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AM3359的例程 ethercat_slave_full application 中的master spi 通信怎么实现的

Other Parts Discussed in Thread: AM3359

用的AM3359 ice v2 板子,已经成功实现了EtherCAT_slave_full application,用的是ti的例程,我想在这个例程的基础上实现spi通信,am3359做主设备,我看到这个例程中关于spi 的东西太多了,有board_spi.c  board_mcspi.c  tiesc_spi_master.c  等等。看的头都大了,我应该搞明白哪个c文件?你们的 Processor SDK RTOS文档中介绍的也太简略了。还有这么多c文件,我怎么知道执行了哪个?求指点,我大方向都搞不明白了。