Hi All,
I’m currently busy with a 20x4 I2C OLED Display with Volumio 1.55 on a RPI B
I’ve solderd the display to the GPIO Pins (VCC5+, GND, SDA, SCL)
Only I can’t get any visuals…
Before I Used a 16x2 LCD HD44780, which worked perfectly.
I’ve changed LCDd.conf to DEV/I2C-1, 0x20, Installed i2ctools.
This is the display i’m using
http://www.ebay.com/itm/161575128497?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D161575128497%26_rdc%3D1
Does anybody has any suggestions getting this display operational?
Grt Arco
[code]## Hitachi HD44780 driver ##
[hd44780]
Select what type of connection. See documentation for types.
ConnectionType=i2c
Port where the LPT is. Usual value are: 0x278, 0x378 and 0x3BC
Port=0x27
Device of the serial interface [default: /dev/lcd]
Device=/dev/i2c-1
Bitrate of the serial port (0 for interface default)
Speed=0
If you have a keypad connected.
You may also need to configure the keypad layout further on in this file.
Keypad=no
Set the initial contrast (bwctusb and lcd2usb) [default: 500; legal: 0 - 1000]
Contrast=0
Set brightness of the backlight (lcd2usb only) [default: 0; legal: 0 - 1000]
#Brightness=1000
#OffBrightness=0
If you have a switchable backlight.
Backlight=no
If you have the additional output port (“bargraph”) and you want to
be able to control it with the lcdproc OUTPUT command
OutputPort=no
Specifies if the last line is pixel addressable (yes) or it controls an
underline effect (no). [default: yes; legal: yes, no]
#Lastline=yes
Specifies the size of the LCD.
In case of multiple combined displays, this should be the total size.
Size=20x4
For multiple combined displays: how many lines does each display have.
Vspan=2,2 means both displays have 2 lines.
#vspan=2,2
If you have an HD66712, a KS0073 or another ‘almost HD44780-compatible’,
set this flag to get into extended mode (4-line linear).
#ExtendedMode=yes
In extended mode, on some controllers like the ST7036 (in 3 line mode)
the next line in DDRAM won’t start 0x20 higher. [default: 0x20]
#LineAddress=0x10
Character map to to map ISO-8859-1 to the LCD’s character set
[default: hd44780_default; legal: hd44780_default, hd44780_euro, ea_ks0073,
sed1278f_0b, hd44780_koi8_r, hd44780_cp1251, hd44780_8859_5, upd16314 ]
(hd44780_koi8_r, hd44780_cp1251, hd44780_8859_5 and upd16314 are possible if
compiled with additional charmaps)
CharMap=hd44780_default
If your display is slow and cannot keep up with the flow of data from
LCDd, garbage can appear on the LCDd. Set this delay factor to 2 or 4
to increase the delays. Default: 1.
#DelayMult=2
Some displays (e.g. vdr-wakeup) need a message from the driver to that it
is still alive. When set to a value bigger then null the character in the
upper left corner is updated every seconds. Default: 0.
#KeepAliveDisplay=0
If you experience occasional garbage on your display you can use this
option as workaround. If set to a value bigger than null it forces a
full screen refresh seconds. Default: 0.
#RefreshDisplay=5
You can reduce the inserted delays by setting this to false.
On fast PCs it is possible your LCD does not respond correctly.
Default: true.
DelayBus=false
If you have a keypad you can assign keystrings to the keys.
See documentation for used terms and how to wire it.
For example to give directly connected key 4 the string “Enter”, use:
KeyDirect_4=Enter
For matrix keys use the X and Y coordinates of the key:
KeyMatrix_1_3=Enter
KeyMatrix_4_1=Enter
KeyMatrix_4_2=Up
KeyMatrix_4_3=Down
KeyMatrix_4_4=Escape
[/code]