_samr21g18a_edbg.build.f_cpu=48000000L
+xplained_samr21g18a_edbg.build.usb_product="Test"
+xplained_samr21g18a_edbg.build.usb_manufacturer="Test LLC"
+xplained_samr21g18a_edbg.build.board=SAMD_ZERO
+xplained_samr21g18a_edbg.build.core=arduino
+xplained_samr21g18a_edbg.build.extra_flags=-D__SAMD21G18A__ {build.usb_flags}
+xplained_samr21g18a_edbg.build.ldscript=linker_scripts/gcc/flash_with_bootloader.ld
+xplained_samr21g18a_edbg.build.openocdscript=openocd_scripts/arduino_zero.cfg
+xplained_samr21g18a_edbg.build.variant=xplained_samr21g18a
+xplained_samr21g18a_edbg.build.variant_system_lib=
+xplained_samr21g18a_edbg.build.vid=0x2341
+xplained_samr21g18a_edbg.build.pid=0x804d
+xplained_samr21g18a_edbg.bootloader.tool=openocd
+xplained_samr21g18a_edbg.bootloader.file=zero/samd21_sam_ba.bin
diff --git a/cores/arduino/USB/CDC.cpp b/cores/arduino/USB/CDC.cpp
index b7690627b..5a111dce9 100644
--- a/cores/arduino/USB/CDC.cpp
+++ b/cores/arduino/USB/CDC.cpp
@@ -345,6 +345,6 @@ bool Serial_::rts() {
return _usbLineInfo.lineState & 0x2;
}
-Serial_ Serial(USBDevice);
+Serial_ SerialUSB(USBDevice);
#endif
diff --git a/cores/arduino/USB/USBAPI.h b/cores/arduino/USB/USBAPI.h
index a27a115e9..1de826608 100644
--- a/cores/arduino/USB/USBAPI.h
+++ b/cores/arduino/USB/USBAPI.h
@@ -170,7 +170,7 @@ class Serial_ : public Stream
USBDeviceClass &usb;
RingBuffer *_cdc_rx_buffer;
};
-extern Serial_ Serial;
+extern Serial_ SerialUSB;
//================================================================================
//================================================================================
diff --git a/cores/arduino/USB/USBCore.cpp b/cores/arduino/USB/USBCore.cpp
index 6b303967c..89d1022a7 100644
--- a/cores/arduino/USB/USBCore.cpp
+++ b/cores/arduino/USB/USBCore.cpp
@@ -267,7 +267,7 @@ void USBDeviceClass::handleEndpoint(uint8_t ep)
// Handle received bytes
if (available(CDC_ENDPOINT_OUT))
- Serial.accept();
+ SerialUSB.accept();
}
if (ep == CDC_ENDPOINT_IN)
{
diff --git a/variants/xplained_samr21g18a/debug_scripts/variant.gdb b/variants/xplained_samr21g18a/debug_scripts/variant.gdb
new file mode 100644
index 000000000..3c37ffde2
--- /dev/null
+++ b/variants/xplained_samr21g18a/debug_scripts/variant.gdb
@@ -0,0 +1,31 @@
+#
+# Arduino Zero OpenOCD script.
+#
+# Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+
+# Define 'reset' command
+define reset
+
+info reg
+
+break main
+
+# End of 'reset' command
+end
+
+target remote | openocd -c "interface cmsis-dap" -c "set CHIPNAME at91samd21g18" -f target/at91samdXX.cfg -c "gdb_port pipe; log_output openocd.log"
diff --git a/variants/xplained_samr21g18a/linker_scripts/gcc/flash_with_bootloader.ld b/variants/xplained_samr21g18a/linker_scripts/gcc/flash_with_bootloader.ld
new file mode 100644
index 000000000..4475f9511
--- /dev/null
+++ b/variants/xplained_samr21g18a/linker_scripts/gcc/flash_with_bootloader.ld
@@ -0,0 +1,211 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+/* Linker script to configure memory regions.
+ * Need modifying for a specific board.
+ * FLASH.ORIGIN: starting address of flash
+ * FLASH.LENGTH: length of flash
+ * RAM.ORIGIN: starting address of RAM bank 0
+ * RAM.LENGTH: length of RAM bank 0
+ */
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x00000000+0x2000, LENGTH = 0x00040000-0x2000 /* First 8KB used by bootloader */
+ RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* Linker script to place sections and symbol values. Should be used together
+ * with other linker script that defines memory regions FLASH and RAM.
+ * It references following symbols, which must be defined in code:
+ * Reset_Handler : Entry of reset handler
+ *
+ * It defines following symbols, which code can use without definition:
+ * __exidx_start
+ * __exidx_end
+ * __copy_table_start__
+ * __copy_table_end__
+ * __zero_table_start__
+ * __zero_table_end__
+ * __etext
+ * __data_start__
+ * __preinit_array_start
+ * __preinit_array_end
+ * __init_array_start
+ * __init_array_end
+ * __fini_array_start
+ * __fini_array_end
+ * __data_end__
+ * __bss_start__
+ * __bss_end__
+ * __end__
+ * end
+ * __HeapLimit
+ * __StackLimit
+ * __StackTop
+ * __stack
+ */
+ENTRY(Reset_Handler)
+
+SECTIONS
+{
+ .text :
+ {
+ KEEP(*(.isr_vector))
+ *(.text*)
+
+ KEEP(*(.init))
+ KEEP(*(.fini))
+
+ /* .ctors */
+ *crtbegin.o(.ctors)
+ *crtbegin?.o(.ctors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+ *(SORT(.ctors.*))
+ *(.ctors)
+
+ /* .dtors */
+ *crtbegin.o(.dtors)
+ *crtbegin?.o(.dtors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ *(SORT(.dtors.*))
+ *(.dtors)
+
+ *(.rodata*)
+
+ KEEP(*(.eh_frame*))
+ } > FLASH
+
+ .ARM.extab :
+ {
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+ } > FLASH
+
+ __exidx_start = .;
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > FLASH
+ __exidx_end = .;
+
+ /* To copy multiple ROM to RAM sections,
+ * uncomment .copy.table section and,
+ * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
+ /*
+ .copy.table :
+ {
+ . = ALIGN(4);
+ __copy_table_start__ = .;
+ LONG (__etext)
+ LONG (__data_start__)
+ LONG (__data_end__ - __data_start__)
+ LONG (__etext2)
+ LONG (__data2_start__)
+ LONG (__data2_end__ - __data2_start__)
+ __copy_table_end__ = .;
+ } > FLASH
+ */
+
+ /* To clear multiple BSS sections,
+ * uncomment .zero.table section and,
+ * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
+ /*
+ .zero.table :
+ {
+ . = ALIGN(4);
+ __zero_table_start__ = .;
+ LONG (__bss_start__)
+ LONG (__bss_end__ - __bss_start__)
+ LONG (__bss2_start__)
+ LONG (__bss2_end__ - __bss2_start__)
+ __zero_table_end__ = .;
+ } > FLASH
+ */
+
+ __etext = .;
+
+ .data : AT (__etext)
+ {
+ __data_start__ = .;
+ *(vtable)
+ *(.data*)
+
+ . = ALIGN(4);
+ /* preinit data */
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP(*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+
+ . = ALIGN(4);
+ /* init data */
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP(*(SORT(.init_array.*)))
+ KEEP(*(.init_array))
+ PROVIDE_HIDDEN (__init_array_end = .);
+
+
+ . = ALIGN(4);
+ /* finit data */
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP(*(SORT(.fini_array.*)))
+ KEEP(*(.fini_array))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+
+ KEEP(*(.jcr*))
+ . = ALIGN(4);
+ /* All data end */
+ __data_end__ = .;
+
+ } > RAM
+
+ .bss :
+ {
+ . = ALIGN(4);
+ __bss_start__ = .;
+ *(.bss*)
+ *(COMMON)
+ . = ALIGN(4);
+ __bss_end__ = .;
+ } > RAM
+
+ .heap (COPY):
+ {
+ __end__ = .;
+ PROVIDE(end = .);
+ *(.heap*)
+ __HeapLimit = .;
+ } > RAM
+
+ /* .stack_dummy section doesn't contains any symbols. It is only
+ * used for linker to calculate size of stack sections, and assign
+ * values to stack symbols later */
+ .stack_dummy (COPY):
+ {
+ *(.stack*)
+ } > RAM
+
+ /* Set stack top to end of RAM, and stack limit move down by
+ * size of stack_dummy section */
+ __StackTop = ORIGIN(RAM) + LENGTH(RAM);
+ __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+ PROVIDE(__stack = __StackTop);
+
+ __ram_end__ = ORIGIN(RAM) + LENGTH(RAM) -1 ;
+
+ /* Check if data + heap + stack exceeds RAM limit */
+ ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+}
diff --git a/variants/xplained_samr21g18a/linker_scripts/gcc/flash_without_bootloader.ld b/variants/xplained_samr21g18a/linker_scripts/gcc/flash_without_bootloader.ld
new file mode 100644
index 000000000..0162f0774
--- /dev/null
+++ b/variants/xplained_samr21g18a/linker_scripts/gcc/flash_without_bootloader.ld
@@ -0,0 +1,212 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+/* Linker script to configure memory regions.
+ * Need modifying for a specific board.
+ * FLASH.ORIGIN: starting address of flash
+ * FLASH.LENGTH: length of flash
+ * RAM.ORIGIN: starting address of RAM bank 0
+ * RAM.LENGTH: length of RAM bank 0
+ */
+MEMORY
+{
+ FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
+ RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
+}
+
+/* Linker script to place sections and symbol values. Should be used together
+ * with other linker script that defines memory regions FLASH and RAM.
+ * It references following symbols, which must be defined in code:
+ * Reset_Handler : Entry of reset handler
+ *
+ * It defines following symbols, which code can use without definition:
+ * __exidx_start
+ * __exidx_end
+ * __copy_table_start__
+ * __copy_table_end__
+ * __zero_table_start__
+ * __zero_table_end__
+ * __etext
+ * __data_start__
+ * __preinit_array_start
+ * __preinit_array_end
+ * __init_array_start
+ * __init_array_end
+ * __fini_array_start
+ * __fini_array_end
+ * __data_end__
+ * __bss_start__
+ * __bss_end__
+ * __end__
+ * end
+ * __HeapLimit
+ * __StackLimit
+ * __StackTop
+ * __stack
+ * __ram_end__
+ */
+ENTRY(Reset_Handler)
+
+SECTIONS
+{
+ .text :
+ {
+ KEEP(*(.isr_vector))
+ *(.text*)
+
+ KEEP(*(.init))
+ KEEP(*(.fini))
+
+ /* .ctors */
+ *crtbegin.o(.ctors)
+ *crtbegin?.o(.ctors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+ *(SORT(.ctors.*))
+ *(.ctors)
+
+ /* .dtors */
+ *crtbegin.o(.dtors)
+ *crtbegin?.o(.dtors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ *(SORT(.dtors.*))
+ *(.dtors)
+
+ *(.rodata*)
+
+ KEEP(*(.eh_frame*))
+ } > FLASH
+
+ .ARM.extab :
+ {
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+ } > FLASH
+
+ __exidx_start = .;
+ .ARM.exidx :
+ {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } > FLASH
+ __exidx_end = .;
+
+ /* To copy multiple ROM to RAM sections,
+ * uncomment .copy.table section and,
+ * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
+ /*
+ .copy.table :
+ {
+ . = ALIGN(4);
+ __copy_table_start__ = .;
+ LONG (__etext)
+ LONG (__data_start__)
+ LONG (__data_end__ - __data_start__)
+ LONG (__etext2)
+ LONG (__data2_start__)
+ LONG (__data2_end__ - __data2_start__)
+ __copy_table_end__ = .;
+ } > FLASH
+ */
+
+ /* To clear multiple BSS sections,
+ * uncomment .zero.table section and,
+ * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
+ /*
+ .zero.table :
+ {
+ . = ALIGN(4);
+ __zero_table_start__ = .;
+ LONG (__bss_start__)
+ LONG (__bss_end__ - __bss_start__)
+ LONG (__bss2_start__)
+ LONG (__bss2_end__ - __bss2_start__)
+ __zero_table_end__ = .;
+ } > FLASH
+ */
+
+ __etext = .;
+
+ .data : AT (__etext)
+ {
+ __data_start__ = .;
+ *(vtable)
+ *(.data*)
+
+ . = ALIGN(4);
+ /* preinit data */
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP(*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+
+ . = ALIGN(4);
+ /* init data */
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP(*(SORT(.init_array.*)))
+ KEEP(*(.init_array))
+ PROVIDE_HIDDEN (__init_array_end = .);
+
+
+ . = ALIGN(4);
+ /* finit data */
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP(*(SORT(.fini_array.*)))
+ KEEP(*(.fini_array))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+
+ KEEP(*(.jcr*))
+ . = ALIGN(4);
+ /* All data end */
+ __data_end__ = .;
+
+ } > RAM
+
+ .bss :
+ {
+ . = ALIGN(4);
+ __bss_start__ = .;
+ *(.bss*)
+ *(COMMON)
+ . = ALIGN(4);
+ __bss_end__ = .;
+ } > RAM
+
+ .heap (COPY):
+ {
+ __end__ = .;
+ PROVIDE(end = .);
+ *(.heap*)
+ __HeapLimit = .;
+ } > RAM
+
+ /* .stack_dummy section doesn't contains any symbols. It is only
+ * used for linker to calculate size of stack sections, and assign
+ * values to stack symbols later */
+ .stack_dummy (COPY):
+ {
+ *(.stack*)
+ } > RAM
+
+ /* Set stack top to end of RAM, and stack limit move down by
+ * size of stack_dummy section */
+ __StackTop = ORIGIN(RAM) + LENGTH(RAM) ;
+ __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+ PROVIDE(__stack = __StackTop);
+
+ __ram_end__ = ORIGIN(RAM) + LENGTH(RAM) -1 ;
+
+ /* Check if data + heap + stack exceeds RAM limit */
+ ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+}
diff --git a/variants/xplained_samr21g18a/openocd_scripts/arduino_zero.cfg b/variants/xplained_samr21g18a/openocd_scripts/arduino_zero.cfg
new file mode 100644
index 000000000..36c65c32d
--- /dev/null
+++ b/variants/xplained_samr21g18a/openocd_scripts/arduino_zero.cfg
@@ -0,0 +1,30 @@
+#
+# Arduino Zero OpenOCD script.
+#
+# Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+
+source [find interface/cmsis-dap.cfg]
+
+# chip name
+set CHIPNAME at91samd21g18
+set ENDIAN little
+
+# choose a port here
+set telnet_port 0
+
+source [find target/at91samdXX.cfg]
diff --git a/variants/xplained_samr21g18a/pins_arduino.h b/variants/xplained_samr21g18a/pins_arduino.h
new file mode 100644
index 000000000..db0e40c3d
--- /dev/null
+++ b/variants/xplained_samr21g18a/pins_arduino.h
@@ -0,0 +1,21 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+// API compatibility
+#include "variant.h"
+
diff --git a/variants/xplained_samr21g18a/variant.cpp b/variants/xplained_samr21g18a/variant.cpp
new file mode 100644
index 000000000..173bd8f8a
--- /dev/null
+++ b/variants/xplained_samr21g18a/variant.cpp
@@ -0,0 +1,238 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+/*
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * + Pin number + ZERO Board pin | PIN | Label/Name | Comments (* is for default peripheral in use)
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | Digital Low | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 0 | 0 -> RX | PA11 | | EIC/EXTINT[11] ADC/AIN[19] PTC/X[3] *SERCOM0/PAD[3] SERCOM2/PAD[3] TCC0/WO[3] TCC1/WO[1]
+ * | 1 | 1 <- TX | PA10 | | EIC/EXTINT[10] ADC/AIN[18] PTC/X[2] *SERCOM0/PAD[2] TCC0/WO[2] TCC1/WO[0]
+ * | 2 | 2 | PA14 | | EIC/EXTINT[14] SERCOM2/PAD[2] SERCOM4/PAD[2] TC3/WO[0] TCC0/WO[4]
+ * | 3 | ~3 | PA09 | | EIC/EXTINT[9] ADC/AIN[17] PTC/X[1] SERCOM0/PAD[1] SERCOM2/PAD[1] *TCC0/WO[1] TCC1/WO[3]
+ * | 4 | ~4 | PA08 | | EIC/NMI ADC/AIN[16] PTC/X[0] SERCOM0/PAD[0] SERCOM2/PAD[0] *TCC0/WO[0] TCC1/WO[2]
+ * | 5 | ~5 | PA15 | | EIC/EXTINT[15] SERCOM2/PAD[3] SERCOM4/PAD[3] *TC3/WO[1] TCC0/WO[5]
+ * | 6 | ~6 | PA20 | | EIC/EXTINT[4] PTC/X[8] SERCOM5/PAD[2] SERCOM3/PAD[2] *TCC0/WO[6]
+ * | 7 | 7 | PA21 | | EIC/EXTINT[5] PTC/X[9] SERCOM5/PAD[3] SERCOM3/PAD[3] TCC0/WO[7]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | Digital High | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 8 | ~8 | PA06 | | EIC/EXTINT[6] ADC/AIN[6] AC/AIN[2] PTC/Y[4] SERCOM0/PAD[2] *TCC1/WO[0]
+ * | 9 | ~9 | PA07 | | EIC/EXTINT[7] ADC/AIN[7] AC/AIN[3] PTC/Y[5] SERCOM0/PAD[3] *TCC1/WO[1]
+ * | 10 | ~10 | PA18 | | EIC/EXTINT[2] PTC/X[6] +SERCOM1/PAD[2] SERCOM3/PAD[2] *TC3/WO[0] TCC0/WO[2]
+ * | 11 | ~11 | PA16 | | EIC/EXTINT[0] PTC/X[4] +SERCOM1/PAD[0] SERCOM3/PAD[0] *TCC2/WO[0] TCC0/WO[6]
+ * | 12 | ~12 | PA19 | | EIC/EXTINT[3] PTC/X[7] +SERCOM1/PAD[3] SERCOM3/PAD[3] TC3/WO[1] *TCC0/WO[3]
+ * | 13 | ~13 | PA17 | LED | EIC/EXTINT[1] PTC/X[5] +SERCOM1/PAD[1] SERCOM3/PAD[1] *TCC2/WO[1] TCC0/WO[7]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | Analog Connector | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 14 | A0 | PA02 | A0 | EIC/EXTINT[2] *ADC/AIN[0] DAC/VOUT PTC/Y[0]
+ * | 15 | A1 | PB08 | A1 | EIC/EXTINT[8] *ADC/AIN[2] PTC/Y[14] SERCOM4/PAD[0] TC4/WO[0]
+ * | 16 | A2 | PB09 | A2 | EIC/EXTINT[9] *ADC/AIN[3] PTC/Y[15] SERCOM4/PAD[1] TC4/WO[1]
+ * | 17 | A3 | PA04 | A3 | EIC/EXTINT[4] *ADC/AIN[4] AC/AIN[0] PTC/Y[2] SERCOM0/PAD[0] TCC0/WO[0]
+ * | 18 | A4 | PA05 | A4 | EIC/EXTINT[5] *ADC/AIN[5] AC/AIN[1] PTC/Y[5] SERCOM0/PAD[1] TCC0/WO[1]
+ * | 19 | A5 | PB02 | A5 | EIC/EXTINT[2] *ADC/AIN[10] PTC/Y[8] SERCOM5/PAD[0]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | Wire | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 20 | SDA | PA22 | SDA | EIC/EXTINT[6] PTC/X[10] *SERCOM3/PAD[0] SERCOM5/PAD[0] TC4/WO[0] TCC0/WO[4]
+ * | 21 | SCL | PA23 | SCL | EIC/EXTINT[7] PTC/X[11] *SERCOM3/PAD[1] SERCOM5/PAD[1] TC4/WO[1] TCC0/WO[5]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | |SPI (Legacy ICSP) | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 22 | 1 | PA12 | MISO | EIC/EXTINT[12] SERCOM2/PAD[0] *SERCOM4/PAD[0] TCC2/WO[0] TCC0/WO[6]
+ * | | 2 | | 5V0 |
+ * | 23 | 4 | PB10 | MOSI | EIC/EXTINT[10] *SERCOM4/PAD[2] TC5/WO[0] TCC0/WO[4]
+ * | 24 | 3 | PB11 | SCK | EIC/EXTINT[11] *SERCOM4/PAD[3] TC5/WO[1] TCC0/WO[5]
+ * | | 5 | | RESET |
+ * | | 6 | | GND |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | LEDs | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 25 | | PB03 | RX |
+ * | 26 | | PA27 | TX |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | USB | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 27 | | PA28 | USB_HOST_ENABLE | EIC/EXTINT[8]
+ * | 28 | | PA24 | USB_NEGATIVE | *USB/DM
+ * | 29 | | PA25 | USB_POSITIVE | *USB/DP
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | EDBG | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 30 | | PB22 | EDBG_UART TX | *SERCOM5/PAD[2]
+ * | 31 | | PB23 | EDBG_UART RX | *SERCOM5/PAD[3]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 32 | | PA22 | EDBG_SDA | Pin 20 (SDA)
+ * | 33 | | PA23 | EDBG_SCL | Pin 21 (SCL)
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 34 | | PA19 | EDBG_MISO | EIC/EXTINT[3] *SERCOM1/PAD[3] SERCOM3/PAD[3] TC3/WO[1] TCC0/WO[3]
+ * | 35 | | PA16 | EDBG_MOSI | EIC/EXTINT[0] *SERCOM1/PAD[0] SERCOM3/PAD[0] TCC2/WO[0] TCC0/WO[6]
+ * | 36 | | PA18 | EDBG_SS | EIC/EXTINT[2] *SERCOM1/PAD[2] SERCOM3/PAD[2] TC3/WO[0] TCC0/WO[2]
+ * | 37 | | PA17 | EDBG_SCK | EIC/EXTINT[1] *SERCOM1/PAD[1] SERCOM3/PAD[1] TCC2/WO[1] TCC0/WO[7]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | 38 | ATN | PA13 | EDBG_GPIO0 | EIC/EXTINT[13] SERCOM2/PAD[1] SERCOM4/PAD[1] *TCC2/WO[1] TCC0/WO[7]
+ * | 39 | | PA21 | EDBG_GPIO1 | Pin 7
+ * | 40 | | PA06 | EDBG_GPIO2 | Pin 8
+ * | 41 | | PA07 | EDBG_GPIO3 | Pin 9
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | GND | | |
+ * | 42 | AREF | PA03 | | EIC/EXTINT[3] *[ADC|DAC]/VREFA ADC/AIN[1] PTC/Y[1]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | |32.768KHz Crystal | | |
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ * | | | PA00 | XIN32 | EIC/EXTINT[0] SERCOM1/PAD[0] TCC2/WO[0]
+ * | | | PA01 | XOUT32 | EIC/EXTINT[1] SERCOM1/PAD[1] TCC2/WO[1]
+ * +------------+------------------+--------+-----------------+--------------------------------------------------------------------------------------------------------
+ */
+
+
+#include "variant.h"
+
+/*
+ * Pins descriptions
+ */
+const PinDescription g_APinDescription[]=
+{
+ // 0..13 - Digital pins
+ // ----------------------
+ // 0/1 - SERCOM/UART (Serial1)
+ { PORTA, 11, PIO_SERCOM, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_11 }, // RX: SERCOM0/PAD[3]
+ { PORTA, 10, PIO_SERCOM, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_10 }, // TX: SERCOM0/PAD[2]
+
+ // 2..12
+ // Digital Low
+ { PORTA, 14, PIO_DIGITAL, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_14 },
+ { PORTA, 9, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH1, TCC0_CH1, EXTERNAL_INT_9 }, // TCC0/WO[1]
+ { PORTA, 8, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH0, TCC0_CH0, EXTERNAL_INT_NMI }, // TCC0/WO[0]
+ { PORTA, 15, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM3_CH1, TC3_CH1, EXTERNAL_INT_15 }, // TC3/WO[1]
+ { PORTA, 20, PIO_TIMER_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_4 }, // TCC0/WO[6]
+ { PORTA, 21, PIO_DIGITAL, (PIN_ATTR_DIGITAL), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_5 },
+
+ // Digital High
+ { PORTA, 6, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM1_CH0, TCC1_CH0, EXTERNAL_INT_6 }, // TCC1/WO[0]
+ { PORTA, 7, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM1_CH1, TCC1_CH1, EXTERNAL_INT_7 }, // TCC1/WO[1]
+ { PORTA, 18, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM3_CH0, TC3_CH0, EXTERNAL_INT_2 }, // TC3/WO[0]
+ { PORTA, 16, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM2_CH0, TCC2_CH0, EXTERNAL_INT_0 }, // TCC2/WO[0]
+ { PORTA, 19, PIO_TIMER_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM0_CH3, TCC0_CH3, EXTERNAL_INT_3 }, // TCC0/WO[3]
+
+ // 13 (LED)
+ { PORTA, 17, PIO_PWM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM2_CH1, NOT_ON_TIMER, EXTERNAL_INT_1 }, // TCC2/WO[1]
+
+ // 14..19 - Analog pins
+ // --------------------
+ { PORTA, 2, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel0, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 }, // ADC/AIN[0]
+ { PORTB, 8, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel2, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_8 }, // ADC/AIN[2]
+ { PORTB, 9, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel3, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_9 }, // ADC/AIN[3]
+
+
+// modified by AKIBA
+ { PORTB, 00, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_0 },
+ { PORTB, 15, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // ADC/AIN[5]
+
+ { PORTB, 2, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel10, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 }, // ADC/AIN[10]
+
+ // 20..21 I2C pins (SDA/SCL and also EDBG:SDA/SCL)
+ // ----------------------
+ { PORTA, 22, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_6 }, // SDA: SERCOM3/PAD[0]
+ { PORTA, 23, PIO_SERCOM, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_7 }, // SCL: SERCOM3/PAD[1]
+
+ // 22..24 - SPI pins (ICSP:MISO,SCK,MOSI)
+ // ----------------------
+ { PORTC, 19, PIO_TIMER_ALT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_12 }, // MISO: SERCOM4/PAD[0]
+ { PORTB, 30, PIO_TIMER_ALT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_10 }, // MOSI: SERCOM4/PAD[2]
+ { PORTC, 18, PIO_TIMER_ALT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_11 }, // SCK: SERCOM4/PAD[3]
+
+ // 25..26 - RX/TX LEDS (PB03/PA27)
+ // --------------------
+ { PORTB, 31, PIO_OUTPUT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // used as output only
+ { PORTA, 27, PIO_OUTPUT, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // used as output only
+
+ // 27..29 - USB
+ // --------------------
+ { PORTA, 28, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB Host enable
+ { PORTA, 24, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB/DM
+ { PORTA, 25, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB/DP
+
+
+ // 30..41 - EDBG
+ // ---------------------
+
+// modified by AKIBA
+ // 30/31 - EDBG/UART
+ { PORTA, 04, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // TX: SERCOM5/PAD[2]
+ { PORTA, 05, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // RX: SERCOM5/PAD[3]
+
+ // 32/33 I2C (SDA/SCL and also EDBG:SDA/SCL)
+ { PORTA, 22, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SDA: SERCOM3/PAD[0]
+ { PORTA, 23, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCL: SERCOM3/PAD[1]
+
+ // 34..37 - EDBG/SPI
+ { PORTA, 19, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM1/PAD[3]
+ { PORTA, 16, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MOSI: SERCOM1/PAD[0]
+ { PORTA, 18, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SS: SERCOM1/PAD[2]
+ { PORTA, 17, PIO_SERCOM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCK: SERCOM1/PAD[1]
+
+ // 38..41 - EDBG/Digital
+ { PORTA, 13, PIO_PWM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM0_CH5, NOT_ON_TIMER, EXTERNAL_INT_13 }, // EIC/EXTINT[13] *TCC2/WO[1] TCC0/WO[7]
+ { PORTA, 21, PIO_PWM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM0_CH7, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // Pin 7
+ { PORTA, 6, PIO_PWM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM1_CH0, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // Pin 8
+ { PORTA, 7, PIO_PWM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM), No_ADC_Channel, PWM1_CH1, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // Pin 9
+
+ // 42 (AREF)
+ { PORTA, 3, PIO_ANALOG, PIN_ATTR_ANALOG, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // DAC/VREFP
+
+ // ----------------------
+ // 43 - Alternate use of A0 (DAC output)
+ { PORTA, 2, PIO_ANALOG, PIN_ATTR_ANALOG, DAC_Channel0, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 }, // DAC/VOUT
+} ;
+
+const void* g_apTCInstances[TCC_INST_NUM+TC_INST_NUM]={ TCC0, TCC1, TCC2, TC3, TC4, TC5 } ;
+
+// Multi-serial objects instantiation
+SERCOM sercom0( SERCOM0 ) ;
+SERCOM sercom1( SERCOM1 ) ;
+SERCOM sercom2( SERCOM2 ) ;
+SERCOM sercom3( SERCOM3 ) ;
+SERCOM sercom4( SERCOM4 ) ;
+SERCOM sercom5( SERCOM5 ) ;
+
+Uart Serial1( &sercom0, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX ) ;
+
+//modified by AKIBA
+Uart Serial( &sercom0, PIN_SERIAL_RX, PIN_SERIAL_TX, PAD_SERIAL_RX, PAD_SERIAL_TX ) ;
+//Uart Serial( &sercom5, PIN_SERIAL_RX, PIN_SERIAL_TX, PAD_SERIAL_RX, PAD_SERIAL_TX ) ;
+
+void SERCOM0_Handler()
+{
+ Serial.IrqHandler();
+}
+/*
+void SERCOM0_Handler()
+{
+ Serial1.IrqHandler();
+}
+
+
+void SERCOM5_Handler()
+{
+ Serial.IrqHandler();
+}
+*/
diff --git a/variants/xplained_samr21g18a/variant.h b/variants/xplained_samr21g18a/variant.h
new file mode 100644
index 000000000..24cc4e534
--- /dev/null
+++ b/variants/xplained_samr21g18a/variant.h
@@ -0,0 +1,214 @@
+/*
+ Copyright (c) 2014-2015 Arduino LLC. All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef _VARIANT_ARDUINO_ZERO_
+#define _VARIANT_ARDUINO_ZERO_
+
+/*----------------------------------------------------------------------------
+ * Definitions
+ *----------------------------------------------------------------------------*/
+
+/** Frequency of the board main oscillator */
+#define VARIANT_MAINOSC (32768ul)
+
+/** Master clock frequency */
+#define VARIANT_MCK (48000000ul)
+
+ #define CHB_AT86RF 1
+ #define CHB_SAMD_ZERO 1
+
+/*----------------------------------------------------------------------------
+ * Headers
+ *----------------------------------------------------------------------------*/
+
+#include "WVariant.h"
+
+#ifdef __cplusplus
+#include "SERCOM.h"
+#include "Uart.h"
+#endif // __cplusplus
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif // __cplusplus
+
+/*----------------------------------------------------------------------------
+ * Pins
+ *----------------------------------------------------------------------------*/
+
+// Number of pins defined in PinDescription array
+#define PINS_COUNT (26u)
+#define NUM_DIGITAL_PINS (14u)
+#define NUM_ANALOG_INPUTS (6u)
+#define NUM_ANALOG_OUTPUTS (1u)
+
+#define digitalPinToPort(P) ( &(PORT->Group[g_APinDescription[P].ulPort]) )
+#define digitalPinToBitMask(P) ( 1 << g_APinDescription[P].ulPin )
+//#define analogInPinToBit(P) ( )
+#define portOutputRegister(port) ( &(port->OUT.reg) )
+#define portInputRegister(port) ( &(port->IN.reg) )
+#define portModeRegister(port) ( &(port->DIR.reg) )
+#define digitalPinHasPWM(P) ( g_APinDescription[P].ulPWMChannel != NOT_ON_PWM || g_APinDescription[P].ulTCChannel != NOT_ON_TIMER )
+
+/*
+ * digitalPinToTimer(..) is AVR-specific and is not defined for SAMD
+ * architecture. If you need to check if a pin supports PWM you must
+ * use digitalPinHasPWM(..).
+ *
+ * https://github.com/arduino/Arduino/issues/1833
+ */
+// #define digitalPinToTimer(P)
+
+// Interrupts
+#define digitalPinToInterrupt(P) ( g_APinDescription[P].ulExtInt )
+
+// LEDs
+#define PIN_LED_13 (13u)
+#define PIN_LED_RXL (25u)
+#define PIN_LED_TXL (26u)
+#define PIN_LED PIN_LED_13
+#define PIN_LED2 PIN_LED_RXL
+#define PIN_LED3 PIN_LED_TXL
+#define LED_BUILTIN PIN_LED_13
+
+/*
+ * Analog pins
+ */
+#define PIN_A0 (14ul)
+#define PIN_A1 (15ul)
+#define PIN_A2 (16ul)
+#define PIN_A3 (17ul)
+#define PIN_A4 (18ul)
+#define PIN_A5 (19ul)
+#define PIN_A6 (8ul)
+#define PIN_A7 (9ul)
+
+static const uint8_t A0 = PIN_A0 ;
+static const uint8_t A1 = PIN_A1 ;
+static const uint8_t A2 = PIN_A2 ;
+static const uint8_t A3 = PIN_A3 ;
+static const uint8_t A4 = PIN_A4 ;
+static const uint8_t A5 = PIN_A5 ;
+#define ADC_RESOLUTION 12
+
+// Other pins
+#define PIN_ATN (38ul)
+static const uint8_t ATN = PIN_ATN;
+
+/*
+ * Serial interfaces
+ */
+// Serial (EDBG)
+#define PIN_SERIAL_RX (31ul)
+#define PIN_SERIAL_TX (30ul)
+
+// modified by AKIBA
+#define PAD_SERIAL_TX (UART_TX_PAD_0)
+#define PAD_SERIAL_RX (SERCOM_RX_PAD_1)
+
+// Serial1
+#define PIN_SERIAL1_RX (0ul)
+#define PIN_SERIAL1_TX (1ul)
+#define PAD_SERIAL1_TX (UART_TX_PAD_2)
+#define PAD_SERIAL1_RX (SERCOM_RX_PAD_3)
+
+/*
+ * SPI Interfaces
+ */
+#define SPI_INTERFACES_COUNT 1
+
+#define PIN_SPI_MISO (22u)
+#define PIN_SPI_MOSI (23u)
+#define PIN_SPI_SCK (24u)
+
+#define PERIPH_SPI sercom4
+#define PAD_SPI_TX SPI_PAD_2_SCK_3
+#define PAD_SPI_RX SERCOM_RX_PAD_0
+
+static const uint8_t SS = (25ul) ; // SERCOM4 last PAD is present on A2 but HW SS isn't used. Set here only for reference.
+static const uint8_t MOSI = PIN_SPI_MOSI ;
+static const uint8_t MISO = PIN_SPI_MISO ;
+static const uint8_t SCK = PIN_SPI_SCK ;
+
+/*
+ * Wire Interfaces
+ */
+#define WIRE_INTERFACES_COUNT 1
+
+#define PIN_WIRE_SDA (20u)
+#define PIN_WIRE_SCL (21u)
+#define PERIPH_WIRE sercom3
+#define WIRE_IT_HANDLER SERCOM3_Handler
+
+/*
+ * USB
+ */
+#define PIN_USB_HOST_ENABLE (27ul)
+#define PIN_USB_DM (28ul)
+#define PIN_USB_DP (29ul)
+
+#ifdef __cplusplus
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * Arduino objects - C++ only
+ *----------------------------------------------------------------------------*/
+
+#ifdef __cplusplus
+
+/* =========================
+ * ===== SERCOM DEFINITION
+ * =========================
+*/
+extern SERCOM sercom0;
+extern SERCOM sercom1;
+extern SERCOM sercom2;
+extern SERCOM sercom3;
+extern SERCOM sercom4;
+extern SERCOM sercom5;
+
+extern Uart Serial;
+extern Uart Serial1;
+
+#endif
+
+// These serial port names are intended to allow libraries and architecture-neutral
+// sketches to automatically default to the correct port name for a particular type
+// of use. For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
+// the first hardware serial port whose RX/TX pins are not dedicated to another use.
+//
+// SERIAL_PORT_MONITOR Port which normally prints to the Arduino Serial Monitor
+//
+// SERIAL_PORT_USBVIRTUAL Port which is USB virtual serial
+//
+// SERIAL_PORT_LINUXBRIDGE Port which connects to a Linux system via Bridge library
+//
+// SERIAL_PORT_HARDWARE Hardware serial port, physical RX & TX pins.
+//
+// SERIAL_PORT_HARDWARE_OPEN Hardware serial ports which are open for use. Their RX & TX
+// pins are NOT connected to anything by default.
+#define SERIAL_PORT_USBVIRTUAL SerialUSB
+#define SERIAL_PORT_MONITOR Serial
+// Serial has no physical pins broken out, so it's not listed as HARDWARE port
+#define SERIAL_PORT_HARDWARE Serial1
+#define SERIAL_PORT_HARDWARE_OPEN Serial1
+
+#endif /* _VARIANT_ARDUINO_ZERO_ */
+