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发表于 2022-3-29 12:49:43
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F1手册写的有点不准确,不过对于读了正文的影响不大:
Once the channel is enabled, this register is read-only, indicating the
remaining bytes to be transmitted.
后来的系列改了,更精准:
It is decremented after each single DMA ‘read followed by write’ transfer, indicating
the remaining amount of data items to transfer. |
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