PCIE DMA寄存器出錯

想用FPGA跟PC經過DMA通訊: 

Qsys 配置如圖:  

 

驅動寫 DMA 代碼: 

     

KdPrint(("  中斷已經註冊       \n"));

 

// 1. 設置DMA參數

WRITE_REGISTER_ULONG((PULONG)(g_MemRegister + 0x4000 + 0x04), (ULONG)0xffffffff); // DMA 讀地址

WRITE_REGISTER_ULONG((PULONG)(g_MemRegister + 0x4000 + 0x08), (ULONG)0xffffffff); // DMA 寫地址

//WRITE_REGISTER_ULONG((PULONG)(g_MemRegister + 0x4000 + 0x08), (ULONG)m_pycialAddressForImage.LowPart);

WRITE_REGISTER_ULONG((PULONG)(g_MemRegister + 0x4000 + 0x0C), (ULONG)0x0);  // DMA 長度

DumpBuffer(g_MemRegister + 0x4000 , 0x40);   // 打印日誌

 

 

 

DumpBuffer 打印出來的,內容:

 

 

跟我想要的徹底不同,    這是什麼緣由啊?