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I try to drive ST7735 OLED display with nucleo board. I worked with a ready-made example I found on the internet, but I could not print anything to the screen. When I compile my code, I don't get any errors and my screen is getting power. Is there a point I missed in the SPI settings?

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Some friends suggested adding SPI DMA TX, I tried but the result did not change. Do I need to enter an extra parameter in the DMA settings?

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    \$\begingroup\$ Honestly, if you're having problems driving your display without DMA, why add extra complexity? First you make it work without DMA, then you add DMA on top of it. DMA is a complex peripheral. Take a step back. Get the datasheet of the display's driver IC, check what and how example code initializes. \$\endgroup\$
    – Ilya
    Commented Jun 13, 2022 at 10:03
  • \$\begingroup\$ you're right, I already tried it without using dma, it didn't work, someone solved the problem by adding dma as a solution, so I added dma. thank you for your advice. \$\endgroup\$
    – mco
    Commented Jun 13, 2022 at 11:20

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