1. Article purpose[edit source]
Low resolution display panels can be connected to STM32 boards using low speed interfaces like I2C, SPI or FMC. Some famous of this category of display panels are:
- the SSD1306 monochrome OLED panels,
- the GC9A01 round 16-bit color panels,
- the 1602 monochrome 2 text lines panels.
The purpose of this article is to:
- briefly describe the main characteristics of the low resolution panels,
- present some hardware attention points to consider before writing a panel software driver,
- introduce the Linux® kernel frameworks used to control these display panels,
- describe how to write, test and debug your own display panel driver,
- demonstrate simple use cases based on these display panels,
- suggest alternatives for driving these display panels.
{{Info | Before you continue reading this article, you might be interested in the following articles: DRM KMS overview, How to write a display panel or bridge driver, I2C overview, [[SPI overview].}}
2. Prerequisites and preparations[edit source]
What is required to complete the following steps or to achieve the goal?
3. Hardware considerations[edit source]
4. Linux Kernel[edit source]
4.1. Architecture[edit source]
![DRM/KMS framework overview with "TinyDRM" Alternate text](/stm32mpu/nsfr_img_auth.php/thumb/1/1e/DRMKMS_Overview_with_tinydrm.png/800px-DRMKMS_Overview_with_tinydrm.png)
4.2. Software frameworks and drivers[edit source]
4.3. Tests and Debug[edit source]
4.4. Performance considerations[edit source]
5. Use case examples[edit source]
5.1. System monitoring[edit source]
5.2. Video playbacks[edit source]
5.3. Graphics with GPU[edit source]
6. Backlight[edit source]
7. U-boot[edit source]
8. Procedure 1[edit source]
Explain the outcome of this procedure. In the table below, list each high-level step which will be documented in detail below the table.
Step | What to do | Notes |
---|---|---|
1 | ||
2 | ||
3 |
8.1. Step-by-step instructions[edit source]
- Do step 1
- Do step 2
- Do substep 2.1
- Do step 3
9. Procedure 2[edit source]
Explain the outcome of this procedure. In the table below, list each high-level step which will be documented in detail below the table.
Step | What to do | Notes |
---|---|---|
1 | ||
2 | ||
3 |
9.1. Step-by-step instructions[edit source]
- Do step 1
- Do step 2
- Do substep 2.1
- Do step 3
10. Related pages[edit source]
- Link to related page 1
- Link to related page 2
11. References[edit source]