TFT_S1D13781
Introduction
This is a port of the driver from the Epson S1D13781 display controller using the HardwareSPI library.
Evaluation boards are inexpensive and is a useful way to evaluate display modules with TFT interfaces.
The Newhaven NHD-5.0-800480TF-ATXL#-CTP was used during development.
Video line: https://youtu.be/UgLX9gEdz6A
Notes
This library was developed as a stepping stone to the Bridgetek FT81x series EVE Embedded Video Engines.
These are more advanced and work by buffering graphics command primitives which are then executed in real time to construct each displayed frame.
These devices are used in the Gameduino. The author has an open source library.
This library is not fully asynchronous, but has couple of key improvements over the original source:
- Cached register values
These do not need to be read for every operation. Considerable increase in performance.
- Asynchronous writes
The HardwareSPI library can execute requests asynchronously, and this is used to provide some improvement in performance where no response is required from the display controller.
The next stage of development would be to build a generic graphics library to support multiple display controllers. Like the EVE controllers, it would incorporate a graphics instruction pipeline so that the application can buffer drawing requests in a fully asynchronous manner, eliminating any bottlenecks or wait states in the application.
References
Used by
Screen TFT_S1D13781 Sample
SoC support
esp32
esp32c2
esp32c3
esp32s2
esp32s3
esp8266
host
rp2040