STM32 with ssd1963 800x480 display

Hello folks, i am new to this forum, i have started working with the ssd1963 800x480 display with stm32, am failing to get any good results from the display its always blank, i dont know if the problem is on the library or not kindly help me, if anyone has a better library kindly help me with it

Thank you
display_ssd1963.h (8.7 KB)
display_ssd1963.c (26.2 KB)