通过DMA_SxPAR 或 DMA_SxM0AR 寄存器寻址,从外设数据寄存器或存储器单元中加载数据 通过DMA_SxPAR 或 DMA_SxM0AR 寄存器寻址,将加载的数据存储到外设数据寄存器或存储器单元 DMA_SxNDTR 计数器在数据存储结束后递减,该计数器中包含仍需执行的事务数 DMA进行数据传输的必要条件 剩余传输数据量大于0 DMA通道传输使...
int d_free_dmamem(d_handle_t device_handle, void * addr, size_t size) 說明 僅在PCI 型系統上支援匯出、記載的核心服務。 d_free_dmamem 核心服務會釋放 位址 參數所指向的記憶體區域。 這個記憶體區域必須配置給使用相同 device_handle的d_alloc_dmamem 核心服務,且 位址 必須是對應 d_alloc_dma...
ddi_dma_mem_free(9F)NAME | SYNOPSIS | PARAMETERS | INTERFACE LEVEL | DESCRIPTION | CONTEXT | SEE ALSO NAMEddi_dma_mem_free- free previously allocated memorySYNOPSIS#include <sys/ddi.h> #include <sys/sunddi.h> void ddi_dma_mem_free(ddi_acc_handle_t *handlep);PARAMETERS...
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ddi_dma_mem_free - free previously allocated memory Pointer to the data access handle previously allocated by a call to ddi_dma_mem_alloc (9F) .
DMA_Mem_to_Mem_1 DMA transfer between memories AURIX™ TC2xx Microcontroller Training V1.0.0 Please read the Important Notice and Warnings at the end of this document Scope of work The DMA is used to transfer ten words (32-bit) of data from one memory location to another without any ...
int d_free_dmamem(d_handle_tdevice_handle,void * addr,size_t size) 説明 エクスポートされ、文書化されたカーネル・サービスは、PCI ベースのシステムでのみサポートされます。自由 dmamemカーネル・サービスは、アドレスパラメーターが指すメモリーの領域を解放します。 このメモリ...
Hi, I am using DMA device in my Nios program for DE1 board. The code memtest.c is taken from the example given in Nios IDE. The part of the code is
Hi All , I have some issues in using the DMA test to verify the SDRAM, here are my configurations Platform : Altera DE2 Dev board SDRAM host
The dmabuf_peer_mem KMD registers itself with MOFED as a Peer-Memory client. As a dma-buf memory registry. The registry is a database of user supplied information of DMA-buf based memory allocations, including the virtuall address range and the file descriptor. The registry is accessed via...