Merge remote-tracking branch 'origin/master' into stemmafriend

boards.txt

@@ -427,6 +427,54 @@ adafruit_itsybitsy_m0.menu.debug.on=On
 adafruit_itsybitsy_m0.menu.debug.on.build.flags.debug=-g
 
 
+# Adafruit STEMMA Friend (SAMD21)
+# ------------------------------
+adafruit_stemmafriend_m0.name=Adafruit STEMMA Friend (SAMD21)
+adafruit_stemmafriend_m0.vid.0=0x239A
+adafruit_stemmafriend_m0.pid.0=0x80E3
+adafruit_stemmafriend_m0.vid.1=0x239A
+adafruit_stemmafriend_m0.pid.1=0x00E3
+adafruit_stemmafriend_m0.vid.1=0x239A
+adafruit_stemmafriend_m0.pid.1=0x80E4
+adafruit_stemmafriend_m0.upload.tool=bossac
+adafruit_stemmafriend_m0.upload.protocol=sam-ba
+adafruit_stemmafriend_m0.upload.maximum_size=262144
+adafruit_stemmafriend_m0.upload.offset=0x2000
+adafruit_stemmafriend_m0.upload.use_1200bps_touch=true
+adafruit_stemmafriend_m0.upload.wait_for_upload_port=true
+adafruit_stemmafriend_m0.upload.native_usb=true
+adafruit_stemmafriend_m0.build.mcu=cortex-m0plus
+adafruit_stemmafriend_m0.build.f_cpu=48000000L
+adafruit_stemmafriend_m0.build.usb_product="STEMMA Friend"
+adafruit_stemmafriend_m0.build.usb_manufacturer="Adafruit"
+adafruit_stemmafriend_m0.build.board=STEMMA_FRIEND
+adafruit_stemmafriend_m0.build.core=arduino
+adafruit_stemmafriend_m0.build.extra_flags=-DCRYSTALLESS -DADAFRUIT_STEMMAFRIEND_M0 -D__SAMD21E18A__ -DARM_MATH_CM0PLUS {build.usb_flags}
+adafruit_stemmafriend_m0.build.ldscript=linker_scripts/gcc/flash_with_bootloader.ld
+adafruit_stemmafriend_m0.build.openocdscript=openocd_scripts/trinket_m0.cfg
+adafruit_stemmafriend_m0.build.variant=stemma_friend
+adafruit_stemmafriend_m0.build.variant_system_lib=
+adafruit_stemmafriend_m0.build.vid=0x239A
+adafruit_stemmafriend_m0.build.pid=0x80E3
+adafruit_stemmafriend_m0.bootloader.tool=openocd
+adafruit_stemmafriend_m0.bootloader.file=qtpyM0/bootloader-qtpy_m0.bin
+adafruit_stemmafriend_m0.menu.usbstack.arduino=Arduino
+adafruit_stemmafriend_m0.menu.usbstack.tinyusb=TinyUSB
+adafruit_stemmafriend_m0.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
+adafruit_stemmafriend_m0.menu.debug.off=Off
+adafruit_stemmafriend_m0.menu.debug.on=On
+adafruit_stemmafriend_m0.menu.debug.on.build.flags.debug=-g
+adafruit_stemmafriend_m0.menu.opt.small=Small (-Os) (standard)
+adafruit_stemmafriend_m0.menu.opt.small.build.flags.optimize=-Os
+adafruit_stemmafriend_m0.menu.opt.fast=Fast (-O2)
+adafruit_stemmafriend_m0.menu.opt.fast.build.flags.optimize=-O2
+adafruit_stemmafriend_m0.menu.opt.faster=Faster (-O3)
+adafruit_stemmafriend_m0.menu.opt.faster.build.flags.optimize=-O3
+adafruit_stemmafriend_m0.menu.opt.fastest=Fastest (-Ofast)
+adafruit_stemmafriend_m0.menu.opt.fastest.build.flags.optimize=-Ofast
+adafruit_stemmafriend_m0.menu.opt.dragons=Here be dragons (-Ofast -funroll-loops)
+adafruit_stemmafriend_m0.menu.opt.dragons.build.flags.optimize=-Ofast -funroll-loops
+
 # Adafruit PIRkey (SAMD21)
 # ------------------------------
 adafruit_pirkey.name=Adafruit pIRkey

variants/stemma_friend/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 at91samd21e18" -f target/at91samdXX.cfg -c "gdb_port pipe; log_output openocd.log"

variants/stemma_friend/linker_scripts/gcc/flash_with_bootloader.ld

@@ -0,0 +1,216 @@
+/*
+  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 :
+	{
+		__text_start__ = .;
+
+		KEEP(*(.sketch_boot))
+
+		. = ALIGN(0x2000);
+		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(16);
+		/* 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")
+}

variants/stemma_friend/linker_scripts/gcc/flash_without_bootloader.ld

@@ -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
+*/
+
+/* 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 :
+	{
+		__text_start__ = .;
+
+		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(16);
+		/* 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")
+}

variants/stemma_friend/openocd_scripts/qtpy_m0.cfg

@@ -0,0 +1,28 @@
+#
+#  Adafruit ItsyBitsy M0 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
+#
+
+# chip name
+set CHIPNAME at91samd21e18
+set ENDIAN little
+
+# choose a port here
+set telnet_port 0
+
+source [find target/at91samdXX.cfg]

variants/stemma_friend/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"
+

variants/stemma_friend/variant.cpp

@@ -0,0 +1,80 @@
+/*
+  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
+*/
+
+#include "variant.h"
+#include "Arduino.h"
+/*
+ * Pins descriptions
+ */
+const PinDescription g_APinDescription[]=
+{
+  // D0 / D1 - UART TX & RX or I2C on SERCOM2 (shared on grove connector)
+  { PORTA,  8, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), ADC_Channel16, PWM1_CH2, TCC1_CH2, EXTERNAL_INT_NMI },  // SDA1
+  { PORTA,  9, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), ADC_Channel17, PWM1_CH3, TCC1_CH3, EXTERNAL_INT_9 },  // SCL1
+
+  // D2 / D3 - I2C SDA & SCL on SERCOM1
+  { PORTA, 16, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_0 }, // SDA
+  { PORTA, 17, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH7, TCC0_CH7, EXTERNAL_INT_1 }, // SCL
+
+  // D4, D5, D6, D7 - TFT control
+  { PORTA,  3, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG), ADC_Channel1, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_3 }, // TFT Reset
+  { PORTA,  4, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER), ADC_Channel4, PWM0_CH0, TCC0_CH0, EXTERNAL_INT_4 }, // TFT CS
+  { PORTA,  6, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER), ADC_Channel6, PWM1_CH0, TCC1_CH0, EXTERNAL_INT_6 }, // TFT DC
+  { PORTA, 11, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), ADC_Channel19, PWM0_CH3, TCC0_CH3, EXTERNAL_INT_11 }, // TFT LIT
+
+  // D8 - NeoPixel
+  { PORTA, 10, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), ADC_Channel18, PWM0_CH2, TCC0_CH2, EXTERNAL_INT_10 }, // NeoPixel
+  
+  // D9 - Mode button
+  { PORTA, 27, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // Button
+
+  // D10, D11, D12 - SPI on SERCOM 0
+  { PORTA,  5, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER), ADC_Channel5, PWM0_CH1, TCC0_CH1, EXTERNAL_INT_5 }, //SCK
+  { PORTA,  7, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER), ADC_Channel7, PWM1_CH1, TCC1_CH1, EXTERNAL_INT_7 }, // MOSI
+  { PORTA, 28, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // Unused pin (MISO)
+  
+  // D13 fake pin
+  { PORTA, 22, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH4, TCC0_CH4, EXTERNAL_INT_6 },   // D16 / MOSI1
+
+  // D14 (unused DAC)
+  { PORTA,  2, PIO_ANALOG, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG|PIN_ATTR_PWM|PIN_ATTR_TIMER), ADC_Channel0, PWM2_CH0, TCC2_CH0, EXTERNAL_INT_2 }, // A0 / D0 / DAC
+
+  // USB pins
+  { 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
+} ;
+
+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 ) ;
+
+Uart Serial1( &sercom2, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX ) ;
+
+// If wire.h isnt included, just do nothing
+void WIRE_IT_HANDLER(void) __attribute__ ((weak));
+
+void SERCOM2_Handler()
+{
+  Serial1.IrqHandler();
+  WIRE_IT_HANDLER();
+}

variants/stemma_friend/variant.h

@@ -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
+*/
+
+#ifndef _VARIANT_STEMMAFRIEND_ZERO_
+#define _VARIANT_STEMMAFRIEND_ZERO_
+
+// The definitions here needs a SAMD core >=1.6.10
+#define ARDUINO_SAMD_VARIANT_COMPLIANCE 10610
+
+/*----------------------------------------------------------------------------
+ *        Definitions
+ *----------------------------------------------------------------------------*/
+
+/** Frequency of the board main oscillator */
+#define VARIANT_MAINOSC		(32768ul)
+
+/** Master clock frequency */
+#define VARIANT_MCK	(F_CPU)
+
+/*----------------------------------------------------------------------------
+ *        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           (17u)
+#define NUM_DIGITAL_PINS     (17u)
+#define NUM_ANALOG_INPUTS    (2u)
+#define NUM_ANALOG_OUTPUTS   (1u)
+#define analogInputToDigitalPin(p)  (p)
+
+#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)
+
+// LEDs
+#define PIN_LED_13           (13u)
+#define PIN_LED              PIN_LED_13
+#define LED_BUILTIN          PIN_LED_13
+#define PIN_NEOPIXEL         (8u)
+
+/*
+ * Analog pins
+ */
+#define PIN_A0               (0ul)
+#define PIN_A1               (PIN_A0 + 1)
+#define PIN_DAC0             (14ul)
+
+static const uint8_t A0  = PIN_A0;
+static const uint8_t A1  = PIN_A1;
+static const uint8_t DAC0 = PIN_DAC0;
+
+#define ADC_RESOLUTION		12
+
+/*
+ * Serial interfaces
+ */
+
+// Serial1
+#define PIN_SERIAL1_TX       (0ul)
+#define PIN_SERIAL1_RX       (1ul)
+#define PAD_SERIAL1_TX       (UART_TX_PAD_0)
+#define PAD_SERIAL1_RX       (SERCOM_RX_PAD_1)
+
+/*
+ * SPI Interfaces
+ */
+#define SPI_INTERFACES_COUNT 1
+
+#define PIN_SPI_SCK          (10u)
+#define PIN_SPI_MISO         (12u)
+#define PIN_SPI_MOSI         (11u)
+#define PERIPH_SPI           sercom0
+#define PAD_SPI_TX           SPI_PAD_3_SCK_1
+#define PAD_SPI_RX           SERCOM_RX_PAD_2
+
+static const uint8_t SS	  = 5 ;	// TFT CS
+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 2
+
+#define PIN_WIRE_SDA         (2u)
+#define PIN_WIRE_SCL         (3u)
+#define PERIPH_WIRE          sercom1
+#define WIRE_IT_HANDLER      SERCOM1_Handler
+
+static const uint8_t SDA = PIN_WIRE_SDA;
+static const uint8_t SCL = PIN_WIRE_SCL;
+
+
+#define PIN_WIRE1_SDA         (0u)
+#define PIN_WIRE1_SCL         (1u)
+#define PERIPH_WIRE1          sercom2
+//#define WIRE1_IT_HANDLER      SERCOM2_Handler    // hack! we call the i2c handler from within the serial handler!
+
+static const uint8_t SDA1 = PIN_WIRE1_SDA;
+static const uint8_t SCL1 = PIN_WIRE1_SCL;
+
+/*
+ * USB
+ */
+#define PIN_USB_HOST_ENABLE (18ul)
+#define PIN_USB_DM          (19ul)
+#define PIN_USB_DP          (20ul)
+/*
+ * I2S Interfaces
+ */
+#define I2S_INTERFACES_COUNT 1
+
+#define I2S_DEVICE          0
+#define I2S_CLOCK_GENERATOR 3
+#define PIN_I2S_SD          (A7)
+#define PIN_I2S_SCK         (MOSI)
+#define PIN_I2S_FS          (SCK)
+
+#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 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      Serial
+#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_ */
+