Spi lcd 1.3 protocol - Revision history

Cartridge1987 at 14:34, 30 November 2015

2015-11-30T14:34:29Z

2015-11-30T14:30:11Z

write ports

2013-05-16T12:48:44Z

2013-05-16T12:41:07Z

define custom character

2013-03-27T06:41:07Z

write ports

2013-01-08T08:08:27Z

examples

2012-12-24T10:22:43Z

set cursor position

2012-12-24T10:22:25Z

examples

2012-12-24T10:20:54Z

examples

2012-12-24T10:20:36Z

examples

@@ Line 9: / Line 9: @@
-= write ports =
+= Write ports =
 Some ports just set a single value. So writing more than one byte to such a port is redundant. Other ports are logically a stream of bytes. So writing more than one byte is encouraged.
@@ Line 46: / Line 46: @@
 |}
-= read ports =
+= Read ports =
 The spi_lcd board supports two read ports:
@@ Line 56: / Line 56: @@
 | 0x02 || read eeprom (serial number).
 |}
-= examples =
+= Examples =
-== read identification ==
+== Read identification ==
 read the identification string of the board. ('spi_lcd 1.3').
@@ Line 100: / Line 100: @@
 |}
-== set cursor position ==
+== Set cursor position ==
 move to line 1, character 5:
 {| border=1
@@ Line 112: / Line 112: @@
 |}
-== define custom character ==
+== Define custom character ==
 A usage of the 0x01 port is to define custom characters. Here in a less verbose format:
@@ Line 138: / Line 138: @@
 01 0C  #blink off
-== scrolling the display ==
+== Scrolling the display ==
 Send

@@ Line 39: / Line 39: @@
 | 0x14 || reinit LCD.
 |-
-| 0xf0 || change address.
+| 0xf0 || Change address. Requires a write to 0xf1 and 0xf2 first.
+|-
+| 0xf1 || Write 0x55 here to start unlocking the change address register.
+|-
+| 0xf2 || Write 0xaa here to unlock the change address register.
 |}

@@ Line 123: / Line 123: @@
 Getting back to display mode (DDRAM) and moving to home position (address 0) can also be done by sending: "82 01 80"
+== Showing a cursor/blinking cursor ==
+Show cursor position:
+01 0E  # cursor on
+01 0C  # cursor off
+Blinking (current position):
+01 0D  #blink on
+01 0C  #blink off
 == scrolling the display ==

@@ Line 116: / Line 116: @@
 00 41 42 0                   # print characters A B and our newly defined character.
-Use 0x48 instead of 0x40 to define character number "1".
+Use 0x48 instead of 0x40 to define character number "1" (Up to 8 characters can be defined in CGRAM).
 the character data "01 02 04 08 10 10 10" is just an example. 11 11 11 1f 11 11 11 is the uppercase "H" that I have on my display right now.
 the last two lines are just a example of how to get back to "display" mode. It works for me I don't have the inclination to find other ways.
+Getting back to display mode (DDRAM) and moving to home position (address 0) can also be done by sending: "82 01 80"
 == scrolling the display ==

@@ Line 20: / Line 20: @@
 |-
 | 0x01 || write data as command to LCD.
+|-
+| 0x08 || Set startup message line 1. After setting the startup message please wait 100ms before sending the next line.
+|-
+| 0x09 || Set startup message line 2.
+|-
+| 0x0a || Set startup message line 3.
+|-
+| 0x0b || Set startup message line 4.
 |-
 | 0x10 || any data clears the screen.