Hello,
unfortunately we do not have a ready-to-use display driver for the HX8347 graphics controller.
Our Build Environment for STM32F407 provides a set of display drivers (ILI9325, ILI9341, SSD1963 and SSD2119) that can be used as templates for your own hardware. One of these display drivers can be copied and adapted according the HX8347 specification to support the HX8347 protocoll.
Nevertheless, a working hardware is the prerequisite to make this implementation...