Hi friends,
I have a display 2.4 shield touch screen with the controllers: XPT2046 and spfd5408.
I will very much thank if someone can explain to me how is the comunication with the touch controller?, I can see the pins and I dont know what are the pins of connection with the touch controller?. I have understood that some pins are multiplex as I/O digital with the touch controller connections but I dont know how it works?. what are these pins?. I know that exist a library (drivers) to use with this display but I wish to write my own library in assembly lenguage implementing such drivers for the controllers: XPT2046 and spfd5408.
I only need to know what are the pins of connections with the touch controller? and how it works?, then I will get to write my own drivers.
Again I thank you for the help since now.