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Forum Index : Microcontroller and PC projects : uM2: OLED and Nokia drivers

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matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10066

Posted: 02:32am 15 Oct 2015

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In the third tutorial on CFunctions I developed a loadable display driver for the SPI SSD1306 OLED displays. With minor modification this also works on the NOKIA5110.

This allows these displays to be used with the in-built Micromite Basic drawing commands: BOX, TEXT, CIRCLE etc. As they are monochrome displays a colour of zero i.e. RGB(black) is used to turn a pixel off and any other colour will turn it on.

Basic programs to load the drivers for both types of display are attached:

2015-10-15_122028_NOKIA-OLEDloadable.zip

The drivers are loaded using MM.STARTUP and can be saved with LIBRARY SAVE.

Both drivers need the pins specifying for:

control/data (labelled DC)
reset (labelled RST)
and chip select (labelled CS or CE)

In addition you need to connect the SPI clock pin and the SPI data out pin from the Micromite.

In the case of the Nokia you also need to specify the contrast value: &HB8 works for my display and is set in the example code but you may find any value between &HB0 and &HBF useful.

In the case of the OLED display you need to specify if it is a 1.3" display (code=1, set in the example code) or a 0.96" display (code=0). These seem to have slightly different wiring but if you are missing pixels on either the right or left of the screen try the other code value.

The current version of the code works on the 28 or 44-pin Micromite not the MM+. I could produce a version for the MM+ if required - let me know.

Note that the code only works for the SPI version of the OLED display. Trying to drive I2C from inside a CFunction is currently not possible.

Hope this is useful to someone.

twofingers
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Joined: 02/06/2014
Location: Germany
Posts: 1526

Posted: 06:15am 15 Oct 2015

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Thanks a lot, Peter!
AFAIK should this very useful for many TBS users here!

Michael

causality ≠ correlation ≠ coincidence

kermess
Regular Member

Joined: 04/04/2013
Location: Spain
Posts: 45

Posted: 07:50am 23 Feb 2016

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Hi there,
I am interested in knowing if there is any library for KS0108 display in format "Loadable"
Thank you
David_PM

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