emWin display PNG file

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  • emWin display PNG file

    I have a ploblem: display png image file.

    compile: keil for arm v4.60

    MCU LPC1850

    emWin version : 5.12 lib (no source code)

    pnglib download from www.segger.com/link/emwin_png.zip

    but it cannt pass compiling. the error message:

    .\obj\lpc18xx.axf: Error: L6218E: Undefined symbol LCD_DrawBitmap (referred from gui_png.o).

    .\obj\lpc18xx.axf: Error: L6218E: Undefined symbol abort (referred from pngread.o).

    all pnglib package for emwin 4.18/5.00/5.18 have many errors as above when compiling.

    the emwinv5.18 lib from LPCWARE(NXP MCU) with the pnglib 5.18 still can not pass compiling.

    the specification about png format image is too simple, Could you tell me the method and steps.

    Thank you !

    The post was edited 4 times, last by jhp ().

  • Hello,

    The function LCD_DrawBitmap() is defined in the emWin core. It should therefor be also included in the library. Please ensure the PNG library is included correctly in your project. In case you are not able to resolve the problem, please contact Keil for further support on this matter.

    Best regards,