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关于SPI的硬件连接问题,求指点

Other Parts Discussed in Thread: TMS320F2802

TMS320F2802的SPI片选引脚SPISTE是高电平使能,而F28069的SPI片选则是SPISTE低电平有效,两者直接连起来通信会不会有问题?因为我一直这样试不成功?求指点。。。在线等

 

  • sam

    正如下图所示SPISTE是slave的使能信号,如果你的2806x是master,可以在2806x出来的信号加一个非门。另外,你测试一下,直接把2802的SPISTE置高电平,不与28069相连,看通信正常不?

     

    Eric