i'm back for ask one help a the community. Few week ago i wrote i had a problem (of velocity communication) to control one graphic display 240*320 with I2CBus . Someone told me i need the use the SPI and i did, with 3 74c595 . Now the problem look the same when i want refresh the display is so slow like more then 3 minuts like with I2CBus. I don't have an oscilloscope for see the signal but i try to change the clock in the SPI configuration and i saw that i can write 1000 or 10000 or 500 and the refresh take the same time.Someone have sone idea ?
Thank you so much