Arquitetura de telas TFT-LCD com microcontroladores e interfaces gráficas em sistemas embarcados

Abstract

The increase in adoption in thin-film transistor liquid crystal displays (TFT-LCD) in embedded systems allowed more complex and interactive graphical applications to exist, but it has also brought several challenges concerning hardware and software resources. Several graphics libraries have appeared in the market to facilitate the creation of such complex graphic applications, transforming into an area that is continually growing. The first graphic libraries were commercial high-cost solutions. However, free solutions have emerged in the last few years. The need to create a proprietary graphics library despite of such free and commercial libraries can also be evaluated. This work proposes exploring such approach, by firstly presenting the architecture utilized to interface TFT-LCD with microcontrollers, by revising the state of art in relation with the current usage of these displays and making comparisons with simpler architectures. Thus, a basic driver and library for embedded systems can be developed to compare this implementation with some of the currently available solutions, in terms of performance, usage of computational resources and ease of use.