Massdrop keyboard support (#3780)

* Massdrop SAMD51

Massdrop SAMD51 keyboards initial project upload

* Removing relocated files

Removing files that were relocated and not deleted from previous location

* LED queue fix and cleaning

Cleaned some white space or comments.
Fix for LED I2C command queue.
Cleaned up interrupts.
Added debug function for printing numbers to scope through m15 line.

* Factory programmed serial usage

Ability to use factory programmed serial in hub and keyboard usb descriptors

* USB serial number and bugfix

Added support for factory programmed serial and usage.
Incorporated bootloader's conditional compiling to align project closer.
Fixed issue when USB device attempted to send before enabled.
General white space and comment cleanup.

* Project cleanup

Cleaned up project in terms of white space, commented code, and unecessary files.
NKRO keyboard is now using correct setreport although KBD was fine to use.
Fixed broken linkage to __xprintf for serial debug statements.

* Fix for extra keys

Fixed possible USB hang on extra keys report set missing

* I2C cleanup

I2C cleanup and file renames necessary for master branch merge

* Boot tracing and clocks cleanup

Added optional boot debug trace mode through debug LED codes.
General clock code cleanup.

* Relocate ARM/Atmel headers

Moved ARM/Atmel header folder from drivers to lib and made necessary makefile changes.

* Pull request changes

Pull request changes

* Keymap and compile flag fix

Keymap fix for momentary layer.
Potential compile flag fix for Travis CI failure.

* va_list include fix

Fix for va_list compile failure

* Include file case fixes

Fixes for include files with incorrect case

* ctrl and alt67 keyboard readme

Added ctrl and alt67 keyboard readme files

65 files changed, 17114 insertions, 1 deletions

diff --git a/tmk_core/arm_atsam.mk b/tmk_core/arm_atsam.mk
new file mode 100644
index 0000000000..ef412d59d6
--- /dev/null
+++ b/tmk_core/arm_atsam.mk
@@ -0,0 +1,56 @@
+# Hey Emacs, this is a -*- makefile -*-
+##############################################################################
+# Compiler settings
+#
+CC = arm-none-eabi-gcc
+OBJCOPY = arm-none-eabi-objcopy
+OBJDUMP = arm-none-eabi-objdump
+SIZE = arm-none-eabi-size
+AR = arm-none-eabi-ar rcs
+NM = arm-none-eabi-nm
+HEX = $(OBJCOPY) -O $(FORMAT) -R .eeprom -R .fuse -R .lock -R .signature
+EEP = $(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT)
+BIN =
+
+COMMON_VPATH += $(LIB_PATH)/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include
+COMMON_VPATH += $(LIB_PATH)/arm_atsam/packs/arm/cmsis/5.0.1/CMSIS/Include
+
+COMPILEFLAGS += -funsigned-char
+COMPILEFLAGS += -funsigned-bitfields
+COMPILEFLAGS += -ffunction-sections
+COMPILEFLAGS += -fshort-enums
+COMPILEFLAGS += -fno-inline-small-functions
+COMPILEFLAGS += -fno-strict-aliasing
+COMPILEFLAGS += -mfloat-abi=hard
+COMPILEFLAGS += -mfpu=fpv4-sp-d16
+COMPILEFLAGS += -mthumb
+
+#ALLOW_WARNINGS = yes
+
+CFLAGS += $(COMPILEFLAGS)
+
+CPPFLAGS += $(COMPILEFLAGS)
+CPPFLAGS += -fno-exceptions -std=c++11
+
+LDFLAGS +=-Wl,--gc-sections
+LDFLAGS += -Wl,-Map="%OUT%%PROJ_NAME%.map"
+LDFLAGS += -Wl,--start-group
+LDFLAGS += -Wl,--end-group
+LDFLAGS += -Wl,--gc-sections
+LDFLAGS += -T$(LIB_PATH)/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/gcc/gcc/samd51j18a_flash.ld
+
+OPT_DEFS += -DPROTOCOL_ARM_ATSAM
+
+MCUFLAGS = -mcpu=$(MCU)
+MCUFLAGS += -D__$(ARM_ATSAM)__
+
+# List any extra directories to look for libraries here.
+#     Each directory must be seperated by a space.
+#     Use forward slashes for directory separators.
+#     For a directory that has spaces, enclose it in quotes.
+EXTRALIBDIRS =
+
+# Convert hex to bin.
+bin: $(BUILD_DIR)/$(TARGET).hex
+	$(OBJCOPY) -Iihex -Obinary $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin
+	$(COPY) $(BUILD_DIR)/$(TARGET).bin $(TARGET).bin;
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 3e407f1573..fd91d29dce 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -3,6 +3,8 @@ ifeq ($(PLATFORM),AVR)
 	PLATFORM_COMMON_DIR = $(COMMON_DIR)/avr
 else ifeq ($(PLATFORM),CHIBIOS)
 	PLATFORM_COMMON_DIR = $(COMMON_DIR)/chibios
+else ifeq ($(PLATFORM),ARM_ATSAM)
+	PLATFORM_COMMON_DIR = $(COMMON_DIR)/arm_atsam
 else
 	PLATFORM_COMMON_DIR = $(COMMON_DIR)/test
 endif
@@ -35,6 +37,10 @@ ifeq ($(PLATFORM),CHIBIOS)
   endif
 endif
 
+ifeq ($(PLATFORM),ARM_ATSAM)
+	TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
+endif
+
 ifeq ($(PLATFORM),TEST)
 	TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
 endif
diff --git a/tmk_core/common/arm_atsam/bootloader.c b/tmk_core/common/arm_atsam/bootloader.c
new file mode 100644
index 0000000000..5155d9ff04
--- /dev/null
+++ b/tmk_core/common/arm_atsam/bootloader.c
@@ -0,0 +1,19 @@
+/* Copyright 2017 Fred Sundvik
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "bootloader.h"
+
+void bootloader_jump(void) {}
diff --git a/tmk_core/common/arm_atsam/eeprom.c b/tmk_core/common/arm_atsam/eeprom.c
new file mode 100644
index 0000000000..61cc039efa
--- /dev/null
+++ b/tmk_core/common/arm_atsam/eeprom.c
@@ -0,0 +1,98 @@
+/* Copyright 2017 Fred Sundvik
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "eeprom.h"
+
+#define EEPROM_SIZE 32
+
+static uint8_t buffer[EEPROM_SIZE];
+
+uint8_t eeprom_read_byte(const uint8_t *addr) {
+	uintptr_t offset = (uintptr_t)addr;
+	return buffer[offset];
+}
+
+void eeprom_write_byte(uint8_t *addr, uint8_t value) {
+	uintptr_t offset = (uintptr_t)addr;
+	buffer[offset] = value;
+}
+
+uint16_t eeprom_read_word(const uint16_t *addr) {
+	const uint8_t *p = (const uint8_t *)addr;
+	return eeprom_read_byte(p) | (eeprom_read_byte(p+1) << 8);
+}
+
+uint32_t eeprom_read_dword(const uint32_t *addr) {
+	const uint8_t *p = (const uint8_t *)addr;
+	return eeprom_read_byte(p) | (eeprom_read_byte(p+1) << 8)
+		| (eeprom_read_byte(p+2) << 16) | (eeprom_read_byte(p+3) << 24);
+}
+
+void eeprom_read_block(void *buf, const void *addr, uint32_t len) {
+	const uint8_t *p = (const uint8_t *)addr;
+	uint8_t *dest = (uint8_t *)buf;
+	while (len--) {
+		*dest++ = eeprom_read_byte(p++);
+	}
+}
+
+void eeprom_write_word(uint16_t *addr, uint16_t value) {
+	uint8_t *p = (uint8_t *)addr;
+	eeprom_write_byte(p++, value);
+	eeprom_write_byte(p, value >> 8);
+}
+
+void eeprom_write_dword(uint32_t *addr, uint32_t value) {
+	uint8_t *p = (uint8_t *)addr;
+	eeprom_write_byte(p++, value);
+	eeprom_write_byte(p++, value >> 8);
+	eeprom_write_byte(p++, value >> 16);
+	eeprom_write_byte(p, value >> 24);
+}
+
+void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
+	uint8_t *p = (uint8_t *)addr;
+	const uint8_t *src = (const uint8_t *)buf;
+	while (len--) {
+		eeprom_write_byte(p++, *src++);
+	}
+}
+
+void eeprom_update_byte(uint8_t *addr, uint8_t value) {
+	eeprom_write_byte(addr, value);
+}
+
+void eeprom_update_word(uint16_t *addr, uint16_t value) {
+	uint8_t *p = (uint8_t *)addr;
+	eeprom_write_byte(p++, value);
+	eeprom_write_byte(p, value >> 8);
+}
+
+void eeprom_update_dword(uint32_t *addr, uint32_t value) {
+	uint8_t *p = (uint8_t *)addr;
+	eeprom_write_byte(p++, value);
+	eeprom_write_byte(p++, value >> 8);
+	eeprom_write_byte(p++, value >> 16);
+	eeprom_write_byte(p, value >> 24);
+}
+
+void eeprom_update_block(const void *buf, void *addr, uint32_t len) {
+	uint8_t *p = (uint8_t *)addr;
+	const uint8_t *src = (const uint8_t *)buf;
+	while (len--) {
+		eeprom_write_byte(p++, *src++);
+	}
+}
diff --git a/tmk_core/common/arm_atsam/printf.h b/tmk_core/common/arm_atsam/printf.h
new file mode 100644
index 0000000000..582c83bf54
--- /dev/null
+++ b/tmk_core/common/arm_atsam/printf.h
@@ -0,0 +1,8 @@
+#ifndef _PRINTF_H_
+#define _PRINTF_H_
+
+#define __xprintf dpf
+int dpf(const char *_Format, ...);
+
+#endif //_PRINTF_H_
+
diff --git a/tmk_core/common/arm_atsam/suspend.c b/tmk_core/common/arm_atsam/suspend.c
new file mode 100644
index 0000000000..01d1930ea5
--- /dev/null
+++ b/tmk_core/common/arm_atsam/suspend.c
@@ -0,0 +1,17 @@
+/* Copyright 2017 Fred Sundvik
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
diff --git a/tmk_core/common/arm_atsam/timer.c b/tmk_core/common/arm_atsam/timer.c
new file mode 100644
index 0000000000..bcfe5002c3
--- /dev/null
+++ b/tmk_core/common/arm_atsam/timer.c
@@ -0,0 +1,59 @@
+#include "samd51j18a.h"
+#include "timer.h"
+#include "tmk_core/protocol/arm_atsam/clks.h"
+
+void set_time(uint64_t tset)
+{
+    ms_clk = tset;
+}
+
+void timer_init(void)
+{
+    ms_clk = 0;
+}
+
+uint16_t timer_read(void)
+{
+    return (uint16_t)ms_clk;
+}
+
+uint32_t timer_read32(void)
+{
+    return (uint32_t)ms_clk;
+}
+
+uint64_t timer_read64(void)
+{
+    return ms_clk;
+}
+
+uint16_t timer_elapsed(uint16_t tlast)
+{
+    return TIMER_DIFF_16(timer_read(), tlast);
+}
+
+uint32_t timer_elapsed32(uint32_t tlast)
+{
+    return TIMER_DIFF_32(timer_read32(), tlast);
+}
+
+uint32_t timer_elapsed64(uint32_t tlast)
+{
+    uint64_t tnow = timer_read64();
+    return (tnow >= tlast ? tnow - tlast : UINT64_MAX - tlast + tnow);
+}
+
+void timer_clear(void)
+{
+    ms_clk = 0;
+}
+
+void wait_ms(uint64_t msec)
+{
+    CLK_delay_ms(msec);
+}
+
+void wait_us(uint16_t usec)
+{
+    CLK_delay_us(usec);
+}
diff --git a/tmk_core/common/print.h b/tmk_core/common/print.h
index 8836c0fc7c..9cbe67bad6 100644
--- a/tmk_core/common/print.h
+++ b/tmk_core/common/print.h
@@ -99,6 +99,34 @@ void print_set_sendchar(int8_t (*print_sendchar_func)(uint8_t));
 
 #  endif /* USER_PRINT / NORMAL PRINT */
 
+#elif defined(PROTOCOL_ARM_ATSAM) /* PROTOCOL_ARM_ATSAM */
+
+#  include "arm_atsam/printf.h"
+
+#  ifdef USER_PRINT /* USER_PRINT */
+
+// Remove normal print defines
+#    define print(s)
+#    define println(s)
+#    define xprintf(fmt, ...)
+
+// Create user print defines
+#    define uprintf(fmt, ...)  __xprintf(fmt, ##__VA_ARGS__)
+#    define uprint(s)          xprintf(s)
+#    define uprintln(s)        xprintf(s "\r\n")
+
+#  else /* NORMAL PRINT */
+
+// Create user & normal print defines
+#    define xprintf(fmt, ...)  __xprintf(fmt, ##__VA_ARGS__)
+#    define print(s)           xprintf(s)
+#    define println(s)         xprintf(s "\r\n")
+#    define uprint(s)          print(s)
+#    define uprintln(s)        println(s)
+#    define uprintf(fmt, ...)  xprintf(fmt, ...)
+
+#  endif /* USER_PRINT / NORMAL PRINT */
+
 #elif defined(__arm__) /* __arm__ */
 
 #  include "mbed/xprintf.h"
@@ -130,7 +158,7 @@ void print_set_sendchar(int8_t (*print_sendchar_func)(uint8_t));
 /* TODO: to select output destinations: UART/USBSerial */
 #  define print_set_sendchar(func)
 
-#endif /* __AVR__ / PROTOCOL_CHIBIOS / __arm__ */
+#endif /* __AVR__ / PROTOCOL_CHIBIOS / PROTOCOL_ARM_ATSAM / __arm__ */
 
 // User print disables the normal print messages in the body of QMK/TMK code and
 // is meant as a lightweight alternative to NOPRINT. Use it when you only want to do
diff --git a/tmk_core/common/report.h b/tmk_core/common/report.h
index 6c27eb9dc6..167f382751 100644
--- a/tmk_core/common/report.h
+++ b/tmk_core/common/report.h
@@ -84,6 +84,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     #define KEYBOARD_REPORT_SIZE NKRO_EPSIZE
     #define KEYBOARD_REPORT_KEYS (NKRO_EPSIZE - 2)
     #define KEYBOARD_REPORT_BITS (NKRO_EPSIZE - 1)
+  #elif defined(PROTOCOL_ARM_ATSAM)
+    #include "protocol/arm_atsam/usb/udi_device_epsize.h"
+    #define KEYBOARD_REPORT_SIZE NKRO_EPSIZE
+    #define KEYBOARD_REPORT_KEYS (NKRO_EPSIZE - 2)
+    #define KEYBOARD_REPORT_BITS (NKRO_EPSIZE - 1)
   #else
     #error "NKRO not supported with this protocol"
 #endif
diff --git a/tmk_core/protocol/arm_atsam.mk b/tmk_core/protocol/arm_atsam.mk
new file mode 100644
index 0000000000..d535b64cd7
--- /dev/null
+++ b/tmk_core/protocol/arm_atsam.mk
@@ -0,0 +1,26 @@
+ARM_ATSAM_DIR = protocol/arm_atsam
+
+SRC += $(ARM_ATSAM_DIR)/adc.c
+SRC += $(ARM_ATSAM_DIR)/clks.c
+SRC += $(ARM_ATSAM_DIR)/d51_util.c
+SRC += $(ARM_ATSAM_DIR)/i2c_master.c
+SRC += $(ARM_ATSAM_DIR)/led_matrix.c
+SRC += $(ARM_ATSAM_DIR)/main_arm_atsam.c
+SRC += $(ARM_ATSAM_DIR)/spi.c
+SRC += $(ARM_ATSAM_DIR)/startup.c
+
+SRC += $(ARM_ATSAM_DIR)/usb/main_usb.c
+SRC += $(ARM_ATSAM_DIR)/usb/spfssf.c
+SRC += $(ARM_ATSAM_DIR)/usb/udc.c
+SRC += $(ARM_ATSAM_DIR)/usb/udi_cdc.c
+SRC += $(ARM_ATSAM_DIR)/usb/udi_hid.c
+SRC += $(ARM_ATSAM_DIR)/usb/udi_hid_kbd.c
+SRC += $(ARM_ATSAM_DIR)/usb/udi_hid_kbd_desc.c
+SRC += $(ARM_ATSAM_DIR)/usb/ui.c
+SRC += $(ARM_ATSAM_DIR)/usb/usb2422.c
+SRC += $(ARM_ATSAM_DIR)/usb/usb.c
+SRC += $(ARM_ATSAM_DIR)/usb/usb_device_udd.c
+SRC += $(ARM_ATSAM_DIR)/usb/usb_util.c
+
+# Search Path
+VPATH += $(TMK_DIR)/$(ARM_ATSAM_DIR)
diff --git a/tmk_core/protocol/arm_atsam/adc.c b/tmk_core/protocol/arm_atsam/adc.c
new file mode 100644
index 0000000000..ab77f92402
--- /dev/null
+++ b/tmk_core/protocol/arm_atsam/adc.c
@@ -0,0 +1,99 @@
+/*
+Copyright 2018 Massdrop Inc.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "arm_atsam_protocol.h"
+
+uint16_t v_5v;
+uint16_t v_5v_avg;
+uint16_t v_con_1;
+uint16_t v_con_2;
+uint16_t v_con_1_boot;
+uint16_t v_con_2_boot;
+
+void ADC0_clock_init(void)
+{
+    DBGC(DC_ADC0_CLOCK_INIT_BEGIN);
+
+    MCLK->APBDMASK.bit.ADC0_ = 1;                        //ADC0 Clock Enable
+
+    GCLK->PCHCTRL[ADC0_GCLK_ID].bit.GEN = GEN_OSC0;      //Select generator clock
+    GCLK->PCHCTRL[ADC0_GCLK_ID].bit.CHEN = 1;            //Enable peripheral clock
+
+    DBGC(DC_ADC0_CLOCK_INIT_COMPLETE);
+}
+
+void ADC0_init(void)
+{
+    DBGC(DC_ADC0_INIT_BEGIN);
+
+    //MCU
+    PORT->Group[1].DIRCLR.reg = 1 << 0;                   //PB00 as input 5V
+    PORT->Group[1].DIRCLR.reg = 1 << 1;                   //PB01 as input CON2
+    PORT->Group[1].DIRCLR.reg = 1 << 2;                   //PB02 as input CON1
+    PORT->Group[1].PMUX[0].bit.PMUXE = 1;                 //PB00 mux select B ADC 5V
+    PORT->Group[1].PMUX[0].bit.PMUXO = 1;                 //PB01 mux select B ADC CON2
+    PORT->Group[1].PMUX[1].bit.PMUXE = 1;                 //PB02 mux select B ADC CON1
+    PORT->Group[1].PINCFG[0].bit.PMUXEN = 1;              //PB01 mux ADC Enable 5V
+    PORT->Group[1].PINCFG[1].bit.PMUXEN = 1;              //PB01 mux ADC Enable CON2
+    PORT->Group[1].PINCFG[2].bit.PMUXEN = 1;              //PB02 mux ADC Enable CON1
+
+    //ADC
+    ADC0->CTRLA.bit.SWRST = 1;
+    while (ADC0->SYNCBUSY.bit.SWRST) { DBGC(DC_ADC0_SWRST_SYNCING_1); }
+    while (ADC0->CTRLA.bit.SWRST) { DBGC(DC_ADC0_SWRST_SYNCING_2); }
+
+    //Clock divide
+    ADC0->CTRLA.bit.PRESCALER = ADC_CTRLA_PRESCALER_DIV2_Val;
+
+    //Averaging
+    ADC0->AVGCTRL.bit.SAMPLENUM = ADC_AVGCTRL_SAMPLENUM_4_Val;
+    while (ADC0->SYNCBUSY.bit.AVGCTRL) { DBGC(DC_ADC0_AVGCTRL_SYNCING_1); }
+    if      (ADC0->AVGCTRL.bit.SAMPLENUM == ADC_AVGCTRL_SAMPLENUM_1_Val) ADC0->AVGCTRL.bit.ADJRES = 0;
+    else if (ADC0->AVGCTRL.bit.SAMPLENUM == ADC_AVGCTRL_SAMPLENUM_2_Val) ADC0->AVGCTRL.bit.ADJRES = 1;
+    else if (ADC0->AVGCTRL.bit.SAMPLENUM == ADC_AVGCTRL_SAMPLENUM_4_Val) ADC0->AVGCTRL.bit.ADJRES = 2;
+    else if (ADC0->AVGCTRL.bit.SAMPLENUM == ADC_AVGCTRL_SAMPLENUM_8_Val) ADC0->AVGCTRL.bit.ADJRES = 3;
+    else                                                                 ADC0->AVGCTRL.bit.ADJRES = 4;
+    while (ADC0->SYNCBUSY.bit.AVGCTRL) { DBGC(DC_ADC0_AVGCTRL_SYNCING_2); }
+
+    //Settling
+    ADC0->SAMPCTRL.bit.SAMPLEN = 45;      //Sampling Time Length: 1-63, 1 ADC CLK per
+    while (ADC0->SYNCBUSY.bit.SAMPCTRL) { DBGC(DC_ADC0_SAMPCTRL_SYNCING_1); }
+
+    //Load factory calibration data
+    ADC0->CALIB.bit.BIASCOMP = (ADC0_FUSES_BIASCOMP_ADDR >> ADC0_FUSES_BIASCOMP_Pos) & ADC0_FUSES_BIASCOMP_Msk;
+    ADC0->CALIB.bit.BIASR2R = (ADC0_FUSES_BIASR2R_ADDR >> ADC0_FUSES_BIASR2R_Pos) & ADC0_FUSES_BIASR2R_Msk;
+    ADC0->CALIB.bit.BIASREFBUF = (ADC0_FUSES_BIASREFBUF_ADDR >> ADC0_FUSES_BIASREFBUF_Pos) & ADC0_FUSES_BIASREFBUF_Msk;
+
+    //Enable
+    ADC0->CTRLA.bit.ENABLE = 1;
+    while (ADC0->SYNCBUSY.bit.ENABLE) { DBGC(DC_ADC0_ENABLE_SYNCING_1); }
+
+    DBGC(DC_ADC0_INIT_COMPLETE);
+}
+
+uint16_t adc_get(uint8_t muxpos)
+{
+    ADC0->INPUTCTRL.bit.MUXPOS = muxpos;
+    while (ADC0->SYNCBUSY.bit.INPUTCTRL) {}
+
+    ADC0->SWTRIG.bit.START = 1;
+    while (ADC0->SYNCBUSY.bit.SWTRIG) {}
+