Determined to solve the mystery, Alex decided to investigate further. He set up a logic analyzer to capture the communication between his microcontroller and the LCD display. As he ran his code, the analyzer displayed a stream of bits:
The following table decodes the critical parameters in Image2LCD and their direct link to the underlying register configuration of the LCD controller.
When debugging image display issues, being able to manually parse the register code can save hours of troubleshooting.
When "Include Image Header Data" is unchecked, the header bytes are omitted and the array starts with raw pixel data directly. image2lcd register code
When entered into the app, the local software verifies that the register code cryptographically matches the machine code of that specific PC. Legal and Safe Alternatives for Embedded Developers
const unsigned char gImage_bootlogo[1032] = /* 128*64/8 = 1024 bytes + 8 bytes init */ 0x00,0xAE, // Display OFF 0x00,0xD5,0x40,0x80, // Set clock divide ratio 0x00,0xA8,0x40,0x3F, // Set multiplex ratio 0x00,0xD3,0x40,0x00, // Set display offset 0x00,0x40,0x40,0x00, // Set start line 0x00,0x8D,0x40,0x14, // Charge pump ON 0x00,0xAF, // Display ON 0x40,0x00,0x80,0x3C, // Page 0, Column 0, pixel data... // (continued pixel data) ;
Let's break down each of these members to understand how they control the display. Determined to solve the mystery, Alex decided to
Unlock 24-bit and high-color conversion options.
Converts JPG, BMP, PNG, and GIF into C array ( .c), binary ( .bin), or WBMP formats.
const unsigned char gImage_oled[1024] = // 128×64÷8 = 1024 bytes 0x3C, 0x42, 0x81, 0x81, ... ; When debugging image display issues, being able to
This function extracts the width and height directly from the header, making the code portable across different image sizes.
Under in Image2LCD, select your color depth. For C array output, the generated code will look like: