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初学者请教EDMA3的问题

你好,

我是用c6678开发板,想用EDMA从DDR3中取数到L2中,并且想按二维取数的方式一次性从DDR3中隔行取数并由EDMA传输。但目前我设置的EDMA只能从源地址按顺序读数传送,请问我需要设置什么寄存器之类的来改变EDMA的读数方式呢?