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关于使用EDMA的问题



在网上下的edma例子,如果不加DAT_copy(srcbuf,dstbuf,512*4);的话,能够在ccs下正常编译和debug,但是加了DAT_copy(srcbuf,dstbuf,512*4);之后,弹出错误“

Description Resource Path Location Type
unresolved symbol DAT_copy, first referenced in ./main.obj test_deyisupport C/C++ Problem

求大神解答