emWin can not display png format image

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by jhp on Sat Apr 06 22:00:38 MST 2013

I have a ploblem: the png image cann't display in emwin

compile: keil for arm v4.60
MCU : LPC1850 (evaluate board)
emWin version : 5.12 lib (no source code)
pnglib:download from <a class="externalURL" href="http://www.segger.com/link/emwin_png.zip"><span style="color: #0000ff;">www.segger.com/link/emwin_png.zip</span></a>
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(displayed for emwin 4.18/5.00/5.18 ) with the emwin v5.12 have many errors when compiling.

subsequently I download the emwinv5.18 lib from LPCWARE 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 !