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VC5509A的usb CSL库使用问题

在使用CSL库配置5509时,和端点初始化有关的函数只有一个USB_initEndptObj,里面没有牵扯到对DMA的配置,在配置DMA是否使用RLD模式,传输SIZE等详细参数时,是不是需要直接对相关寄存器进行配置?谢谢