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AM335x 的SD接口可以设置成ddr模式吗

请问:

         AM335X的SDIO接口在外接SD卡时,可以设置成ddr(dual data rate)模式吗? 如何在命令行(linux系统)上读出mmc设备接口的时钟模式呢?

谢谢!

  • 协议上支持吗?建议你查看一下AM335x的TRM手册中对于这部分的定义。印象中好像没有这么一个说法的。

    至于在Linux命令行查看时钟模式之类的,可以使用devmem2+物理地址的方式来访问相关的寄存器,从而进行判断。