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| + | ==== 03. Making a simple character device ==== | ||
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| + | [[https://www.google.com/search?q=linux+kernel+character+device+example|Check Google]] for [[https://olegkutkov.me/2018/03/14/simple-linux-character-device-driver/|some inspiration]] on Linux kernel [[http://derekmolloy.ie/writing-a-linux-kernel-module-part-2-a-character-device/|sample character device]] modules. | ||
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| + | Simply take the code, try to build it / fix it (if required, since newer kernel versions may break old APIs). | ||
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| + | Also make sure to put some ''printk()'' calls for debugging (if they're not already in the sample code). | ||
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| + | After a successful compilation, test it on your board using ''insmod''! Check ''dmesg'' for the (hopefully) successful messages. | ||
