Build STM32F7 with single-point FPU.

examples/build_system/cmake/cpu/cortex-m7-fpsp.cmake

@@ -0,0 +1,25 @@
+if (TOOLCHAIN STREQUAL "gcc")
+  set(TOOLCHAIN_COMMON_FLAGS
+    -mthumb
+    -mcpu=cortex-m7
+    -mfloat-abi=hard
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "clang")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --target=arm-none-eabi
+    -mcpu=cortex-m7
+    -mfpu=fpv5-sp-d16
+    )
+  set(FREERTOS_PORT GCC_ARM_CM7 CACHE INTERNAL "")
+
+elseif (TOOLCHAIN STREQUAL "iar")
+  set(TOOLCHAIN_COMMON_FLAGS
+    --cpu cortex-m7
+    --fpu VFPv5_sp
+    )
+  set(FREERTOS_PORT IAR_ARM_CM7 CACHE INTERNAL "")
+
+endif ()

examples/build_system/make/cpu/cortex-m7-fpsp.mk

@@ -0,0 +1,27 @@
+ifeq ($(TOOLCHAIN),gcc)
+  CFLAGS += \
+    -mthumb \
+    -mcpu=cortex-m7 \
+    -mfloat-abi=hard \
+    -mfpu=fpv5-sp-d16 \
+
+else ifeq ($(TOOLCHAIN),clang)
+  CFLAGS += \
+	  --target=arm-none-eabi \
+	  -mcpu=cortex-m7 \
+	  -mfpu=fpv5-sp-d16 \
+
+else ifeq ($(TOOLCHAIN),iar)
+  CFLAGS += \
+  	--cpu cortex-m7 \
+  	--fpu VFPv5_sp \
+
+  ASFLAGS += \
+		--cpu cortex-m7 \
+		--fpu VFPv5_sp \
+
+else
+  $(error "TOOLCHAIN is not supported")
+endif
+
+FREERTOS_PORTABLE_SRC ?= $(FREERTOS_PORTABLE_PATH)/ARM_CM7/r0p1

hw/bsp/stm32f7/family.cmake

@@ -11,7 +11,7 @@ set(CMSIS_5 ${TOP}/lib/CMSIS_5)
 include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
-set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
+set(CMAKE_SYSTEM_PROCESSOR cortex-m7-fpsp CACHE INTERNAL "System Processor")
 set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32F7 CACHE INTERNAL "")

hw/bsp/stm32f7/family.mk

@@ -6,7 +6,7 @@ ST_CMSIS = hw/mcu/st/cmsis_device_$(ST_FAMILY)
 ST_HAL_DRIVER = hw/mcu/st/stm32$(ST_FAMILY)xx_hal_driver
 
 include $(TOP)/$(BOARD_PATH)/board.mk
-CPU_CORE ?= cortex-m7
+CPU_CORE ?= cortex-m7-fpsp
 
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