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如何修改EDMA的DBS(default burst size)



您好!

再用C6678的评估板开发PCI-E程序过程中,其outbound transfer过程,是通过EDMA将数据从存储区搬运到 PCIE data space(即0X6000 0000~0X6FFF FFFF)。

手册中说,EDMA的DBS可设置成128Bytes或64Bytes,当设为128Bytes时读写效率会比64Bytes高!

我找了EDMA手册半天也没有发现相关的寄存器,我想请问EDMA的DBS如何设置改成64Byte或128Bytes的?

 

祝好~~

感谢回帖!