Practical Implementation of Driver and Hardware Acceleration Techniques for ST7789 Display

# 1. Introduction to ST7789 Display

## 1.1 Basic Features of ST7789 Display
The ST7789 display is a widely used color LCD display, characterized by high resolution, wide color gamut, and fast refresh rates. It is commonly utilized in embedded systems, smart wearable devices, and portable electronics.

## 1.2 Application Areas of ST7789 Display
The ST7789 display is extensively used in smart home technology, medical equipment, industrial control, and other fields. Its exceptional display quality and stability have been widely acclaimed.

## 1.3 Operating Principle of ST7789 Display
The ST7789 display renders images by controlling the brightness and color of pixels. Its operating principle is based on the change in the arrangement of liquid crystal molecules under the influence of an electric field. The driver circuitry controls the display state of each pixel based on received signals, thereby presenting a rich array of image content.

# 2. Overview of Display Drive Technology

Display drive technology refers to the software and hardware techniques that control the operation of the display. In this chapter, we will discuss the basic principles of display drive, common display drive solutions, and the drive requirements and challenges for the ST7789 display.

### 2.1 Basic Principles of Display Drive

The fundamental principle of display drive is to control the update of display content and presentation of display effects by sending specific signals to the display. This includes the control and management of parameters such as pixel color values, display areas, and refresh rates to dynamically present images and text content on the display.

### 2.2 Common Display Drive Solutions

Common display drive solutions include software drive and hardware-accelerated drive. Software drive is controlled by the CPU for updating and rendering display content, while hardware-accelerated drive is assisted by dedicated hardware modules, enhancing performance and efficiency.

### 2.3 ST7789 Display Drive Requirements and Challenges

As a high-performance display device, the ST7789 display demands much from drive technology. Its high resolution, high refresh rate, and color display requirements present challenges for both drive software and hardware. It necessitates a comprehensive approach to achieving smoother and clearer display effects.

# 3. Introduction to Hardware Acceleration Technology

Hardware acceleration technology plays a significant role in display drive, substantially enhancing performance in graphical rendering and animation effects. This chapter will introduce the basic concepts of hardware acceleration technology, its advantages, and methods for implementing hardware acceleration in embedded systems.

#### 3.1 Concept and Advantages of Hardware Acceleration

Hardware acceleration utilizes dedicated hardware to perform specific computational tasks, ***pared to software implementations, hardware acceleration is typically faster and more efficient.

Advantages include:
- Improved performance: Hardware acceleration completes computations on dedicated hardware, avoiding frequent CPU calls, and increasing data processing speed.
- Energy conservation: Hardware acceleration reduces CPU power consumption, extends battery life, and decreases device heat output.
- Enhanced stability: Hardware acceleration is executed on specialized hardware, reducing dependence on software, and increasing stability and reliability.

#### 3.2 Comparison of Various Hardware Acceleration Technologies

Common hardware acceleration technologies include GPU acceleration, DSP acceleration, and hardware decoders. Each has its advantages and is suitable for different scenarios:
- GPU Acceleration: Suitab