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EA DOGM204 nice 20x4 ultraslim display

 
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EDC

Bascom Expert



Joined: 26 Mar 2014
Posts: 700

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PostPosted: Mon Nov 04, 2019 4:55 pm    Post subject: EA DOGM204 nice 20x4 ultraslim display Reply with quote
Hello. I got such a display Very Happy
It is :
* extremely compact at 66 x 40 mm at the standard font size of 4.8 mm (4 x 10)
* ultra-flat at 2.0 mm without backlight or 5.8 mm including LED backlight
* 4-bit, 8-bit, SPI interface (2-/3-/4-wire) and I²C (2-wire)
* typical power consumption of only 250µA in full operation (LED white backlight as of 3mA)
* easy installation by simply soldering into the board
* A whole range of design variants can be supplied as of single units
* Changing background color

Unfortunatelly I dont have backlight yet so first Im using flashlight and then some Rainbowled`s Very Happy
Backlight will arrive soon I think.

I have modified "4_anypin.lib" with some needed initialisation, and then anyone can use Bascom`s dedicated functions like Lcd and Locate.

Remember to choose 20x4A because adressess for rows are &H00, &H20, &H40 and $H60

Library and datasheet attached.
Tested on the 3V3 circuit. Not tested with Xmega but oryginally "4_anypin.lib" support Xmega so it should work.



Code:
$regfile = "m1284def.dat"
$crystal = 16000000
$hwstack = 64
$swstack = 16
$framesize = 64
Config Submode = New

$lib "EADOGM204_4_anypin.lib"                               'four bits

Config Lcdpin = Pin , Rs = Porta.0 , E = Porta.1 , Db4 = Porta.4 , Db5 = Porta.5 , Db6 = Porta.6 , Db7 = Porta.7
Config Lcd = 20x4a                                          ' <<< A is important!

Lcdreset Alias Porta.2 : Set Lcdreset : Config Lcdreset = Output       'set HI

Macro Resetlcd
 Lcdreset = 0
 Waitms 10
 Lcdreset = 1
 Waitms 1
End Macro

Resetlcd : Initlcd : Cls

Locate 1 , 1 : Lcd "Hello World"
Locate 2 , 1 : Lcd " EADOGM204A"
Locate 3 , 1 : Lcd " BASCOM"
Locate 4 , 1 : Lcd "EDC"

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albertsm

Administrator



Joined: 09 Apr 2004
Posts: 5093
Location: Holland
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PostPosted: Tue Nov 05, 2019 9:32 pm    Post subject: Reply with quote
Hi EDC

Thanks for sharing. Indeed a nice LCD.
I see you use side lighting Smile

I used similar lcd. contrast is great.

thanks for taking the time to share!
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