diff --git a/.cproject b/.cproject
index 48966ba..1410f48 100644
--- a/.cproject
+++ b/.cproject
@@ -62,6 +62,8 @@
 									<listOptionValue builtIn="false" value="../Drivers/CMSIS/Device/ST/STM32F4xx/Include"/>
 									<listOptionValue builtIn="false" value="../Drivers/STM32F4xx_HAL_Driver/Inc/Legacy"/>
 									<listOptionValue builtIn="false" value="../App"/>
+									<listOptionValue builtIn="false" value="../platforms/firmware"/>
+									<listOptionValue builtIn="false" value="../components"/>
 								</option>
 								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols.1413855680" name="Define symbols (-D)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols" useByScannerDiscovery="false" valueType="definedSymbols">
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
@@ -100,6 +102,8 @@
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Src"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Startup"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="components"/>
+						<entry excluding="test" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="platforms"/>
 					</sourceEntries>
 				</configuration>
 			</storageModule>
@@ -166,6 +170,8 @@
 									<listOptionValue builtIn="false" value="../Drivers/CMSIS/Device/ST/STM32F4xx/Include"/>
 									<listOptionValue builtIn="false" value="../Drivers/STM32F4xx_HAL_Driver/Inc/Legacy"/>
 									<listOptionValue builtIn="false" value="../App"/>
+									<listOptionValue builtIn="false" value="../platforms/firmware"/>
+									<listOptionValue builtIn="false" value="../components"/>
 								</option>
 								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols.1891229407" name="Define symbols (-D)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.cpp.compiler.option.definedsymbols" useByScannerDiscovery="false" valueType="definedSymbols">
 									<listOptionValue builtIn="false" value="USE_FULL_LL_DRIVER"/>
@@ -204,6 +210,8 @@
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Src"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Startup"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="components"/>
+						<entry excluding="test" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="platforms"/>
 					</sourceEntries>
 				</configuration>
 			</storageModule>
diff --git a/components/f4ll_cpp/dmahelper.cpp b/components/f4ll_cpp/dmahelper.cpp
new file mode 100644
index 0000000..71e6fa1
--- /dev/null
+++ b/components/f4ll_cpp/dmahelper.cpp
@@ -0,0 +1,82 @@
+/*
+ * dma_helper.c
+ *
+ *  Created on: Sep 18, 2019
+ *      Author: abody
+ */
+#include <f4ll_cpp/dmahelper.h>
+#ifndef MOCKABLE
+#define MOCKABLE(x) x
+#endif
+
+DmaHelper::DmaHelper(DMA_TypeDef *dma, uint32_t stream)
+{
+	m_dma = dma;
+	m_stream = stream;
+	m_isReg = GetIsReg(dma, stream);
+	m_ifcReg = GetIfcReg(dma, stream);
+	m_feMask = GetFeMask(stream);
+	m_dmeMask = GetDmeMask(stream);
+	m_teMask = GetTeMask(stream);
+	m_htMask = GetHtMask(stream);
+	m_tcMask = GetTcMask(stream);
+}
+
+volatile uint32_t* DmaHelper::GetIsReg(DMA_TypeDef *dma, uint32_t stream)
+{
+	if(dma == DMA1)
+		return (stream < LL_DMA_STREAM_4) ? &DMA1->LISR : &DMA1->HISR;
+	else
+		return (stream < LL_DMA_STREAM_4) ? &DMA2->LISR : &DMA2->HISR;
+}
+
+
+volatile uint32_t* DmaHelper::GetIfcReg(DMA_TypeDef *dma, uint32_t stream)
+{
+	if(dma == DMA1)
+		return (stream < LL_DMA_STREAM_4) ? &DMA1->LIFCR : &DMA1->HIFCR;
+	else
+		return (stream < LL_DMA_STREAM_4) ? &DMA2->LIFCR : &DMA2->HIFCR;
+}
+
+uint32_t DmaHelper::GetFeMask(uint32_t stream)
+{
+	static const uint32_t feMasks[8] = {
+		DMA_LISR_FEIF0, DMA_LISR_FEIF1, DMA_LISR_FEIF2, DMA_LISR_FEIF3, DMA_HISR_FEIF4, DMA_HISR_FEIF5, DMA_HISR_FEIF6, DMA_HISR_FEIF7
+	};
+	return feMasks[stream];
+}
+
+uint32_t DmaHelper::GetDmeMask(uint32_t stream)
+{
+	static const uint32_t dmeMasks[8] = {
+		DMA_LISR_DMEIF0, DMA_LISR_DMEIF1, DMA_LISR_DMEIF2, DMA_LISR_DMEIF3, DMA_HISR_DMEIF4, DMA_HISR_DMEIF5, DMA_HISR_DMEIF6, DMA_HISR_DMEIF7
+	};
+	return dmeMasks[stream];
+}
+
+uint32_t DmaHelper::GetTeMask(uint32_t stream)
+{
+	static const uint32_t teMasks[8] = {
+		DMA_LISR_TEIF0, DMA_LISR_TEIF1, DMA_LISR_TEIF2, DMA_LISR_TEIF3, DMA_HISR_TEIF4, DMA_HISR_TEIF5, DMA_HISR_TEIF6, DMA_HISR_TEIF7
+	};
+	return teMasks[stream];
+}
+
+uint32_t DmaHelper::GetHtMask(uint32_t stream)
+{
+	static const uint32_t htMasks[8] = {
+		DMA_LISR_HTIF0, DMA_LISR_HTIF1, DMA_LISR_HTIF2, DMA_LISR_HTIF3, DMA_HISR_HTIF4, DMA_HISR_HTIF5, DMA_HISR_HTIF6, DMA_HISR_HTIF7
+	};
+	return htMasks[stream];
+}
+
+uint32_t DmaHelper::GetTcMask(uint32_t stream)
+{
+	static const uint32_t tcMasks[8] = {
+		DMA_LISR_TCIF0, DMA_LISR_TCIF1, DMA_LISR_TCIF2, DMA_LISR_TCIF3, DMA_HISR_TCIF4, DMA_HISR_TCIF5, DMA_HISR_TCIF6, DMA_HISR_TCIF7
+	};
+
+	return tcMasks[stream];
+}
+
diff --git a/components/f4ll_cpp/dmahelper.h b/components/f4ll_cpp/dmahelper.h
new file mode 100644
index 0000000..038872b
--- /dev/null
+++ b/components/f4ll_cpp/dmahelper.h
@@ -0,0 +1,52 @@
+/*
+ * dma_helper.h
+ *
+ *  Created on: Sep 18, 2019
+ *      Author: abody
+ */
+
+#ifndef DMA_HELPER_H_
+#define DMA_HELPER_H_
+#include <inttypes.h>
+#include <platform/dma_ll.h>
+
+#ifndef DECLARE_MOCK
+#define DECLARE_MOCK(x)
+#endif
+
+class DmaHelper {
+public:
+	DmaHelper(DMA_TypeDef *dma, uint32_t stream);
+	volatile uint32_t* GetIsReg(DMA_TypeDef *dma, uint32_t stream);
+	volatile uint32_t* GetIfcReg(DMA_TypeDef *dma, uint32_t stream);
+	uint32_t GetDmeMask(uint32_t stream);
+	uint32_t GetTeMask(uint32_t stream);
+	uint32_t GetHtMask(uint32_t stream);
+	uint32_t GetTcMask(uint32_t stream);
+	uint32_t GetFeMask(uint32_t stream);
+
+private:
+	DMA_TypeDef			*m_dma;
+	uint32_t 			m_stream;
+	volatile uint32_t	*m_isReg;
+	volatile uint32_t	*m_ifcReg;
+	uint32_t			m_feMask;
+	uint32_t			m_dmeMask;
+	uint32_t			m_teMask;
+	uint32_t			m_htMask;
+	uint32_t			m_tcMask;
+};
+
+
+#ifdef UNITTEST
+DECLARE_MOCK(Dma_GetIsReg);
+DECLARE_MOCK(Dma_GetIfcReg);
+DECLARE_MOCK(Dma_GetDmeMask);
+DECLARE_MOCK(Dma_GetTeMask);
+DECLARE_MOCK(Dma_GetHtMask);
+DECLARE_MOCK(Dma_GetTcMask);
+DECLARE_MOCK(Dma_GetFeMask);
+DECLARE_MOCK(Dma_Init);
+#endif
+
+#endif /* DMA_HELPER_H_ */
diff --git a/platforms/firmware/component.mk b/platforms/firmware/component.mk
new file mode 100644
index 0000000..c7741b4
--- /dev/null
+++ b/platforms/firmware/component.mk
@@ -0,0 +1,10 @@
+SELF_DIR := $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
+REL_DIR := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
+ifeq ($(MKDBG), 1)
+$(info >>> $(REL_DIR)/component.mk)
+endif
+#$(eval C_SOURCES += $(wildcard $(REL_DIR)/*.c))
+$(eval COMMON_INCLUDES += -I$(REL_DIR))
+ifeq ($(MKDBG), 1)
+$(info <<<)
+endif
diff --git a/platforms/firmware/platform/crc_ll.h b/platforms/firmware/platform/crc_ll.h
new file mode 100644
index 0000000..f10b7bc
--- /dev/null
+++ b/platforms/firmware/platform/crc_ll.h
@@ -0,0 +1,6 @@
+#ifndef __PLATFORM_CRC_LL_H_INCLUDED
+#define __PLATFORM_CRC_LL_H_INCLUDED
+
+#include "crc.h"
+
+#endif  //  __PLATFORM_CRC_LL_H_INCLUDED
diff --git a/platforms/firmware/platform/dma_ll.h b/platforms/firmware/platform/dma_ll.h
new file mode 100644
index 0000000..f17125a
--- /dev/null
+++ b/platforms/firmware/platform/dma_ll.h
@@ -0,0 +1,6 @@
+#ifndef __PLATFORM_DMA_LL_H_INCLUDED
+#define __PLATFORM_DMA_LL_H_INCLUDED
+
+#include "stm32f4xx_ll_dma.h"
+
+#endif  //  __PLATFORM_DMA_LL_H_INCLUDED
diff --git a/platforms/firmware/platform/mockme.h b/platforms/firmware/platform/mockme.h
new file mode 100644
index 0000000..6b98cca
--- /dev/null
+++ b/platforms/firmware/platform/mockme.h
@@ -0,0 +1,97 @@
+/*
+ * mockme.h
+ *
+ *  Created on: Nov 25, 2019
+ *      Author: abody
+ */
+
+#ifndef PLATFORM_MOCKME_H_
+#define PLATFORM_MOCKME_H_
+
+//#define TOSTR(x) #x
+#ifdef __cplusplus
+#define DECLARE_MOCK(F) \
+	extern decltype(F) F ## __, *test_ ## F
+#else
+#define DECLARE_MOCK(F) \
+	extern typeof(F) F ## __, *test_ ## F
+#endif
+
+#define MOCKABLE(F) __attribute__((section(\
+	".bss\n\t"\
+	".globl test_" #F "\n\t"\
+	".align 4\n\t"\
+	".type	test_" #F ", @object\n\t"\
+	".size	test_" #F ", 4\n"\
+	"test_" #F ":\n\t"\
+	".zero	4\n\t"\
+	".text\n\t"\
+	".p2align 4,,15\n\t"\
+	".globl	" #F "\n\t"\
+	".type	" #F ", @function\n"\
+	#F ":\n\t"\
+	".cfi_startproc\n\t"\
+	"push %edx\n\t"\
+	"push %edx\n\t"\
+	"push %eax\n\t"\
+	"movl test_" #F ", %eax\n\t"\
+	"leal " #F "__, %edx\n\t"\
+	"test %eax, %eax\n\t"\
+	"cmove %edx, %eax\n\t"\
+	"mov %eax, 8(%esp)\n\t"\
+	"pop %eax\n\t"\
+	"pop %edx\n\t"\
+	"ret\n\t"\
+	".cfi_endproc\n\t"\
+	".size	" #F ", .-" #F "\n\t"\
+	".section	.text"))) F ## __
+
+#define DEFINE_MOCK_RET(rettype, fn, decor, ...) \
+	static int fn ## _ ## decor ## _callcount; \
+	static rettype fn ## _ ## decor ## _retval; \
+	static rettype fn ## _ ## decor(__VA_ARGS__) { \
+		++fn ## _ ## decor ## _callcount;
+
+#define DEFINE_MOCK(fn, decor, ...) \
+	static int fn ## _ ## decor ## _callcount; \
+	static void fn ## _ ## decor(__VA_ARGS__) { \
+		++fn ## _ ## decor ## _callcount;
+
+#define RETURN_MOCK(fn, decor, ret) \
+		fn##_##decor##_retval = ret; \
+		return ret; }
+
+#define RETURN_MOCK_PREDEF(fn, decor) \
+		return fn##_##decor##_retval; }
+
+#define LEAVE_MOCK }
+
+#define DEFINE_MOCK_VAR(type, fn, decor, varname) type fn##_##decor##_##varname
+
+#define MOCK_STORE(fn, decor, varname, value) fn##_##decor##_##varname = value
+
+#define MOCK_VAR(fn, decor, varname) fn##_##decor##_##varname
+#define MOCK_CALLCOUNT(fn, decor) fn ## _ ## decor ## _callcount
+
+#ifdef __cplusplus
+namespace mockme {
+template <typename T> class mockguard {
+	T* m_guarded;
+public:
+	mockguard(T* guarded, T testFunc) : m_guarded(guarded) { *m_guarded = testFunc; }
+	~mockguard() { *m_guarded = nullptr; }
+};
+}	//	namespace mockme
+
+#define ACTIVATE_MOCK(fn, decor) \
+		fn ## _ ## decor ## _callcount = 0; \
+		mockme::mockguard<decltype(fn)*> fn ## _ ## decor ## _mockguard(&test_ ## fn, fn ## _ ## decor)
+
+#define ACTIVATE_MOCK_RV(fn, decor, ret) \
+		fn##_##decor##_callcount = 0; \
+		fn##_##decor##_retval = ret; \
+		mockme::mockguard<decltype(fn)*> fn##_##decor##_mockguard(&test_ ## fn, fn##_##decor)
+
+#endif	//	__cplusplus
+
+#endif /* PLATFORM_MOCKME_H_ */
diff --git a/platforms/firmware/platform/usart_ll.h b/platforms/firmware/platform/usart_ll.h
new file mode 100644
index 0000000..52354de
--- /dev/null
+++ b/platforms/firmware/platform/usart_ll.h
@@ -0,0 +1,6 @@
+#ifndef __PLATFORM_USART_LL_H_INCLUDED
+#define __PLATFORM_USART_LL_H_INCLUDED
+
+#include "usart.h"
+
+#endif  //  __PLATFORM_USART_LL_H_INCLUDED