Samsung S6B0108 (Winstar WG12864F)

Controller: Samsung S6B0108.

Panel: Winstar WG12864F and similar panels.

Type: LCD with blue backlight/white dots, monochrome (1 bit/pixel), vertical pixel packing.

Locking: Supported, but the display image is not visible when the display is locked. This causes a noticeable "glitch" on the display when the lock/unlock is performed.

Test hardware: TEV-LB0 test board. This board is a part of the EM1000TEV development system.

I/O Mapping for WG12864F

This panel requires six I/O lines and an 8-bit data bus. The control lines are RST, EN, CS1, CS2, D/I, and R/W. Each control line can be connected to any I/O pin of your device, and each such I/O pin must be configured as an output (if your device requires explicit I/O line buffer configuration). The data bus can be connected to any 8-bit port. DO NOT configure this port for output.

The value of the lcd.iomapping property must be set correctly for the display to work (see Preparing the Display for Operation). For this particular display, the mapping string consists of seven comma-separated decimal values:

Number of the I/O line connected to RST.
Number of the I/O line connected to EN.
Number of the I/O line connected to CS1.
Number of the I/O line connected to CS2.
Number of the I/O line connected to D/I.
Number of the I/O line connected to R/W.
Number of the I/O port connected to DATA7-0.

I/O line numbers are from the pl_io_num enum. The port number is from the pl_io_port_num enum. The line and port numbers are platform-specific. See the list of pl_io_num and pl_io_port_num constants in the platform specifications.

For the TEV-LB0, the lcd.iomapping property should be set to "44,46,40,41,43,42,4."

Code Example — TEV-LB0

This code will properly set up and enable this controller/panel (we assume that the testing is done using the TEV-LB0):

Tibbo BASIC

							lcd.iomapping="44,46,40,41,43,42,4" 'RST,EN,CS1,CS2,D/I,R/W,DATA7-0
							   
							'configure control lines as outputs
							io.num=PL_IO_NUM_46 'EN
							io.enabled=YES
							io.num=PL_IO_NUM_44 'RST
							io.enabled=YES
							io.num=PL_IO_NUM_40 'CS1
							io.enabled=YES
							io.num=PL_IO_NUM_41 'CS2
							io.enabled=YES
							io.num=PL_IO_NUM_42 'R/W
							io.enabled=YES
							io.num=PL_IO_NUM_43 'D/I
							io.enabled=YES
							 
							'set resolution
							lcd.width=128
							lcd.height=64
							 
							'optionally set lcd.rotated here
							 
							lcd.enabled=YES 'done!
							 
							'turn on the backlight (strictly speaking, this is not related to the LCD control, but we still show it here)
							io.num=PL_IO_NUM_47
							io.enabled=YES
							io.state=HIGH 
							 
							set_lcd_contrast(11) 'this is for external contrast control circuit
						

Contrast Control

This is not a part of the panel itself, but we are still providing the code that will work on the TEV-LB0:

Tibbo BASIC

							Sub set_lcd_contrast(level As Byte)
							   'enable port, output data
							   io.portnum=PL_IO_PORT_NUM_4
							   io.portenabled=255
							   io.portstate=level
							   
							   'generate strobe for the data register (on the LCD PCB)
							   io.num=PL_IO_NUM_48
							   io.enabled=YES
							   io.state=HIGH
							   io.state=LOW
							   
							   'disable port
							   io.portenabled=0
							End Sub
						

You can design your own contrast control circuit, of course.