diff --git a/examples/build_system/cmake/cpu/arm1176jzf-s.cmake b/examples/build_system/cmake/cpu/arm1176jzf-s.cmake
index 11bb52f30..8029e3987 100644
--- a/examples/build_system/cmake/cpu/arm1176jzf-s.cmake
+++ b/examples/build_system/cmake/cpu/arm1176jzf-s.cmake
@@ -1,6 +1,7 @@
 if (TOOLCHAIN STREQUAL "gcc")
   set(TOOLCHAIN_COMMON_FLAGS
     -mcpu=arm1176jzf-s
+    -ffreestanding
   )
   # set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
@@ -10,6 +11,7 @@ elseif (TOOLCHAIN STREQUAL "clang")
     -mcpu=arm1176jzf-s
     -mfpu=none
     -mfloat-abi=soft
+    -ffreestanding
   )
   #set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
 
diff --git a/examples/build_system/cmake/cpu/arm926ej-s.cmake b/examples/build_system/cmake/cpu/arm926ej-s.cmake
new file mode 100644
index 000000000..c19b9f8a8
--- /dev/null
+++ b/examples/build_system/cmake/cpu/arm926ej-s.cmake
@@ -0,0 +1,21 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mcpu=arm926ej-s
+    -ffreestanding
+    )
+  # set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=arm926ej-s
+    -mfpu=none
+    -mfloat-abi=soft
+    -ffreestanding
+    )
+  #set(FREERTOS_PORT GCC_ARM_CM0 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  message(FATAL_ERROR "IAR not supported")
+
+endif ()
diff --git a/examples/build_system/make/cpu/arm926ej-s.mk b/examples/build_system/make/cpu/arm926ej-s.mk
new file mode 100644
index 000000000..5b84f514f
--- /dev/null
+++ b/examples/build_system/make/cpu/arm926ej-s.mk
@@ -0,0 +1,9 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -mcpu=arm926ej-s \
+
+else ifeq ($(TOOLCHAIN),iar)
+	#CFLAGS += --cpu cortex-a53
+	#ASFLAGS += --cpu cortex-a53
+
+endif
diff --git a/hw/bsp/f1c100s/board.h b/hw/bsp/f1c100s/board.h
deleted file mode 100644
index 0ef9a1700..000000000
--- a/hw/bsp/f1c100s/board.h
+++ /dev/null
@@ -1 +0,0 @@
-// Nothing valuable here
diff --git a/hw/bsp/f1c100s/board.mk b/hw/bsp/f1c100s/board.mk
deleted file mode 100644
index 3596e5414..000000000
--- a/hw/bsp/f1c100s/board.mk
+++ /dev/null
@@ -1,52 +0,0 @@
-MCU_DIR = hw/mcu/allwinner/f1c100s
-DEPS_SUBMODULES += hw/mcu/allwinner
-DEFINES += -D__ARM32_ARCH__=5 -D__ARM926EJS__
-
-CFLAGS += \
-  -ffreestanding \
-  -std=gnu99 \
-  -march=armv5te \
-  -mtune=arm926ej-s \
-  -mfloat-abi=soft \
-  -marm \
-  -mno-thumb-interwork \
-  -Wno-unused-parameter \
-  -Wno-float-equal \
-  -DCFG_TUSB_MCU=OPT_MCU_F1C100S \
-  -Wno-error=cast-align \
-  -Wno-error=address-of-packed-member \
-  $(DEFINES)
-
-LD_FILE = hw/mcu/allwinner/f1c100s/f1c100s.ld
-# TODO may skip nanolib
-LDFLAGS += -nostdlib -lgcc -specs=nosys.specs -specs=nano.specs
-
-SRC_C += \
-	src/portable/sunxi/dcd_sunxi_musb.c \
-	$(MCU_DIR)/machine/sys-uart.c \
-	$(MCU_DIR)/machine/exception.c \
-	$(MCU_DIR)/machine/sys-clock.c \
-	$(MCU_DIR)/machine/sys-copyself.c \
-	$(MCU_DIR)/machine/sys-dram.c \
-	$(MCU_DIR)/machine/sys-mmu.c \
-	$(MCU_DIR)/machine/sys-spi-flash.c \
-	$(MCU_DIR)/machine/f1c100s-intc.c \
-	$(MCU_DIR)/lib/malloc.c \
-	$(MCU_DIR)/lib/printf.c
-
-SRC_S += \
-  $(MCU_DIR)/machine/start.S \
-	$(MCU_DIR)/lib/memcpy.S \
-	$(MCU_DIR)/lib/memset.S
-
-INC += \
-	$(TOP)/$(MCU_DIR)/include \
-	$(TOP)/$(BOARD_PATH)
-
-# flash target using xfel
-flash: flash-xfel
-
-exec: $(BUILD)/$(PROJECT).bin
-	xfel ddr
-	xfel write 0x80000000 $<
-	xfel exec 0x80000000
diff --git a/hw/bsp/f1c100s/boards/f1c100s/board.cmake b/hw/bsp/f1c100s/boards/f1c100s/board.cmake
new file mode 100644
index 000000000..98ed56c57
--- /dev/null
+++ b/hw/bsp/f1c100s/boards/f1c100s/board.cmake
@@ -0,0 +1,3 @@
+function(update_board TARGET)
+  # nothing to do
+endfunction()
diff --git a/hw/bsp/f1c100s/boards/f1c100s/board.h b/hw/bsp/f1c100s/boards/f1c100s/board.h
new file mode 100644
index 000000000..3b56a3a57
--- /dev/null
+++ b/hw/bsp/f1c100s/boards/f1c100s/board.h
@@ -0,0 +1,6 @@
+#ifndef BOARD_H
+#define BOARD_H
+
+// Nothing valuable here
+
+#endif
diff --git a/hw/bsp/f1c100s/boards/f1c100s/board.mk b/hw/bsp/f1c100s/boards/f1c100s/board.mk
new file mode 100644
index 000000000..be830bd8c
--- /dev/null
+++ b/hw/bsp/f1c100s/boards/f1c100s/board.mk
@@ -0,0 +1 @@
+# nothing to do
diff --git a/hw/bsp/f1c100s/f1c100s.c b/hw/bsp/f1c100s/family.c
similarity index 78%
rename from hw/bsp/f1c100s/f1c100s.c
rename to hw/bsp/f1c100s/family.c
index 272b756f2..6df4a0ed8 100644
--- a/hw/bsp/f1c100s/f1c100s.c
+++ b/hw/bsp/f1c100s/family.c
@@ -39,10 +39,9 @@ extern void sys_uart_putc(char c);
 
 static void timer_init(void);
 
-void board_init(void)
-{
+void board_init(void) {
   arch_local_irq_disable();
-	do_init_mem_pool();
+  do_init_mem_pool();
   f1c100s_intc_init();
   timer_init();
   printf("Timer INIT done\n");
@@ -50,42 +49,38 @@ void board_init(void)
 }
 
 // No LED, no button
-void board_led_write(bool state)
-{
-
+void board_led_write(bool state) {
+  (void) state;
 }
 
-uint32_t board_button_read(void)
-{
+uint32_t board_button_read(void) {
   return 0;
 }
 
-int board_uart_read(uint8_t* buf, int len)
-{
+int board_uart_read(uint8_t* buf, int len) {
+  (void) buf;
+  (void) len;
   return 0;
 }
 
-int board_uart_write(void const * buf, int len)
-{
+int board_uart_write(void const* buf, int len) {
   int txsize = len;
   while (txsize--) {
-    sys_uart_putc(*(uint8_t const*)buf);
+    sys_uart_putc(*(uint8_t const*) buf);
     buf++;
   }
   return len;
 }
 
-#if CFG_TUSB_OS  == OPT_OS_NONE
+#if CFG_TUSB_OS == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
 
-uint32_t board_millis(void)
-{
+uint32_t board_millis(void) {
   return system_ticks;
 }
 
-static void timer_handler(void)
-{
-  volatile uint32_t *temp_addr = (uint32_t *)(0x01C20C00 + 0x04);
+static void timer_handler(void) {
+  volatile uint32_t* temp_addr = (uint32_t*) (0x01C20C00 + 0x04);
 
   /* clear timer */
   *temp_addr |= 0x01;
@@ -95,36 +90,37 @@ static void timer_handler(void)
 
 static void timer_init(void) {
   uint32_t temp;
-  volatile uint32_t *temp_addr;
+  volatile uint32_t* temp_addr;
 
   /* reload value */
   temp = 12000000 / 1000;
-  temp_addr = (uint32_t *)(0x01C20C00 + 0x14);
+  temp_addr = (uint32_t*) (0x01C20C00 + 0x14);
   *temp_addr = temp;
 
   /* continuous | /2 | 24Mhz |  reload*/
   temp = (0x00 << 7) | (0x01 << 4) | (0x01 << 2) | (0x00 << 1);
-  temp_addr = (uint32_t *)(0x01C20C00 + 0x10);
+  temp_addr = (uint32_t*) (0x01C20C00 + 0x10);
   *temp_addr &= 0xffffff00;
   *temp_addr |= temp;
 
   /* open timer irq */
   temp = 0x01 << 0;
-  temp_addr = (uint32_t *)(0x01C20C00);
+  temp_addr = (uint32_t*) (0x01C20C00);
   *temp_addr |= temp;
 
   /* set init value */
-  temp_addr = (uint32_t *)(0x01C20C00 + 0x18);
+  temp_addr = (uint32_t*) (0x01C20C00 + 0x18);
   *temp_addr = 0;
 
   /* begin run timer */
   temp = 0x01 << 0;
-  temp_addr = (uint32_t *)(0x01C20C00 + 0x10);
+  temp_addr = (uint32_t*) (0x01C20C00 + 0x10);
   *temp_addr |= temp;
 
   f1c100s_intc_set_isr(F1C100S_IRQ_TIMER0, timer_handler);
   f1c100s_intc_enable_irq(F1C100S_IRQ_TIMER0);
 }
+
 #else
 static void timer_init(void) { }
 #endif
diff --git a/hw/bsp/f1c100s/family.cmake b/hw/bsp/f1c100s/family.cmake
new file mode 100644
index 000000000..0903a0143
--- /dev/null
+++ b/hw/bsp/f1c100s/family.cmake
@@ -0,0 +1,114 @@
+include_guard()
+
+set(SDK_DIR ${TOP}/hw/mcu/allwinner/f1c100s)
+
+include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
+
+# toolchain set up
+set(CMAKE_SYSTEM_PROCESSOR arm926ej-s CACHE INTERNAL "System Processor")
+set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
+
+set(FAMILY_MCUS F1C100S CACHE INTERNAL "")
+
+#------------------------------------
+# BOARD_TARGET
+#------------------------------------
+# only need to be built ONCE for all examples
+function(add_board_target BOARD_TARGET)
+  if (TARGET ${BOARD_TARGET})
+    return()
+  endif ()
+
+  # LD_FILE and STARTUP_FILE can be defined in board.cmake
+  if (NOT DEFINED LD_FILE_GNU)
+    set(LD_FILE_GNU ${SDK_DIR}/f1c100s.ld)
+  endif ()
+  set(LD_FILE_Clang ${LD_FILE_GNU})
+
+  if (NOT DEFINED STARTUP_FILE_GNU)
+    set(STARTUP_FILE_GNU ${SDK_DIR}/machine/start.S)
+  endif ()
+  set(STARTUP_FILE_Clang ${STARTUP_FILE_GNU})
+
+  add_library(${BOARD_TARGET} STATIC
+    ${SDK_DIR}/lib/malloc.c
+    ${SDK_DIR}/lib/printf.c
+    ${SDK_DIR}/lib/memcpy.S
+    ${SDK_DIR}/lib/memset.S
+    ${SDK_DIR}/machine/sys-uart.c
+    ${SDK_DIR}/machine/exception.c
+    ${SDK_DIR}/machine/sys-clock.c
+    ${SDK_DIR}/machine/sys-copyself.c
+    ${SDK_DIR}/machine/sys-dram.c
+    ${SDK_DIR}/machine/sys-mmu.c
+    ${SDK_DIR}/machine/sys-spi-flash.c
+    ${SDK_DIR}/machine/f1c100s-intc.c
+    ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
+    )
+
+  target_compile_definitions(${BOARD_TARGET} PUBLIC
+    __ARM32_ARCH__=5
+    )
+  target_include_directories(${BOARD_TARGET} PUBLIC
+    ${SDK_DIR}/include
+    )
+
+  update_board(${BOARD_TARGET})
+
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--script=${LD_FILE_GNU}"
+      -lgcc
+      --specs=nosys.specs --specs=nano.specs
+      "LINKER:--defsym=__bss_end__=__bss_end"
+      "LINKER:--defsym=__bss_start__=__bss_start"
+      "LINKER:--defsym=end=__bss_end"
+      )
+  elseif (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--script=${LD_FILE_GNU}"
+      )
+  elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--config=${LD_FILE_IAR}"
+      )
+  endif ()
+endfunction()
+
+
+#------------------------------------
+# Functions
+#------------------------------------
+function(family_configure_example TARGET RTOS)
+  family_configure_common(${TARGET} ${RTOS})
+
+  # Board target
+  add_board_target(board_${BOARD})
+
+  #---------- Port Specific ----------
+  # These files are built for each example since it depends on example's tusb_config.h
+  target_sources(${TARGET} PUBLIC
+    # BSP
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/family.c
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../board.c
+    )
+  target_include_directories(${TARGET} PUBLIC
+    # family, hw, board
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}
+    )
+
+  # Add TinyUSB target and port source
+  family_add_tinyusb(${TARGET} OPT_MCU_F1C100S ${RTOS})
+  target_sources(${TARGET}-tinyusb PRIVATE
+    ${TOP}/src/portable/sunxi/dcd_sunxi_musb.c
+    )
+  target_link_libraries(${TARGET}-tinyusb PUBLIC board_${BOARD})
+
+  # Link dependencies
+  target_link_libraries(${TARGET} PUBLIC board_${BOARD} ${TARGET}-tinyusb)
+
+  # Flashing
+  family_flash_jlink(${TARGET})
+endfunction()
diff --git a/hw/bsp/f1c100s/family.mk b/hw/bsp/f1c100s/family.mk
new file mode 100644
index 000000000..be416e72e
--- /dev/null
+++ b/hw/bsp/f1c100s/family.mk
@@ -0,0 +1,58 @@
+SDK_DIR = hw/mcu/allwinner/f1c100s
+
+include $(TOP)/$(BOARD_PATH)/board.mk
+CPU_CORE ?= arm926ej-s
+
+#CFLAGS += \
+#  -march=armv5te \
+#  -mtune=arm926ej-s \
+#  -mfloat-abi=soft \
+#  -marm \
+
+CFLAGS += \
+  -ffreestanding \
+  -std=gnu99 \
+  -mno-thumb-interwork \
+  -D__ARM32_ARCH__=5 \
+  -D__ARM926EJS__ \
+  -Wno-float-equal \
+  -Wno-unused-parameter \
+  -DCFG_TUSB_MCU=OPT_MCU_F1C100S \
+  -Wno-error=array-bounds \
+
+LD_FILE = ${SDK_DIR}/f1c100s.ld
+
+# TODO may skip nanolib
+LDFLAGS += \
+  -nostdlib -lgcc \
+  --specs=nosys.specs --specs=nano.specs \
+
+SRC_C += \
+	src/portable/sunxi/dcd_sunxi_musb.c \
+	${SDK_DIR}/machine/sys-uart.c \
+	${SDK_DIR}/machine/exception.c \
+	${SDK_DIR}/machine/sys-clock.c \
+	${SDK_DIR}/machine/sys-copyself.c \
+	${SDK_DIR}/machine/sys-dram.c \
+	${SDK_DIR}/machine/sys-mmu.c \
+	${SDK_DIR}/machine/sys-spi-flash.c \
+	${SDK_DIR}/machine/f1c100s-intc.c \
+	${SDK_DIR}/lib/malloc.c \
+	${SDK_DIR}/lib/printf.c
+
+SRC_S += \
+  ${SDK_DIR}/machine/start.S \
+	${SDK_DIR}/lib/memcpy.S \
+	${SDK_DIR}/lib/memset.S
+
+INC += \
+	$(TOP)/${SDK_DIR}/include \
+	$(TOP)/$(BOARD_PATH)
+
+# flash target using xfel
+flash: flash-xfel
+
+exec: $(BUILD)/$(PROJECT).bin
+	xfel ddr
+	xfel write 0x80000000 $<
+	xfel exec 0x80000000
diff --git a/src/portable/sunxi/dcd_sunxi_musb.c b/src/portable/sunxi/dcd_sunxi_musb.c
index 6cc1975a8..6f36ad441 100644
--- a/src/portable/sunxi/dcd_sunxi_musb.c
+++ b/src/portable/sunxi/dcd_sunxi_musb.c
@@ -35,7 +35,9 @@
 #include <f1c100s-irq.h>
 #include <device/dcd.h>
 #include "musb_def.h"
-#include "bsp/board.h"
+
+//#include "bsp/board_api.h"
+extern uint32_t board_millis(void); // TODO remove
 
 typedef uint32_t u32;
 typedef uint16_t u16;
@@ -58,7 +60,7 @@ typedef struct TU_ATTR_PACKED
 
 typedef struct
 {
-  tusb_control_request_t setup_packet;
+  CFG_TUD_MEM_ALIGN tusb_control_request_t setup_packet;
   uint16_t     remaining_ctrl; /* The number of bytes remaining in data stage of control transfer. */
   int8_t       status_out;
   pipe_state_t pipe0;
@@ -350,7 +352,7 @@ static void USBC_INT_DisableRxEp(u8 ep_index)
  * INTERNAL FUNCTION DECLARATION
  *------------------------------------------------------------------*/
 
-static dcd_data_t _dcd;
+CFG_TUD_MEM_ALIGN static dcd_data_t _dcd;
 
 static inline free_block_t *find_containing_block(free_block_t *beg, free_block_t *end, uint_fast16_t addr)
 {
@@ -560,7 +562,7 @@ static void pipe_read_write_packet_ff(tu_fifo_t *f, volatile void *fifo, unsigne
 
 static void process_setup_packet(uint8_t rhport)
 {
-  uint32_t *p = (uint32_t*)&_dcd.setup_packet;
+  uint32_t *p = (uint32_t*)(uintptr_t) &_dcd.setup_packet;
   p[0]        = USBC_Readl(USBC_REG_EPFIFO0(USBC0_BASE));
   p[1]        = USBC_Readl(USBC_REG_EPFIFO0(USBC0_BASE));
 
@@ -594,7 +596,7 @@ static bool handle_xfer_in(uint_fast8_t ep_addr)
   if (len) {
     volatile void* addr = (volatile void*)(USBC_REG_EPFIFO1(USBC0_BASE) + (epnum_minus1 << 2));
     if (_dcd.pipe_buf_is_fifo[TUSB_DIR_IN] & TU_BIT(epnum_minus1)) {
-      pipe_read_write_packet_ff((tu_fifo_t *)buf, addr, len, TUSB_DIR_IN);
+      pipe_read_write_packet_ff((tu_fifo_t *)(uintptr_t) buf, addr, len, TUSB_DIR_IN);
     } else {
       pipe_write_packet(buf, addr, len);
       pipe->buf       = buf + len;
@@ -622,7 +624,7 @@ static bool handle_xfer_out(uint_fast8_t ep_addr)
   if (len) {
     volatile void* addr = (volatile void*)(USBC_REG_EPFIFO1(USBC0_BASE) + (epnum_minus1 << 2));
     if (_dcd.pipe_buf_is_fifo[TUSB_DIR_OUT] & TU_BIT(epnum_minus1)) {
-      pipe_read_write_packet_ff((tu_fifo_t *)buf, addr, len, TUSB_DIR_OUT);
+      pipe_read_write_packet_ff((tu_fifo_t *)(uintptr_t )buf, addr, len, TUSB_DIR_OUT);
     } else {
       pipe_read_packet(buf, addr, len);
       pipe->buf       = buf + len;