Hammer LCD 8bit Color STN

This is a "HowTo" for the Panasonic EDMGRB8KJF (Datasheet) available from EarthLCD to be used with the Hammer development module from TinCanTools

Matching Pinouts

Pin Number	Hammer	Note	LCD	Pin Number
16	VM	Display On/Off	DISPON	16
17	VFRAME	LCD Vertical sync	FRM	20
18	VLINE	LCD Horizontal sync	LOAD	14
19	VCLK	LCD pixel clock	CP	12
21	LCD_VD0	LCD data bit 0	Data0	9
22	LCD_VD1	LCD data bit 1	Data1	8
23	LCD_VD2	LCD data bit 2	Data2	7
24	LCD_VD3	LCD data bit 3	Data3	6
25	LCD_VD4	LCD data bit 4	Data4	4
26	LCD_VD5	LCD data bit 5	Data5	3
27	LCD_VD6	LCD data bit 6	Data6	2
28	LCD_VD7	LCD data bit 7	Data7	1
		+3.3V	VDD	10
		+3.3V	VDD	11
		+3.3V	VDD	13
		Ground	VSS	5
		Ground	VSS	15
		Ground	VSS	17
		Ground	VSS	19
		Contrast +1.95V (+-0.8V)	VCON	18

NOTE: VCON should be variable control to adjust contrast and the VDD should have separate power control, i.e. via a gpio

NOTE: This display also requires a backlight inverter (see datasheet for requirements)

Linux Kernel 2.6.29.6 Build Notes

In order to get this screen to work framebuffer support has to be built into your kernel.

 cd hammer/source/linux-2.6.29.6
 export ARCH=arm
 export CROSS_COMPILE=arm-linux-uclibc-
 make menuconfig 

 Device Drivers ->  Graphics Support -> Support for frame buffer devices
 Inside this sub menu add:
 [*] Enable Video Mode Handling Helpers
 <*> S3C2410 LCD framebuffer support

 Under Device Drivers -> Graphics Support -> Console display driver support ADD
 Framebuffer Console Support

NOTE: It is also a good idea to go ahead and add the boot logo.

The next step is to add the display settings to your mach-tct_hammer.c file in ./arch/arm/s3c2410 If you have questions about this file please see the linux documentation ( I will try to make a patch for this at a later date)