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/tcc4.h b/lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include/instance/tcc4.h
new file mode 100644
index 000000000..84d55b8c9
--- /dev/null
+++ b/lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/include/instance/tcc4.h
@@ -0,0 +1,99 @@
+/**
+ * \file
+ *
+ * \brief Instance description for TCC4
+ *
+ * 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_TCC4_INSTANCE_
+#define _SAMD51_TCC4_INSTANCE_
+
+/* ========== Register definition for TCC4 peripheral ========== */
+#if (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__))
+#define REG_TCC4_CTRLA             (0x43001000) /**< \brief (TCC4) Control A */
+#define REG_TCC4_CTRLBCLR          (0x43001004) /**< \brief (TCC4) Control B Clear */
+#define REG_TCC4_CTRLBSET          (0x43001005) /**< \brief (TCC4) Control B Set */
+#define REG_TCC4_SYNCBUSY          (0x43001008) /**< \brief (TCC4) Synchronization Busy */
+#define REG_TCC4_FCTRLA            (0x4300100C) /**< \brief (TCC4) Recoverable Fault A Configuration */
+#define REG_TCC4_FCTRLB            (0x43001010) /**< \brief (TCC4) Recoverable Fault B Configuration */
+#define REG_TCC4_DRVCTRL           (0x43001018) /**< \brief (TCC4) Driver Control */
+#define REG_TCC4_DBGCTRL           (0x4300101E) /**< \brief (TCC4) Debug Control */
+#define REG_TCC4_EVCTRL            (0x43001020) /**< \brief (TCC4) Event Control */
+#define REG_TCC4_INTENCLR          (0x43001024) /**< \brief (TCC4) Interrupt Enable Clear */
+#define REG_TCC4_INTENSET          (0x43001028) /**< \brief (TCC4) Interrupt Enable Set */
+#define REG_TCC4_INTFLAG           (0x4300102C) /**< \brief (TCC4) Interrupt Flag Status and Clear */
+#define REG_TCC4_STATUS            (0x43001030) /**< \brief (TCC4) Status */
+#define REG_TCC4_COUNT             (0x43001034) /**< \brief (TCC4) Count */
+#define REG_TCC4_WAVE              (0x4300103C) /**< \brief (TCC4) Waveform Control */
+#define REG_TCC4_PER               (0x43001040) /**< \brief (TCC4) Period */
+#define REG_TCC4_CC0               (0x43001044) /**< \brief (TCC4) Compare and Capture 0 */
+#define REG_TCC4_CC1               (0x43001048) /**< \brief (TCC4) Compare and Capture 1 */
+#define REG_TCC4_PERBUF            (0x4300106C) /**< \brief (TCC4) Period Buffer */
+#define REG_TCC4_CCBUF0            (0x43001070) /**< \brief (TCC4) Compare and Capture Buffer 0 */
+#define REG_TCC4_CCBUF1            (0x43001074) /**< \brief (TCC4) Compare and Capture Buffer 1 */
+#else
+#define REG_TCC4_CTRLA             (*(RwReg  *)0x43001000UL) /**< \brief (TCC4) Control A */
+#define REG_TCC4_CTRLBCLR          (*(RwReg8 *)0x43001004UL) /**< \brief (TCC4) Control B Clear */
+#define REG_TCC4_CTRLBSET          (*(RwReg8 *)0x43001005UL) /**< \brief (TCC4) Control B Set */
+#define REG_TCC4_SYNCBUSY          (*(RoReg  *)0x43001008UL) /**< \brief (TCC4) Synchronization Busy */
+#define REG_TCC4_FCTRLA            (*(RwReg  *)0x4300100CUL) /**< \brief (TCC4) Recoverable Fault A Configuration */
+#define REG_TCC4_FCTRLB            (*(RwReg  *)0x43001010UL) /**< \brief (TCC4) Recoverable Fault B Configuration */
+#define REG_TCC4_DRVCTRL           (*(RwReg  *)0x43001018UL) /**< \brief (TCC4) Driver Control */
+#define REG_TCC4_DBGCTRL           (*(RwReg8 *)0x4300101EUL) /**< \brief (TCC4) Debug Control */
+#define REG_TCC4_EVCTRL            (*(RwReg  *)0x43001020UL) /**< \brief (TCC4) Event Control */
+#define REG_TCC4_INTENCLR          (*(RwReg  *)0x43001024UL) /**< \brief (TCC4) Interrupt Enable Clear */
+#define REG_TCC4_INTENSET          (*(RwReg  *)0x43001028UL) /**< \brief (TCC4) Interrupt Enable Set */
+#define REG_TCC4_INTFLAG           (*(RwReg  *)0x4300102CUL) /**< \brief (TCC4) Interrupt Flag Status and Clear */
+#define REG_TCC4_STATUS            (*(RwReg  *)0x43001030UL) /**< \brief (TCC4) Status */
+#define REG_TCC4_COUNT             (*(RwReg  *)0x43001034UL) /**< \brief (TCC4) Count */
+#define REG_TCC4_WAVE              (*(RwReg  *)0x4300103CUL) /**< \brief (TCC4) Waveform Control */
+#define REG_TCC4_PER               (*(RwReg  *)0x43001040UL) /**< \brief (TCC4) Period */
+#define REG_TCC4_CC0               (*(RwReg  *)0x43001044UL) /**< \brief (TCC4) Compare and Capture 0 */
+#define REG_TCC4_CC1               (*(RwReg  *)0x43001048UL) /**< \brief (TCC4) Compare and Capture 1 */
+#define REG_TCC4_PERBUF            (*(RwReg  *)0x4300106CUL) /**< \brief (TCC4) Period Buffer */
+#define REG_TCC4_CCBUF0            (*(RwReg  *)0x43001070UL) /**< \brief (TCC4) Compare and Capture Buffer 0 */
+#define REG_TCC4_CCBUF1            (*(RwReg  *)0x43001074UL) /**< \brief (TCC4) Compare and Capture Buffer 1 */
+#endif /* (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__)) */
+
+/* ========== Instance parameters for TCC4 peripheral ========== */
+#define TCC4_CC_NUM                 2        // Number of Compare/Capture units
+#define TCC4_DITHERING              0        // Dithering feature implemented
+#define TCC4_DMAC_ID_MC_0           42
+#define TCC4_DMAC_ID_MC_1           43
+#define TCC4_DMAC_ID_MC_LSB         42
+#define TCC4_DMAC_ID_MC_MSB         43
+#define TCC4_DMAC_ID_MC_SIZE        2
+#define TCC4_DMAC_ID_OVF            41       // DMA overflow/underflow/retrigger trigger
+#define TCC4_DTI                    0        // Dead-Time-Insertion feature implemented
+#define TCC4_EXT                    0        // Coding of implemented extended features
+#define TCC4_GCLK_ID                38       // Index of Generic Clock
+#define TCC4_MASTER_SLAVE_MODE      0        // TCC type 0 : NA, 1 : Master, 2 : Slave
+#define TCC4_OTMX                   0        // Output Matrix feature implemented
+#define TCC4_OW_NUM                 2        // Number of Output Waveforms
+#define TCC4_PG                     0        // Pattern Generation feature implemented
+#define TCC4_SIZE                   16      
+#define TCC4_SWAP                   0        // DTI outputs swap feature implemented
+
+#endif /* _SAMD51_TCC4_INSTANCE_ */