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https://bravikov.wordpress.com/2011/09/05/%d0%bd%d0%b0%d1%81%d1%82%d1%80%d0%be%d0%b9%d0%ba%d0%b0-%d0%b2%d1%8b%d0%b2%d0%be%d0%b4%d0%be%d0%b2-stm32f10x-%d0%b4%d0%bb%d1%8f-%d1%80%d0%b0%d0%b1%d0%be%d1%82%d1%8b-%d1%81-%d0%bf%d0%b5%d1%80%d0%b5/
Настройка выводов STM32F10x для работы с переферийным SPI