专家您好：
本人使用的TMS320C6678自制板，外接5片MT41K256M16 DDR3芯片（包括ECC DDR）。已经按照自己板子的参数修改了DDR3 PHY Calc.xlsx和DDR3 Register Calc.xlsx，并且在GEL文件中配置了相应的寄存器。在对DDR3的测试中 ，TEST_BY_DSP_CORE可以成功，但是TEST_BY_DMA永远失败。
控制台部分输出如下：
DDR3 memory test with EDMA at 1705725 cycle
Memory Test with DMA fails at 0x80000000,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000008,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000010,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000080, Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000088,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000090,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000100,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000108,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000110,Write 0x0000000000000000,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000180,Write 0x0000000000000000,Readback 0x0400000000000000
!!!Failed Memory Fill Test at 10 Units with pattern 0x0000000000000000 with EDMA CC0 TC0
Memory Test with DMA fails at 0x80000000,Write 0xffffffffffffffff,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000008,Write 0xffffffffffffffff,Readback 0x0400000000000000
Memory Test with DMA fails at 0x80000010,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000018,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000020,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000028,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000030,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000038,Write 0xffffffffffffffff Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000040,Write 0xffffffffffffffff,Readback 0x0000000000000000
Memory Test with DMA fails at 0x80000048,Write 0xffffffffffffffff,Readback 0x0000000000000000
!!!Failed Memory Fill Test at 10 Units with pattern Oxffffffffffffffff with EDMA CCO TC1
求助各位专家，想知道是哪里的问题
