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-rw-r--r--keyboards/handwired/onekey/bluepill_f103c6/rules.mk27
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diff --git a/keyboards/handwired/onekey/bluepill_f103c6/rules.mk b/keyboards/handwired/onekey/bluepill_f103c6/rules.mk
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+++ b/keyboards/handwired/onekey/bluepill_f103c6/rules.mk
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+# MCU name
+MCU = STM32F103
+
+# Bootloader selection
+# Cannot use `BOOTLOADER = stm32duino` due to the need to override
+# `MCU_LDSCRIPT`, therefore all parameters need to be specified here manually.
+OPT_DEFS += -DBOOTLOADER_STM32DUINO
+MCU_LDSCRIPT = STM32F103x6_stm32duino_bootloader
+BOARD = STM32_F103_STM32DUINO
+BOOTLOADER_TYPE = stm32duino
+DFU_ARGS = -d 1EAF:0003 -a 2 -R
+DFU_SUFFIX_ARGS = -v 1EAF -p 0003
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE
+
+# LTO is required to fit the firmware into the available 24K of flash
+LTO_ENABLE = yes
+
+# Disable some features which still don't fit into flash even with LTO
+MOUSEKEY_ENABLE = no
+NKRO_ENABLE = no
+
+# EEPROM emulation not supported yet (need to implement a proper firmware size
+# check first, otherwise the chance of the EEPROM backing store overwriting
+# some part of the firmware code is really high).
+EEPROM_DRIVER = transient