Here's my simplest FTDI EVE2 TFT display project for STM32F103 (bluepill) running Roger Clark's Arduino_STM32 code base. I included my simple command line Makefile to develop without the Arduino IDE.
# The location where the avr tools (e.g. avr-gcc) are located. Requires a '/' at the end. # Can be empty if all tools are accessable through the search path AVR_TOOLS ...