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SPI通讯的软件模拟时序和硬件时序有什么区别

2025-04-07 12:20:14

推荐回答（1个）

回答1：

时序没有区别。
硬件SPI效率高些，写程序的时候只要把要发的数据写到寄存器里，硬件就自动给你发了。软件需要你去实现时钟拉高拉低，数据串行输出等等。
硬件的SPI必须要处理器支持才可以用。软件SPI就不需要特定的要求了，一般的IO口就可用。

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