diff --git a/build/.gitignore b/build/.gitignore
deleted file mode 100644
index 8704d08..0000000
--- a/build/.gitignore
+++ /dev/null
@@ -1,6 +0,0 @@
-!.gitignore
-!system_same54.c
-!Makefile
-!gcc/*
-
-*
diff --git a/build/Makefile b/build/Makefile
deleted file mode 100644
index 19d7024..0000000
--- a/build/Makefile
+++ /dev/null
@@ -1,281 +0,0 @@
-################################################################################
-# Automatically-generated file. Do not edit!
-################################################################################
-
-ifdef SystemRoot
-	SHELL = cmd.exe
-	MK_DIR = mkdir
-else
-	ifeq ($(shell uname), Linux)
-		MK_DIR = mkdir -p
-	endif
-
-	ifeq ($(shell uname | cut -d _ -f 1), CYGWIN)
-		MK_DIR = mkdir -p
-	endif
-
-	ifeq ($(shell uname | cut -d _ -f 1), MINGW32)
-		MK_DIR = mkdir -p
-	endif
-
-	ifeq ($(shell uname | cut -d _ -f 1), MINGW64)
-		MK_DIR = mkdir -p
-	endif
-
-	ifeq ($(shell uname | cut -d _ -f 1), DARWIN)
-		MK_DIR = mkdir -p
-	endif
-endif
-
-# List the subdirectories for creating object files
-SUB_DIRS +=  \
- \
-hpl/pm \
-build \
-hpl/osc32kctrl \
-hpl/ramecc \
-hpl/dmac \
-hal/src \
-hpl/mclk \
-hpl/systick \
-hal/utils/src \
-hpl/sercom \
-examples \
-hpl/gclk \
-hpl/oscctrl \
-build/gcc \
-hpl/core \
-hpl/cmcc \
-shared \
-shared/devices \
-shared/drivers \
-shared/util
-
-# List the object files
-OBJS +=  \
-hal/src/hal_io.o \
-hpl/systick/hpl_systick.o \
-hpl/core/hpl_core_m4.o \
-hal/utils/src/utils_syscalls.o \
-hal/src/hal_spi_m_sync.o \
-build/system_same54.o \
-hal/src/hal_delay.o \
-hpl/pm/hpl_pm.o \
-hpl/core/hpl_init.o \
-hpl/gclk/hpl_gclk.o \
-hal/utils/src/utils_list.o \
-hal/utils/src/utils_assert.o \
-hpl/dmac/hpl_dmac.o \
-hpl/oscctrl/hpl_oscctrl.o \
-hal/src/hal_usart_sync.o \
-hpl/mclk/hpl_mclk.o \
-hpl/ramecc/hpl_ramecc.o \
-hal/src/hal_init.o \
-build/gcc/startup_same54.o \
-main.o \
-hpl/osc32kctrl/hpl_osc32kctrl.o \
-examples/driver_examples.o \
-driver_init.o \
-hpl/sercom/hpl_sercom.o \
-hal/src/hal_gpio.o \
-hal/utils/src/utils_event.o \
-hal/src/hal_sleep.o \
-hal/src/hal_cache.o \
-hpl/cmcc/hpl_cmcc.o \
-atmel_start.o \
-hal/src/hal_atomic.o \
-shared/util/pdebug.o
-
-OBJS_AS_ARGS +=  \
-"hal/src/hal_io.o" \
-"hpl/systick/hpl_systick.o" \
-"hpl/core/hpl_core_m4.o" \
-"hal/utils/src/utils_syscalls.o" \
-"hal/src/hal_spi_m_sync.o" \
-"build/system_same54.o" \
-"hal/src/hal_delay.o" \
-"hpl/pm/hpl_pm.o" \
-"hpl/core/hpl_init.o" \
-"hpl/gclk/hpl_gclk.o" \
-"hal/utils/src/utils_list.o" \
-"hal/utils/src/utils_assert.o" \
-"hpl/dmac/hpl_dmac.o" \
-"hpl/oscctrl/hpl_oscctrl.o" \
-"hal/src/hal_usart_sync.o" \
-"hpl/mclk/hpl_mclk.o" \
-"hpl/ramecc/hpl_ramecc.o" \
-"hal/src/hal_init.o" \
-"build/gcc/startup_same54.o" \
-"main.o" \
-"hpl/osc32kctrl/hpl_osc32kctrl.o" \
-"examples/driver_examples.o" \
-"driver_init.o" \
-"hpl/sercom/hpl_sercom.o" \
-"hal/src/hal_gpio.o" \
-"hal/utils/src/utils_event.o" \
-"hal/src/hal_sleep.o" \
-"hal/src/hal_cache.o" \
-"hpl/cmcc/hpl_cmcc.o" \
-"atmel_start.o" \
-"hal/src/hal_atomic.o" \
-"shared/util/pdebug.o"
-
-
-# List the directories containing header files
-DIR_INCLUDES +=  \
--I"../" \
--I"../config" \
--I"../examples" \
--I"../hal/include" \
--I"../hal/utils/include" \
--I"../hpl/cmcc" \
--I"../hpl/core" \
--I"../hpl/dmac" \
--I"../hpl/gclk" \
--I"../hpl/mclk" \
--I"../hpl/osc32kctrl" \
--I"../hpl/oscctrl" \
--I"../hpl/pm" \
--I"../hpl/port" \
--I"../hpl/ramecc" \
--I"../hpl/sercom" \
--I"../hpl/systick" \
--I"../hri" \
--I"../" \
--I"../CMSIS/Core/Include" \
--I"../include" \
--I"../shared" \
--I"../shared/drivers" \
--I"../shared/devices" \
--I"../shared/util"
-
-# List the dependency files
-DEPS := $(OBJS:%.o=%.d)
-
-DEPS_AS_ARGS +=  \
-"hal/utils/src/utils_event.d" \
-"hal/src/hal_io.d" \
-"hpl/ramecc/hpl_ramecc.d" \
-"hpl/systick/hpl_systick.d" \
-"hpl/core/hpl_core_m4.d" \
-"hal/utils/src/utils_syscalls.d" \
-"hal/src/hal_spi_m_sync.d" \
-"hal/utils/src/utils_list.d" \
-"hpl/cmcc/hpl_cmcc.d" \
-"hpl/dmac/hpl_dmac.d" \
-"hal/utils/src/utils_assert.d" \
-"hal/src/hal_delay.d" \
-"hpl/core/hpl_init.d" \
-"hpl/pm/hpl_pm.d" \
-"hpl/gclk/hpl_gclk.d" \
-"build/gcc/startup_same54.d" \
-"hal/src/hal_init.d" \
-"hal/src/hal_usart_sync.d" \
-"hpl/mclk/hpl_mclk.d" \
-"driver_init.d" \
-"hpl/osc32kctrl/hpl_osc32kctrl.d" \
-"main.d" \
-"examples/driver_examples.d" \
-"hal/src/hal_cache.d" \
-"hal/src/hal_sleep.d" \
-"hpl/sercom/hpl_sercom.d" \
-"hal/src/hal_gpio.d" \
-"hal/src/hal_atomic.d" \
-"hpl/oscctrl/hpl_oscctrl.d" \
-"build/system_same54.d" \
-"atmel_start.d" \
-"shared/util/pdebug.d"
-
-OUTPUT_FILE_NAME :=spi_sd_mmc_lib
-QUOTE := "
-OUTPUT_FILE_PATH +=$(OUTPUT_FILE_NAME).elf
-OUTPUT_FILE_PATH_AS_ARGS +=$(OUTPUT_FILE_NAME).elf
-
-vpath %.c ../
-vpath %.s ../
-vpath %.S ../
-
-# All Target
-all: $(SUB_DIRS) $(OUTPUT_FILE_PATH)
-
-# Linker target
-
-$(OUTPUT_FILE_PATH): $(OBJS)
-	@echo Building target: $@
-	@echo Invoking: ARM/GNU Linker
-	$(QUOTE)arm-none-eabi-gcc$(QUOTE) -o $(OUTPUT_FILE_NAME).elf $(OBJS_AS_ARGS) -Wl,--start-group -lm -Wl,--end-group -mthumb \
--Wl,-Map="$(OUTPUT_FILE_NAME).map" --specs=nano.specs -Wl,--gc-sections -mcpu=cortex-m4 \
- \
--T"../build/gcc/same54p20a_flash.ld" \
--L"../build/gcc"
-	@echo Finished building target: $@
-
-	"arm-none-eabi-objcopy" -O binary "$(OUTPUT_FILE_NAME).elf" "$(OUTPUT_FILE_NAME).bin"
-	"arm-none-eabi-objcopy" -O ihex -R .eeprom -R .fuse -R .lock -R .signature  \
-        "$(OUTPUT_FILE_NAME).elf" "$(OUTPUT_FILE_NAME).hex"
-	"arm-none-eabi-objcopy" -j .eeprom --set-section-flags=.eeprom=alloc,load --change-section-lma \
-        .eeprom=0 --no-change-warnings -O binary "$(OUTPUT_FILE_NAME).elf" \
-        "$(OUTPUT_FILE_NAME).eep" || exit 0
-	"arm-none-eabi-objdump" -h -S "$(OUTPUT_FILE_NAME).elf" > "$(OUTPUT_FILE_NAME).lss"
-	"arm-none-eabi-size" "$(OUTPUT_FILE_NAME).elf"
-
-
-# Compiler targets
-
-
-
-
-%.o: %.c
-	@echo Building file: $<
-	@echo ARM/GNU C Compiler
-	$(QUOTE)arm-none-eabi-gcc$(QUOTE) -x c -mthumb -DDEBUG -Os -ffunction-sections -mlong-calls -g3 -Wall -c -std=gnu99 \
--D__SAME54P20A__ -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 \
-$(DIR_INCLUDES) \
--MD -MP -MF "$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" -MT"$(@:%.o=%.o)"  -o "$@" "$<"
-	@echo Finished building: $<
-
-%.o: %.s
-	@echo Building file: $<
-	@echo ARM/GNU Assembler
-	$(QUOTE)arm-none-eabi-as$(QUOTE) -x c -mthumb -DDEBUG -Os -ffunction-sections -mlong-calls -g3 -Wall -c -std=gnu99 \
--D__SAME54P20A__ -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 \
-$(DIR_INCLUDES) \
--MD -MP -MF "$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" -MT"$(@:%.o=%.o)"  -o "$@" "$<"
-	@echo Finished building: $<
-
-%.o: %.S
-	@echo Building file: $<
-	@echo ARM/GNU Preprocessing Assembler
-	$(QUOTE)arm-none-eabi-gcc$(QUOTE) -x c -mthumb -DDEBUG -Os -ffunction-sections -mlong-calls -g3 -Wall -c -std=gnu99 \
--D__SAME54P20A__ -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 \
-$(DIR_INCLUDES) \
--MD -MP -MF "$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" -MT"$(@:%.o=%.o)"  -o "$@" "$<"
-	@echo Finished building: $<
-
-# Detect changes in the dependent files and recompile the respective object files.
-ifneq ($(MAKECMDGOALS),clean)
-ifneq ($(strip $(DEPS)),)
--include $(DEPS)
-endif
-endif
-
-$(SUB_DIRS):
-	$(MK_DIR) "$@"
-
-clean:
-	rm -f $(OBJS_AS_ARGS)
-	rm -f $(OUTPUT_FILE_PATH)
-	rm -f $(DEPS_AS_ARGS)
-	rm -f $(OUTPUT_FILE_NAME).a $(OUTPUT_FILE_NAME).hex $(OUTPUT_FILE_NAME).bin \
-        $(OUTPUT_FILE_NAME).lss $(OUTPUT_FILE_NAME).eep $(OUTPUT_FILE_NAME).map \
-        $(OUTPUT_FILE_NAME).srec
-debug: $(OUTPUT_FILE_NAME).elf
-	@$(QUOTE)arm-none-eabi-gdb$(QUOTE) $(OUTPUT_FILE_NAME).elf -x scripts/debug.gdb
-
-push: $(OUTPUT_FILE_NAME).elf
-	@echo $(QUOTE)$(QUOTE)
-	@echo $(QUOTE)Uploading $(OUTPUT_FILE_NAME).elf...$(QUOTE)
-	@$(QUOTE)arm-none-eabi-gdb$(QUOTE) $(OUTPUT_FILE_NAME).elf -x scripts/push.gdb >/dev/null
-	@echo $(QUOTE)$(QUOTE)$(OUTPUT_FILE_NAME).elf$(QUOTE) uploaded!$(QUOTE)
-	@$(QUOTE)arm-none-eabi-size$(QUOTE) $(QUOTE)$(OUTPUT_FILE_NAME).elf$(QUOTE)
-
diff --git a/build/system_same54.c b/build/system_same54.c
deleted file mode 100644
index 468990e..0000000
--- a/build/system_same54.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/**
- * \file
- *
- * \brief Low-level initialization functions called upon chip startup.
- *
- * Copyright (c) 2019 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
- *
- */
-
-#include "same54.h"
-
-/**
- * Initial system clock frequency. The System RC Oscillator (RCSYS) provides
- *  the source for the main clock at chip startup.
- */
-#define __SYSTEM_CLOCK (48000000)
-
-uint32_t SystemCoreClock = __SYSTEM_CLOCK; /*!< System Clock Frequency (Core Clock)*/
-
-/**
- * Initialize the system
- *
- * @brief  Setup the microcontroller system.
- *         Initialize the System and update the SystemCoreClock variable.
- */
-void SystemInit(void)
-{
-	// Keep the default device state after reset
-	SystemCoreClock = __SYSTEM_CLOCK;
-	return;
-}
-
-/**
- * Update SystemCoreClock variable
- *
- * @brief  Updates the SystemCoreClock with current core Clock
- *         retrieved from cpu registers.
- */
-void SystemCoreClockUpdate(void)
-{
-	// Not implemented
-	SystemCoreClock = __SYSTEM_CLOCK;
-	return;
-}