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大佬们,你们好,由于这个芯片的SPI1只有一个硬件片选信号,我们想通过软件片选的方式驱动多个spi设备,但因为网上资料较少,无从下手,假设增加PB12和PD10为两个SPI设备的软件片选引脚,请问需要增改哪些文件
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