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pkg: u8g2: smaller patches + comments.
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@ -52,8 +52,8 @@ u8g2_SetDevice(&u8g2, SPI_0);
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## Virtual displays
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For targets without an I2C or SPI, virtual displays are available. These displays are part of U8g2, but are not compiled by default.
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* By adding `USEMODULE += u8g2_utf8`, a terminal display is used as virtual display.
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* By adding `USEMODULE += u8g2_sdl`, a SDL virtual display will be used. This is only available on native targets that have SDL installed.
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* By adding `USEMODULE += u8g2_utf8`, a terminal display is used as virtual display, using UTF8 block characters that are printed to stdout.
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* By adding `USEMODULE += u8g2_sdl`, a SDL virtual display will be used. This is only available on native targets that have SDL installed. It uses `sdl-config` to find the headers and libraries. Note that RIOT-OS builds 32-bit binaries and requires 32-bit SDL libraries.
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### Example
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```
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