lpcware

LPC1788 8bpp LCD Interface connection

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by jay123 on Mon Jul 20 23:28:54 MST 2015
i'm using graphic LCD with 24 color lines (8xR+8xB+8xG). i want to connect lcd with LPC1788 in 8bpp 332 mode.

anybody know connnection diagram in 332 and 323 mode?

if i configured segger for 16bit 565 color conversion mode then it takes more time to update LCD then 8 bit LCD driver.
update time of 8bit is 80% faster than 16bit so i want to interface LCD in 8bit 332 (RGB mode) only.

Segger configuration:
16 bit configuration:
#define COLOR_CONVERSION   GUICC_565
#define DISPLAY_DRIVER     GUIDRV_LIN_16

8 bit configuration:
#define COLOR_CONVERSION   GUICC_332
#define DISPLAY_DRIVER     GUIDRV_LIN_8

Result:
Sr No | Segger config | LCD Config | Conclusion
1        | 16bpp            |  16 bpp       | display properly but update time is too slow
2        | 8bpp              |  16 bpp       | not display proper shown in attach image (8bpp) but update time is better
3        | 8bpp              |  8 bpp         | display blank only backlight turns ON

attach image :
A,b -> display two times
c --> display junk data

in 2nd case image is drawn twice and scale by 4 but it should display as shown in attach image(expected).

which pins are use for 8bit 332 RGB mode???
please share schematic of same

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