The first function is perform_dma, which, not surprisingly, performs DMA commands.
第一个函数是 perform_dma，毫无疑问，该函数执行DMA命令。
A break above the 21-dma (weekly support) will turn the short-term bias positive.
如突破21日移动均线(本周支撑位)，短期偏见或将转向积极。
Once the DMA is completed, your function is done.
一旦DMA完成，函数也即完成。
Queue a DMA PUT to transfer the buffer back to main memory.
对DMA PUT 进行排队，从而将缓冲区传输回主内存。
The "tag" is a number which can be assigned to one or many DMA commands.
“标签”是一个数值，可分配给一个或多个dma命令。
However, there are some legacy systems that do not support DMA.
但是也有很多以前的体系不支持直接存储器存取。
Others have DMA engines which need to know the real address on the bus.
另外一些带有dma引擎的设备需要知道总线上的真实地址。
The DMA command can also have certain levels of synchronization applied to it.
dma命令也可以应用一些特定级别的同步。
The DMA command can also have certain levels of synchronization applied to it.
dma命令也可以应用一些特定级别的同步。
应用推荐