LCD controllers (like the ILI9341, ST7789, or SSD1306) are "dumb" until they receive a specific sequence of commands. This sequence is the .
01, 00, // Software reset, no data 3A, 55, // Pixel format RGB565 36, 48 // MADCTL = 0x48
Ensure "Include Image Header" is unchecked if your custom graphics library only expects raw pixel values. The header adds extra bytes at the beginning of the array, which will shift all your pixels forward and ruin the graphic layout. To help troubleshoot further, let me know:
First, we need a way to differentiate one device from another. On an STM32, this is straightforward:
The registration process usually links the software functionality to a specific machine. image2lcd register code work
: Re-export the image from Image2LCD with "Low byte first" if your DMA supports little-endian transfers. This eliminates software byte reordering entirely.
A typical register code snippet looks like this (for an ILI9341):
| Symptom in Display | Root Cause | Register Fix | |-------------------|------------|---------------| | Colors inverted (red ↔ blue) | Image2LCD exported RGB, but LCD expects BGR | Set BGR bit in register 0x36 | | Image mirrored horizontally | Scan mode mismatch | Toggle MX bit in 0x36 | | Image rotated 90° | Column/row swap not set | Toggle MV bit in 0x36 | | Garbage blocks, colorful noise | Pixel format mismatch (RGB565 vs RGB666) | Check register 0x3A matches Image2LCD format | | Image shifted diagonally | Address window registers ( 0x2A , 0x2B ) wrongly sized | Verify start/end columns/pages match image dimensions |
：RGB/BGR通道顺序不匹配。即Image2LCD输出的是RGB顺序，但LCD寄存器配置为BGR，或者字节序不匹配。 LCD controllers (like the ILI9341, ST7789, or SSD1306)
Image2Lcd is shareware. The trial version limits the size of the image you can convert (typically restricting output to a maximum of 100x100 pixels) and may inject watermarks or omit data lines. Entering a Registration Code
色彩深度的选择直接影响Flash占用、SRAM需求、DMA负载等一整套连锁反应。举例来说，一块2.8寸240x320的TFT屏：
Image2LCD can swap byte order before outputting, or set register 0x36 bit BGR=1.
If you have trouble with the software on modern systems (e.g., macOS or newer Windows versions), many developers use free browser-based alternatives: The header adds extra bytes at the beginning
完成上述寄存器配置后，再通过Image2LCD生成RGB565格式的图像数据，使用SPI接口逐字节发送到LCD即可正确显示。
What are you using (e.g., ILI9341, ST7789, SSD1306)?
Developers unable to activate Image2Lcd due to registration key mismatches can utilize several free, open-source alternatives that generate identical C array code outputs without licensing restrictions: