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AM335x核心板的SPI驱动不能产生时钟

Other Parts Discussed in Thread: AM3352

使用的核心板为AM3352,系统为WINCE系统,无论是未修改还是修改后的BSP,编译出的SPI驱动程序,不能够产生时钟,也接收不到数据,请帮忙分析一下这是什么原因导致的,需要修改那些寄存器设置?谢谢!