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tests: pkg_u8g2: improve readme.

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Bas Stottelaar 2016-06-22 22:51:32 +02:00
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tests/pkg_u8g2/README.md
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@ -6,18 +6,20 @@ This is a test application for the U8g2 package. This package is a graphical dis
## Usage
This test application will initialize the U8g2 to output on one of the following:
* output to stdout virtual screen.
* output to terminal virtual screen.
* output to SDL virtual screen.
* output to I2C graphics screen.
* output to SPI graphics screen.
### Output to stdout
Note: you may have to run `make clean` between different output modes.
### Output to terminal
To output to this virtual screen, supply `TEST_U8G2_OUTPUT=1` to the `make` command.
### Output to SDL
To output to this virtual screen, supply `TEST_U8G2_OUTPUT=2` to the `make` command.
This is a native-only option.
This is a native-only option and requires SDL (32-bits) to be installed.
### Output to SPI
To output to screen, supply `TEST_U8G2_OUTPUT=3` to the `make` command.