My fork: github.com/deividAlfa/ST7789-STM32 Uses UGUI, custom fonts, pictures, windows, huge performance gains!

[deividAlfa]

Given this repository seems dead, I forked and further enhanced it.

• HUGE performance gains. Up to 13x faster in some drawing tasks.
• Able to use DMA (Can be disabled) for even faster speeds.
• Interfaced uGUI library, several modifcations for best performance.
• You can easily add bitmaps and custom fonts...
• Demos for STM32F103, STM32F411 and STM32F407.

https://github.com/deividAlfa/ST7789-STM32

[vinothkannanagva]

(page 260 /ST7789V2 datasheet sitronix)
9.2.1 RAMCTRL (B0h): RAM Control

can I increase refresh rate of LCD by doing changes in above registers ??

[deividAlfa]

Yes, but in FRCTRL1 (B3h), not in RAMCTRL (B0h).
You can also tweak the porch timing in PORCTRL (B2h), lowering it to the minimum increases the refresh rate 7%.
Check st7789.c, ST7789_Init, read the comments, eveeyth is already there.