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

1 files changed, 99 insertions, 0 deletions

diff --git a/lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include/instance/adc0.h b/lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include/instance/adc0.h
new file mode 100644
index 000000000..6808fff9d
--- /dev/null
+++ b/lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include/instance/adc0.h
@@ -0,0 +1,99 @@
+/**
+ * \file
+ *
+ * \brief Instance description for ADC0
+ *
+ * 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
+ *
+ */
+
+#ifndef _SAMD51_ADC0_INSTANCE_
+#define _SAMD51_ADC0_INSTANCE_
+
+/* ========== Register definition for ADC0 peripheral ========== */
+#if (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__))
+#define REG_ADC0_CTRLA             (0x43001C00) /**< \brief (ADC0) Control A */
+#define REG_ADC0_EVCTRL            (0x43001C02) /**< \brief (ADC0) Event Control */
+#define REG_ADC0_DBGCTRL           (0x43001C03) /**< \brief (ADC0) Debug Control */
+#define REG_ADC0_INPUTCTRL         (0x43001C04) /**< \brief (ADC0) Input Control */
+#define REG_ADC0_CTRLB             (0x43001C06) /**< \brief (ADC0) Control B */
+#define REG_ADC0_REFCTRL           (0x43001C08) /**< \brief (ADC0) Reference Control */
+#define REG_ADC0_AVGCTRL           (0x43001C0A) /**< \brief (ADC0) Average Control */
+#define REG_ADC0_SAMPCTRL          (0x43001C0B) /**< \brief (ADC0) Sample Time Control */
+#define REG_ADC0_WINLT             (0x43001C0C) /**< \brief (ADC0) Window Monitor Lower Threshold */
+#define REG_ADC0_WINUT             (0x43001C0E) /**< \brief (ADC0) Window Monitor Upper Threshold */
+#define REG_ADC0_GAINCORR          (0x43001C10) /**< \brief (ADC0) Gain Correction */
+#define REG_ADC0_OFFSETCORR        (0x43001C12) /**< \brief (ADC0) Offset Correction */
+#define REG_ADC0_SWTRIG            (0x43001C14) /**< \brief (ADC0) Software Trigger */
+#define REG_ADC0_INTENCLR          (0x43001C2C) /**< \brief (ADC0) Interrupt Enable Clear */
+#define REG_ADC0_INTENSET          (0x43001C2D) /**< \brief (ADC0) Interrupt Enable Set */
+#define REG_ADC0_INTFLAG           (0x43001C2E) /**< \brief (ADC0) Interrupt Flag Status and Clear */
+#define REG_ADC0_STATUS            (0x43001C2F) /**< \brief (ADC0) Status */
+#define REG_ADC0_SYNCBUSY          (0x43001C30) /**< \brief (ADC0) Synchronization Busy */
+#define REG_ADC0_DSEQDATA          (0x43001C34) /**< \brief (ADC0) DMA Sequencial Data */
+#define REG_ADC0_DSEQCTRL          (0x43001C38) /**< \brief (ADC0) DMA Sequential Control */
+#define REG_ADC0_DSEQSTAT          (0x43001C3C) /**< \brief (ADC0) DMA Sequencial Status */
+#define REG_ADC0_RESULT            (0x43001C40) /**< \brief (ADC0) Result Conversion Value */
+#define REG_ADC0_RESS              (0x43001C44) /**< \brief (ADC0) Last Sample Result */
+#define REG_ADC0_CALIB             (0x43001C48) /**< \brief (ADC0) Calibration */
+#else
+#define REG_ADC0_CTRLA             (*(RwReg16*)0x43001C00UL) /**< \brief (ADC0) Control A */
+#define REG_ADC0_EVCTRL            (*(RwReg8 *)0x43001C02UL) /**< \brief (ADC0) Event Control */
+#define REG_ADC0_DBGCTRL           (*(RwReg8 *)0x43001C03UL) /**< \brief (ADC0) Debug Control */
+#define REG_ADC0_INPUTCTRL         (*(RwReg16*)0x43001C04UL) /**< \brief (ADC0) Input Control */
+#define REG_ADC0_CTRLB             (*(RwReg16*)0x43001C06UL) /**< \brief (ADC0) Control B */
+#define REG_ADC0_REFCTRL           (*(RwReg8 *)0x43001C08UL) /**< \brief (ADC0) Reference Control */
+#define REG_ADC0_AVGCTRL           (*(RwReg8 *)0x43001C0AUL) /**< \brief (ADC0) Average Control */
+#define REG_ADC0_SAMPCTRL          (*(RwReg8 *)0x43001C0BUL) /**< \brief (ADC0) Sample Time Control */
+#define REG_ADC0_WINLT             (*(RwReg16*)0x43001C0CUL) /**< \brief (ADC0) Window Monitor Lower Threshold */
+#define REG_ADC0_WINUT             (*(RwReg16*)0x43001C0EUL) /**< \brief (ADC0) Window Monitor Upper Threshold */
+#define REG_ADC0_GAINCORR          (*(RwReg16*)0x43001C10UL) /**< \brief (ADC0) Gain Correction */
+#define REG_ADC0_OFFSETCORR        (*(RwReg16*)0x43001C12UL) /**< \brief (ADC0) Offset Correction */
+#define REG_ADC0_SWTRIG            (*(RwReg8 *)0x43001C14UL) /**< \brief (ADC0) Software Trigger */
+#define REG_ADC0_INTENCLR          (*(RwReg8 *)0x43001C2CUL) /**< \brief (ADC0) Interrupt Enable Clear */
+#define REG_ADC0_INTENSET          (*(RwReg8 *)0x43001C2DUL) /**< \brief (ADC0) Interrupt Enable Set */
+#define REG_ADC0_INTFLAG           (*(RwReg8 *)0x43001C2EUL) /**< \brief (ADC0) Interrupt Flag Status and Clear */
+#define REG_ADC0_STATUS            (*(RoReg8 *)0x43001C2FUL) /**< \brief (ADC0) Status */
+#define REG_ADC0_SYNCBUSY          (*(RoReg  *)0x43001C30UL) /**< \brief (ADC0) Synchronization Busy */
+#define REG_ADC0_DSEQDATA          (*(WoReg  *)0x43001C34UL) /**< \brief (ADC0) DMA Sequencial Data */
+#define REG_ADC0_DSEQCTRL          (*(RwReg  *)0x43001C38UL) /**< \brief (ADC0) DMA Sequential Control */
+#define REG_ADC0_DSEQSTAT          (*(RoReg  *)0x43001C3CUL) /**< \brief (ADC0) DMA Sequencial Status */
+#define REG_ADC0_RESULT            (*(RoReg16*)0x43001C40UL) /**< \brief (ADC0) Result Conversion Value */
+#define REG_ADC0_RESS              (*(RoReg16*)0x43001C44UL) /**< \brief (ADC0) Last Sample Result */
+#define REG_ADC0_CALIB             (*(RwReg16*)0x43001C48UL) /**< \brief (ADC0) Calibration */
+#endif /* (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__)) */
+
+/* ========== Instance parameters for ADC0 peripheral ========== */
+#define ADC0_BANDGAP                27       // MUXPOS value to select BANDGAP
+#define ADC0_CTAT                   29       // MUXPOS value to select CTAT
+#define ADC0_DMAC_ID_RESRDY         68       // index of DMA RESRDY trigger
+#define ADC0_DMAC_ID_SEQ            69       // Index of DMA SEQ trigger
+#define ADC0_EXTCHANNEL_MSB         15       // Number of external channels
+#define ADC0_GCLK_ID                40       // index of Generic Clock
+#define ADC0_MASTER_SLAVE_MODE      1        // ADC Master/Slave Mode
+#define ADC0_OPAMP2                 0        // MUXPOS value to select OPAMP2
+#define ADC0_OPAMP01                0        // MUXPOS value to select OPAMP01
+#define ADC0_PTAT                   28       // MUXPOS value to select PTAT
+#define ADC0_TOUCH_IMPLEMENTED      1        // TOUCH implemented or not
+
+#endif /* _SAMD51_ADC0_INSTANCE_ */