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STM32 SPI reading data is inaccurate, only the first time is correct, and the latter is not correct

2022-07-22 08:26:00 【Crazy Alex】

As the title ：SPI The read data is inaccurate , Only for the first time , Neither side is right behind

Later it was found that STM32 CubeMX I'm in trouble ,

I chose SPI1 NSS function , You can't choose this in the future , Put... Directly NSS The pin is set to push-pull output , In this way, the program is easy to control .

Because I'm here CubeMX Initialize the chip selection pin to SPI_NSS It's in , Later, when I read and write in the code, raising and lowering it will not work , therefore SPI Only valid when reading data for the first time , Other times are invalid

Keep in mind ,SPI Never choose CubeMX The middle one SPI_NSS 了

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本文为[Crazy Alex]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/203/202207211651079567.html

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