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How to implements SPI by GPIO?

Embedded system programming,electronics DIY, ARM, Arduino, STM32, 8051, STM8,module, shield, development board.
BirdKing
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How to implements SPI by GPIO?

Post by BirdKing » Mon Jul 15, 2019 12:23 am

Hello, everyone.
Now, I want to implements SPI protocol by GPIO pins. But I'm new at this. The first thing I want know is that I should set the pin to IN or OUT for MOSI. And the same question to MISO, CLK and CSS...

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