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by weisert
Sun Dec 12, 2021 7:47 am
Forum: ESP-IDF
Topic: U8g2 spi st7920 not working in esp idf but ok with Arduino
Replies: 2
Views: 4224

Re: U8g2 spi st7920 not working in esp idf but ok with Arduino

I just ran into this same issue about a year later, and discovered (with help from this post) that the default direction of the SPI CS line is active *low*. When using the u8g2_esp32_hal, the following change is required to switch the direction of the SPI line: [Codebox] spi_device_interface_config_...