User guide

SFSU - Embedded Systems Tutorial Nano- Electronics & Computing Research Lab

Chapter 5 – Integrating Touch Interface of

T-Pad

Introduction

In this chapter, the ALU will be displayed on T-Pad. Different operation of the ALU is performed by

touch interface. With switches, different numbers can be displayed and their ALU operations are

performed by touching the buttons on the screen.

Hardware

The T-Pad features an 8-inch Amorphous-TFT-LCD panel. The LCD Screen module offers resolution of

(800x600) to provide users the best display quality for developing applications. The LCD panel supports

18-bit parallel RGB data interface.

In this chapter, touch features on the LCD Display are used. Hardware implementation to exploit the

touch features on the TPad:

a) A touch_panel_spi

b) A touch_panel_busy

c)A touch_panel_penirq_n

Character

Buffer DMA