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+## chip/board settings
+# the next two should match the directories in
+# <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+MCU_FAMILY = STM32
+MCU_SERIES = STM32F4xx
+# linker script to use
+# it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+# or <this_dir>/ld/
+MCU_LDSCRIPT = STM32F401xC
+# startup code to use
+# is should exist in <chibios>/os/common/ports/ARMCMx/compilers/GCC/mk/
+MCU_STARTUP = stm32f4xx
+# it should exist either in <chibios>/os/hal/boards/
+# or <this_dir>/boards
+BOARD = BLACKPILL_STM32_F401
+# Cortex version
+# Teensy LC is cortex-m0; Teensy 3.x are cortex-m4
+MCU = cortex-m4
+# ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+ARMV = 7
+USE_FPU = yes
+# Address of the booloader in system memory
+STM32_BOOTLOADER_ADDRESS ?= 0x1FFF0000
+
+# Options to pass to dfu-util when flashing
+DFU_ARGS = -d 0483:df11 -a 0 -s 0x08000000:leave
+DFU_SUFFIX_ARGS = -v 0483 -p df11
+
+# Build Options
+# change yes to no to disable
+#
+KEYBOARD_SHARED_EP = yes