How can I display anything on OLED display using SPI?

patrykokruta — Sun, 22 Dec 2019 22:31:33 GMT

Hi, I am trying to display some random pixels on this display using SPI. As a master MCU I use KL46z. My whole code was written from scratch based on driver's datasheet. The problem is that i can't display anything and I don't know what I am doing wrong. I am looking for somebody who might have worked with such display or in general used SPI to work with different display and could see if something's missing or whether I have some mistake in logic. I checked SPI signals with logic analyzer and they look fine. That's a repository with a code. Thanks for any help.

Re: How can I display anything on OLED display using SPI?

kerryzhou — Tue, 24 Dec 2019 02:58:17 GMT

Hi Patryk Okruta ,

About the OLED display, normally, you need to find some driver code for it, I search it from google, and find someone share the related code driver:

https://github.com/lorneb/Adafruit_SH1106

So you can check it, whether your related SPI sendout command it correct.

About the SPI chip driver, you need to check it with your OLED driver chip, the clock frequency, the Clock Phase and Clock Polarity is the same as your OLED driver chip.The SPI_CS pin, I suggest you use the GPIO to control it, just make sure the CS wave is corrent.

About the OLED chip app driver, I suggest you refer to the examples in the github, it may useful to you. You also can check it with your OLED chip company, whether they already provide some C code about it.

Wish it helps you!

Have a great day,
Kerry

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How can I display anything on OLED display using SPI?

Re: How can I display anything on OLED display using SPI?