https://tamanegi.digick.jp/computer-embedded/module/st7735touch/
Arduino_Core_STM32/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/variant_BLACKPILL_F401Cx.h at b4d7bee9373ebf357084fa8f95cf24596184a8e0 · stm32duino/Arduino_Core_STM32
https://github.com/stm32duino/Arduino_Core_STM32/blob/b4d7bee9373ebf357084fa8f95cf24596184a8e0/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/variant_BLACKPILL_F401Cx.h
Arduino_Core_STM32/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/PeripheralPins_BLACKPILL_F401Cx.c at b4d7bee9373ebf357084fa8f95cf24596184a8e0 · stm32duino/Arduino_Core_STM32
https://github.com/stm32duino/Arduino_Core_STM32/blob/b4d7bee9373ebf357084fa8f95cf24596184a8e0/variants/STM32F4xx/F401CC(F-U-Y)_F401C(B-D-E)(U-Y)/PeripheralPins_BLACKPILL_F401Cx.c
