Therefore, they cannot be accessed directly, but must be moved in through DMA.
因而,它们不能被直接访问,而必须通过 DMA 移进来。
In this application, you will only have one DMA command active at a time, so all of your operations will use 0 as the DMA tag.
在这个应用程序中,一次只有一个dma命令是激活的,所以所有的操作都将使用0作为DMA标签。
The real power of mailboxes comes when a program combines the mailbox and the DMA approach.
当程序组合使用了邮箱和 DMA 方法时,才会显出邮箱的真正实力。
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